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Comparing libeio/eio.c (file contents):
Revision 1.2 by root, Sat May 10 23:33:40 2008 UTC vs.
Revision 1.86 by root, Thu Jul 14 18:30:10 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
6	#include "EXTERN.h"
7	#include "perl.h"
8	#include "XSUB.h"
9
10	#include <stddef.h>	53	#include <stddef.h>
11	#include <stdlib.h>	54	#include <stdlib.h>
		55	#include <string.h>
12	#include <errno.h>	56	#include <errno.h>
13	#include <sys/types.h>	57	#include <sys/types.h>
14	#include <sys/stat.h>	58	#include <sys/stat.h>
15	#include <limits.h>	59	#include <limits.h>
16	#include <fcntl.h>	60	#include <fcntl.h>
17	#include <sched.h>	61	#include <assert.h>
		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);
18		75
19	#ifndef EIO_FINISH	76	#ifndef EIO_FINISH
20	# 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
21	#endif	78	#endif
22		79
…		…
26		83
27	#ifndef EIO_FEED	84	#ifndef EIO_FEED
28	# 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)
29	#endif	86	#endif
30		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
31	#ifdef _WIN32	99	#ifdef _WIN32
32		100
33	/*doh*/	101	#define PAGESIZE 4096 /* GetSystemInfo? */
		102
		103	#define stat(path,buf) _stati64 (path,buf)
		104	#define lstat(path,buf) stat (path,buf)
		105	#define fstat(fd,buf) _fstati64 (path,buf)
		106	#define fsync(fd) (FlushFileBuffers (EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
		107	#define mkdir(path,mode) _mkdir (path)
		108	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
		109
		110	#define chown(path,uid,gid) EIO_ENOSYS ()
		111	#define fchown(fd,uid,gid) EIO_ENOSYS ()
		112	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
		113	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
		114	#define mknod(path,mode,dev) EIO_ENOSYS ()
		115	#define sync() EIO_ENOSYS ()
		116
		117	/* we could even stat and see if it exists */
		118	static int
		119	symlink (const char *old, const char *neu)
		120	{
		121	if (CreateSymbolicLink (neu, old, 1))
		122	return 0;
		123
		124	if (CreateSymbolicLink (neu, old, 0))
		125	return 0;
		126
		127	return EIO_ERRNO (ENOENT, -1);
		128	}
34		129
35	#else	130	#else
36		131
37	# include "config.h"
38	# include <sys/time.h>	132	#include <sys/time.h>
39	# include <sys/select.h>	133	#include <sys/select.h>
		134	#include <sys/statvfs.h>
40	# include <unistd.h>	135	#include <unistd.h>
41	# include <utime.h>	136	#include <utime.h>
42	# include <signal.h>	137	#include <signal.h>
		138	#include <dirent.h>
43		139
		140	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		141	#include <sys/mman.h>
		142	#endif
		143
		144	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
		145	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
		146	#define _DIRENT_HAVE_D_TYPE /* sigh */
		147	#define D_INO(de) (de)->d_fileno
		148	#define D_NAMLEN(de) (de)->d_namlen
		149	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
		150	#define D_INO(de) (de)->d_ino
		151	#endif
		152
		153	#ifdef _D_EXACT_NAMLEN
		154	#undef D_NAMLEN
		155	#define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
		156	#endif
		157
		158	#ifdef _DIRENT_HAVE_D_TYPE
		159	#define D_TYPE(de) (de)->d_type
		160	#endif
		161
44	# ifndef EIO_STRUCT_DIRENT	162	#ifndef EIO_STRUCT_DIRENT
45	# define EIO_STRUCT_DIRENT struct dirent	163	#define EIO_STRUCT_DIRENT struct dirent
		164	#endif
		165
46	# endif	166	#endif
47
48	#endif
49
50	# ifndef EIO_STRUCT_STAT
51	# define EIO_STRUCT_STAT struct stat
52	# endif
53		167
54	#if HAVE_SENDFILE	168	#if HAVE_SENDFILE
55	# if __linux	169	# if __linux
56	# include <sys/sendfile.h>	170	# include <sys/sendfile.h>
57	# elif __freebsd	171	# elif __FreeBSD__ || defined __APPLE__
58	# include <sys/socket.h>	172	# include <sys/socket.h>
59	# include <sys/uio.h>	173	# include <sys/uio.h>
60	# elif __hpux	174	# elif __hpux
61	# include <sys/socket.h>	175	# include <sys/socket.h>
62	# elif __solaris /* not yet */	176	# elif __solaris
63	# include <sys/sendfile.h>	177	# include <sys/sendfile.h>
64	# else	178	# else
65	# error sendfile support requested but not available	179	# error sendfile support requested but not available
66	# endif	180	# endif
67	#endif	181	#endif
68		182
69	/* number of seconds after which an idle threads exit */	183	#ifndef D_TYPE
70	#define IDLE_TIMEOUT 10	184	# define D_TYPE(de) 0
		185	#endif
		186	#ifndef D_INO
		187	# define D_INO(de) 0
		188	#endif
		189	#ifndef D_NAMLEN
		190	# define D_NAMLEN(de) strlen ((de)->d_name)
		191	#endif
71		192
72	/* used for struct dirent, AIX doesn't provide it */	193	/* used for struct dirent, AIX doesn't provide it */
73	#ifndef NAME_MAX	194	#ifndef NAME_MAX
74	# define NAME_MAX 4096	195	# define NAME_MAX 4096
75	#endif	196	#endif
76		197
		198	/* used for readlink etc. */
		199	#ifndef PATH_MAX
		200	# define PATH_MAX 4096
		201	#endif
		202
77	/* buffer size for various temporary buffers */	203	/* buffer size for various temporary buffers */
78	#define EIO_BUFSIZE 65536	204	#define EIO_BUFSIZE 65536
79		205
80	#define dBUF \	206	#define dBUF \
81	char *eio_buf; \	207	char *eio_buf; \
82	X_LOCK (wrklock); \	208	ETP_WORKER_LOCK (self); \
83	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	209	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \
84	X_UNLOCK (wrklock); \	210	ETP_WORKER_UNLOCK (self); \
		211	errno = ENOMEM; \
85	if (!eio_buf) \	212	if (!eio_buf) \
86	return -1;	213	return -1;
87		214
88	#define EIO_TICKS ((1000000 + 1023) >> 10)	215	#define EIO_TICKS ((1000000 + 1023) >> 10)
89		216
		217	#define ETP_PRI_MIN EIO_PRI_MIN
		218	#define ETP_PRI_MAX EIO_PRI_MAX
		219
		220	struct etp_worker;
		221
		222	#define ETP_REQ eio_req
		223	#define ETP_DESTROY(req) eio_destroy (req)
		224	static int eio_finish (eio_req *req);
		225	#define ETP_FINISH(req) eio_finish (req)
		226	static void eio_execute (struct etp_worker *self, eio_req *req);
		227	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		228
		229	#define ETP_WORKER_CLEAR(req) \
		230	if (wrk->dbuf) \
		231	{ \
		232	free (wrk->dbuf); \
		233	wrk->dbuf = 0; \
		234	} \
		235	\
		236	if (wrk->dirp) \
		237	{ \
		238	closedir (wrk->dirp); \
		239	wrk->dirp = 0; \
		240	}
		241
		242	#define ETP_WORKER_COMMON \
		243	void *dbuf; \
		244	DIR *dirp;
		245
		246	/*****************************************************************************/
		247
		248	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		249
		250	/* calculate time difference in ~1/EIO_TICKS of a second */
		251	ecb_inline int
		252	tvdiff (struct timeval *tv1, struct timeval *tv2)
		253	{
		254	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		255	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		256	}
		257
		258	static unsigned int started, idle, wanted = 4;
		259
90	static void (*want_poll_cb) (void);	260	static void (*want_poll_cb) (void);
91	static void (*done_poll_cb) (void);	261	static void (*done_poll_cb) (void);
92		262
93	static unsigned int max_poll_time = 0;	263	static unsigned int max_poll_time; /* reslock */
94	static unsigned int max_poll_reqs = 0;	264	static unsigned int max_poll_reqs; /* reslock */
95		265
96	/* calculcate time difference in ~1/EIO_TICKS of a second */	266	static volatile unsigned int nreqs; /* reqlock */
97	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	267	static volatile unsigned int nready; /* reqlock */
98	{	268	static volatile unsigned int npending; /* reqlock */
99	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	269	static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
100	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);	270	static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
101	}
102		271
103	static unsigned int started, idle, wanted;	272	static xmutex_t wrklock;
		273	static xmutex_t reslock;
		274	static xmutex_t reqlock;
		275	static xcond_t reqwait;
		276
		277	#if !HAVE_PREADWRITE
		278	/*
		279	* make our pread/pwrite emulation safe against themselves, but not against
		280	* normal read/write by using a mutex. slows down execution a lot,
		281	* but that's your problem, not mine.
		282	*/
		283	static xmutex_t preadwritelock = X_MUTEX_INIT;
		284	#endif
		285
		286	typedef struct etp_worker
		287	{
		288	/* locked by wrklock */
		289	struct etp_worker *prev, *next;
		290
		291	xthread_t tid;
		292
		293	/* locked by reslock, reqlock or wrklock */
		294	ETP_REQ *req; /* currently processed request */
		295
		296	ETP_WORKER_COMMON
		297	} etp_worker;
		298
		299	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
		300
		301	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		302	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
104		303
105	/* worker threads management */	304	/* worker threads management */
106	static mutex_t wrklock = X_MUTEX_INIT;
107		305
108	typedef struct worker {	306	static void ecb_cold
109	/* locked by wrklock */
110	struct worker *prev, *next;
111
112	thread_t tid;
113
114	/* locked by reslock, reqlock or wrklock */
115	eio_req *req; /* currently processed request */
116	void *dbuf;
117	DIR *dirp;
118	} worker;
119
120	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
121
122	static void worker_clear (worker *wrk)	307	etp_worker_clear (etp_worker *wrk)
123	{	308	{
124	if (wrk->dirp)	309	ETP_WORKER_CLEAR (wrk);
125	{
126	closedir (wrk->dirp);
127	wrk->dirp = 0;
128	}
129
130	if (wrk->dbuf)
131	{
132	free (wrk->dbuf);
133	wrk->dbuf = 0;
134	}
135	}	310	}
136		311
137	static void worker_free (worker *wrk)	312	static void ecb_cold
		313	etp_worker_free (etp_worker *wrk)
138	{	314	{
139	wrk->next->prev = wrk->prev;	315	wrk->next->prev = wrk->prev;
140	wrk->prev->next = wrk->next;	316	wrk->prev->next = wrk->next;
141		317
142	free (wrk);	318	free (wrk);
143	}	319	}
144		320
145	static volatile unsigned int nreqs, nready, npending;	321	static unsigned int
146	static volatile unsigned int max_idle = 4;	322	etp_nreqs (void)
147
148	static mutex_t reslock = X_MUTEX_INIT;
149	static mutex_t reqlock = X_MUTEX_INIT;
150	static cond_t reqwait = X_COND_INIT;
151
152	unsigned int eio_nreqs (void)
153	{	323	{
		324	int retval;
		325	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		326	retval = nreqs;
		327	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
154	return nreqs;	328	return retval;
155	}	329	}
156		330
157	unsigned int eio_nready (void)	331	static unsigned int
		332	etp_nready (void)
158	{	333	{
159	unsigned int retval;	334	unsigned int retval;
160		335
161	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	336	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
162	retval = nready;	337	retval = nready;
163	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	338	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
164		339
165	return retval;	340	return retval;
166	}	341	}
167		342
168	unsigned int eio_npending (void)	343	static unsigned int
		344	etp_npending (void)
169	{	345	{
170	unsigned int retval;	346	unsigned int retval;
171		347
172	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	348	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
173	retval = npending;	349	retval = npending;
174	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	350	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
175		351
176	return retval;	352	return retval;
177	}	353	}
178		354
179	unsigned int eio_nthreads (void)	355	static unsigned int
		356	etp_nthreads (void)
180	{	357	{
181	unsigned int retval;	358	unsigned int retval;
182		359
183	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	360	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
184	retval = started;	361	retval = started;
…		…
191	* a somewhat faster data structure might be nice, but	368	* a somewhat faster data structure might be nice, but
192	* with 8 priorities this actually needs <20 insns	369	* with 8 priorities this actually needs <20 insns
193	* per shift, the most expensive operation.	370	* per shift, the most expensive operation.
194	*/	371	*/
195	typedef struct {	372	typedef struct {
196	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	373	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
197	int size;	374	int size;
198	} reqq;	375	} etp_reqq;
199		376
200	static reqq req_queue;	377	static etp_reqq req_queue;
201	static reqq res_queue;	378	static etp_reqq res_queue;
202		379
203	static int reqq_push (reqq *q, eio_req *req)	380	static int ecb_noinline
		381	reqq_push (etp_reqq *q, ETP_REQ *req)
204	{	382	{
205	int pri = req->pri;	383	int pri = req->pri;
206	req->next = 0;	384	req->next = 0;
207		385
208	if (q->qe[pri])	386	if (q->qe[pri])
…		…
214	q->qe[pri] = q->qs[pri] = req;	392	q->qe[pri] = q->qs[pri] = req;
215		393
216	return q->size++;	394	return q->size++;
217	}	395	}
218		396
219	static eio_req *reqq_shift (reqq *q)	397	static ETP_REQ * ecb_noinline
		398	reqq_shift (etp_reqq *q)
220	{	399	{
221	int pri;	400	int pri;
222		401
223	if (!q->size)	402	if (!q->size)
224	return 0;	403	return 0;
225		404
226	--q->size;	405	--q->size;
227		406
228	for (pri = EIO_NUM_PRI; pri--; )	407	for (pri = ETP_NUM_PRI; pri--; )
229	{	408	{
230	eio_req *req = q->qs[pri];	409	eio_req *req = q->qs[pri];
231		410
232	if (req)	411	if (req)
233	{	412	{
…		…
239	}	418	}
240		419
241	abort ();	420	abort ();
242	}	421	}
243		422
244	static void grp_try_feed (eio_req *grp)	423	static void ecb_cold
		424	etp_thread_init (void)
245	{	425	{
246	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	426	#if !HAVE_PREADWRITE
		427	X_MUTEX_CREATE (preadwritelock);
		428	#endif
		429	X_MUTEX_CREATE (wrklock);
		430	X_MUTEX_CREATE (reslock);
		431	X_MUTEX_CREATE (reqlock);
		432	X_COND_CREATE (reqwait);
		433	}
		434
		435	static void ecb_cold
		436	etp_atfork_prepare (void)
		437	{
		438	}
		439
		440	static void ecb_cold
		441	etp_atfork_parent (void)
		442	{
		443	}
		444
		445	static void ecb_cold
		446	etp_atfork_child (void)
		447	{
		448	ETP_REQ *prv;
		449
		450	while ((prv = reqq_shift (&req_queue)))
		451	ETP_DESTROY (prv);
		452
		453	while ((prv = reqq_shift (&res_queue)))
		454	ETP_DESTROY (prv);
		455
		456	while (wrk_first.next != &wrk_first)
247	{	457	{
248	int old_len = grp->size;	458	etp_worker *wrk = wrk_first.next;
249		459
250	EIO_FEED (grp);	460	if (wrk->req)
		461	ETP_DESTROY (wrk->req);
251		462
252	/* stop if no progress has been made */	463	etp_worker_clear (wrk);
253	if (old_len == grp->size)	464	etp_worker_free (wrk);
254	{
255	grp->feed = 0;
256	break;
257	}
258	}	465	}
259	}
260		466
261	static int eio_finish (eio_req *req);	467	started = 0;
		468	idle = 0;
		469	nreqs = 0;
		470	nready = 0;
		471	npending = 0;
262		472
263	static int grp_dec (eio_req *grp)	473	etp_thread_init ();
264	{	474	}
265	--grp->size;
266		475
267	/* call feeder, if applicable */	476	static void ecb_cold
268	grp_try_feed (grp);	477	etp_once_init (void)
		478	{
		479	etp_thread_init ();
		480	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
		481	}
269		482
270	/* finish, if done */	483	static int ecb_cold
271	if (!grp->size && grp->int1)	484	etp_init (void (*want_poll)(void), void (*done_poll)(void))
272	return eio_finish (grp);	485	{
273	else	486	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
		487
		488	pthread_once (&doinit, etp_once_init);
		489
		490	want_poll_cb = want_poll;
		491	done_poll_cb = done_poll;
		492
274	return 0;	493	return 0;
275	}	494	}
276		495
277	void eio_destroy (eio_req *req)
278	{
279	if ((req)->flags & EIO_FLAG_PTR2_FREE)
280	free (req->ptr2);
281
282	EIO_DESTROY (req);
283	}
284
285	static int eio_finish (eio_req *req)
286	{
287	int res = EIO_FINISH (req);
288
289	if (req->grp)
290	{
291	int res2;
292	eio_req *grp = req->grp;
293
294	/* unlink request */
295	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
296	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
297
298	if (grp->grp_first == req)
299	grp->grp_first = req->grp_next;
300
301	res2 = grp_dec (grp);
302
303	if (!res && res2)
304	res = res2;
305	}
306
307	eio_destroy (req);
308
309	return res;
310	}
311
312	void eio_grp_cancel (eio_req *grp)
313	{
314	for (grp = grp->grp_first; grp; grp = grp->grp_next)
315	eio_cancel (grp);
316	}
317
318	void eio_cancel (eio_req *req)
319	{
320	req->flags |= EIO_FLAG_CANCELLED;
321
322	eio_grp_cancel (req);
323	}
324
325	X_THREAD_PROC (eio_proc);	496	X_THREAD_PROC (etp_proc);
326		497
327	static void start_thread (void)	498	static void ecb_cold
		499	etp_start_thread (void)
328	{	500	{
329	worker *wrk = calloc (1, sizeof (worker));	501	etp_worker *wrk = calloc (1, sizeof (etp_worker));
330		502
331	if (!wrk)	503	/*TODO*/
332	croak ("unable to allocate worker thread data");	504	assert (("unable to allocate worker thread data", wrk));
333		505
334	X_LOCK (wrklock);	506	X_LOCK (wrklock);
335		507
336	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	508	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
337	{	509	{
338	wrk->prev = &wrk_first;	510	wrk->prev = &wrk_first;
339	wrk->next = wrk_first.next;	511	wrk->next = wrk_first.next;
340	wrk_first.next->prev = wrk;	512	wrk_first.next->prev = wrk;
341	wrk_first.next = wrk;	513	wrk_first.next = wrk;
…		…
345	free (wrk);	517	free (wrk);
346		518
347	X_UNLOCK (wrklock);	519	X_UNLOCK (wrklock);
348	}	520	}
349		521
		522	static void
350	static void maybe_start_thread (void)	523	etp_maybe_start_thread (void)
351	{	524	{
352	if (eio_nthreads () >= wanted)	525	if (ecb_expect_true (etp_nthreads () >= wanted))
353	return;	526	return;
354		527
355	/* todo: maybe use idle here, but might be less exact */	528	/* todo: maybe use idle here, but might be less exact */
356	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	529	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
357	return;	530	return;
358		531
359	start_thread ();	532	etp_start_thread ();
360	}	533	}
361		534
362	void eio_submit (eio_req *req)	535	static void ecb_cold
363	{	536	etp_end_thread (void)
364	++nreqs;
365
366	X_LOCK (reqlock);
367	++nready;
368	reqq_push (&req_queue, req);
369	X_COND_SIGNAL (reqwait);
370	X_UNLOCK (reqlock);
371
372	maybe_start_thread ();
373	}
374
375	static void end_thread (void)
376	{	537	{
377	eio_req *req = calloc (1, sizeof (eio_req));	538	eio_req *req = calloc (1, sizeof (eio_req));
378		539
379	req->type = EIO_QUIT;	540	req->type = -1;
380	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	541	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
381		542
382	X_LOCK (reqlock);	543	X_LOCK (reqlock);
383	reqq_push (&req_queue, req);	544	reqq_push (&req_queue, req);
384	X_COND_SIGNAL (reqwait);	545	X_COND_SIGNAL (reqwait);
385	X_UNLOCK (reqlock);	546	X_UNLOCK (reqlock);
…		…
387	X_LOCK (wrklock);	548	X_LOCK (wrklock);
388	--started;	549	--started;
389	X_UNLOCK (wrklock);	550	X_UNLOCK (wrklock);
390	}	551	}
391		552
392	void eio_set_max_poll_time (double nseconds)	553	static int
393	{
394	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
395	max_poll_time = nseconds;
396	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
397	}
398
399	void eio_set_max_poll_reqs (unsigned int maxreqs)
400	{
401	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
402	max_poll_reqs = maxreqs;
403	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
404	}
405
406	void eio_set_max_idle (unsigned int nthreads)
407	{
408	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
409	max_idle = nthreads <= 0 ? 1 : nthreads;
410	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
411	}
412
413	void eio_set_min_parallel (unsigned int nthreads)
414	{
415	if (wanted < nthreads)
416	wanted = nthreads;
417	}
418
419	void eio_set_max_parallel (unsigned int nthreads)
420	{
421	if (wanted > nthreads)
422	wanted = nthreads;
423
424	while (started > wanted)
425	end_thread ();
426	}
427
428	int eio_poll (void)	554	etp_poll (void)
429	{	555	{
430	int maxreqs = max_poll_reqs;	556	unsigned int maxreqs;
		557	unsigned int maxtime;
431	struct timeval tv_start, tv_now;	558	struct timeval tv_start, tv_now;
432	eio_req *req;
433		559
		560	X_LOCK (reslock);
		561	maxreqs = max_poll_reqs;
		562	maxtime = max_poll_time;
		563	X_UNLOCK (reslock);
		564
434	if (max_poll_time)	565	if (maxtime)
435	gettimeofday (&tv_start, 0);	566	gettimeofday (&tv_start, 0);
436		567
437	for (;;)	568	for (;;)
438	{	569	{
		570	ETP_REQ *req;
		571
439	maybe_start_thread ();	572	etp_maybe_start_thread ();
440		573
441	X_LOCK (reslock);	574	X_LOCK (reslock);
442	req = reqq_shift (&res_queue);	575	req = reqq_shift (&res_queue);
443		576
444	if (req)	577	if (req)
…		…
452	X_UNLOCK (reslock);	585	X_UNLOCK (reslock);
453		586
454	if (!req)	587	if (!req)
455	return 0;	588	return 0;
456		589
		590	X_LOCK (reqlock);
457	--nreqs;	591	--nreqs;
		592	X_UNLOCK (reqlock);
458		593
459	if (req->type == EIO_GROUP && req->size)	594	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
460	{	595	{
461	req->int1 = 1; /* mark request as delayed */	596	req->int1 = 1; /* mark request as delayed */
462	continue;	597	continue;
463	}	598	}
464	else	599	else
465	{	600	{
466	int res = eio_finish (req);	601	int res = ETP_FINISH (req);
467	if (res)	602	if (ecb_expect_false (res))
468	return res;	603	return res;
469	}	604	}
470		605
471	if (maxreqs && !--maxreqs)	606	if (ecb_expect_false (maxreqs && !--maxreqs))
472	break;	607	break;
473		608
474	if (max_poll_time)	609	if (maxtime)
475	{	610	{
476	gettimeofday (&tv_now, 0);	611	gettimeofday (&tv_now, 0);
477		612
478	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	613	if (tvdiff (&tv_start, &tv_now) >= maxtime)
479	break;	614	break;
480	}	615	}
481	}	616	}
482		617
483	errno = EAGAIN;	618	errno = EAGAIN;
484	return -1;	619	return -1;
485	}	620	}
486		621
		622	static void
		623	etp_cancel (ETP_REQ *req)
		624	{
		625	req->cancelled = 1;
		626
		627	eio_grp_cancel (req);
		628	}
		629
		630	static void
		631	etp_submit (ETP_REQ *req)
		632	{
		633	req->pri -= ETP_PRI_MIN;
		634
		635	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
		636	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		637
		638	if (ecb_expect_false (req->type == EIO_GROUP))
		639	{
		640	/* I hope this is worth it :/ */
		641	X_LOCK (reqlock);
		642	++nreqs;
		643	X_UNLOCK (reqlock);
		644
		645	X_LOCK (reslock);
		646
		647	++npending;
		648
		649	if (!reqq_push (&res_queue, req) && want_poll_cb)
		650	want_poll_cb ();
		651
		652	X_UNLOCK (reslock);
		653	}
		654	else
		655	{
		656	X_LOCK (reqlock);
		657	++nreqs;
		658	++nready;
		659	reqq_push (&req_queue, req);
		660	X_COND_SIGNAL (reqwait);
		661	X_UNLOCK (reqlock);
		662
		663	etp_maybe_start_thread ();
		664	}
		665	}
		666
		667	static void ecb_cold
		668	etp_set_max_poll_time (double nseconds)
		669	{
		670	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		671	max_poll_time = nseconds * EIO_TICKS;
		672	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		673	}
		674
		675	static void ecb_cold
		676	etp_set_max_poll_reqs (unsigned int maxreqs)
		677	{
		678	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		679	max_poll_reqs = maxreqs;
		680	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		681	}
		682
		683	static void ecb_cold
		684	etp_set_max_idle (unsigned int nthreads)
		685	{
		686	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		687	max_idle = nthreads;
		688	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		689	}
		690
		691	static void ecb_cold
		692	etp_set_idle_timeout (unsigned int seconds)
		693	{
		694	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		695	idle_timeout = seconds;
		696	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		697	}
		698
		699	static void ecb_cold
		700	etp_set_min_parallel (unsigned int nthreads)
		701	{
		702	if (wanted < nthreads)
		703	wanted = nthreads;
		704	}
		705
		706	static void ecb_cold
		707	etp_set_max_parallel (unsigned int nthreads)
		708	{
		709	if (wanted > nthreads)
		710	wanted = nthreads;
		711
		712	while (started > wanted)
		713	etp_end_thread ();
		714	}
		715
		716	/*****************************************************************************/
		717
		718	static void
		719	grp_try_feed (eio_req *grp)
		720	{
		721	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
		722	{
		723	grp->flags &= ~EIO_FLAG_GROUPADD;
		724
		725	EIO_FEED (grp);
		726
		727	/* stop if no progress has been made */
		728	if (!(grp->flags & EIO_FLAG_GROUPADD))
		729	{
		730	grp->feed = 0;
		731	break;
		732	}
		733	}
		734	}
		735
		736	static int
		737	grp_dec (eio_req *grp)
		738	{
		739	--grp->size;
		740
		741	/* call feeder, if applicable */
		742	grp_try_feed (grp);
		743
		744	/* finish, if done */
		745	if (!grp->size && grp->int1)
		746	return eio_finish (grp);
		747	else
		748	return 0;
		749	}
		750
		751	static void
		752	eio_destroy (eio_req *req)
		753	{
		754	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
		755	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
		756
		757	EIO_DESTROY (req);
		758	}
		759
		760	static int
		761	eio_finish (eio_req *req)
		762	{
		763	int res = EIO_FINISH (req);
		764
		765	if (req->grp)
		766	{
		767	int res2;
		768	eio_req *grp = req->grp;
		769
		770	/* unlink request */
		771	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		772	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		773
		774	if (grp->grp_first == req)
		775	grp->grp_first = req->grp_next;
		776
		777	res2 = grp_dec (grp);
		778
		779	if (!res)
		780	res = res2;
		781	}
		782
		783	eio_destroy (req);
		784
		785	return res;
		786	}
		787
		788	void
		789	eio_grp_cancel (eio_req *grp)
		790	{
		791	for (grp = grp->grp_first; grp; grp = grp->grp_next)
		792	eio_cancel (grp);
		793	}
		794
		795	void
		796	eio_cancel (eio_req *req)
		797	{
		798	etp_cancel (req);
		799	}
		800
		801	void
		802	eio_submit (eio_req *req)
		803	{
		804	etp_submit (req);
		805	}
		806
		807	unsigned int
		808	eio_nreqs (void)
		809	{
		810	return etp_nreqs ();
		811	}
		812
		813	unsigned int
		814	eio_nready (void)
		815	{
		816	return etp_nready ();
		817	}
		818
		819	unsigned int
		820	eio_npending (void)
		821	{
		822	return etp_npending ();
		823	}
		824
		825	unsigned int ecb_cold
		826	eio_nthreads (void)
		827	{
		828	return etp_nthreads ();
		829	}
		830
		831	void ecb_cold
		832	eio_set_max_poll_time (double nseconds)
		833	{
		834	etp_set_max_poll_time (nseconds);
		835	}
		836
		837	void ecb_cold
		838	eio_set_max_poll_reqs (unsigned int maxreqs)
		839	{
		840	etp_set_max_poll_reqs (maxreqs);
		841	}
		842
		843	void ecb_cold
		844	eio_set_max_idle (unsigned int nthreads)
		845	{
		846	etp_set_max_idle (nthreads);
		847	}
		848
		849	void ecb_cold
		850	eio_set_idle_timeout (unsigned int seconds)
		851	{
		852	etp_set_idle_timeout (seconds);
		853	}
		854
		855	void ecb_cold
		856	eio_set_min_parallel (unsigned int nthreads)
		857	{
		858	etp_set_min_parallel (nthreads);
		859	}
		860
		861	void ecb_cold
		862	eio_set_max_parallel (unsigned int nthreads)
		863	{
		864	etp_set_max_parallel (nthreads);
		865	}
		866
		867	int eio_poll (void)
		868	{
		869	return etp_poll ();
		870	}
		871
487	/*****************************************************************************/	872	/*****************************************************************************/
488	/* work around various missing functions */	873	/* work around various missing functions */
489		874
490	#if !HAVE_PREADWRITE	875	#if !HAVE_PREADWRITE
		876	# undef pread
		877	# undef pwrite
491	# define pread aio_pread	878	# define pread eio__pread
492	# define pwrite aio_pwrite	879	# define pwrite eio__pwrite
493		880
494	/*	881	static ssize_t
495	* make our pread/pwrite safe against themselves, but not against	882	eio__pread (int fd, void *buf, size_t count, off_t offset)
496	* normal read/write by using a mutex. slows down execution a lot,
497	* but that's your problem, not mine.
498	*/
499	static mutex_t preadwritelock = X_MUTEX_INIT;
500
501	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
502	{	883	{
503	ssize_t res;	884	ssize_t res;
504	off_t ooffset;	885	off_t ooffset;
505		886
506	X_LOCK (preadwritelock);	887	X_LOCK (preadwritelock);
…		…
511	X_UNLOCK (preadwritelock);	892	X_UNLOCK (preadwritelock);
512		893
513	return res;	894	return res;
514	}	895	}
515		896
516	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	897	static ssize_t
		898	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
517	{	899	{
518	ssize_t res;	900	ssize_t res;
519	off_t ooffset;	901	off_t ooffset;
520		902
521	X_LOCK (preadwritelock);	903	X_LOCK (preadwritelock);
522	ooffset = lseek (fd, 0, SEEK_CUR);	904	ooffset = lseek (fd, 0, SEEK_CUR);
523	lseek (fd, offset, SEEK_SET);	905	lseek (fd, offset, SEEK_SET);
524	res = write (fd, buf, count);	906	res = write (fd, buf, count);
525	lseek (fd, offset, SEEK_SET);	907	lseek (fd, ooffset, SEEK_SET);
526	X_UNLOCK (preadwritelock);	908	X_UNLOCK (preadwritelock);
527		909
528	return res;	910	return res;
529	}	911	}
530	#endif	912	#endif
531		913
532	#ifndef HAVE_FUTIMES	914	#ifndef HAVE_UTIMES
533		915
		916	# undef utimes
534	# define utimes(path,times) aio_utimes (path, times)	917	# define utimes(path,times) eio__utimes (path, times)
535	# define futimes(fd,times) aio_futimes (fd, times)
536		918
		919	static int
537	static int aio_utimes (const char *filename, const struct timeval times[2])	920	eio__utimes (const char *filename, const struct timeval times[2])
538	{	921	{
539	if (times)	922	if (times)
540	{	923	{
541	struct utimbuf buf;	924	struct utimbuf buf;
542		925
…		…
547	}	930	}
548	else	931	else
549	return utime (filename, 0);	932	return utime (filename, 0);
550	}	933	}
551		934
		935	#endif
		936
		937	#ifndef HAVE_FUTIMES
		938
		939	# undef futimes
		940	# define futimes(fd,times) eio__futimes (fd, times)
		941
		942	static int
552	static int aio_futimes (int fd, const struct timeval tv[2])	943	eio__futimes (int fd, const struct timeval tv[2])
553	{	944	{
554	errno = ENOSYS;	945	errno = ENOSYS;
555	return -1;	946	return -1;
556	}	947	}
557		948
558	#endif	949	#endif
559		950
560	#if !HAVE_FDATASYNC	951	#if !HAVE_FDATASYNC
		952	# undef fdatasync
561	# define fdatasync fsync	953	# define fdatasync(fd) fsync (fd)
562	#endif	954	#endif
		955
		956	/* sync_file_range always needs emulation */
		957	static int
		958	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
		959	{
		960	#if HAVE_SYNC_FILE_RANGE
		961	int res;
		962
		963	if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
		964	|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
		965	|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
		966	{
		967	flags = 0
		968	| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
		969	| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
		970	| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
		971	}
		972
		973	res = sync_file_range (fd, offset, nbytes, flags);
		974
		975	if (!res || errno != ENOSYS)
		976	return res;
		977	#endif
		978
		979	/* even though we could play tricks with the flags, it's better to always
		980	* call fdatasync, as that matches the expectation of its users best */
		981	return fdatasync (fd);
		982	}
		983
		984	static int
		985	eio__fallocate (int fd, int mode, off_t offset, size_t len)
		986	{
		987	#if HAVE_FALLOCATE
		988	return fallocate (fd, mode, offset, len);
		989	#else
		990	errno = ENOSYS;
		991	return -1;
		992	#endif
		993	}
563		994
564	#if !HAVE_READAHEAD	995	#if !HAVE_READAHEAD
		996	# undef readahead
565	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	997	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
566		998
		999	static ssize_t
567	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	1000	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
568	{	1001	{
569	size_t todo = count;	1002	size_t todo = count;
570	dBUF;	1003	dBUF;
571		1004
572	while (todo > 0)	1005	while (todo > 0)
573	{	1006	{
574	size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;	1007	size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;
575		1008
576	pread (fd, aio_buf, len, offset);	1009	pread (fd, eio_buf, len, offset);
577	offset += len;	1010	offset += len;
578	todo -= len;	1011	todo -= len;
579	}	1012	}
580		1013
581	errno = 0;	1014	errno = 0;
582	return count;	1015	return count;
583	}	1016	}
584		1017
585	#endif	1018	#endif
586		1019
587	#if !HAVE_READDIR_R
588	# define readdir_r aio_readdir_r
589
590	static mutex_t readdirlock = X_MUTEX_INIT;
591
592	static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)
593	{
594	X_DIRENT *e;
595	int errorno;
596
597	X_LOCK (readdirlock);
598
599	e = readdir (dirp);
600	errorno = errno;
601
602	if (e)
603	{
604	*res = ent;
605	strcpy (ent->d_name, e->d_name);
606	}
607	else
608	*res = 0;
609
610	X_UNLOCK (readdirlock);
611
612	errno = errorno;
613	return e ? 0 : -1;
614	}
615	#endif
616
617	/* sendfile always needs emulation */	1020	/* sendfile always needs emulation */
		1021	static ssize_t
618	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	1022	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
619	{	1023	{
		1024	ssize_t written = 0;
620	ssize_t res;	1025	ssize_t res;
621		1026
622	if (!count)	1027	if (!count)
623	return 0;	1028	return 0;
624		1029
		1030	for (;;)
		1031	{
		1032	#ifdef __APPLE__
		1033	# undef HAVE_SENDFILE /* broken, as everything on os x */
		1034	#endif
625	#if HAVE_SENDFILE	1035	#if HAVE_SENDFILE
626	# if __linux	1036	# if __linux
		1037	off_t soffset = offset;
627	res = sendfile (ofd, ifd, &offset, count);	1038	res = sendfile (ofd, ifd, &soffset, count);
628		1039
629	# elif __freebsd	1040	# elif __FreeBSD__
630	/*	1041	/*
631	* Of course, the freebsd sendfile is a dire hack with no thoughts	1042	* Of course, the freebsd sendfile is a dire hack with no thoughts
632	* wasted on making it similar to other I/O functions.	1043	* wasted on making it similar to other I/O functions.
633	*/	1044	*/
634	{
635	off_t sbytes;	1045	off_t sbytes;
636	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	1046	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
637		1047
638	if (res < 0 && sbytes)	1048	#if 0 /* according to the manpage, this is correct, but broken behaviour */
639	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */	1049	/* freebsd' sendfile will return 0 on success */
		1050	/* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
		1051	/* not on e.g. EIO or EPIPE - sounds broken */
		1052	if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
640	res = sbytes;	1053	res = sbytes;
641	}	1054	#endif
		1055
		1056	/* according to source inspection, this is correct, and useful behaviour */
		1057	if (sbytes)
		1058	res = sbytes;
		1059
		1060	# elif defined (__APPLE__)
		1061	off_t sbytes = count;
		1062	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
		1063
		1064	/* according to the manpage, sbytes is always valid */
		1065	if (sbytes)
		1066	res = sbytes;
642		1067
643	# elif __hpux	1068	# elif __hpux
644	res = sendfile (ofd, ifd, offset, count, 0, 0);	1069	res = sendfile (ofd, ifd, offset, count, 0, 0);
645		1070
646	# elif __solaris	1071	# elif __solaris
647	{
648	struct sendfilevec vec;	1072	struct sendfilevec vec;
649	size_t sbytes;	1073	size_t sbytes;
650		1074
651	vec.sfv_fd = ifd;	1075	vec.sfv_fd = ifd;
652	vec.sfv_flag = 0;	1076	vec.sfv_flag = 0;
653	vec.sfv_off = offset;	1077	vec.sfv_off = offset;
654	vec.sfv_len = count;	1078	vec.sfv_len = count;
655		1079
656	res = sendfilev (ofd, &vec, 1, &sbytes);	1080	res = sendfilev (ofd, &vec, 1, &sbytes);
657		1081
658	if (res < 0 && sbytes)	1082	if (res < 0 && sbytes)
659	res = sbytes;	1083	res = sbytes;
660	}
661		1084
662	# endif	1085	# endif
		1086
		1087	#elif defined (_WIN32) && 0
		1088	/* does not work, just for documentation of what would need to be done */
		1089	/* actually, cannot be done like this, as TransmitFile changes the file offset, */
		1090	/* libeio guarantees that the file offset does not change, and windows */
		1091	/* has no way to get an independent handle to the same file description */
		1092	HANDLE h = TO_SOCKET (ifd);
		1093	SetFilePointer (h, offset, 0, FILE_BEGIN);
		1094	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
		1095
663	#else	1096	#else
664	res = -1;	1097	res = -1;
665	errno = ENOSYS;	1098	errno = ENOSYS;
666	#endif	1099	#endif
667		1100
		1101	/* we assume sendfile can copy at least 128mb in one go */
		1102	if (res <= 128 * 1024 * 1024)
		1103	{
		1104	if (res > 0)
		1105	written += res;
		1106
		1107	if (written)
		1108	return written;
		1109
		1110	break;
		1111	}
		1112	else
		1113	{
		1114	/* if we requested more, then probably the kernel was lazy */
		1115	written += res;
		1116	offset += res;
		1117	count -= res;
		1118
		1119	if (!count)
		1120	return written;
		1121	}
		1122	}
		1123
668	if (res < 0	1124	if (res < 0
669	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	1125	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		1126	/* BSDs */
		1127	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
		1128	|| errno == ENOTSUP
		1129	#endif
		1130	|| errno == EOPNOTSUPP /* BSDs */
670	#if __solaris	1131	#if __solaris
671	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	1132	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
672	#endif	1133	#endif
673	)	1134	)
674	)	1135	)
…		…
705	}	1166	}
706		1167
707	return res;	1168	return res;
708	}	1169	}
709		1170
		1171	#ifdef PAGESIZE
		1172	# define eio_pagesize() PAGESIZE
		1173	#else
		1174	static intptr_t
		1175	eio_pagesize (void)
		1176	{
		1177	static intptr_t page;
		1178
		1179	if (!page)
		1180	page = sysconf (_SC_PAGESIZE);
		1181
		1182	return page;
		1183	}
		1184	#endif
		1185
		1186	static void
		1187	eio_page_align (void **addr, size_t *length)
		1188	{
		1189	intptr_t mask = eio_pagesize () - 1;
		1190
		1191	/* round down addr */
		1192	intptr_t adj = mask & (intptr_t)*addr;
		1193
		1194	*addr = (void *)((intptr_t)*addr - adj);
		1195	*length += adj;
		1196
		1197	/* round up length */
		1198	*length = (*length + mask) & ~mask;
		1199	}
		1200
		1201	#if !_POSIX_MEMLOCK
		1202	# define eio__mlockall(a) eio_nosyscall()
		1203	#else
		1204
		1205	static int
		1206	eio__mlockall (int flags)
		1207	{
		1208	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1209	extern int mallopt (int, int);
		1210	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1211	#endif
		1212
		1213	if (EIO_MCL_CURRENT != MCL_CURRENT
		1214	|| EIO_MCL_FUTURE != MCL_FUTURE)
		1215	{
		1216	flags = 0
		1217	| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
		1218	| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
		1219	}
		1220
		1221	return mlockall (flags);
		1222	}
		1223	#endif
		1224
		1225	#if !_POSIX_MEMLOCK_RANGE
		1226	# define eio__mlock(a,b) EIO_ENOSYS ()
		1227	#else
		1228
		1229	static int
		1230	eio__mlock (void *addr, size_t length)
		1231	{
		1232	eio_page_align (&addr, &length);
		1233
		1234	return mlock (addr, length);
		1235	}
		1236
		1237	#endif
		1238
		1239	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1240	# define eio__msync(a,b,c) EIO_ENOSYS ()
		1241	#else
		1242
		1243	static int
		1244	eio__msync (void *mem, size_t len, int flags)
		1245	{
		1246	eio_page_align (&mem, &len);
		1247
		1248	if (EIO_MS_ASYNC != MS_SYNC
		1249	|| EIO_MS_INVALIDATE != MS_INVALIDATE
		1250	|| EIO_MS_SYNC != MS_SYNC)
		1251	{
		1252	flags = 0
		1253	| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
		1254	| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
		1255	| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
		1256	}
		1257
		1258	return msync (mem, len, flags);
		1259	}
		1260
		1261	#endif
		1262
		1263	static int
		1264	eio__mtouch (eio_req *req)
		1265	{
		1266	void *mem = req->ptr2;
		1267	size_t len = req->size;
		1268	int flags = req->int1;
		1269
		1270	eio_page_align (&mem, &len);
		1271
		1272	{
		1273	intptr_t addr = (intptr_t)mem;
		1274	intptr_t end = addr + len;
		1275	intptr_t page = eio_pagesize ();
		1276
		1277	if (addr < end)
		1278	if (flags & EIO_MT_MODIFY) /* modify */
		1279	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1280	else
		1281	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1282	}
		1283
		1284	return 0;
		1285	}
		1286
		1287	/*****************************************************************************/
		1288	/* requests implemented outside eio_execute, because they are so large */
		1289
		1290	static void
		1291	eio__realpath (eio_req *req, etp_worker *self)
		1292	{
		1293	char *rel = req->ptr1;
		1294	char *res;
		1295	char *tmp1, *tmp2;
		1296	#if SYMLOOP_MAX > 32
		1297	int symlinks = SYMLOOP_MAX;
		1298	#else
		1299	int symlinks = 32;
		1300	#endif
		1301
		1302	req->result = -1;
		1303
		1304	errno = EINVAL;
		1305	if (!rel)
		1306	return;
		1307
		1308	errno = ENOENT;
		1309	if (!*rel)
		1310	return;
		1311
		1312	if (!req->ptr2)
		1313	{
		1314	X_LOCK (wrklock);
		1315	req->flags |= EIO_FLAG_PTR2_FREE;
		1316	X_UNLOCK (wrklock);
		1317	req->ptr2 = malloc (PATH_MAX * 3);
		1318
		1319	errno = ENOMEM;
		1320	if (!req->ptr2)
		1321	return;
		1322	}
		1323
		1324	res = req->ptr2;
		1325	tmp1 = res + PATH_MAX;
		1326	tmp2 = tmp1 + PATH_MAX;
		1327
		1328	#if 0 /* disabled, the musl way to do things is just too racy */
		1329	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
		1330	/* on linux we may be able to ask the kernel */
		1331	{
		1332	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
		1333
		1334	if (fd >= 0)
		1335	{
		1336	sprintf (tmp1, "/proc/self/fd/%d", fd);
		1337	req->result = readlink (tmp1, res, PATH_MAX);
		1338	close (fd);
		1339
		1340	/* here we should probably stat the open file and the disk file, to make sure they still match */
		1341
		1342	if (req->result > 0)
		1343	goto done;
		1344	}
		1345	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
		1346	return;
		1347	}
		1348	#endif
		1349	#endif
		1350
		1351	if (*rel != '/')
		1352	{
		1353	if (!getcwd (res, PATH_MAX))
		1354	return;
		1355
		1356	if (res [1]) /* only use if not / */
		1357	res += strlen (res);
		1358	}
		1359
		1360	while (*rel)
		1361	{
		1362	ssize_t len, linklen;
		1363	char *beg = rel;
		1364
		1365	while (*rel && *rel != '/')
		1366	++rel;
		1367
		1368	len = rel - beg;
		1369
		1370	if (!len) /* skip slashes */
		1371	{
		1372	++rel;
		1373	continue;
		1374	}
		1375
		1376	if (beg [0] == '.')
		1377	{
		1378	if (len == 1)
		1379	continue; /* . - nop */
		1380
		1381	if (beg [1] == '.' && len == 2)
		1382	{
		1383	/* .. - back up one component, if possible */
		1384
		1385	while (res != req->ptr2)
		1386	if (*--res == '/')
		1387	break;
		1388
		1389	continue;
		1390	}
		1391	}
		1392
		1393	errno = ENAMETOOLONG;
		1394	if (res + 1 + len + 1 >= tmp1)
		1395	return;
		1396
		1397	/* copy one component */
		1398	*res = '/';
		1399	memcpy (res + 1, beg, len);
		1400
		1401	/* zero-terminate, for readlink */
		1402	res [len + 1] = 0;
		1403
		1404	/* now check if it's a symlink */
		1405	linklen = readlink (req->ptr2, tmp1, PATH_MAX);
		1406
		1407	if (linklen < 0)
		1408	{
		1409	if (errno != EINVAL)
		1410	return;
		1411
		1412	/* it's a normal directory. hopefully */
		1413	res += len + 1;
		1414	}
		1415	else
		1416	{
		1417	/* yay, it was a symlink - build new path in tmp2 */
		1418	int rellen = strlen (rel);
		1419
		1420	errno = ENAMETOOLONG;
		1421	if (linklen + 1 + rellen >= PATH_MAX)
		1422	return;
		1423
		1424	errno = ELOOP;
		1425	if (!--symlinks)
		1426	return;
		1427
		1428	if (*tmp1 == '/')
		1429	res = req->ptr2; /* symlink resolves to an absolute path */
		1430
		1431	/* we need to be careful, as rel might point into tmp2 already */
		1432	memmove (tmp2 + linklen + 1, rel, rellen + 1);
		1433	tmp2 [linklen] = '/';
		1434	memcpy (tmp2, tmp1, linklen);
		1435
		1436	rel = tmp2;
		1437	}
		1438	}
		1439
		1440	/* special case for the lone root path */
		1441	if (res == req->ptr2)
		1442	*res++ = '/';
		1443
		1444	req->result = res - (char *)req->ptr2;
		1445
		1446	done:
		1447	req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */
		1448	}
		1449
		1450	static signed char
		1451	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
		1452	{
		1453	return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
		1454	: a->inode < b->inode ? -1
		1455	: a->inode > b->inode ? 1
		1456	: 0;
		1457	}
		1458
		1459	#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
		1460
		1461	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
		1462	#define EIO_SORT_FAST 60 /* when to only use insertion sort */
		1463
		1464	static void
		1465	eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
		1466	{
		1467	unsigned char bits [9 + sizeof (ino_t) * 8];
		1468	unsigned char *bit = bits;
		1469
		1470	assert (CHAR_BIT == 8);
		1471	assert (sizeof (eio_dirent) * 8 < 256);
		1472	assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
		1473	assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */
		1474
		1475	if (size <= EIO_SORT_FAST)
		1476	return;
		1477
		1478	/* first prepare an array of bits to test in our radix sort */
		1479	/* try to take endianness into account, as well as differences in ino_t sizes */
		1480	/* inode_bits must contain all inodes ORed together */
		1481	/* which is used to skip bits that are 0 everywhere, which is very common */
		1482	{
		1483	ino_t endianness;
		1484	int i, j;
		1485
		1486	/* we store the byte offset of byte n into byte n of "endianness" */
		1487	for (i = 0; i < sizeof (ino_t); ++i)
		1488	((unsigned char *)&endianness)[i] = i;
		1489
		1490	*bit++ = 0;
		1491
		1492	for (i = 0; i < sizeof (ino_t); ++i)
		1493	{
		1494	/* shifting off the byte offsets out of "endianness" */
		1495	int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
		1496	endianness >>= 8;
		1497
		1498	for (j = 0; j < 8; ++j)
		1499	if (inode_bits & (((ino_t)1) << (i * 8 + j)))
		1500	*bit++ = offs + j;
		1501	}
		1502
		1503	for (j = 0; j < 8; ++j)
		1504	if (score_bits & (1 << j))
		1505	*bit++ = offsetof (eio_dirent, score) * 8 + j;
		1506	}
		1507
		1508	/* now actually do the sorting (a variant of MSD radix sort) */
		1509	{
		1510	eio_dirent *base_stk [9 + sizeof (ino_t) * 8], *base;
		1511	eio_dirent *end_stk [9 + sizeof (ino_t) * 8], *end;
		1512	unsigned char *bit_stk [9 + sizeof (ino_t) * 8];
		1513	int stk_idx = 0;
		1514
		1515	base_stk [stk_idx] = dents;
		1516	end_stk [stk_idx] = dents + size;
		1517	bit_stk [stk_idx] = bit - 1;
		1518
		1519	do
		1520	{
		1521	base = base_stk [stk_idx];
		1522	end = end_stk [stk_idx];
		1523	bit = bit_stk [stk_idx];
		1524
		1525	for (;;)
		1526	{
		1527	unsigned char O = *bit >> 3;
		1528	unsigned char M = 1 << (*bit & 7);
		1529
		1530	eio_dirent *a = base;
		1531	eio_dirent *b = end;
		1532
		1533	if (b - a < EIO_SORT_CUTOFF)
		1534	break;
		1535
		1536	/* now bit-partition the array on the bit */
		1537	/* this ugly asymmetric loop seems to perform much better than typical */
		1538	/* partition algos found in the literature */
		1539	do
		1540	if (!(((unsigned char *)a)[O] & M))
		1541	++a;
		1542	else if (!(((unsigned char *)--b)[O] & M))
		1543	{
		1544	eio_dirent tmp = *a; *a = *b; *b = tmp;
		1545	++a;
		1546	}
		1547	while (b > a);
		1548
		1549	/* next bit, or stop, if no bits left in this path */
		1550	if (!*--bit)
		1551	break;
		1552
		1553	base_stk [stk_idx] = a;
		1554	end_stk [stk_idx] = end;
		1555	bit_stk [stk_idx] = bit;
		1556	++stk_idx;
		1557
		1558	end = a;
		1559	}
		1560	}
		1561	while (stk_idx--);
		1562	}
		1563	}
		1564
		1565	static void
		1566	eio_dent_insertion_sort (eio_dirent *dents, int size)
		1567	{
		1568	/* first move the smallest element to the front, to act as a sentinel */
		1569	{
		1570	int i;
		1571	eio_dirent *min = dents;
		1572
		1573	/* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
		1574	for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
		1575	if (EIO_DENT_CMP (dents [i], <, *min))
		1576	min = &dents [i];
		1577
		1578	/* swap elements 0 and j (minimum) */
		1579	{
		1580	eio_dirent tmp = *dents; *dents = *min; *min = tmp;
		1581	}
		1582	}
		1583
		1584	/* then do standard insertion sort, assuming that all elements are >= dents [0] */
		1585	{
		1586	eio_dirent *i, *j;
		1587
		1588	for (i = dents + 1; i < dents + size; ++i)
		1589	{
		1590	eio_dirent value = *i;
		1591
		1592	for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
		1593	j [1] = j [0];
		1594
		1595	j [1] = value;
		1596	}
		1597	}
		1598	}
		1599
		1600	static void
		1601	eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
		1602	{
		1603	if (size <= 1)
		1604	return; /* our insertion sort relies on size > 0 */
		1605
		1606	/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
		1607	/* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
		1608	eio_dent_radix_sort (dents, size, score_bits, inode_bits);
		1609
		1610	/* use an insertion sort at the end, or for small arrays, */
		1611	/* as insertion sort is more efficient for small partitions */
		1612	eio_dent_insertion_sort (dents, size);
		1613	}
		1614
710	/* read a full directory */	1615	/* read a full directory */
		1616	static void
711	static void scandir_ (eio_req *req, worker *self)	1617	eio__scandir (eio_req *req, etp_worker *self)
712	{	1618	{
713	DIR *dirp;	1619	DIR *dirp;
714	union
715	{
716	EIO_STRUCT_DIRENT d;
717	char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1];
718	} *u;
719	EIO_STRUCT_DIRENT *entp;	1620	EIO_STRUCT_DIRENT *entp;
720	char *name, *names;	1621	char *name, *names;
721	int memlen = 4096;	1622	int namesalloc = 4096;
722	int memofs = 0;	1623	int namesoffs = 0;
		1624	int flags = req->int1;
		1625	eio_dirent *dents = 0;
		1626	int dentalloc = 128;
723	int res = 0;	1627	int dentoffs = 0;
		1628	ino_t inode_bits = 0;
		1629
		1630	req->result = -1;
		1631
		1632	if (!(flags & EIO_READDIR_DENTS))
		1633	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
724		1634
725	X_LOCK (wrklock);	1635	X_LOCK (wrklock);
		1636	/* the corresponding closedir is in ETP_WORKER_CLEAR */
726	self->dirp = dirp = opendir (req->ptr1);	1637	self->dirp = dirp = opendir (req->ptr1);
727	self->dbuf = u = malloc (sizeof (*u));	1638
728	req->flags |= EIO_FLAG_PTR2_FREE;	1639	if (req->flags & EIO_FLAG_PTR1_FREE)
		1640	free (req->ptr1);
		1641
		1642	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
		1643	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
729	req->ptr2 = names = malloc (memlen);	1644	req->ptr2 = names = malloc (namesalloc);
730	X_UNLOCK (wrklock);	1645	X_UNLOCK (wrklock);
731		1646
732	if (dirp && u && names)	1647	if (dirp && names && (!flags || dents))
733	for (;;)	1648	for (;;)
734	{	1649	{
735	errno = 0;	1650	errno = 0;
736	readdir_r (dirp, &u->d, &entp);	1651	entp = readdir (dirp);
737		1652
738	if (!entp)	1653	if (!entp)
		1654	{
		1655	if (errno)
		1656	break;
		1657
		1658	/* sort etc. */
		1659	req->int1 = flags;
		1660	req->result = dentoffs;
		1661
		1662	if (flags & EIO_READDIR_STAT_ORDER)
		1663	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
		1664	else if (flags & EIO_READDIR_DIRS_FIRST)
		1665	if (flags & EIO_READDIR_FOUND_UNKNOWN)
		1666	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
		1667	else
		1668	{
		1669	/* in this case, all is known, and we just put dirs first and sort them */
		1670	eio_dirent *oth = dents + dentoffs;
		1671	eio_dirent *dir = dents;
		1672
		1673	/* now partition dirs to the front, and non-dirs to the back */
		1674	/* by walking from both sides and swapping if necessary */
		1675	while (oth > dir)
		1676	{
		1677	if (dir->type == EIO_DT_DIR)
		1678	++dir;
		1679	else if ((--oth)->type == EIO_DT_DIR)
		1680	{
		1681	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
		1682
		1683	++dir;
		1684	}
		1685	}
		1686
		1687	/* now sort the dirs only (dirs all have the same score) */
		1688	eio_dent_sort (dents, dir - dents, 0, inode_bits);
		1689	}
		1690
739	break;	1691	break;
		1692	}
740		1693
		1694	/* now add the entry to our list(s) */
741	name = entp->d_name;	1695	name = entp->d_name;
742		1696
		1697	/* skip . and .. entries */
743	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1698	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
744	{	1699	{
745	int len = strlen (name) + 1;	1700	int len = D_NAMLEN (entp) + 1;
746		1701
747	res++;	1702	while (ecb_expect_false (namesoffs + len > namesalloc))
748
749	while (memofs + len > memlen)
750	{	1703	{
751	memlen *= 2;	1704	namesalloc *= 2;
752	X_LOCK (wrklock);	1705	X_LOCK (wrklock);
753	req->ptr2 = names = realloc (names, memlen);	1706	req->ptr2 = names = realloc (names, namesalloc);
754	X_UNLOCK (wrklock);	1707	X_UNLOCK (wrklock);
755		1708
756	if (!names)	1709	if (!names)
757	break;	1710	break;
758	}	1711	}
759		1712
760	memcpy (names + memofs, name, len);	1713	memcpy (names + namesoffs, name, len);
		1714
		1715	if (dents)
		1716	{
		1717	struct eio_dirent *ent;
		1718
		1719	if (ecb_expect_false (dentoffs == dentalloc))
		1720	{
		1721	dentalloc *= 2;
		1722	X_LOCK (wrklock);
		1723	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
		1724	X_UNLOCK (wrklock);
		1725
		1726	if (!dents)
		1727	break;
		1728	}
		1729
		1730	ent = dents + dentoffs;
		1731
		1732	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
		1733	ent->namelen = len - 1;
		1734	ent->inode = D_INO (entp);
		1735
		1736	inode_bits |= ent->inode;
		1737
		1738	switch (D_TYPE (entp))
		1739	{
		1740	default:
		1741	ent->type = EIO_DT_UNKNOWN;
		1742	flags |= EIO_READDIR_FOUND_UNKNOWN;
		1743	break;
		1744
		1745	#ifdef DT_FIFO
		1746	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
		1747	#endif
		1748	#ifdef DT_CHR
		1749	case DT_CHR: ent->type = EIO_DT_CHR; break;
		1750	#endif
		1751	#ifdef DT_MPC
		1752	case DT_MPC: ent->type = EIO_DT_MPC; break;
		1753	#endif
		1754	#ifdef DT_DIR
		1755	case DT_DIR: ent->type = EIO_DT_DIR; break;
		1756	#endif
		1757	#ifdef DT_NAM
		1758	case DT_NAM: ent->type = EIO_DT_NAM; break;
		1759	#endif
		1760	#ifdef DT_BLK
		1761	case DT_BLK: ent->type = EIO_DT_BLK; break;
		1762	#endif
		1763	#ifdef DT_MPB
		1764	case DT_MPB: ent->type = EIO_DT_MPB; break;
		1765	#endif
		1766	#ifdef DT_REG
		1767	case DT_REG: ent->type = EIO_DT_REG; break;
		1768	#endif
		1769	#ifdef DT_NWK
		1770	case DT_NWK: ent->type = EIO_DT_NWK; break;
		1771	#endif
		1772	#ifdef DT_CMP
		1773	case DT_CMP: ent->type = EIO_DT_CMP; break;
		1774	#endif
		1775	#ifdef DT_LNK
		1776	case DT_LNK: ent->type = EIO_DT_LNK; break;
		1777	#endif
		1778	#ifdef DT_SOCK
		1779	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
		1780	#endif
		1781	#ifdef DT_DOOR
		1782	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
		1783	#endif
		1784	#ifdef DT_WHT
		1785	case DT_WHT: ent->type = EIO_DT_WHT; break;
		1786	#endif
		1787	}
		1788
		1789	ent->score = 7;
		1790
		1791	if (flags & EIO_READDIR_DIRS_FIRST)
		1792	{
		1793	if (ent->type == EIO_DT_UNKNOWN)
		1794	{
		1795	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
		1796	ent->score = 1;
		1797	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
		1798	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
		1799	}
		1800	else if (ent->type == EIO_DT_DIR)
		1801	ent->score = 0;
		1802	}
		1803	}
		1804
761	memofs += len;	1805	namesoffs += len;
		1806	++dentoffs;
		1807	}
		1808
		1809	if (EIO_CANCELLED (req))
		1810	{
		1811	errno = ECANCELED;
		1812	break;
762	}	1813	}
763	}	1814	}
764
765	if (errno)
766	res = -1;
767
768	req->result = res;
769	}	1815	}
770		1816
771	/*****************************************************************************/	1817	/*****************************************************************************/
772		1818
		1819	#define ALLOC(len) \
		1820	if (!req->ptr2) \
		1821	{ \
		1822	X_LOCK (wrklock); \
		1823	req->flags |= EIO_FLAG_PTR2_FREE; \
		1824	X_UNLOCK (wrklock); \
		1825	req->ptr2 = malloc (len); \
		1826	if (!req->ptr2) \
		1827	{ \
		1828	errno = ENOMEM; \
		1829	req->result = -1; \
		1830	break; \
		1831	} \
		1832	}
		1833
773	X_THREAD_PROC (eio_proc)	1834	X_THREAD_PROC (etp_proc)
774	{	1835	{
775	eio_req *req;	1836	ETP_REQ *req;
776	struct timespec ts;	1837	struct timespec ts;
777	worker *self = (worker *)thr_arg;	1838	etp_worker *self = (etp_worker *)thr_arg;
		1839	int timeout;
778		1840
779	/* try to distribute timeouts somewhat randomly */	1841	/* try to distribute timeouts somewhat evenly */
780	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1842	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
781		1843
782	for (;;)	1844	for (;;)
783	{	1845	{
784	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1846	ts.tv_sec = 0;
785		1847
786	X_LOCK (reqlock);	1848	X_LOCK (reqlock);
787		1849
788	for (;;)	1850	for (;;)
789	{	1851	{
790	self->req = req = reqq_shift (&req_queue);	1852	self->req = req = reqq_shift (&req_queue);
791		1853
792	if (req)	1854	if (req)
793	break;	1855	break;
794		1856
		1857	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
		1858	{
		1859	X_UNLOCK (reqlock);
		1860	X_LOCK (wrklock);
		1861	--started;
		1862	X_UNLOCK (wrklock);
		1863	goto quit;
		1864	}
		1865
795	++idle;	1866	++idle;
796		1867
797	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1868	if (idle <= max_idle)
		1869	/* we are allowed to idle, so do so without any timeout */
		1870	X_COND_WAIT (reqwait, reqlock);
		1871	else
798	{	1872	{
799	if (idle > max_idle)	1873	/* initialise timeout once */
800	{	1874	if (!ts.tv_sec)
801	--idle;	1875	ts.tv_sec = time (0) + idle_timeout;
802	X_UNLOCK (reqlock);
803	X_LOCK (wrklock);
804	--started;
805	X_UNLOCK (wrklock);
806	goto quit;
807	}
808		1876
809	/* we are allowed to idle, so do so without any timeout */
810	X_COND_WAIT (reqwait, reqlock);	1877	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
811	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1878	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
812	}	1879	}
813		1880
814	--idle;	1881	--idle;
815	}	1882	}
816		1883
817	--nready;	1884	--nready;
818		1885
819	X_UNLOCK (reqlock);	1886	X_UNLOCK (reqlock);
820		1887
821	errno = 0; /* strictly unnecessary */
822
823	if (!EIO_CANCELLED (req))
824	switch (req->type)	1888	if (req->type < 0)
825	{
826	case EIO_READ: req->result = req->offs >= 0
827	? pread (req->int1, req->ptr2, req->size, req->offs)
828	: read (req->int1, req->ptr2, req->size); break;
829	case EIO_WRITE: req->result = req->offs >= 0
830	? pwrite (req->int1, req->ptr2, req->size, req->offs)
831	: write (req->int1, req->ptr2, req->size); break;
832
833	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
834	case EIO_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
835
836	case EIO_STAT: req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
837	case EIO_LSTAT: req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
838	case EIO_FSTAT: req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
839
840	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
841	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
842	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
843	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
844	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
845	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
846
847	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
848	case EIO_CLOSE: req->result = close (req->int1); break;
849	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
850	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
851	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
852	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
853	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
854	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
855	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
856	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
857	case EIO_READLINK: req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
858
859	case EIO_SYNC: req->result = 0; sync (); break;
860	case EIO_FSYNC: req->result = fsync (req->int1); break;
861	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
862
863	case EIO_READDIR: scandir_ (req, self); break;
864
865	case EIO_BUSY:
866	#ifdef _WIN32
867	Sleep (req->nv1 * 1000.);
868	#else
869	{
870	struct timeval tv;
871
872	tv.tv_sec = req->nv1;
873	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
874
875	req->result = select (0, 0, 0, 0, &tv);
876	}
877	#endif
878	break;
879
880	case EIO_UTIME:
881	case EIO_FUTIME:
882	{
883	struct timeval tv[2];
884	struct timeval *times;
885
886	if (req->nv1 != -1. || req->nv2 != -1.)
887	{
888	tv[0].tv_sec = req->nv1;
889	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
890	tv[1].tv_sec = req->nv2;
891	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
892
893	times = tv;
894	}
895	else
896	times = 0;
897
898
899	req->result = req->type == EIO_FUTIME
900	? futimes (req->int1, times)
901	: utimes (req->ptr1, times);
902	}
903
904	case EIO_GROUP:
905	case EIO_NOP:
906	break;
907
908	case EIO_QUIT:
909	goto quit;	1889	goto quit;
910		1890
911	default:	1891	ETP_EXECUTE (self, req);
912	req->result = -1;
913	break;
914	}
915
916	req->errorno = errno;
917		1892
918	X_LOCK (reslock);	1893	X_LOCK (reslock);
919		1894
920	++npending;	1895	++npending;
921		1896
922	if (!reqq_push (&res_queue, req) && want_poll_cb)	1897	if (!reqq_push (&res_queue, req) && want_poll_cb)
923	want_poll_cb ();	1898	want_poll_cb ();
924		1899
925	self->req = 0;	1900	self->req = 0;
926	worker_clear (self);	1901	etp_worker_clear (self);
927		1902
928	X_UNLOCK (reslock);	1903	X_UNLOCK (reslock);
929	}	1904	}
930		1905
931	quit:	1906	quit:
932	X_LOCK (wrklock);	1907	X_LOCK (wrklock);
933	worker_free (self);	1908	etp_worker_free (self);
934	X_UNLOCK (wrklock);	1909	X_UNLOCK (wrklock);
935		1910
936	return 0;	1911	return 0;
937	}	1912	}
938		1913
939	/*****************************************************************************/	1914	/*****************************************************************************/
940		1915
941	static void eio_atfork_prepare (void)	1916	int ecb_cold
		1917	eio_init (void (*want_poll)(void), void (*done_poll)(void))
942	{	1918	{
943	X_LOCK (wrklock);	1919	return etp_init (want_poll, done_poll);
944	X_LOCK (reqlock);
945	X_LOCK (reslock);
946	#if !HAVE_PREADWRITE
947	X_LOCK (preadwritelock);
948	#endif
949	#if !HAVE_READDIR_R
950	X_LOCK (readdirlock);
951	#endif
952	}	1920	}
953		1921
954	static void eio_atfork_parent (void)	1922	ecb_inline void
		1923	eio_api_destroy (eio_req *req)
955	{	1924	{
956	#if !HAVE_READDIR_R	1925	free (req);
957	X_UNLOCK (readdirlock);
958	#endif
959	#if !HAVE_PREADWRITE
960	X_UNLOCK (preadwritelock);
961	#endif
962	X_UNLOCK (reslock);
963	X_UNLOCK (reqlock);
964	X_UNLOCK (wrklock);
965	}	1926	}
966		1927
967	static void eio_atfork_child (void)	1928	#define REQ(rtype) \
968	{	1929	eio_req *req; \
969	eio_req *prv;	1930	\
		1931	req = (eio_req *)calloc (1, sizeof *req); \
		1932	if (!req) \
		1933	return 0; \
		1934	\
		1935	req->type = rtype; \
		1936	req->pri = pri; \
		1937	req->finish = cb; \
		1938	req->data = data; \
		1939	req->destroy = eio_api_destroy;
970		1940
971	while (prv = reqq_shift (&req_queue))	1941	#define SEND eio_submit (req); return req
972	eio_destroy (prv);
973		1942
974	while (prv = reqq_shift (&res_queue))	1943	#define PATH \
975	eio_destroy (prv);	1944	req->flags |= EIO_FLAG_PTR1_FREE; \
		1945	req->ptr1 = strdup (path); \
		1946	if (!req->ptr1) \
		1947	{ \
		1948	eio_api_destroy (req); \
		1949	return 0; \
		1950	}
976		1951
977	while (wrk_first.next != &wrk_first)	1952	static void
		1953	eio_execute (etp_worker *self, eio_req *req)
		1954	{
		1955	if (ecb_expect_false (EIO_CANCELLED (req)))
978	{	1956	{
979	worker *wrk = wrk_first.next;	1957	req->result = -1;
		1958	req->errorno = ECANCELED;
		1959	return;
		1960	}
980		1961
981	if (wrk->req)	1962	switch (req->type)
982	eio_destroy (wrk->req);
983
984	worker_clear (wrk);
985	worker_free (wrk);
986	}	1963	{
		1964	case EIO_READ: ALLOC (req->size);
		1965	req->result = req->offs >= 0
		1966	? pread (req->int1, req->ptr2, req->size, req->offs)
		1967	: read (req->int1, req->ptr2, req->size); break;
		1968	case EIO_WRITE: req->result = req->offs >= 0
		1969	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		1970	: write (req->int1, req->ptr2, req->size); break;
987		1971
988	started = 0;	1972	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
989	idle = 0;	1973	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
990	nreqs = 0;
991	nready = 0;
992	npending = 0;
993		1974
994	eio_atfork_parent ();	1975	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
995	}	1976	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1977	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1978	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1979	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1980	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
996		1981
997	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1982	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
998	{	1983	req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
999	want_poll_cb = want_poll;	1984	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
1000	done_poll_cb = done_poll;	1985	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
1001		1986
		1987	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1988	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1989	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
		1990	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
		1991	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1992	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		1993
		1994	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
		1995	case EIO_CLOSE: req->result = close (req->int1); break;
		1996	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		1997	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		1998	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		1999	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		2000	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		2001	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		2002	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		2003	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
		2004
		2005	case EIO_REALPATH: eio__realpath (req, self); break;
		2006
		2007	case EIO_READLINK: ALLOC (PATH_MAX);
		2008	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
		2009
		2010	case EIO_SYNC: req->result = 0; sync (); break;
		2011	case EIO_FSYNC: req->result = fsync (req->int1); break;
		2012	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		2013	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
		2014	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
		2015	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
		2016	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
		2017	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		2018	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
		2019
		2020	case EIO_READDIR: eio__scandir (req, self); break;
		2021
		2022	case EIO_BUSY:
1002	#ifdef _WIN32	2023	#ifdef _WIN32
1003	X_MUTEX_CHECK (wrklock);	2024	Sleep (req->nv1 * 1e3);
1004	X_MUTEX_CHECK (reslock);	2025	#else
1005	X_MUTEX_CHECK (reqlock);	2026	{
1006	X_MUTEX_CHECK (reqwait);	2027	struct timeval tv;
1007	X_MUTEX_CHECK (preadwritelock);
1008	X_MUTEX_CHECK (readdirlock);
1009		2028
1010	X_COND_CHECK (reqwait);	2029	tv.tv_sec = req->nv1;
1011	#endif	2030	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6;
1012		2031
1013	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);	2032	req->result = select (0, 0, 0, 0, &tv);
1014	}	2033	}
		2034	#endif
		2035	break;
1015		2036
1016	#if 0	2037	case EIO_UTIME:
		2038	case EIO_FUTIME:
		2039	{
		2040	struct timeval tv[2];
		2041	struct timeval *times;
1017		2042
		2043	if (req->nv1 != -1. || req->nv2 != -1.)
		2044	{
		2045	tv[0].tv_sec = req->nv1;
		2046	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		2047	tv[1].tv_sec = req->nv2;
		2048	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		2049
		2050	times = tv;
		2051	}
		2052	else
		2053	times = 0;
		2054
		2055	req->result = req->type == EIO_FUTIME
		2056	? futimes (req->int1, times)
		2057	: utimes (req->ptr1, times);
		2058	}
		2059	break;
		2060
		2061	case EIO_GROUP:
		2062	abort (); /* handled in eio_request */
		2063
		2064	case EIO_NOP:
		2065	req->result = 0;
		2066	break;
		2067
		2068	case EIO_CUSTOM:
		2069	req->feed (req);
		2070	break;
		2071
		2072	default:
		2073	errno = ENOSYS;
		2074	req->result = -1;
		2075	break;
		2076	}
		2077
		2078	req->errorno = errno;
		2079	}
		2080
		2081	#ifndef EIO_NO_WRAPPERS
		2082
		2083	eio_req *eio_nop (int pri, eio_cb cb, void *data)
		2084	{
		2085	REQ (EIO_NOP); SEND;
		2086	}
		2087
		2088	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
		2089	{
		2090	REQ (EIO_BUSY); req->nv1 = delay; SEND;
		2091	}
		2092
1018	eio_req *eio_fsync (int fd, eio_cb cb);	2093	eio_req *eio_sync (int pri, eio_cb cb, void *data)
		2094	{
		2095	REQ (EIO_SYNC); SEND;
		2096	}
		2097
		2098	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		2099	{
		2100	REQ (EIO_FSYNC); req->int1 = fd; SEND;
		2101	}
		2102
		2103	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2104	{
		2105	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2106	}
		2107
		2108	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2109	{
		2110	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2111	}
		2112
		2113	eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data)
		2114	{
		2115	REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND;
		2116	}
		2117
		2118	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
		2119	{
		2120	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
		2121	}
		2122
		2123	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		2124	{
		2125	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		2126	}
		2127
		2128	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
		2129	{
		2130	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
		2131	}
		2132
1019	eio_req *eio_fdatasync (int fd, eio_cb cb);	2133	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1020	eio_req *eio_dupclose (int fd, eio_cb cb);	2134	{
		2135	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
		2136	}
		2137
		2138	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		2139	{
		2140	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		2141	}
		2142
1021	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb);	2143	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
1022	eio_req *eio_read (int fd, off_t offs, size_t length, char *data, eio_cb cb);	2144	{
1023	eio_req *eio_write (int fd, off_t offs, size_t length, char *data, eio_cb cb);	2145	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
1024	eio_req *eio_fstat (int fd, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */	2146	}
		2147
		2148	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		2149	{
		2150	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		2151	}
		2152
		2153	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		2154	{
		2155	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		2156	}
		2157
		2158	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
		2159	{
		2160	REQ (EIO_FSTAT); req->int1 = fd; SEND;
		2161	}
		2162
		2163	eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data)
		2164	{
		2165	REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
		2166	}
		2167
1025	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb);	2168	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
		2169	{
		2170	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
		2171	}
		2172
1026	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb);	2173	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
		2174	{
		2175	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
		2176	}
		2177
1027	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb);	2178	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
		2179	{
		2180	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
		2181	}
		2182
1028	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb);	2183	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
		2184	{
		2185	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		2186	}
		2187
1029	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb);	2188	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
		2189	{
		2190	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
		2191	}
		2192
1030	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb);	2193	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
		2194	{
		2195	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
		2196	}
		2197
1031	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb);	2198	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
1032	eio_req *eio_readlink (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */	2199	{
1033	eio_req *eio_stat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */	2200	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
1034	eio_req *eio_lstat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */	2201	}
		2202
1035	eio_req *eio_utime (const char *path, double atime, double mtime, eio_cb cb);	2203	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
		2204	{
		2205	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
		2206	}
		2207
1036	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb);	2208	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
1037	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb);	2209	{
1038	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb);	2210	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
		2211	}
		2212
1039	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb);	2213	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
		2214	{
		2215	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		2216	}
		2217
		2218	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
		2219	{
		2220	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
		2221	}
		2222
		2223	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
		2224	{
		2225	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
		2226	}
		2227
		2228	static eio_req *
		2229	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
		2230	{
		2231	REQ (type); PATH; SEND;
		2232	}
		2233
		2234	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		2235	{
		2236	return eio__1path (EIO_READLINK, path, pri, cb, data);
		2237	}
		2238
		2239	eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
		2240	{
		2241	return eio__1path (EIO_REALPATH, path, pri, cb, data);
		2242	}
		2243
		2244	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		2245	{
		2246	return eio__1path (EIO_STAT, path, pri, cb, data);
		2247	}
		2248
		2249	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		2250	{
		2251	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		2252	}
		2253
		2254	eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data)
		2255	{
		2256	return eio__1path (EIO_STATVFS, path, pri, cb, data);
		2257	}
		2258
1040	eio_req *eio_unlink (const char *path, eio_cb cb);	2259	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		2260	{
		2261	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		2262	}
		2263
1041	eio_req *eio_rmdir (const char *path, eio_cb cb);	2264	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
1042	eio_req *eio_readdir (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */	2265	{
		2266	return eio__1path (EIO_RMDIR, path, pri, cb, data);
		2267	}
		2268
		2269	eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data)
		2270	{
		2271	REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
		2272	}
		2273
1043	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb);	2274	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1044	eio_req *eio_busy (double delay, eio_cb cb); /* ties a thread for this long, simulating busyness */	2275	{
1045	eio_req *eio_nop (eio_cb cb); /* does nothing except go through the whole process */	2276	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND;
		2277	}
		2278
		2279	static eio_req *
		2280	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2281	{
		2282	REQ (type); PATH;
		2283
		2284	req->flags |= EIO_FLAG_PTR2_FREE;
		2285	req->ptr2 = strdup (new_path);
		2286	if (!req->ptr2)
		2287	{
		2288	eio_api_destroy (req);
		2289	return 0;
		2290	}
		2291
		2292	SEND;
		2293	}
		2294
		2295	eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2296	{
		2297	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
		2298	}
		2299
		2300	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2301	{
		2302	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
		2303	}
		2304
		2305	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2306	{
		2307	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
		2308	}
		2309
		2310	eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
		2311	{
		2312	REQ (EIO_CUSTOM); req->feed = execute; SEND;
		2313	}
		2314
		2315	#endif
		2316
		2317	eio_req *eio_grp (eio_cb cb, void *data)
		2318	{
		2319	const int pri = EIO_PRI_MAX;
		2320
		2321	REQ (EIO_GROUP); SEND;
		2322	}
		2323
		2324	#undef REQ
		2325	#undef PATH
		2326	#undef SEND
		2327
		2328	/*****************************************************************************/
		2329	/* grp functions */
		2330
1046	void	2331	void
1047	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1048	PROTOTYPE: $$$;$
1049	PPCODE:
1050	{
1051	dREQ;
1052
1053	req->type = EIO_OPEN;
1054	req->sv1 = newSVsv (pathname);
1055	req->ptr1 = SvPVbyte_nolen (req->sv1);
1056	req->int1 = flags;
1057	req->int2 = mode;
1058
1059	EIO_SEND;
1060	}
1061
1062	void
1063	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1064	PROTOTYPE: $;$
1065	ALIAS:
1066	aio_fsync = EIO_FSYNC
1067	aio_fdatasync = EIO_FDATASYNC
1068	PPCODE:
1069	{
1070	dREQ;
1071
1072	req->type = ix;
1073	req->sv1 = newSVsv (fh);
1074	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1075
1076	EIO_SEND (req);
1077	}
1078
1079	void
1080	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1081	PROTOTYPE: $;$
1082	PPCODE:
1083	{
1084	dREQ;
1085
1086	req->type = EIO_CLOSE;
1087	req->sv1 = newSVsv (fh);
1088	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1089
1090	EIO_SEND (req);
1091	}
1092
1093	void
1094	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1095	ALIAS:
1096	aio_read = EIO_READ
1097	aio_write = EIO_WRITE
1098	PROTOTYPE: $$$$$;$
1099	PPCODE:
1100	{
1101	STRLEN svlen;
1102	char *svptr = SvPVbyte (data, svlen);
1103	UV len = SvUV (length);
1104
1105	SvUPGRADE (data, SVt_PV);
1106	SvPOK_on (data);
1107
1108	if (dataoffset < 0)
1109	dataoffset += svlen;
1110
1111	if (dataoffset < 0 || dataoffset > svlen)
1112	croak ("dataoffset outside of data scalar");
1113
1114	if (ix == EIO_WRITE)
1115	{
1116	/* write: check length and adjust. */
1117	if (!SvOK (length) || len + dataoffset > svlen)
1118	len = svlen - dataoffset;
1119	}
1120	else
1121	{
1122	/* read: grow scalar as necessary */
1123	svptr = SvGROW (data, len + dataoffset + 1);
1124	}
1125
1126	if (len < 0)
1127	croak ("length must not be negative");
1128
1129	{
1130	dREQ;
1131
1132	req->type = ix;
1133	req->sv1 = newSVsv (fh);
1134	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1135	: IoOFP (sv_2io (fh)));
1136	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1137	req->size = len;
1138	req->sv2 = SvREFCNT_inc (data);
1139	req->ptr2 = (char *)svptr + dataoffset;
1140	req->stroffset = dataoffset;
1141
1142	if (!SvREADONLY (data))
1143	{
1144	SvREADONLY_on (data);
1145	req->flags |= FLAG_SV2_RO_OFF;
1146	}
1147
1148	EIO_SEND;
1149	}
1150	}
1151
1152	void
1153	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1154	PROTOTYPE: $$;$
1155	PPCODE:
1156	{
1157	SV *data;
1158	dREQ;
1159
1160	data = newSV (NAME_MAX);
1161	SvPOK_on (data);
1162
1163	req->type = EIO_READLINK;
1164	req->sv1 = newSVsv (path);
1165	req->ptr1 = SvPVbyte_nolen (req->sv1);
1166	req->sv2 = data;
1167	req->ptr2 = SvPVbyte_nolen (data);
1168
1169	EIO_SEND;
1170	}
1171
1172	void
1173	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1174	PROTOTYPE: $$$$;$
1175	PPCODE:
1176	{
1177	dREQ;
1178
1179	req->type = EIO_SENDFILE;
1180	req->sv1 = newSVsv (out_fh);
1181	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1182	req->sv2 = newSVsv (in_fh);
1183	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1184	req->offs = SvVAL64 (in_offset);
1185	req->size = length;
1186
1187	EIO_SEND;
1188	}
1189
1190	void
1191	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1192	PROTOTYPE: $$$;$
1193	PPCODE:
1194	{
1195	dREQ;
1196
1197	req->type = EIO_READAHEAD;
1198	req->sv1 = newSVsv (fh);
1199	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1200	req->offs = SvVAL64 (offset);
1201	req->size = length;
1202
1203	EIO_SEND;
1204	}
1205
1206	void
1207	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1208	ALIAS:
1209	aio_stat = EIO_STAT
1210	aio_lstat = EIO_LSTAT
1211	PPCODE:
1212	{
1213	dREQ;
1214
1215	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1216	if (!req->ptr2)
1217	{
1218	req_destroy (req);
1219	croak ("out of memory during aio_stat statdata allocation");
1220	}
1221
1222	req->flags |= FLAG_PTR2_FREE;
1223	req->sv1 = newSVsv (fh_or_path);
1224
1225	if (SvPOK (fh_or_path))
1226	{
1227	req->type = ix;
1228	req->ptr1 = SvPVbyte_nolen (req->sv1);
1229	}
1230	else
1231	{
1232	req->type = EIO_FSTAT;
1233	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1234	}
1235
1236	EIO_SEND;
1237	}
1238
1239	void
1240	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1241	PPCODE:
1242	{
1243	dREQ;
1244
1245	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1246	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1247	req->sv1 = newSVsv (fh_or_path);
1248
1249	if (SvPOK (fh_or_path))
1250	{
1251	req->type = EIO_UTIME;
1252	req->ptr1 = SvPVbyte_nolen (req->sv1);
1253	}
1254	else
1255	{
1256	req->type = EIO_FUTIME;
1257	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1258	}
1259
1260	EIO_SEND;
1261	}
1262
1263	void
1264	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1265	PPCODE:
1266	{
1267	dREQ;
1268
1269	req->sv1 = newSVsv (fh_or_path);
1270	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1271
1272	if (SvPOK (fh_or_path))
1273	{
1274	req->type = EIO_TRUNCATE;
1275	req->ptr1 = SvPVbyte_nolen (req->sv1);
1276	}
1277	else
1278	{
1279	req->type = EIO_FTRUNCATE;
1280	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1281	}
1282
1283	EIO_SEND;
1284	}
1285
1286	void
1287	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1288	ALIAS:
1289	aio_chmod = EIO_CHMOD
1290	aio_fchmod = EIO_FCHMOD
1291	aio_mkdir = EIO_MKDIR
1292	PPCODE:
1293	{
1294	dREQ;
1295
1296	req->type = type;
1297	req->int2 = mode;
1298	req->sv1 = newSVsv (fh_or_path);
1299
1300	if (ix == EIO_FCHMOD)
1301	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1302	else
1303	req->ptr1 = SvPVbyte_nolen (req->sv1);
1304
1305	EIO_SEND;
1306	}
1307
1308	void
1309	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1310	PPCODE:
1311	{
1312	dREQ;
1313
1314	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1315	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1316	req->sv1 = newSVsv (fh_or_path);
1317
1318	if (SvPOK (fh_or_path))
1319	{
1320	req->type = EIO_CHOWN;
1321	req->ptr1 = SvPVbyte_nolen (req->sv1);
1322	}
1323	else
1324	{
1325	req->type = EIO_FCHOWN;
1326	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1327	}
1328
1329	EIO_SEND;
1330	}
1331
1332	void
1333	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1334	ALIAS:
1335	aio_unlink = EIO_UNLINK
1336	aio_rmdir = EIO_RMDIR
1337	aio_readdir = EIO_READDIR
1338	PPCODE:
1339	{
1340	dREQ;
1341
1342	req->type = ix;
1343	req->sv1 = newSVsv (pathname);
1344	req->ptr1 = SvPVbyte_nolen (req->sv1);
1345
1346	EIO_SEND;
1347	}
1348
1349	void
1350	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1351	ALIAS:
1352	aio_link = EIO_LINK
1353	aio_symlink = EIO_SYMLINK
1354	aio_rename = EIO_RENAME
1355	PPCODE:
1356	{
1357	dREQ;
1358
1359	req->type = ix;
1360	req->sv1 = newSVsv (oldpath);
1361	req->ptr1 = SvPVbyte_nolen (req->sv1);
1362	req->sv2 = newSVsv (newpath);
1363	req->ptr2 = SvPVbyte_nolen (req->sv2);
1364
1365	EIO_SEND;
1366	}
1367
1368	void
1369	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1370	PPCODE:
1371	{
1372	dREQ;
1373
1374	req->type = EIO_MKNOD;
1375	req->sv1 = newSVsv (pathname);
1376	req->ptr1 = SvPVbyte_nolen (req->sv1);
1377	req->int2 = (mode_t)mode;
1378	req->offs = dev;
1379
1380	EIO_SEND;
1381	}
1382
1383	void
1384	aio_busy (double delay, SV *callback=&PL_sv_undef)
1385	PPCODE:
1386	{
1387	dREQ;
1388
1389	req->type = EIO_BUSY;
1390	req->nv1 = delay < 0. ? 0. : delay;
1391
1392	EIO_SEND;
1393	}
1394
1395	void
1396	aio_group (SV *callback=&PL_sv_undef)
1397	PROTOTYPE: ;$
1398	PPCODE:
1399	{
1400	dREQ;
1401
1402	req->type = EIO_GROUP;
1403
1404	req_send (req);
1405	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1406	}
1407
1408	void
1409	aio_nop (SV *callback=&PL_sv_undef)
1410	ALIAS:
1411	aio_nop = EIO_NOP
1412	aio_sync = EIO_SYNC
1413	PPCODE:
1414	{
1415	dREQ;
1416
1417	#endif
1418
1419	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	2332	eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1420	{	2333	{
1421	grp->int2 = limit;	2334	grp->int2 = limit;
1422	grp->feed = feed;	2335	grp->feed = feed;
1423		2336
1424	grp_try_feed (grp);	2337	grp_try_feed (grp);
1425	}	2338	}
1426		2339
		2340	void
1427	void eio_grp_limit (eio_req *grp, int limit)	2341	eio_grp_limit (eio_req *grp, int limit)
1428	{	2342	{
1429	grp->int2 = limit;	2343	grp->int2 = limit;
1430		2344
1431	grp_try_feed (grp);	2345	grp_try_feed (grp);
1432	}	2346	}
1433		2347
		2348	void
1434	void eio_grp_add (eio_req *grp, eio_req *req)	2349	eio_grp_add (eio_req *grp, eio_req *req)
1435	{	2350	{
1436	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2351	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
		2352
		2353	grp->flags |= EIO_FLAG_GROUPADD;
1437		2354
1438	++grp->size;	2355	++grp->size;
1439	req->grp = grp;	2356	req->grp = grp;
1440		2357
1441	req->grp_prev = 0;	2358	req->grp_prev = 0;
…		…
1445	grp->grp_first->grp_prev = req;	2362	grp->grp_first->grp_prev = req;
1446		2363
1447	grp->grp_first = req;	2364	grp->grp_first = req;
1448	}	2365	}
1449		2366
		2367	/*****************************************************************************/
		2368	/* misc garbage */
1450		2369
		2370	ssize_t
		2371	eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		2372	{
		2373	etp_worker wrk;
		2374	ssize_t ret;
		2375
		2376	wrk.dbuf = 0;
		2377
		2378	ret = eio__sendfile (ofd, ifd, offset, count, &wrk);
		2379
		2380	if (wrk.dbuf)
		2381	free (wrk.dbuf);
		2382
		2383	return ret;
		2384	}
		2385

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