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Comparing libeio/eio.c (file contents):
Revision 1.4 by root, Sun May 11 00:10:15 2008 UTC vs.
Revision 1.89 by root, Thu Jul 14 22:36:17 2011 UTC

		1	/*
		2	* libeio implementation
		3	*
		4	* Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libeio@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without modifica-
		8	* tion, are permitted provided that the following conditions are met:
		9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*
		28	* Alternatively, the contents of this file may be used under the terms of
		29	* the GNU General Public License ("GPL") version 2 or any later version,
		30	* in which case the provisions of the GPL are applicable instead of
		31	* the above. If you wish to allow the use of your version of this file
		32	* only under the terms of the GPL and not to allow others to use your
		33	* version of this file under the BSD license, indicate your decision
		34	* by deleting the provisions above and replace them with the notice
		35	* and other provisions required by the GPL. If you do not delete the
		36	* provisions above, a recipient may use your version of this file under
		37	* either the BSD or the GPL.
		38	*/
		39
		40	#ifndef _WIN32
		41	# include "config.h"
		42	#endif
		43
1	#include "eio.h"	44	#include "eio.h"
		45	#include "ecb.h"
		46
		47	#ifdef EIO_STACKSIZE
		48	# define XTHREAD_STACKSIZE EIO_STACKSIZE
		49	#endif
2	#include "xthread.h"	50	#include "xthread.h"
3		51
4	#include <errno.h>	52	#include <errno.h>
5	#include <stddef.h>	53	#include <stddef.h>
6	#include <stdlib.h>	54	#include <stdlib.h>
…		…
8	#include <errno.h>	56	#include <errno.h>
9	#include <sys/types.h>	57	#include <sys/types.h>
10	#include <sys/stat.h>	58	#include <sys/stat.h>
11	#include <limits.h>	59	#include <limits.h>
12	#include <fcntl.h>	60	#include <fcntl.h>
13	#include <sched.h>	61	#include <assert.h>
		62
		63	/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */
		64	/* intptr_t only comes from stdint.h, says idiot openbsd coder */
		65	#if HAVE_STDINT_H
		66	# include <stdint.h>
		67	#endif
		68
		69	#ifndef ECANCELED
		70	# define ECANCELED EDOM
		71	#endif
		72
		73	static void eio_destroy (eio_req *req);
14		74
15	#ifndef EIO_FINISH	75	#ifndef EIO_FINISH
16	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	76	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
17	#endif	77	#endif
18		78
…		…
22		82
23	#ifndef EIO_FEED	83	#ifndef EIO_FEED
24	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)	84	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)
25	#endif	85	#endif
26		86
		87	#ifndef EIO_FD_TO_WIN32_HANDLE
		88	# define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		89	#endif
		90	#ifndef EIO_WIN32_HANDLE_TO_FD
		91	# define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		92	#endif
		93
		94	#define EIO_ERRNO(errval,retval) ((errno = errval), retval)
		95
		96	#define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1)
		97
27	#ifdef _WIN32	98	#ifdef _WIN32
28		99
29	/*doh*/	100	#define PAGESIZE 4096 /* GetSystemInfo? */
		101
		102	#ifdef EIO_STRUCT_STATI64
		103	#define stat(path,buf) _stati64 (path,buf)
		104	#define fstat(fd,buf) _fstati64 (path,buf)
		105	#endif
		106	#define lstat(path,buf) stat (path,buf)
		107	#define fsync(fd) (FlushFileBuffers (EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
		108	#define mkdir(path,mode) _mkdir (path)
		109	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
		110
		111	#define chown(path,uid,gid) EIO_ENOSYS ()
		112	#define fchown(fd,uid,gid) EIO_ENOSYS ()
		113	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
		114	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
		115	#define mknod(path,mode,dev) EIO_ENOSYS ()
		116	#define sync() EIO_ENOSYS ()
		117
		118	/* we could even stat and see if it exists */
		119	static int
		120	symlink (const char *old, const char *neu)
		121	{
		122	if (CreateSymbolicLink (neu, old, 1))
		123	return 0;
		124
		125	if (CreateSymbolicLink (neu, old, 0))
		126	return 0;
		127
		128	return EIO_ERRNO (ENOENT, -1);
		129	}
30		130
31	#else	131	#else
32		132
33	# include "config.h"
34	# include <sys/time.h>	133	#include <sys/time.h>
35	# include <sys/select.h>	134	#include <sys/select.h>
		135	#include <sys/statvfs.h>
36	# include <unistd.h>	136	#include <unistd.h>
37	# include <utime.h>	137	#include <utime.h>
38	# include <signal.h>	138	#include <signal.h>
39	# include <dirent.h>	139	#include <dirent.h>
40		140
		141	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		142	#include <sys/mman.h>
		143	#endif
		144
		145	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
		146	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
		147	#define _DIRENT_HAVE_D_TYPE /* sigh */
		148	#define D_INO(de) (de)->d_fileno
		149	#define D_NAMLEN(de) (de)->d_namlen
		150	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
		151	#define D_INO(de) (de)->d_ino
		152	#endif
		153
		154	#ifdef _D_EXACT_NAMLEN
		155	#undef D_NAMLEN
		156	#define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
		157	#endif
		158
		159	#ifdef _DIRENT_HAVE_D_TYPE
		160	#define D_TYPE(de) (de)->d_type
		161	#endif
		162
41	# ifndef EIO_STRUCT_DIRENT	163	#ifndef EIO_STRUCT_DIRENT
42	# define EIO_STRUCT_DIRENT struct dirent	164	#define EIO_STRUCT_DIRENT struct dirent
		165	#endif
		166
43	# endif	167	#endif
44
45	#endif
46
47	# ifndef EIO_STRUCT_STAT
48	# define EIO_STRUCT_STAT struct stat
49	# endif
50		168
51	#if HAVE_SENDFILE	169	#if HAVE_SENDFILE
52	# if __linux	170	# if __linux
53	# include <sys/sendfile.h>	171	# include <sys/sendfile.h>
54	# elif __freebsd	172	# elif __FreeBSD__ || defined __APPLE__
55	# include <sys/socket.h>	173	# include <sys/socket.h>
56	# include <sys/uio.h>	174	# include <sys/uio.h>
57	# elif __hpux	175	# elif __hpux
58	# include <sys/socket.h>	176	# include <sys/socket.h>
59	# elif __solaris /* not yet */	177	# elif __solaris
60	# include <sys/sendfile.h>	178	# include <sys/sendfile.h>
61	# else	179	# else
62	# error sendfile support requested but not available	180	# error sendfile support requested but not available
63	# endif	181	# endif
64	#endif	182	#endif
65		183
66	/* number of seconds after which an idle threads exit */	184	#ifndef D_TYPE
67	#define IDLE_TIMEOUT 10	185	# define D_TYPE(de) 0
		186	#endif
		187	#ifndef D_INO
		188	# define D_INO(de) 0
		189	#endif
		190	#ifndef D_NAMLEN
		191	# define D_NAMLEN(de) strlen ((de)->d_name)
		192	#endif
68		193
69	/* used for struct dirent, AIX doesn't provide it */	194	/* used for struct dirent, AIX doesn't provide it */
70	#ifndef NAME_MAX	195	#ifndef NAME_MAX
71	# define NAME_MAX 4096	196	# define NAME_MAX 4096
72	#endif	197	#endif
73		198
		199	/* used for readlink etc. */
		200	#ifndef PATH_MAX
		201	# define PATH_MAX 4096
		202	#endif
		203
74	/* buffer size for various temporary buffers */	204	/* buffer size for various temporary buffers */
75	#define EIO_BUFSIZE 65536	205	#define EIO_BUFSIZE 65536
76		206
77	#define dBUF \	207	#define dBUF \
78	char *eio_buf; \	208	char *eio_buf; \
79	X_LOCK (wrklock); \	209	ETP_WORKER_LOCK (self); \
80	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	210	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \
81	X_UNLOCK (wrklock); \	211	ETP_WORKER_UNLOCK (self); \
		212	errno = ENOMEM; \
82	if (!eio_buf) \	213	if (!eio_buf) \
83	return -1;	214	return -1;
84		215
85	#define EIO_TICKS ((1000000 + 1023) >> 10)	216	#define EIO_TICKS ((1000000 + 1023) >> 10)
86		217
		218	#define ETP_PRI_MIN EIO_PRI_MIN
		219	#define ETP_PRI_MAX EIO_PRI_MAX
		220
		221	struct etp_worker;
		222
		223	#define ETP_REQ eio_req
		224	#define ETP_DESTROY(req) eio_destroy (req)
		225	static int eio_finish (eio_req *req);
		226	#define ETP_FINISH(req) eio_finish (req)
		227	static void eio_execute (struct etp_worker *self, eio_req *req);
		228	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		229
		230	#define ETP_WORKER_CLEAR(req) \
		231	if (wrk->dbuf) \
		232	{ \
		233	free (wrk->dbuf); \
		234	wrk->dbuf = 0; \
		235	} \
		236	\
		237	if (wrk->dirp) \
		238	{ \
		239	closedir (wrk->dirp); \
		240	wrk->dirp = 0; \
		241	}
		242
		243	#define ETP_WORKER_COMMON \
		244	void *dbuf; \
		245	DIR *dirp;
		246
		247	/*****************************************************************************/
		248
		249	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		250
		251	/* calculate time difference in ~1/EIO_TICKS of a second */
		252	ecb_inline int
		253	tvdiff (struct timeval *tv1, struct timeval *tv2)
		254	{
		255	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		256	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		257	}
		258
		259	static unsigned int started, idle, wanted = 4;
		260
87	static void (*want_poll_cb) (void);	261	static void (*want_poll_cb) (void);
88	static void (*done_poll_cb) (void);	262	static void (*done_poll_cb) (void);
89		263
90	static unsigned int max_poll_time = 0;	264	static unsigned int max_poll_time; /* reslock */
91	static unsigned int max_poll_reqs = 0;	265	static unsigned int max_poll_reqs; /* reslock */
92		266
93	/* calculcate time difference in ~1/EIO_TICKS of a second */	267	static volatile unsigned int nreqs; /* reqlock */
94	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	268	static volatile unsigned int nready; /* reqlock */
95	{	269	static volatile unsigned int npending; /* reqlock */
96	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	270	static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
97	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);	271	static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
98	}
99		272
100	static unsigned int started, idle, wanted;	273	static xmutex_t wrklock;
		274	static xmutex_t reslock;
		275	static xmutex_t reqlock;
		276	static xcond_t reqwait;
		277
		278	#if !HAVE_PREADWRITE
		279	/*
		280	* make our pread/pwrite emulation safe against themselves, but not against
		281	* normal read/write by using a mutex. slows down execution a lot,
		282	* but that's your problem, not mine.
		283	*/
		284	static xmutex_t preadwritelock = X_MUTEX_INIT;
		285	#endif
		286
		287	typedef struct etp_worker
		288	{
		289	/* locked by wrklock */
		290	struct etp_worker *prev, *next;
		291
		292	xthread_t tid;
		293
		294	/* locked by reslock, reqlock or wrklock */
		295	ETP_REQ *req; /* currently processed request */
		296
		297	ETP_WORKER_COMMON
		298	} etp_worker;
		299
		300	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
		301
		302	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		303	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
101		304
102	/* worker threads management */	305	/* worker threads management */
103	static mutex_t wrklock = X_MUTEX_INIT;
104		306
105	typedef struct worker {	307	static void ecb_cold
106	/* locked by wrklock */
107	struct worker *prev, *next;
108
109	thread_t tid;
110
111	/* locked by reslock, reqlock or wrklock */
112	eio_req *req; /* currently processed request */
113	void *dbuf;
114	DIR *dirp;
115	} worker;
116
117	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
118
119	static void worker_clear (worker *wrk)	308	etp_worker_clear (etp_worker *wrk)
120	{	309	{
121	if (wrk->dirp)	310	ETP_WORKER_CLEAR (wrk);
122	{
123	closedir (wrk->dirp);
124	wrk->dirp = 0;
125	}
126
127	if (wrk->dbuf)
128	{
129	free (wrk->dbuf);
130	wrk->dbuf = 0;
131	}
132	}	311	}
133		312
134	static void worker_free (worker *wrk)	313	static void ecb_cold
		314	etp_worker_free (etp_worker *wrk)
135	{	315	{
136	wrk->next->prev = wrk->prev;	316	wrk->next->prev = wrk->prev;
137	wrk->prev->next = wrk->next;	317	wrk->prev->next = wrk->next;
138		318
139	free (wrk);	319	free (wrk);
140	}	320	}
141		321
142	static volatile unsigned int nreqs, nready, npending;	322	static unsigned int
143	static volatile unsigned int max_idle = 4;	323	etp_nreqs (void)
144
145	static mutex_t reslock = X_MUTEX_INIT;
146	static mutex_t reqlock = X_MUTEX_INIT;
147	static cond_t reqwait = X_COND_INIT;
148
149	unsigned int eio_nreqs (void)
150	{	324	{
		325	int retval;
		326	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		327	retval = nreqs;
		328	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
151	return nreqs;	329	return retval;
152	}	330	}
153		331
154	unsigned int eio_nready (void)	332	static unsigned int
		333	etp_nready (void)
155	{	334	{
156	unsigned int retval;	335	unsigned int retval;
157		336
158	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	337	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
159	retval = nready;	338	retval = nready;
160	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	339	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
161		340
162	return retval;	341	return retval;
163	}	342	}
164		343
165	unsigned int eio_npending (void)	344	static unsigned int
		345	etp_npending (void)
166	{	346	{
167	unsigned int retval;	347	unsigned int retval;
168		348
169	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	349	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
170	retval = npending;	350	retval = npending;
171	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	351	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
172		352
173	return retval;	353	return retval;
174	}	354	}
175		355
176	unsigned int eio_nthreads (void)	356	static unsigned int
		357	etp_nthreads (void)
177	{	358	{
178	unsigned int retval;	359	unsigned int retval;
179		360
180	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	361	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
181	retval = started;	362	retval = started;
…		…
188	* a somewhat faster data structure might be nice, but	369	* a somewhat faster data structure might be nice, but
189	* with 8 priorities this actually needs <20 insns	370	* with 8 priorities this actually needs <20 insns
190	* per shift, the most expensive operation.	371	* per shift, the most expensive operation.
191	*/	372	*/
192	typedef struct {	373	typedef struct {
193	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	374	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
194	int size;	375	int size;
195	} reqq;	376	} etp_reqq;
196		377
197	static reqq req_queue;	378	static etp_reqq req_queue;
198	static reqq res_queue;	379	static etp_reqq res_queue;
199		380
200	static int reqq_push (reqq *q, eio_req *req)	381	static int ecb_noinline
		382	reqq_push (etp_reqq *q, ETP_REQ *req)
201	{	383	{
202	int pri = req->pri;	384	int pri = req->pri;
203	req->next = 0;	385	req->next = 0;
204		386
205	if (q->qe[pri])	387	if (q->qe[pri])
…		…
211	q->qe[pri] = q->qs[pri] = req;	393	q->qe[pri] = q->qs[pri] = req;
212		394
213	return q->size++;	395	return q->size++;
214	}	396	}
215		397
216	static eio_req *reqq_shift (reqq *q)	398	static ETP_REQ * ecb_noinline
		399	reqq_shift (etp_reqq *q)
217	{	400	{
218	int pri;	401	int pri;
219		402
220	if (!q->size)	403	if (!q->size)
221	return 0;	404	return 0;
222		405
223	--q->size;	406	--q->size;
224		407
225	for (pri = EIO_NUM_PRI; pri--; )	408	for (pri = ETP_NUM_PRI; pri--; )
226	{	409	{
227	eio_req *req = q->qs[pri];	410	eio_req *req = q->qs[pri];
228		411
229	if (req)	412	if (req)
230	{	413	{
…		…
236	}	419	}
237		420
238	abort ();	421	abort ();
239	}	422	}
240		423
241	static void grp_try_feed (eio_req *grp)	424	static void ecb_cold
		425	etp_thread_init (void)
242	{	426	{
243	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	427	#if !HAVE_PREADWRITE
		428	X_MUTEX_CREATE (preadwritelock);
		429	#endif
		430	X_MUTEX_CREATE (wrklock);
		431	X_MUTEX_CREATE (reslock);
		432	X_MUTEX_CREATE (reqlock);
		433	X_COND_CREATE (reqwait);
		434	}
		435
		436	static void ecb_cold
		437	etp_atfork_prepare (void)
		438	{
		439	}
		440
		441	static void ecb_cold
		442	etp_atfork_parent (void)
		443	{
		444	}
		445
		446	static void ecb_cold
		447	etp_atfork_child (void)
		448	{
		449	ETP_REQ *prv;
		450
		451	while ((prv = reqq_shift (&req_queue)))
		452	ETP_DESTROY (prv);
		453
		454	while ((prv = reqq_shift (&res_queue)))
		455	ETP_DESTROY (prv);
		456
		457	while (wrk_first.next != &wrk_first)
244	{	458	{
245	int old_len = grp->size;	459	etp_worker *wrk = wrk_first.next;
246		460
247	EIO_FEED (grp);	461	if (wrk->req)
		462	ETP_DESTROY (wrk->req);
248		463
249	/* stop if no progress has been made */	464	etp_worker_clear (wrk);
250	if (old_len == grp->size)	465	etp_worker_free (wrk);
251	{
252	grp->feed = 0;
253	break;
254	}
255	}	466	}
256	}
257		467
258	static int eio_finish (eio_req *req);	468	started = 0;
		469	idle = 0;
		470	nreqs = 0;
		471	nready = 0;
		472	npending = 0;
259		473
260	static int grp_dec (eio_req *grp)	474	etp_thread_init ();
261	{	475	}
262	--grp->size;
263		476
264	/* call feeder, if applicable */	477	static void ecb_cold
265	grp_try_feed (grp);	478	etp_once_init (void)
		479	{
		480	etp_thread_init ();
		481	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
		482	}
266		483
267	/* finish, if done */	484	static int ecb_cold
268	if (!grp->size && grp->int1)	485	etp_init (void (*want_poll)(void), void (*done_poll)(void))
269	return eio_finish (grp);	486	{
270	else	487	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
		488
		489	pthread_once (&doinit, etp_once_init);
		490
		491	want_poll_cb = want_poll;
		492	done_poll_cb = done_poll;
		493
271	return 0;	494	return 0;
272	}	495	}
273		496
274	void eio_destroy (eio_req *req)
275	{
276	if ((req)->flags & EIO_FLAG_PTR2_FREE)
277	free (req->ptr2);
278
279	EIO_DESTROY (req);
280	}
281
282	static int eio_finish (eio_req *req)
283	{
284	int res = EIO_FINISH (req);
285
286	if (req->grp)
287	{
288	int res2;
289	eio_req *grp = req->grp;
290
291	/* unlink request */
292	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
293	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
294
295	if (grp->grp_first == req)
296	grp->grp_first = req->grp_next;
297
298	res2 = grp_dec (grp);
299
300	if (!res && res2)
301	res = res2;
302	}
303
304	eio_destroy (req);
305
306	return res;
307	}
308
309	void eio_grp_cancel (eio_req *grp)
310	{
311	for (grp = grp->grp_first; grp; grp = grp->grp_next)
312	eio_cancel (grp);
313	}
314
315	void eio_cancel (eio_req *req)
316	{
317	req->flags |= EIO_FLAG_CANCELLED;
318
319	eio_grp_cancel (req);
320	}
321
322	X_THREAD_PROC (eio_proc);	497	X_THREAD_PROC (etp_proc);
323		498
324	static void start_thread (void)	499	static void ecb_cold
		500	etp_start_thread (void)
325	{	501	{
326	worker *wrk = calloc (1, sizeof (worker));	502	etp_worker *wrk = calloc (1, sizeof (etp_worker));
327		503
328	if (!wrk)	504	/*TODO*/
329	croak ("unable to allocate worker thread data");	505	assert (("unable to allocate worker thread data", wrk));
330		506
331	X_LOCK (wrklock);	507	X_LOCK (wrklock);
332		508
333	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	509	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
334	{	510	{
335	wrk->prev = &wrk_first;	511	wrk->prev = &wrk_first;
336	wrk->next = wrk_first.next;	512	wrk->next = wrk_first.next;
337	wrk_first.next->prev = wrk;	513	wrk_first.next->prev = wrk;
338	wrk_first.next = wrk;	514	wrk_first.next = wrk;
…		…
342	free (wrk);	518	free (wrk);
343		519
344	X_UNLOCK (wrklock);	520	X_UNLOCK (wrklock);
345	}	521	}
346		522
		523	static void
347	static void maybe_start_thread (void)	524	etp_maybe_start_thread (void)
348	{	525	{
349	if (eio_nthreads () >= wanted)	526	if (ecb_expect_true (etp_nthreads () >= wanted))
350	return;	527	return;
351		528
352	/* todo: maybe use idle here, but might be less exact */	529	/* todo: maybe use idle here, but might be less exact */
353	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	530	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
354	return;	531	return;
355		532
356	start_thread ();	533	etp_start_thread ();
357	}	534	}
358		535
359	void eio_submit (eio_req *req)	536	static void ecb_cold
360	{	537	etp_end_thread (void)
361	++nreqs;
362
363	X_LOCK (reqlock);
364	++nready;
365	reqq_push (&req_queue, req);
366	X_COND_SIGNAL (reqwait);
367	X_UNLOCK (reqlock);
368
369	maybe_start_thread ();
370	}
371
372	static void end_thread (void)
373	{	538	{
374	eio_req *req = calloc (1, sizeof (eio_req));	539	eio_req *req = calloc (1, sizeof (eio_req));
375		540
376	req->type = EIO_QUIT;	541	req->type = -1;
377	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	542	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
378		543
379	X_LOCK (reqlock);	544	X_LOCK (reqlock);
380	reqq_push (&req_queue, req);	545	reqq_push (&req_queue, req);
381	X_COND_SIGNAL (reqwait);	546	X_COND_SIGNAL (reqwait);
382	X_UNLOCK (reqlock);	547	X_UNLOCK (reqlock);
…		…
384	X_LOCK (wrklock);	549	X_LOCK (wrklock);
385	--started;	550	--started;
386	X_UNLOCK (wrklock);	551	X_UNLOCK (wrklock);
387	}	552	}
388		553
389	void eio_set_max_poll_time (double nseconds)	554	static int
390	{
391	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
392	max_poll_time = nseconds;
393	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
394	}
395
396	void eio_set_max_poll_reqs (unsigned int maxreqs)
397	{
398	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
399	max_poll_reqs = maxreqs;
400	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
401	}
402
403	void eio_set_max_idle (unsigned int nthreads)
404	{
405	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
406	max_idle = nthreads <= 0 ? 1 : nthreads;
407	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
408	}
409
410	void eio_set_min_parallel (unsigned int nthreads)
411	{
412	if (wanted < nthreads)
413	wanted = nthreads;
414	}
415
416	void eio_set_max_parallel (unsigned int nthreads)
417	{
418	if (wanted > nthreads)
419	wanted = nthreads;
420
421	while (started > wanted)
422	end_thread ();
423	}
424
425	int eio_poll (void)	555	etp_poll (void)
426	{	556	{
427	int maxreqs = max_poll_reqs;	557	unsigned int maxreqs;
		558	unsigned int maxtime;
428	struct timeval tv_start, tv_now;	559	struct timeval tv_start, tv_now;
429	eio_req *req;
430		560
		561	X_LOCK (reslock);
		562	maxreqs = max_poll_reqs;
		563	maxtime = max_poll_time;
		564	X_UNLOCK (reslock);
		565
431	if (max_poll_time)	566	if (maxtime)
432	gettimeofday (&tv_start, 0);	567	gettimeofday (&tv_start, 0);
433		568
434	for (;;)	569	for (;;)
435	{	570	{
		571	ETP_REQ *req;
		572
436	maybe_start_thread ();	573	etp_maybe_start_thread ();
437		574
438	X_LOCK (reslock);	575	X_LOCK (reslock);
439	req = reqq_shift (&res_queue);	576	req = reqq_shift (&res_queue);
440		577
441	if (req)	578	if (req)
…		…
449	X_UNLOCK (reslock);	586	X_UNLOCK (reslock);
450		587
451	if (!req)	588	if (!req)
452	return 0;	589	return 0;
453		590
		591	X_LOCK (reqlock);
454	--nreqs;	592	--nreqs;
		593	X_UNLOCK (reqlock);
455		594
456	if (req->type == EIO_GROUP && req->size)	595	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
457	{	596	{
458	req->int1 = 1; /* mark request as delayed */	597	req->int1 = 1; /* mark request as delayed */
459	continue;	598	continue;
460	}	599	}
461	else	600	else
462	{	601	{
463	int res = eio_finish (req);	602	int res = ETP_FINISH (req);
464	if (res)	603	if (ecb_expect_false (res))
465	return res;	604	return res;
466	}	605	}
467		606
468	if (maxreqs && !--maxreqs)	607	if (ecb_expect_false (maxreqs && !--maxreqs))
469	break;	608	break;
470		609
471	if (max_poll_time)	610	if (maxtime)
472	{	611	{
473	gettimeofday (&tv_now, 0);	612	gettimeofday (&tv_now, 0);
474		613
475	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	614	if (tvdiff (&tv_start, &tv_now) >= maxtime)
476	break;	615	break;
477	}	616	}
478	}	617	}
479		618
480	errno = EAGAIN;	619	errno = EAGAIN;
481	return -1;	620	return -1;
482	}	621	}
483		622
		623	static void
		624	etp_cancel (ETP_REQ *req)
		625	{
		626	req->cancelled = 1;
		627
		628	eio_grp_cancel (req);
		629	}
		630
		631	static void
		632	etp_submit (ETP_REQ *req)
		633	{
		634	req->pri -= ETP_PRI_MIN;
		635
		636	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
		637	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		638
		639	if (ecb_expect_false (req->type == EIO_GROUP))
		640	{
		641	/* I hope this is worth it :/ */
		642	X_LOCK (reqlock);
		643	++nreqs;
		644	X_UNLOCK (reqlock);
		645
		646	X_LOCK (reslock);
		647
		648	++npending;
		649
		650	if (!reqq_push (&res_queue, req) && want_poll_cb)
		651	want_poll_cb ();
		652
		653	X_UNLOCK (reslock);
		654	}
		655	else
		656	{
		657	X_LOCK (reqlock);
		658	++nreqs;
		659	++nready;
		660	reqq_push (&req_queue, req);
		661	X_COND_SIGNAL (reqwait);
		662	X_UNLOCK (reqlock);
		663
		664	etp_maybe_start_thread ();
		665	}
		666	}
		667
		668	static void ecb_cold
		669	etp_set_max_poll_time (double nseconds)
		670	{
		671	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		672	max_poll_time = nseconds * EIO_TICKS;
		673	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		674	}
		675
		676	static void ecb_cold
		677	etp_set_max_poll_reqs (unsigned int maxreqs)
		678	{
		679	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		680	max_poll_reqs = maxreqs;
		681	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		682	}
		683
		684	static void ecb_cold
		685	etp_set_max_idle (unsigned int nthreads)
		686	{
		687	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		688	max_idle = nthreads;
		689	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		690	}
		691
		692	static void ecb_cold
		693	etp_set_idle_timeout (unsigned int seconds)
		694	{
		695	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		696	idle_timeout = seconds;
		697	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		698	}
		699
		700	static void ecb_cold
		701	etp_set_min_parallel (unsigned int nthreads)
		702	{
		703	if (wanted < nthreads)
		704	wanted = nthreads;
		705	}
		706
		707	static void ecb_cold
		708	etp_set_max_parallel (unsigned int nthreads)
		709	{
		710	if (wanted > nthreads)
		711	wanted = nthreads;
		712
		713	while (started > wanted)
		714	etp_end_thread ();
		715	}
		716
		717	/*****************************************************************************/
		718
		719	static void
		720	grp_try_feed (eio_req *grp)
		721	{
		722	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
		723	{
		724	grp->flags &= ~EIO_FLAG_GROUPADD;
		725
		726	EIO_FEED (grp);
		727
		728	/* stop if no progress has been made */
		729	if (!(grp->flags & EIO_FLAG_GROUPADD))
		730	{
		731	grp->feed = 0;
		732	break;
		733	}
		734	}
		735	}
		736
		737	static int
		738	grp_dec (eio_req *grp)
		739	{
		740	--grp->size;
		741
		742	/* call feeder, if applicable */
		743	grp_try_feed (grp);
		744
		745	/* finish, if done */
		746	if (!grp->size && grp->int1)
		747	return eio_finish (grp);
		748	else
		749	return 0;
		750	}
		751
		752	static void
		753	eio_destroy (eio_req *req)
		754	{
		755	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
		756	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
		757
		758	EIO_DESTROY (req);
		759	}
		760
		761	static int
		762	eio_finish (eio_req *req)
		763	{
		764	int res = EIO_FINISH (req);
		765
		766	if (req->grp)
		767	{
		768	int res2;
		769	eio_req *grp = req->grp;
		770
		771	/* unlink request */
		772	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		773	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		774
		775	if (grp->grp_first == req)
		776	grp->grp_first = req->grp_next;
		777
		778	res2 = grp_dec (grp);
		779
		780	if (!res)
		781	res = res2;
		782	}
		783
		784	eio_destroy (req);
		785
		786	return res;
		787	}
		788
		789	void
		790	eio_grp_cancel (eio_req *grp)
		791	{
		792	for (grp = grp->grp_first; grp; grp = grp->grp_next)
		793	eio_cancel (grp);
		794	}
		795
		796	void
		797	eio_cancel (eio_req *req)
		798	{
		799	etp_cancel (req);
		800	}
		801
		802	void
		803	eio_submit (eio_req *req)
		804	{
		805	etp_submit (req);
		806	}
		807
		808	unsigned int
		809	eio_nreqs (void)
		810	{
		811	return etp_nreqs ();
		812	}
		813
		814	unsigned int
		815	eio_nready (void)
		816	{
		817	return etp_nready ();
		818	}
		819
		820	unsigned int
		821	eio_npending (void)
		822	{
		823	return etp_npending ();
		824	}
		825
		826	unsigned int ecb_cold
		827	eio_nthreads (void)
		828	{
		829	return etp_nthreads ();
		830	}
		831
		832	void ecb_cold
		833	eio_set_max_poll_time (double nseconds)
		834	{
		835	etp_set_max_poll_time (nseconds);
		836	}
		837
		838	void ecb_cold
		839	eio_set_max_poll_reqs (unsigned int maxreqs)
		840	{
		841	etp_set_max_poll_reqs (maxreqs);
		842	}
		843
		844	void ecb_cold
		845	eio_set_max_idle (unsigned int nthreads)
		846	{
		847	etp_set_max_idle (nthreads);
		848	}
		849
		850	void ecb_cold
		851	eio_set_idle_timeout (unsigned int seconds)
		852	{
		853	etp_set_idle_timeout (seconds);
		854	}
		855
		856	void ecb_cold
		857	eio_set_min_parallel (unsigned int nthreads)
		858	{
		859	etp_set_min_parallel (nthreads);
		860	}
		861
		862	void ecb_cold
		863	eio_set_max_parallel (unsigned int nthreads)
		864	{
		865	etp_set_max_parallel (nthreads);
		866	}
		867
		868	int eio_poll (void)
		869	{
		870	return etp_poll ();
		871	}
		872
484	/*****************************************************************************/	873	/*****************************************************************************/
485	/* work around various missing functions */	874	/* work around various missing functions */
486		875
487	#if !HAVE_PREADWRITE	876	#if !HAVE_PREADWRITE
		877	# undef pread
		878	# undef pwrite
488	# define pread aio_pread	879	# define pread eio__pread
489	# define pwrite aio_pwrite	880	# define pwrite eio__pwrite
490		881
491	/*	882	static eio_ssize_t
492	* make our pread/pwrite safe against themselves, but not against	883	eio__pread (int fd, void *buf, size_t count, off_t offset)
493	* normal read/write by using a mutex. slows down execution a lot,
494	* but that's your problem, not mine.
495	*/
496	static mutex_t preadwritelock = X_MUTEX_INIT;
497
498	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
499	{	884	{
500	ssize_t res;	885	eio_ssize_t res;
501	off_t ooffset;	886	off_t ooffset;
502		887
503	X_LOCK (preadwritelock);	888	X_LOCK (preadwritelock);
504	ooffset = lseek (fd, 0, SEEK_CUR);	889	ooffset = lseek (fd, 0, SEEK_CUR);
505	lseek (fd, offset, SEEK_SET);	890	lseek (fd, offset, SEEK_SET);
…		…
508	X_UNLOCK (preadwritelock);	893	X_UNLOCK (preadwritelock);
509		894
510	return res;	895	return res;
511	}	896	}
512		897
513	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	898	static eio_ssize_t
		899	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
514	{	900	{
515	ssize_t res;	901	eio_ssize_t res;
516	off_t ooffset;	902	off_t ooffset;
517		903
518	X_LOCK (preadwritelock);	904	X_LOCK (preadwritelock);
519	ooffset = lseek (fd, 0, SEEK_CUR);	905	ooffset = lseek (fd, 0, SEEK_CUR);
520	lseek (fd, offset, SEEK_SET);	906	lseek (fd, offset, SEEK_SET);
521	res = write (fd, buf, count);	907	res = write (fd, buf, count);
522	lseek (fd, offset, SEEK_SET);	908	lseek (fd, ooffset, SEEK_SET);
523	X_UNLOCK (preadwritelock);	909	X_UNLOCK (preadwritelock);
524		910
525	return res;	911	return res;
526	}	912	}
527	#endif	913	#endif
528		914
529	#ifndef HAVE_FUTIMES	915	#ifndef HAVE_UTIMES
530		916
		917	# undef utimes
531	# define utimes(path,times) aio_utimes (path, times)	918	# define utimes(path,times) eio__utimes (path, times)
532	# define futimes(fd,times) aio_futimes (fd, times)
533		919
		920	static int
534	static int aio_utimes (const char *filename, const struct timeval times[2])	921	eio__utimes (const char *filename, const struct timeval times[2])
535	{	922	{
536	if (times)	923	if (times)
537	{	924	{
538	struct utimbuf buf;	925	struct utimbuf buf;
539		926
…		…
544	}	931	}
545	else	932	else
546	return utime (filename, 0);	933	return utime (filename, 0);
547	}	934	}
548		935
		936	#endif
		937
		938	#ifndef HAVE_FUTIMES
		939
		940	# undef futimes
		941	# define futimes(fd,times) eio__futimes (fd, times)
		942
		943	static int
549	static int aio_futimes (int fd, const struct timeval tv[2])	944	eio__futimes (int fd, const struct timeval tv[2])
550	{	945	{
551	errno = ENOSYS;	946	errno = ENOSYS;
552	return -1;	947	return -1;
553	}	948	}
554		949
555	#endif	950	#endif
556		951
557	#if !HAVE_FDATASYNC	952	#if !HAVE_FDATASYNC
		953	# undef fdatasync
558	# define fdatasync fsync	954	# define fdatasync(fd) fsync (fd)
559	#endif	955	#endif
		956
		957	/* sync_file_range always needs emulation */
		958	static int
		959	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
		960	{
		961	#if HAVE_SYNC_FILE_RANGE
		962	int res;
		963
		964	if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
		965	|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
		966	|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
		967	{
		968	flags = 0
		969	| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
		970	| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
		971	| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
		972	}
		973
		974	res = sync_file_range (fd, offset, nbytes, flags);
		975
		976	if (!res || errno != ENOSYS)
		977	return res;
		978	#endif
		979
		980	/* even though we could play tricks with the flags, it's better to always
		981	* call fdatasync, as that matches the expectation of its users best */
		982	return fdatasync (fd);
		983	}
		984
		985	static int
		986	eio__fallocate (int fd, int mode, off_t offset, size_t len)
		987	{
		988	#if HAVE_FALLOCATE
		989	return fallocate (fd, mode, offset, len);
		990	#else
		991	errno = ENOSYS;
		992	return -1;
		993	#endif
		994	}
560		995
561	#if !HAVE_READAHEAD	996	#if !HAVE_READAHEAD
		997	# undef readahead
562	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	998	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
563		999
		1000	static eio_ssize_t
564	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	1001	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
565	{	1002	{
566	size_t todo = count;	1003	size_t todo = count;
567	dBUF;	1004	dBUF;
568		1005
569	while (todo > 0)	1006	while (todo > 0)
…		…
579	return count;	1016	return count;
580	}	1017	}
581		1018
582	#endif	1019	#endif
583		1020
584	#if !HAVE_READDIR_R
585	# define readdir_r aio_readdir_r
586
587	static mutex_t readdirlock = X_MUTEX_INIT;
588
589	static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)
590	{
591	X_DIRENT *e;
592	int errorno;
593
594	X_LOCK (readdirlock);
595
596	e = readdir (dirp);
597	errorno = errno;
598
599	if (e)
600	{
601	*res = ent;
602	strcpy (ent->d_name, e->d_name);
603	}
604	else
605	*res = 0;
606
607	X_UNLOCK (readdirlock);
608
609	errno = errorno;
610	return e ? 0 : -1;
611	}
612	#endif
613
614	/* sendfile always needs emulation */	1021	/* sendfile always needs emulation */
		1022	static eio_ssize_t
615	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	1023	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
616	{	1024	{
		1025	eio_ssize_t written = 0;
617	ssize_t res;	1026	eio_ssize_t res;
618		1027
619	if (!count)	1028	if (!count)
620	return 0;	1029	return 0;
621		1030
		1031	for (;;)
		1032	{
		1033	#ifdef __APPLE__
		1034	# undef HAVE_SENDFILE /* broken, as everything on os x */
		1035	#endif
622	#if HAVE_SENDFILE	1036	#if HAVE_SENDFILE
623	# if __linux	1037	# if __linux
		1038	off_t soffset = offset;
624	res = sendfile (ofd, ifd, &offset, count);	1039	res = sendfile (ofd, ifd, &soffset, count);
625		1040
626	# elif __freebsd	1041	# elif __FreeBSD__
627	/*	1042	/*
628	* Of course, the freebsd sendfile is a dire hack with no thoughts	1043	* Of course, the freebsd sendfile is a dire hack with no thoughts
629	* wasted on making it similar to other I/O functions.	1044	* wasted on making it similar to other I/O functions.
630	*/	1045	*/
631	{
632	off_t sbytes;	1046	off_t sbytes;
633	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	1047	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
634		1048
635	if (res < 0 && sbytes)	1049	#if 0 /* according to the manpage, this is correct, but broken behaviour */
636	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */	1050	/* freebsd' sendfile will return 0 on success */
		1051	/* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
		1052	/* not on e.g. EIO or EPIPE - sounds broken */
		1053	if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
637	res = sbytes;	1054	res = sbytes;
638	}	1055	#endif
		1056
		1057	/* according to source inspection, this is correct, and useful behaviour */
		1058	if (sbytes)
		1059	res = sbytes;
		1060
		1061	# elif defined (__APPLE__)
		1062	off_t sbytes = count;
		1063	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
		1064
		1065	/* according to the manpage, sbytes is always valid */
		1066	if (sbytes)
		1067	res = sbytes;
639		1068
640	# elif __hpux	1069	# elif __hpux
641	res = sendfile (ofd, ifd, offset, count, 0, 0);	1070	res = sendfile (ofd, ifd, offset, count, 0, 0);
642		1071
643	# elif __solaris	1072	# elif __solaris
644	{
645	struct sendfilevec vec;	1073	struct sendfilevec vec;
646	size_t sbytes;	1074	size_t sbytes;
647		1075
648	vec.sfv_fd = ifd;	1076	vec.sfv_fd = ifd;
649	vec.sfv_flag = 0;	1077	vec.sfv_flag = 0;
650	vec.sfv_off = offset;	1078	vec.sfv_off = offset;
651	vec.sfv_len = count;	1079	vec.sfv_len = count;
652		1080
653	res = sendfilev (ofd, &vec, 1, &sbytes);	1081	res = sendfilev (ofd, &vec, 1, &sbytes);
654		1082
655	if (res < 0 && sbytes)	1083	if (res < 0 && sbytes)
656	res = sbytes;	1084	res = sbytes;
657	}
658		1085
659	# endif	1086	# endif
		1087
		1088	#elif defined (_WIN32) && 0
		1089	/* does not work, just for documentation of what would need to be done */
		1090	/* actually, cannot be done like this, as TransmitFile changes the file offset, */
		1091	/* libeio guarantees that the file offset does not change, and windows */
		1092	/* has no way to get an independent handle to the same file description */
		1093	HANDLE h = TO_SOCKET (ifd);
		1094	SetFilePointer (h, offset, 0, FILE_BEGIN);
		1095	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
		1096
660	#else	1097	#else
661	res = -1;	1098	res = -1;
662	errno = ENOSYS;	1099	errno = ENOSYS;
663	#endif	1100	#endif
664		1101
		1102	/* we assume sendfile can copy at least 128mb in one go */
		1103	if (res <= 128 * 1024 * 1024)
		1104	{
		1105	if (res > 0)
		1106	written += res;
		1107
		1108	if (written)
		1109	return written;
		1110
		1111	break;
		1112	}
		1113	else
		1114	{
		1115	/* if we requested more, then probably the kernel was lazy */
		1116	written += res;
		1117	offset += res;
		1118	count -= res;
		1119
		1120	if (!count)
		1121	return written;
		1122	}
		1123	}
		1124
665	if (res < 0	1125	if (res < 0
666	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	1126	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		1127	/* BSDs */
		1128	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
		1129	|| errno == ENOTSUP
		1130	#endif
		1131	|| errno == EOPNOTSUPP /* BSDs */
667	#if __solaris	1132	#if __solaris
668	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	1133	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
669	#endif	1134	#endif
670	)	1135	)
671	)	1136	)
…		…
675		1140
676	res = 0;	1141	res = 0;
677		1142
678	while (count)	1143	while (count)
679	{	1144	{
680	ssize_t cnt;	1145	eio_ssize_t cnt;
681		1146
682	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);	1147	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);
683		1148
684	if (cnt <= 0)	1149	if (cnt <= 0)
685	{	1150	{
…		…
702	}	1167	}
703		1168
704	return res;	1169	return res;
705	}	1170	}
706		1171
		1172	#ifdef PAGESIZE
		1173	# define eio_pagesize() PAGESIZE
		1174	#else
		1175	static intptr_t
		1176	eio_pagesize (void)
		1177	{
		1178	static intptr_t page;
		1179
		1180	if (!page)
		1181	page = sysconf (_SC_PAGESIZE);
		1182
		1183	return page;
		1184	}
		1185	#endif
		1186
		1187	static void
		1188	eio_page_align (void **addr, size_t *length)
		1189	{
		1190	intptr_t mask = eio_pagesize () - 1;
		1191
		1192	/* round down addr */
		1193	intptr_t adj = mask & (intptr_t)*addr;
		1194
		1195	*addr = (void *)((intptr_t)*addr - adj);
		1196	*length += adj;
		1197
		1198	/* round up length */
		1199	*length = (*length + mask) & ~mask;
		1200	}
		1201
		1202	#if !_POSIX_MEMLOCK
		1203	# define eio__mlockall(a) EIO_ENOSYS ()
		1204	#else
		1205
		1206	static int
		1207	eio__mlockall (int flags)
		1208	{
		1209	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1210	extern int mallopt (int, int);
		1211	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1212	#endif
		1213
		1214	if (EIO_MCL_CURRENT != MCL_CURRENT
		1215	|| EIO_MCL_FUTURE != MCL_FUTURE)
		1216	{
		1217	flags = 0
		1218	| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
		1219	| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
		1220	}
		1221
		1222	return mlockall (flags);
		1223	}
		1224	#endif
		1225
		1226	#if !_POSIX_MEMLOCK_RANGE
		1227	# define eio__mlock(a,b) EIO_ENOSYS ()
		1228	#else
		1229
		1230	static int
		1231	eio__mlock (void *addr, size_t length)
		1232	{
		1233	eio_page_align (&addr, &length);
		1234
		1235	return mlock (addr, length);
		1236	}
		1237
		1238	#endif
		1239
		1240	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1241	# define eio__msync(a,b,c) EIO_ENOSYS ()
		1242	#else
		1243
		1244	static int
		1245	eio__msync (void *mem, size_t len, int flags)
		1246	{
		1247	eio_page_align (&mem, &len);
		1248
		1249	if (EIO_MS_ASYNC != MS_SYNC
		1250	|| EIO_MS_INVALIDATE != MS_INVALIDATE
		1251	|| EIO_MS_SYNC != MS_SYNC)
		1252	{
		1253	flags = 0
		1254	| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
		1255	| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
		1256	| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
		1257	}
		1258
		1259	return msync (mem, len, flags);
		1260	}
		1261
		1262	#endif
		1263
		1264	static int
		1265	eio__mtouch (eio_req *req)
		1266	{
		1267	void *mem = req->ptr2;
		1268	size_t len = req->size;
		1269	int flags = req->int1;
		1270
		1271	eio_page_align (&mem, &len);
		1272
		1273	{
		1274	intptr_t addr = (intptr_t)mem;
		1275	intptr_t end = addr + len;
		1276	intptr_t page = eio_pagesize ();
		1277
		1278	if (addr < end)
		1279	if (flags & EIO_MT_MODIFY) /* modify */
		1280	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1281	else
		1282	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1283	}
		1284
		1285	return 0;
		1286	}
		1287
		1288	/*****************************************************************************/
		1289	/* requests implemented outside eio_execute, because they are so large */
		1290
		1291	static void
		1292	eio__realpath (eio_req *req, etp_worker *self)
		1293	{
		1294	char *rel = req->ptr1;
		1295	char *res;
		1296	char *tmp1, *tmp2;
		1297	#if SYMLOOP_MAX > 32
		1298	int symlinks = SYMLOOP_MAX;
		1299	#else
		1300	int symlinks = 32;
		1301	#endif
		1302
		1303	req->result = -1;
		1304
		1305	errno = EINVAL;
		1306	if (!rel)
		1307	return;
		1308
		1309	errno = ENOENT;
		1310	if (!*rel)
		1311	return;
		1312
		1313	if (!req->ptr2)
		1314	{
		1315	X_LOCK (wrklock);
		1316	req->flags |= EIO_FLAG_PTR2_FREE;
		1317	X_UNLOCK (wrklock);
		1318	req->ptr2 = malloc (PATH_MAX * 3);
		1319
		1320	errno = ENOMEM;
		1321	if (!req->ptr2)
		1322	return;
		1323	}
		1324
		1325	res = req->ptr2;
		1326	tmp1 = res + PATH_MAX;
		1327	tmp2 = tmp1 + PATH_MAX;
		1328
		1329	#if 0 /* disabled, the musl way to do things is just too racy */
		1330	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
		1331	/* on linux we may be able to ask the kernel */
		1332	{
		1333	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
		1334
		1335	if (fd >= 0)
		1336	{
		1337	sprintf (tmp1, "/proc/self/fd/%d", fd);
		1338	req->result = readlink (tmp1, res, PATH_MAX);
		1339	close (fd);
		1340
		1341	/* here we should probably stat the open file and the disk file, to make sure they still match */
		1342
		1343	if (req->result > 0)
		1344	goto done;
		1345	}
		1346	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
		1347	return;
		1348	}
		1349	#endif
		1350	#endif
		1351
		1352	if (*rel != '/')
		1353	{
		1354	if (!getcwd (res, PATH_MAX))
		1355	return;
		1356
		1357	if (res [1]) /* only use if not / */
		1358	res += strlen (res);
		1359	}
		1360
		1361	while (*rel)
		1362	{
		1363	eio_ssize_t len, linklen;
		1364	char *beg = rel;
		1365
		1366	while (*rel && *rel != '/')
		1367	++rel;
		1368
		1369	len = rel - beg;
		1370
		1371	if (!len) /* skip slashes */
		1372	{
		1373	++rel;
		1374	continue;
		1375	}
		1376
		1377	if (beg [0] == '.')
		1378	{
		1379	if (len == 1)
		1380	continue; /* . - nop */
		1381
		1382	if (beg [1] == '.' && len == 2)
		1383	{
		1384	/* .. - back up one component, if possible */
		1385
		1386	while (res != req->ptr2)
		1387	if (*--res == '/')
		1388	break;
		1389
		1390	continue;
		1391	}
		1392	}
		1393
		1394	errno = ENAMETOOLONG;
		1395	if (res + 1 + len + 1 >= tmp1)
		1396	return;
		1397
		1398	/* copy one component */
		1399	*res = '/';
		1400	memcpy (res + 1, beg, len);
		1401
		1402	/* zero-terminate, for readlink */
		1403	res [len + 1] = 0;
		1404
		1405	/* now check if it's a symlink */
		1406	linklen = readlink (req->ptr2, tmp1, PATH_MAX);
		1407
		1408	if (linklen < 0)
		1409	{
		1410	if (errno != EINVAL)
		1411	return;
		1412
		1413	/* it's a normal directory. hopefully */
		1414	res += len + 1;
		1415	}
		1416	else
		1417	{
		1418	/* yay, it was a symlink - build new path in tmp2 */
		1419	int rellen = strlen (rel);
		1420
		1421	errno = ENAMETOOLONG;
		1422	if (linklen + 1 + rellen >= PATH_MAX)
		1423	return;
		1424
		1425	errno = ELOOP;
		1426	if (!--symlinks)
		1427	return;
		1428
		1429	if (*tmp1 == '/')
		1430	res = req->ptr2; /* symlink resolves to an absolute path */
		1431
		1432	/* we need to be careful, as rel might point into tmp2 already */
		1433	memmove (tmp2 + linklen + 1, rel, rellen + 1);
		1434	tmp2 [linklen] = '/';
		1435	memcpy (tmp2, tmp1, linklen);
		1436
		1437	rel = tmp2;
		1438	}
		1439	}
		1440
		1441	/* special case for the lone root path */
		1442	if (res == req->ptr2)
		1443	*res++ = '/';
		1444
		1445	req->result = res - (char *)req->ptr2;
		1446
		1447	done:
		1448	req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */
		1449	}
		1450
		1451	static signed char
		1452	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
		1453	{
		1454	return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
		1455	: a->inode < b->inode ? -1
		1456	: a->inode > b->inode ? 1
		1457	: 0;
		1458	}
		1459
		1460	#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
		1461
		1462	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
		1463	#define EIO_SORT_FAST 60 /* when to only use insertion sort */
		1464
		1465	static void
		1466	eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
		1467	{
		1468	unsigned char bits [9 + sizeof (ino_t) * 8];
		1469	unsigned char *bit = bits;
		1470
		1471	assert (CHAR_BIT == 8);
		1472	assert (sizeof (eio_dirent) * 8 < 256);
		1473	assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
		1474	assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */
		1475
		1476	if (size <= EIO_SORT_FAST)
		1477	return;
		1478
		1479	/* first prepare an array of bits to test in our radix sort */
		1480	/* try to take endianness into account, as well as differences in ino_t sizes */
		1481	/* inode_bits must contain all inodes ORed together */
		1482	/* which is used to skip bits that are 0 everywhere, which is very common */
		1483	{
		1484	ino_t endianness;
		1485	int i, j;
		1486
		1487	/* we store the byte offset of byte n into byte n of "endianness" */
		1488	for (i = 0; i < sizeof (ino_t); ++i)
		1489	((unsigned char *)&endianness)[i] = i;
		1490
		1491	*bit++ = 0;
		1492
		1493	for (i = 0; i < sizeof (ino_t); ++i)
		1494	{
		1495	/* shifting off the byte offsets out of "endianness" */
		1496	int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
		1497	endianness >>= 8;
		1498
		1499	for (j = 0; j < 8; ++j)
		1500	if (inode_bits & (((ino_t)1) << (i * 8 + j)))
		1501	*bit++ = offs + j;
		1502	}
		1503
		1504	for (j = 0; j < 8; ++j)
		1505	if (score_bits & (1 << j))
		1506	*bit++ = offsetof (eio_dirent, score) * 8 + j;
		1507	}
		1508
		1509	/* now actually do the sorting (a variant of MSD radix sort) */
		1510	{
		1511	eio_dirent *base_stk [9 + sizeof (ino_t) * 8], *base;
		1512	eio_dirent *end_stk [9 + sizeof (ino_t) * 8], *end;
		1513	unsigned char *bit_stk [9 + sizeof (ino_t) * 8];
		1514	int stk_idx = 0;
		1515
		1516	base_stk [stk_idx] = dents;
		1517	end_stk [stk_idx] = dents + size;
		1518	bit_stk [stk_idx] = bit - 1;
		1519
		1520	do
		1521	{
		1522	base = base_stk [stk_idx];
		1523	end = end_stk [stk_idx];
		1524	bit = bit_stk [stk_idx];
		1525
		1526	for (;;)
		1527	{
		1528	unsigned char O = *bit >> 3;
		1529	unsigned char M = 1 << (*bit & 7);
		1530
		1531	eio_dirent *a = base;
		1532	eio_dirent *b = end;
		1533
		1534	if (b - a < EIO_SORT_CUTOFF)
		1535	break;
		1536
		1537	/* now bit-partition the array on the bit */
		1538	/* this ugly asymmetric loop seems to perform much better than typical */
		1539	/* partition algos found in the literature */
		1540	do
		1541	if (!(((unsigned char *)a)[O] & M))
		1542	++a;
		1543	else if (!(((unsigned char *)--b)[O] & M))
		1544	{
		1545	eio_dirent tmp = *a; *a = *b; *b = tmp;
		1546	++a;
		1547	}
		1548	while (b > a);
		1549
		1550	/* next bit, or stop, if no bits left in this path */
		1551	if (!*--bit)
		1552	break;
		1553
		1554	base_stk [stk_idx] = a;
		1555	end_stk [stk_idx] = end;
		1556	bit_stk [stk_idx] = bit;
		1557	++stk_idx;
		1558
		1559	end = a;
		1560	}
		1561	}
		1562	while (stk_idx--);
		1563	}
		1564	}
		1565
		1566	static void
		1567	eio_dent_insertion_sort (eio_dirent *dents, int size)
		1568	{
		1569	/* first move the smallest element to the front, to act as a sentinel */
		1570	{
		1571	int i;
		1572	eio_dirent *min = dents;
		1573
		1574	/* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
		1575	for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
		1576	if (EIO_DENT_CMP (dents [i], <, *min))
		1577	min = &dents [i];
		1578
		1579	/* swap elements 0 and j (minimum) */
		1580	{
		1581	eio_dirent tmp = *dents; *dents = *min; *min = tmp;
		1582	}
		1583	}
		1584
		1585	/* then do standard insertion sort, assuming that all elements are >= dents [0] */
		1586	{
		1587	eio_dirent *i, *j;
		1588
		1589	for (i = dents + 1; i < dents + size; ++i)
		1590	{
		1591	eio_dirent value = *i;
		1592
		1593	for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
		1594	j [1] = j [0];
		1595
		1596	j [1] = value;
		1597	}
		1598	}
		1599	}
		1600
		1601	static void
		1602	eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
		1603	{
		1604	if (size <= 1)
		1605	return; /* our insertion sort relies on size > 0 */
		1606
		1607	/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
		1608	/* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
		1609	eio_dent_radix_sort (dents, size, score_bits, inode_bits);
		1610
		1611	/* use an insertion sort at the end, or for small arrays, */
		1612	/* as insertion sort is more efficient for small partitions */
		1613	eio_dent_insertion_sort (dents, size);
		1614	}
		1615
707	/* read a full directory */	1616	/* read a full directory */
		1617	static void
708	static void scandir_ (eio_req *req, worker *self)	1618	eio__scandir (eio_req *req, etp_worker *self)
709	{	1619	{
710	DIR *dirp;	1620	DIR *dirp;
711	union
712	{
713	EIO_STRUCT_DIRENT d;
714	char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1];
715	} *u;
716	EIO_STRUCT_DIRENT *entp;	1621	EIO_STRUCT_DIRENT *entp;
717	char *name, *names;	1622	char *name, *names;
718	int memlen = 4096;	1623	int namesalloc = 4096;
719	int memofs = 0;	1624	int namesoffs = 0;
		1625	int flags = req->int1;
		1626	eio_dirent *dents = 0;
		1627	int dentalloc = 128;
720	int res = 0;	1628	int dentoffs = 0;
		1629	ino_t inode_bits = 0;
		1630
		1631	req->result = -1;
		1632
		1633	if (!(flags & EIO_READDIR_DENTS))
		1634	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
721		1635
722	X_LOCK (wrklock);	1636	X_LOCK (wrklock);
		1637	/* the corresponding closedir is in ETP_WORKER_CLEAR */
723	self->dirp = dirp = opendir (req->ptr1);	1638	self->dirp = dirp = opendir (req->ptr1);
724	self->dbuf = u = malloc (sizeof (*u));	1639
725	req->flags |= EIO_FLAG_PTR2_FREE;	1640	if (req->flags & EIO_FLAG_PTR1_FREE)
		1641	free (req->ptr1);
		1642
		1643	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
		1644	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
726	req->ptr2 = names = malloc (memlen);	1645	req->ptr2 = names = malloc (namesalloc);
727	X_UNLOCK (wrklock);	1646	X_UNLOCK (wrklock);
728		1647
729	if (dirp && u && names)	1648	if (dirp && names && (!flags || dents))
730	for (;;)	1649	for (;;)
731	{	1650	{
732	errno = 0;	1651	errno = 0;
733	readdir_r (dirp, &u->d, &entp);	1652	entp = readdir (dirp);
734		1653
735	if (!entp)	1654	if (!entp)
		1655	{
		1656	if (errno)
		1657	break;
		1658
		1659	/* sort etc. */
		1660	req->int1 = flags;
		1661	req->result = dentoffs;
		1662
		1663	if (flags & EIO_READDIR_STAT_ORDER)
		1664	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
		1665	else if (flags & EIO_READDIR_DIRS_FIRST)
		1666	if (flags & EIO_READDIR_FOUND_UNKNOWN)
		1667	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
		1668	else
		1669	{
		1670	/* in this case, all is known, and we just put dirs first and sort them */
		1671	eio_dirent *oth = dents + dentoffs;
		1672	eio_dirent *dir = dents;
		1673
		1674	/* now partition dirs to the front, and non-dirs to the back */
		1675	/* by walking from both sides and swapping if necessary */
		1676	while (oth > dir)
		1677	{
		1678	if (dir->type == EIO_DT_DIR)
		1679	++dir;
		1680	else if ((--oth)->type == EIO_DT_DIR)
		1681	{
		1682	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
		1683
		1684	++dir;
		1685	}
		1686	}
		1687
		1688	/* now sort the dirs only (dirs all have the same score) */
		1689	eio_dent_sort (dents, dir - dents, 0, inode_bits);
		1690	}
		1691
736	break;	1692	break;
		1693	}
737		1694
		1695	/* now add the entry to our list(s) */
738	name = entp->d_name;	1696	name = entp->d_name;
739		1697
		1698	/* skip . and .. entries */
740	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1699	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
741	{	1700	{
742	int len = strlen (name) + 1;	1701	int len = D_NAMLEN (entp) + 1;
743		1702
744	res++;	1703	while (ecb_expect_false (namesoffs + len > namesalloc))
745
746	while (memofs + len > memlen)
747	{	1704	{
748	memlen *= 2;	1705	namesalloc *= 2;
749	X_LOCK (wrklock);	1706	X_LOCK (wrklock);
750	req->ptr2 = names = realloc (names, memlen);	1707	req->ptr2 = names = realloc (names, namesalloc);
751	X_UNLOCK (wrklock);	1708	X_UNLOCK (wrklock);
752		1709
753	if (!names)	1710	if (!names)
754	break;	1711	break;
755	}	1712	}
756		1713
757	memcpy (names + memofs, name, len);	1714	memcpy (names + namesoffs, name, len);
		1715
		1716	if (dents)
		1717	{
		1718	struct eio_dirent *ent;
		1719
		1720	if (ecb_expect_false (dentoffs == dentalloc))
		1721	{
		1722	dentalloc *= 2;
		1723	X_LOCK (wrklock);
		1724	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
		1725	X_UNLOCK (wrklock);
		1726
		1727	if (!dents)
		1728	break;
		1729	}
		1730
		1731	ent = dents + dentoffs;
		1732
		1733	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
		1734	ent->namelen = len - 1;
		1735	ent->inode = D_INO (entp);
		1736
		1737	inode_bits |= ent->inode;
		1738
		1739	switch (D_TYPE (entp))
		1740	{
		1741	default:
		1742	ent->type = EIO_DT_UNKNOWN;
		1743	flags |= EIO_READDIR_FOUND_UNKNOWN;
		1744	break;
		1745
		1746	#ifdef DT_FIFO
		1747	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
		1748	#endif
		1749	#ifdef DT_CHR
		1750	case DT_CHR: ent->type = EIO_DT_CHR; break;
		1751	#endif
		1752	#ifdef DT_MPC
		1753	case DT_MPC: ent->type = EIO_DT_MPC; break;
		1754	#endif
		1755	#ifdef DT_DIR
		1756	case DT_DIR: ent->type = EIO_DT_DIR; break;
		1757	#endif
		1758	#ifdef DT_NAM
		1759	case DT_NAM: ent->type = EIO_DT_NAM; break;
		1760	#endif
		1761	#ifdef DT_BLK
		1762	case DT_BLK: ent->type = EIO_DT_BLK; break;
		1763	#endif
		1764	#ifdef DT_MPB
		1765	case DT_MPB: ent->type = EIO_DT_MPB; break;
		1766	#endif
		1767	#ifdef DT_REG
		1768	case DT_REG: ent->type = EIO_DT_REG; break;
		1769	#endif
		1770	#ifdef DT_NWK
		1771	case DT_NWK: ent->type = EIO_DT_NWK; break;
		1772	#endif
		1773	#ifdef DT_CMP
		1774	case DT_CMP: ent->type = EIO_DT_CMP; break;
		1775	#endif
		1776	#ifdef DT_LNK
		1777	case DT_LNK: ent->type = EIO_DT_LNK; break;
		1778	#endif
		1779	#ifdef DT_SOCK
		1780	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
		1781	#endif
		1782	#ifdef DT_DOOR
		1783	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
		1784	#endif
		1785	#ifdef DT_WHT
		1786	case DT_WHT: ent->type = EIO_DT_WHT; break;
		1787	#endif
		1788	}
		1789
		1790	ent->score = 7;
		1791
		1792	if (flags & EIO_READDIR_DIRS_FIRST)
		1793	{
		1794	if (ent->type == EIO_DT_UNKNOWN)
		1795	{
		1796	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
		1797	ent->score = 1;
		1798	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
		1799	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
		1800	}
		1801	else if (ent->type == EIO_DT_DIR)
		1802	ent->score = 0;
		1803	}
		1804	}
		1805
758	memofs += len;	1806	namesoffs += len;
		1807	++dentoffs;
		1808	}
		1809
		1810	if (EIO_CANCELLED (req))
		1811	{
		1812	errno = ECANCELED;
		1813	break;
759	}	1814	}
760	}	1815	}
761
762	if (errno)
763	res = -1;
764
765	req->result = res;
766	}	1816	}
767		1817
768	/*****************************************************************************/	1818	/*****************************************************************************/
769		1819
		1820	#define ALLOC(len) \
		1821	if (!req->ptr2) \
		1822	{ \
		1823	X_LOCK (wrklock); \
		1824	req->flags |= EIO_FLAG_PTR2_FREE; \
		1825	X_UNLOCK (wrklock); \
		1826	req->ptr2 = malloc (len); \
		1827	if (!req->ptr2) \
		1828	{ \
		1829	errno = ENOMEM; \
		1830	req->result = -1; \
		1831	break; \
		1832	} \
		1833	}
		1834
770	X_THREAD_PROC (eio_proc)	1835	X_THREAD_PROC (etp_proc)
771	{	1836	{
772	eio_req *req;	1837	ETP_REQ *req;
773	struct timespec ts;	1838	struct timespec ts;
774	worker *self = (worker *)thr_arg;	1839	etp_worker *self = (etp_worker *)thr_arg;
		1840	int timeout;
775		1841
776	/* try to distribute timeouts somewhat randomly */	1842	/* try to distribute timeouts somewhat evenly */
777	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1843	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
778		1844
779	for (;;)	1845	for (;;)
780	{	1846	{
781	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1847	ts.tv_sec = 0;
782		1848
783	X_LOCK (reqlock);	1849	X_LOCK (reqlock);
784		1850
785	for (;;)	1851	for (;;)
786	{	1852	{
787	self->req = req = reqq_shift (&req_queue);	1853	self->req = req = reqq_shift (&req_queue);
788		1854
789	if (req)	1855	if (req)
790	break;	1856	break;
791		1857
		1858	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
		1859	{
		1860	X_UNLOCK (reqlock);
		1861	X_LOCK (wrklock);
		1862	--started;
		1863	X_UNLOCK (wrklock);
		1864	goto quit;
		1865	}
		1866
792	++idle;	1867	++idle;
793		1868
794	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1869	if (idle <= max_idle)
		1870	/* we are allowed to idle, so do so without any timeout */
		1871	X_COND_WAIT (reqwait, reqlock);
		1872	else
795	{	1873	{
796	if (idle > max_idle)	1874	/* initialise timeout once */
797	{	1875	if (!ts.tv_sec)
798	--idle;	1876	ts.tv_sec = time (0) + idle_timeout;
799	X_UNLOCK (reqlock);
800	X_LOCK (wrklock);
801	--started;
802	X_UNLOCK (wrklock);
803	goto quit;
804	}
805		1877
806	/* we are allowed to idle, so do so without any timeout */
807	X_COND_WAIT (reqwait, reqlock);	1878	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
808	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1879	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
809	}	1880	}
810		1881
811	--idle;	1882	--idle;
812	}	1883	}
813		1884
814	--nready;	1885	--nready;
815		1886
816	X_UNLOCK (reqlock);	1887	X_UNLOCK (reqlock);
817		1888
818	errno = 0; /* strictly unnecessary */
819
820	if (!EIO_CANCELLED (req))
821	switch (req->type)	1889	if (req->type < 0)
822	{
823	case EIO_READ: req->result = req->offs >= 0
824	? pread (req->int1, req->ptr2, req->size, req->offs)
825	: read (req->int1, req->ptr2, req->size); break;
826	case EIO_WRITE: req->result = req->offs >= 0
827	? pwrite (req->int1, req->ptr2, req->size, req->offs)
828	: write (req->int1, req->ptr2, req->size); break;
829
830	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
831	case EIO_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
832
833	case EIO_STAT: req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
834	case EIO_LSTAT: req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
835	case EIO_FSTAT: req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
836
837	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
838	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
839	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
840	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
841	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
842	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
843
844	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
845	case EIO_CLOSE: req->result = close (req->int1); break;
846	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
847	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
848	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
849	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
850	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
851	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
852	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
853	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
854	case EIO_READLINK: req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
855
856	case EIO_SYNC: req->result = 0; sync (); break;
857	case EIO_FSYNC: req->result = fsync (req->int1); break;
858	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
859
860	case EIO_READDIR: scandir_ (req, self); break;
861
862	case EIO_BUSY:
863	#ifdef _WIN32
864	Sleep (req->nv1 * 1000.);
865	#else
866	{
867	struct timeval tv;
868
869	tv.tv_sec = req->nv1;
870	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
871
872	req->result = select (0, 0, 0, 0, &tv);
873	}
874	#endif
875	break;
876
877	case EIO_UTIME:
878	case EIO_FUTIME:
879	{
880	struct timeval tv[2];
881	struct timeval *times;
882
883	if (req->nv1 != -1. || req->nv2 != -1.)
884	{
885	tv[0].tv_sec = req->nv1;
886	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
887	tv[1].tv_sec = req->nv2;
888	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
889
890	times = tv;
891	}
892	else
893	times = 0;
894
895
896	req->result = req->type == EIO_FUTIME
897	? futimes (req->int1, times)
898	: utimes (req->ptr1, times);
899	}
900
901	case EIO_GROUP:
902	case EIO_NOP:
903	break;
904
905	case EIO_QUIT:
906	goto quit;	1890	goto quit;
907		1891
908	default:	1892	ETP_EXECUTE (self, req);
909	req->result = -1;
910	break;
911	}
912
913	req->errorno = errno;
914		1893
915	X_LOCK (reslock);	1894	X_LOCK (reslock);
916		1895
917	++npending;	1896	++npending;
918		1897
919	if (!reqq_push (&res_queue, req) && want_poll_cb)	1898	if (!reqq_push (&res_queue, req) && want_poll_cb)
920	want_poll_cb ();	1899	want_poll_cb ();
921		1900
922	self->req = 0;	1901	self->req = 0;
923	worker_clear (self);	1902	etp_worker_clear (self);
924		1903
925	X_UNLOCK (reslock);	1904	X_UNLOCK (reslock);
926	}	1905	}
927		1906
928	quit:	1907	quit:
929	X_LOCK (wrklock);	1908	X_LOCK (wrklock);
930	worker_free (self);	1909	etp_worker_free (self);
931	X_UNLOCK (wrklock);	1910	X_UNLOCK (wrklock);
932		1911
933	return 0;	1912	return 0;
934	}	1913	}
935		1914
936	/*****************************************************************************/	1915	/*****************************************************************************/
937		1916
938	static void eio_atfork_prepare (void)	1917	int ecb_cold
		1918	eio_init (void (*want_poll)(void), void (*done_poll)(void))
939	{	1919	{
940	X_LOCK (wrklock);	1920	return etp_init (want_poll, done_poll);
941	X_LOCK (reqlock);
942	X_LOCK (reslock);
943	#if !HAVE_PREADWRITE
944	X_LOCK (preadwritelock);
945	#endif
946	#if !HAVE_READDIR_R
947	X_LOCK (readdirlock);
948	#endif
949	}	1921	}
950		1922
951	static void eio_atfork_parent (void)	1923	ecb_inline void
		1924	eio_api_destroy (eio_req *req)
952	{	1925	{
953	#if !HAVE_READDIR_R	1926	free (req);
954	X_UNLOCK (readdirlock);
955	#endif
956	#if !HAVE_PREADWRITE
957	X_UNLOCK (preadwritelock);
958	#endif
959	X_UNLOCK (reslock);
960	X_UNLOCK (reqlock);
961	X_UNLOCK (wrklock);
962	}	1927	}
963		1928
964	static void eio_atfork_child (void)	1929	#define REQ(rtype) \
965	{	1930	eio_req *req; \
966	eio_req *prv;	1931	\
		1932	req = (eio_req *)calloc (1, sizeof *req); \
		1933	if (!req) \
		1934	return 0; \
		1935	\
		1936	req->type = rtype; \
		1937	req->pri = pri; \
		1938	req->finish = cb; \
		1939	req->data = data; \
		1940	req->destroy = eio_api_destroy;
967		1941
968	while (prv = reqq_shift (&req_queue))	1942	#define SEND eio_submit (req); return req
969	eio_destroy (prv);
970		1943
971	while (prv = reqq_shift (&res_queue))	1944	#define PATH \
972	eio_destroy (prv);	1945	req->flags |= EIO_FLAG_PTR1_FREE; \
		1946	req->ptr1 = strdup (path); \
		1947	if (!req->ptr1) \
		1948	{ \
		1949	eio_api_destroy (req); \
		1950	return 0; \
		1951	}
973		1952
974	while (wrk_first.next != &wrk_first)	1953	static void
		1954	eio_execute (etp_worker *self, eio_req *req)
		1955	{
		1956	if (ecb_expect_false (EIO_CANCELLED (req)))
975	{	1957	{
976	worker *wrk = wrk_first.next;	1958	req->result = -1;
		1959	req->errorno = ECANCELED;
		1960	return;
		1961	}
977		1962
978	if (wrk->req)	1963	switch (req->type)
979	eio_destroy (wrk->req);
980
981	worker_clear (wrk);
982	worker_free (wrk);
983	}	1964	{
		1965	case EIO_READ: ALLOC (req->size);
		1966	req->result = req->offs >= 0
		1967	? pread (req->int1, req->ptr2, req->size, req->offs)
		1968	: read (req->int1, req->ptr2, req->size); break;
		1969	case EIO_WRITE: req->result = req->offs >= 0
		1970	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		1971	: write (req->int1, req->ptr2, req->size); break;
984		1972
985	started = 0;	1973	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
986	idle = 0;	1974	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
987	nreqs = 0;
988	nready = 0;
989	npending = 0;
990		1975
991	eio_atfork_parent ();	1976	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
992	}	1977	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1978	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1979	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1980	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1981	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
993		1982
994	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1983	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
995	{	1984	req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
996	want_poll_cb = want_poll;	1985	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
997	done_poll_cb = done_poll;	1986	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
998		1987
		1988	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1989	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1990	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
		1991	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
		1992	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1993	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		1994
		1995	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
		1996	case EIO_CLOSE: req->result = close (req->int1); break;
		1997	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		1998	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		1999	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		2000	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		2001	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		2002	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		2003	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		2004	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
		2005
		2006	case EIO_REALPATH: eio__realpath (req, self); break;
		2007
		2008	case EIO_READLINK: ALLOC (PATH_MAX);
		2009	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
		2010
		2011	case EIO_SYNC: req->result = 0; sync (); break;
		2012	case EIO_FSYNC: req->result = fsync (req->int1); break;
		2013	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		2014	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
		2015	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
		2016	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
		2017	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
		2018	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		2019	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
		2020
		2021	case EIO_READDIR: eio__scandir (req, self); break;
		2022
		2023	case EIO_BUSY:
999	#ifdef _WIN32	2024	#ifdef _WIN32
1000	X_MUTEX_CHECK (wrklock);	2025	Sleep (req->nv1 * 1e3);
1001	X_MUTEX_CHECK (reslock);	2026	#else
1002	X_MUTEX_CHECK (reqlock);	2027	{
1003	X_MUTEX_CHECK (reqwait);	2028	struct timeval tv;
1004	X_MUTEX_CHECK (preadwritelock);
1005	X_MUTEX_CHECK (readdirlock);
1006		2029
1007	X_COND_CHECK (reqwait);	2030	tv.tv_sec = req->nv1;
1008	#endif	2031	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6;
1009		2032
1010	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);	2033	req->result = select (0, 0, 0, 0, &tv);
1011	}	2034	}
		2035	#endif
		2036	break;
1012		2037
1013	#if 0	2038	case EIO_UTIME:
		2039	case EIO_FUTIME:
		2040	{
		2041	struct timeval tv[2];
		2042	struct timeval *times;
1014		2043
		2044	if (req->nv1 != -1. || req->nv2 != -1.)
		2045	{
		2046	tv[0].tv_sec = req->nv1;
		2047	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		2048	tv[1].tv_sec = req->nv2;
		2049	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		2050
		2051	times = tv;
		2052	}
		2053	else
		2054	times = 0;
		2055
		2056	req->result = req->type == EIO_FUTIME
		2057	? futimes (req->int1, times)
		2058	: utimes (req->ptr1, times);
		2059	}
		2060	break;
		2061
		2062	case EIO_GROUP:
		2063	abort (); /* handled in eio_request */
		2064
		2065	case EIO_NOP:
		2066	req->result = 0;
		2067	break;
		2068
		2069	case EIO_CUSTOM:
		2070	req->feed (req);
		2071	break;
		2072
		2073	default:
		2074	errno = ENOSYS;
		2075	req->result = -1;
		2076	break;
		2077	}
		2078
		2079	req->errorno = errno;
		2080	}
		2081
		2082	#ifndef EIO_NO_WRAPPERS
		2083
		2084	eio_req *eio_nop (int pri, eio_cb cb, void *data)
		2085	{
		2086	REQ (EIO_NOP); SEND;
		2087	}
		2088
		2089	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
		2090	{
		2091	REQ (EIO_BUSY); req->nv1 = delay; SEND;
		2092	}
		2093
1015	eio_req *eio_fsync (int fd, eio_cb cb);	2094	eio_req *eio_sync (int pri, eio_cb cb, void *data)
		2095	{
		2096	REQ (EIO_SYNC); SEND;
		2097	}
		2098
		2099	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		2100	{
		2101	REQ (EIO_FSYNC); req->int1 = fd; SEND;
		2102	}
		2103
		2104	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2105	{
		2106	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2107	}
		2108
		2109	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2110	{
		2111	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2112	}
		2113
		2114	eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data)
		2115	{
		2116	REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND;
		2117	}
		2118
		2119	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
		2120	{
		2121	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
		2122	}
		2123
		2124	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		2125	{
		2126	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		2127	}
		2128
		2129	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
		2130	{
		2131	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
		2132	}
		2133
1016	eio_req *eio_fdatasync (int fd, eio_cb cb);	2134	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1017	eio_req *eio_dupclose (int fd, eio_cb cb);	2135	{
		2136	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
		2137	}
		2138
		2139	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		2140	{
		2141	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		2142	}
		2143
1018	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb);	2144	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
1019	eio_req *eio_read (int fd, off_t offs, size_t length, char *data, eio_cb cb);	2145	{
1020	eio_req *eio_write (int fd, off_t offs, size_t length, char *data, eio_cb cb);	2146	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
1021	eio_req *eio_fstat (int fd, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */	2147	}
		2148
		2149	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		2150	{
		2151	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		2152	}
		2153
		2154	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		2155	{
		2156	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		2157	}
		2158
		2159	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
		2160	{
		2161	REQ (EIO_FSTAT); req->int1 = fd; SEND;
		2162	}
		2163
		2164	eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data)
		2165	{
		2166	REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
		2167	}
		2168
1022	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb);	2169	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
		2170	{
		2171	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
		2172	}
		2173
1023	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb);	2174	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
		2175	{
		2176	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
		2177	}
		2178
1024	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb);	2179	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
		2180	{
		2181	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
		2182	}
		2183
1025	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb);	2184	eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
		2185	{
		2186	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		2187	}
		2188
1026	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb);	2189	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
		2190	{
		2191	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
		2192	}
		2193
1027	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb);	2194	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
		2195	{
		2196	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
		2197	}
		2198
1028	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb);	2199	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
1029	eio_req *eio_readlink (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */	2200	{
1030	eio_req *eio_stat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */	2201	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
1031	eio_req *eio_lstat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */	2202	}
		2203
1032	eio_req *eio_utime (const char *path, double atime, double mtime, eio_cb cb);	2204	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
		2205	{
		2206	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
		2207	}
		2208
1033	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb);	2209	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
		2210	{
		2211	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
		2212	}
		2213
		2214	eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
		2215	{
		2216	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		2217	}
		2218
1034	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb);	2219	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
		2220	{
		2221	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
		2222	}
		2223
1035	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb);	2224	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1036	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb);	2225	{
		2226	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
		2227	}
		2228
		2229	static eio_req *
		2230	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
		2231	{
		2232	REQ (type); PATH; SEND;
		2233	}
		2234
		2235	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		2236	{
		2237	return eio__1path (EIO_READLINK, path, pri, cb, data);
		2238	}
		2239
		2240	eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
		2241	{
		2242	return eio__1path (EIO_REALPATH, path, pri, cb, data);
		2243	}
		2244
		2245	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		2246	{
		2247	return eio__1path (EIO_STAT, path, pri, cb, data);
		2248	}
		2249
		2250	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		2251	{
		2252	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		2253	}
		2254
		2255	eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data)
		2256	{
		2257	return eio__1path (EIO_STATVFS, path, pri, cb, data);
		2258	}
		2259
1037	eio_req *eio_unlink (const char *path, eio_cb cb);	2260	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		2261	{
		2262	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		2263	}
		2264
1038	eio_req *eio_rmdir (const char *path, eio_cb cb);	2265	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
1039	eio_req *eio_readdir (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */	2266	{
		2267	return eio__1path (EIO_RMDIR, path, pri, cb, data);
		2268	}
		2269
		2270	eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data)
		2271	{
		2272	REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
		2273	}
		2274
1040	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb);	2275	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1041	eio_req *eio_busy (double delay, eio_cb cb); /* ties a thread for this long, simulating busyness */	2276	{
1042	eio_req *eio_nop (eio_cb cb); /* does nothing except go through the whole process */	2277	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND;
		2278	}
		2279
		2280	static eio_req *
		2281	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2282	{
		2283	REQ (type); PATH;
		2284
		2285	req->flags |= EIO_FLAG_PTR2_FREE;
		2286	req->ptr2 = strdup (new_path);
		2287	if (!req->ptr2)
		2288	{
		2289	eio_api_destroy (req);
		2290	return 0;
		2291	}
		2292
		2293	SEND;
		2294	}
		2295
		2296	eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2297	{
		2298	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
		2299	}
		2300
		2301	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2302	{
		2303	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
		2304	}
		2305
		2306	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2307	{
		2308	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
		2309	}
		2310
		2311	eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
		2312	{
		2313	REQ (EIO_CUSTOM); req->feed = execute; SEND;
		2314	}
		2315
		2316	#endif
		2317
		2318	eio_req *eio_grp (eio_cb cb, void *data)
		2319	{
		2320	const int pri = EIO_PRI_MAX;
		2321
		2322	REQ (EIO_GROUP); SEND;
		2323	}
		2324
		2325	#undef REQ
		2326	#undef PATH
		2327	#undef SEND
		2328
		2329	/*****************************************************************************/
		2330	/* grp functions */
		2331
1043	void	2332	void
1044	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1045	PROTOTYPE: $$$;$
1046	PPCODE:
1047	{
1048	dREQ;
1049
1050	req->type = EIO_OPEN;
1051	req->sv1 = newSVsv (pathname);
1052	req->ptr1 = SvPVbyte_nolen (req->sv1);
1053	req->int1 = flags;
1054	req->int2 = mode;
1055
1056	EIO_SEND;
1057	}
1058
1059	void
1060	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1061	PROTOTYPE: $;$
1062	ALIAS:
1063	aio_fsync = EIO_FSYNC
1064	aio_fdatasync = EIO_FDATASYNC
1065	PPCODE:
1066	{
1067	dREQ;
1068
1069	req->type = ix;
1070	req->sv1 = newSVsv (fh);
1071	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1072
1073	EIO_SEND (req);
1074	}
1075
1076	void
1077	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1078	PROTOTYPE: $;$
1079	PPCODE:
1080	{
1081	dREQ;
1082
1083	req->type = EIO_CLOSE;
1084	req->sv1 = newSVsv (fh);
1085	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1086
1087	EIO_SEND (req);
1088	}
1089
1090	void
1091	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1092	ALIAS:
1093	aio_read = EIO_READ
1094	aio_write = EIO_WRITE
1095	PROTOTYPE: $$$$$;$
1096	PPCODE:
1097	{
1098	STRLEN svlen;
1099	char *svptr = SvPVbyte (data, svlen);
1100	UV len = SvUV (length);
1101
1102	SvUPGRADE (data, SVt_PV);
1103	SvPOK_on (data);
1104
1105	if (dataoffset < 0)
1106	dataoffset += svlen;
1107
1108	if (dataoffset < 0 || dataoffset > svlen)
1109	croak ("dataoffset outside of data scalar");
1110
1111	if (ix == EIO_WRITE)
1112	{
1113	/* write: check length and adjust. */
1114	if (!SvOK (length) || len + dataoffset > svlen)
1115	len = svlen - dataoffset;
1116	}
1117	else
1118	{
1119	/* read: grow scalar as necessary */
1120	svptr = SvGROW (data, len + dataoffset + 1);
1121	}
1122
1123	if (len < 0)
1124	croak ("length must not be negative");
1125
1126	{
1127	dREQ;
1128
1129	req->type = ix;
1130	req->sv1 = newSVsv (fh);
1131	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1132	: IoOFP (sv_2io (fh)));
1133	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1134	req->size = len;
1135	req->sv2 = SvREFCNT_inc (data);
1136	req->ptr2 = (char *)svptr + dataoffset;
1137	req->stroffset = dataoffset;
1138
1139	if (!SvREADONLY (data))
1140	{
1141	SvREADONLY_on (data);
1142	req->flags |= FLAG_SV2_RO_OFF;
1143	}
1144
1145	EIO_SEND;
1146	}
1147	}
1148
1149	void
1150	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1151	PROTOTYPE: $$;$
1152	PPCODE:
1153	{
1154	SV *data;
1155	dREQ;
1156
1157	data = newSV (NAME_MAX);
1158	SvPOK_on (data);
1159
1160	req->type = EIO_READLINK;
1161	req->sv1 = newSVsv (path);
1162	req->ptr1 = SvPVbyte_nolen (req->sv1);
1163	req->sv2 = data;
1164	req->ptr2 = SvPVbyte_nolen (data);
1165
1166	EIO_SEND;
1167	}
1168
1169	void
1170	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1171	PROTOTYPE: $$$$;$
1172	PPCODE:
1173	{
1174	dREQ;
1175
1176	req->type = EIO_SENDFILE;
1177	req->sv1 = newSVsv (out_fh);
1178	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1179	req->sv2 = newSVsv (in_fh);
1180	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1181	req->offs = SvVAL64 (in_offset);
1182	req->size = length;
1183
1184	EIO_SEND;
1185	}
1186
1187	void
1188	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1189	PROTOTYPE: $$$;$
1190	PPCODE:
1191	{
1192	dREQ;
1193
1194	req->type = EIO_READAHEAD;
1195	req->sv1 = newSVsv (fh);
1196	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1197	req->offs = SvVAL64 (offset);
1198	req->size = length;
1199
1200	EIO_SEND;
1201	}
1202
1203	void
1204	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1205	ALIAS:
1206	aio_stat = EIO_STAT
1207	aio_lstat = EIO_LSTAT
1208	PPCODE:
1209	{
1210	dREQ;
1211
1212	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1213	if (!req->ptr2)
1214	{
1215	req_destroy (req);
1216	croak ("out of memory during aio_stat statdata allocation");
1217	}
1218
1219	req->flags |= FLAG_PTR2_FREE;
1220	req->sv1 = newSVsv (fh_or_path);
1221
1222	if (SvPOK (fh_or_path))
1223	{
1224	req->type = ix;
1225	req->ptr1 = SvPVbyte_nolen (req->sv1);
1226	}
1227	else
1228	{
1229	req->type = EIO_FSTAT;
1230	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1231	}
1232
1233	EIO_SEND;
1234	}
1235
1236	void
1237	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1238	PPCODE:
1239	{
1240	dREQ;
1241
1242	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1243	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1244	req->sv1 = newSVsv (fh_or_path);
1245
1246	if (SvPOK (fh_or_path))
1247	{
1248	req->type = EIO_UTIME;
1249	req->ptr1 = SvPVbyte_nolen (req->sv1);
1250	}
1251	else
1252	{
1253	req->type = EIO_FUTIME;
1254	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1255	}
1256
1257	EIO_SEND;
1258	}
1259
1260	void
1261	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1262	PPCODE:
1263	{
1264	dREQ;
1265
1266	req->sv1 = newSVsv (fh_or_path);
1267	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1268
1269	if (SvPOK (fh_or_path))
1270	{
1271	req->type = EIO_TRUNCATE;
1272	req->ptr1 = SvPVbyte_nolen (req->sv1);
1273	}
1274	else
1275	{
1276	req->type = EIO_FTRUNCATE;
1277	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1278	}
1279
1280	EIO_SEND;
1281	}
1282
1283	void
1284	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1285	ALIAS:
1286	aio_chmod = EIO_CHMOD
1287	aio_fchmod = EIO_FCHMOD
1288	aio_mkdir = EIO_MKDIR
1289	PPCODE:
1290	{
1291	dREQ;
1292
1293	req->type = type;
1294	req->int2 = mode;
1295	req->sv1 = newSVsv (fh_or_path);
1296
1297	if (ix == EIO_FCHMOD)
1298	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1299	else
1300	req->ptr1 = SvPVbyte_nolen (req->sv1);
1301
1302	EIO_SEND;
1303	}
1304
1305	void
1306	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1307	PPCODE:
1308	{
1309	dREQ;
1310
1311	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1312	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1313	req->sv1 = newSVsv (fh_or_path);
1314
1315	if (SvPOK (fh_or_path))
1316	{
1317	req->type = EIO_CHOWN;
1318	req->ptr1 = SvPVbyte_nolen (req->sv1);
1319	}
1320	else
1321	{
1322	req->type = EIO_FCHOWN;
1323	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1324	}
1325
1326	EIO_SEND;
1327	}
1328
1329	void
1330	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1331	ALIAS:
1332	aio_unlink = EIO_UNLINK
1333	aio_rmdir = EIO_RMDIR
1334	aio_readdir = EIO_READDIR
1335	PPCODE:
1336	{
1337	dREQ;
1338
1339	req->type = ix;
1340	req->sv1 = newSVsv (pathname);
1341	req->ptr1 = SvPVbyte_nolen (req->sv1);
1342
1343	EIO_SEND;
1344	}
1345
1346	void
1347	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1348	ALIAS:
1349	aio_link = EIO_LINK
1350	aio_symlink = EIO_SYMLINK
1351	aio_rename = EIO_RENAME
1352	PPCODE:
1353	{
1354	dREQ;
1355
1356	req->type = ix;
1357	req->sv1 = newSVsv (oldpath);
1358	req->ptr1 = SvPVbyte_nolen (req->sv1);
1359	req->sv2 = newSVsv (newpath);
1360	req->ptr2 = SvPVbyte_nolen (req->sv2);
1361
1362	EIO_SEND;
1363	}
1364
1365	void
1366	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1367	PPCODE:
1368	{
1369	dREQ;
1370
1371	req->type = EIO_MKNOD;
1372	req->sv1 = newSVsv (pathname);
1373	req->ptr1 = SvPVbyte_nolen (req->sv1);
1374	req->int2 = (mode_t)mode;
1375	req->offs = dev;
1376
1377	EIO_SEND;
1378	}
1379
1380	void
1381	aio_busy (double delay, SV *callback=&PL_sv_undef)
1382	PPCODE:
1383	{
1384	dREQ;
1385
1386	req->type = EIO_BUSY;
1387	req->nv1 = delay < 0. ? 0. : delay;
1388
1389	EIO_SEND;
1390	}
1391
1392	void
1393	aio_group (SV *callback=&PL_sv_undef)
1394	PROTOTYPE: ;$
1395	PPCODE:
1396	{
1397	dREQ;
1398
1399	req->type = EIO_GROUP;
1400
1401	req_send (req);
1402	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1403	}
1404
1405	void
1406	aio_nop (SV *callback=&PL_sv_undef)
1407	ALIAS:
1408	aio_nop = EIO_NOP
1409	aio_sync = EIO_SYNC
1410	PPCODE:
1411	{
1412	dREQ;
1413
1414	#endif
1415
1416	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	2333	eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1417	{	2334	{
1418	grp->int2 = limit;	2335	grp->int2 = limit;
1419	grp->feed = feed;	2336	grp->feed = feed;
1420		2337
1421	grp_try_feed (grp);	2338	grp_try_feed (grp);
1422	}	2339	}
1423		2340
		2341	void
1424	void eio_grp_limit (eio_req *grp, int limit)	2342	eio_grp_limit (eio_req *grp, int limit)
1425	{	2343	{
1426	grp->int2 = limit;	2344	grp->int2 = limit;
1427		2345
1428	grp_try_feed (grp);	2346	grp_try_feed (grp);
1429	}	2347	}
1430		2348
		2349	void
1431	void eio_grp_add (eio_req *grp, eio_req *req)	2350	eio_grp_add (eio_req *grp, eio_req *req)
1432	{	2351	{
1433	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2352	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
		2353
		2354	grp->flags |= EIO_FLAG_GROUPADD;
1434		2355
1435	++grp->size;	2356	++grp->size;
1436	req->grp = grp;	2357	req->grp = grp;
1437		2358
1438	req->grp_prev = 0;	2359	req->grp_prev = 0;
…		…
1442	grp->grp_first->grp_prev = req;	2363	grp->grp_first->grp_prev = req;
1443		2364
1444	grp->grp_first = req;	2365	grp->grp_first = req;
1445	}	2366	}
1446		2367
		2368	/*****************************************************************************/
		2369	/* misc garbage */
1447		2370
		2371	eio_ssize_t
		2372	eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		2373	{
		2374	etp_worker wrk;
		2375	eio_ssize_t ret;
		2376
		2377	wrk.dbuf = 0;
		2378
		2379	ret = eio__sendfile (ofd, ifd, offset, count, &wrk);
		2380
		2381	if (wrk.dbuf)
		2382	free (wrk.dbuf);
		2383
		2384	return ret;
		2385	}
		2386

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