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Comparing libeio/eio.c (file contents):
Revision 1.10 by root, Tue May 13 17:08:15 2008 UTC vs.
Revision 1.33 by root, Sat Jun 6 19:44:17 2009 UTC

		1	/*
		2	* libeio implementation
		3	*
		4	* Copyright (c) 2007,2008,2009 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
1	#include "eio.h"	40	#include "eio.h"
		41
		42	#ifdef EIO_STACKSIZE
		43	# define XTHREAD_STACKSIZE EIO_STACKSIZE
		44	#endif
2	#include "xthread.h"	45	#include "xthread.h"
3		46
4	#include <errno.h>	47	#include <errno.h>
5	#include <stddef.h>	48	#include <stddef.h>
6	#include <stdlib.h>	49	#include <stdlib.h>
…		…
25	#endif	68	#endif
26		69
27	#ifdef _WIN32	70	#ifdef _WIN32
28		71
29	/*doh*/	72	/*doh*/
30
31	#else	73	#else
32		74
33	# include "config.h"	75	# include "config.h"
34	# include <sys/time.h>	76	# include <sys/time.h>
35	# include <sys/select.h>	77	# include <sys/select.h>
36	# include <unistd.h>	78	# include <unistd.h>
37	# include <utime.h>	79	# include <utime.h>
38	# include <signal.h>	80	# include <signal.h>
39	# include <dirent.h>	81	# include <dirent.h>
		82
		83	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
		84	# if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
		85	# define _DIRENT_HAVE_D_TYPE /* sigh */
		86	# define D_INO(de) (de)->d_fileno
		87	# define D_NAMLEN(de) (de)->d_namlen
		88	# elif defined(__linux) || defined(d_ino) || _XOPEN_SOURCE >= 600
		89	# define D_INO(de) (de)->d_ino
		90	# endif
		91
		92	#ifdef _D_EXACT_NAMLEN
		93	# undef D_NAMLEN
		94	# define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
		95	#endif
		96
		97	# ifdef _DIRENT_HAVE_D_TYPE
		98	# define D_TYPE(de) (de)->d_type
		99	# endif
40		100
41	# ifndef EIO_STRUCT_DIRENT	101	# ifndef EIO_STRUCT_DIRENT
42	# define EIO_STRUCT_DIRENT struct dirent	102	# define EIO_STRUCT_DIRENT struct dirent
43	# endif	103	# endif
44		104
…		…
57	# else	117	# else
58	# error sendfile support requested but not available	118	# error sendfile support requested but not available
59	# endif	119	# endif
60	#endif	120	#endif
61		121
		122	#ifndef D_TYPE
		123	# define D_TYPE(de) 0
		124	#endif
		125	#ifndef D_INO
		126	# define D_INO(de) 0
		127	#endif
		128	#ifndef D_NAMLEN
		129	# define D_NAMLEN(de) strlen ((de)->d_name)
		130	#endif
		131
62	/* number of seconds after which an idle threads exit */	132	/* number of seconds after which an idle threads exit */
63	#define IDLE_TIMEOUT 10	133	#define IDLE_TIMEOUT 10
64		134
65	/* used for struct dirent, AIX doesn't provide it */	135	/* used for struct dirent, AIX doesn't provide it */
66	#ifndef NAME_MAX	136	#ifndef NAME_MAX
…		…
70	/* buffer size for various temporary buffers */	140	/* buffer size for various temporary buffers */
71	#define EIO_BUFSIZE 65536	141	#define EIO_BUFSIZE 65536
72		142
73	#define dBUF \	143	#define dBUF \
74	char *eio_buf; \	144	char *eio_buf; \
75	X_LOCK (wrklock); \	145	ETP_WORKER_LOCK (self); \
76	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	146	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \
77	X_UNLOCK (wrklock); \	147	ETP_WORKER_UNLOCK (self); \
78	errno = ENOMEM; \	148	errno = ENOMEM; \
79	if (!eio_buf) \	149	if (!eio_buf) \
80	return -1;	150	return -1;
81		151
82	#define EIO_TICKS ((1000000 + 1023) >> 10)	152	#define EIO_TICKS ((1000000 + 1023) >> 10)
83		153
		154	/*****************************************************************************/
		155
		156	#if __GNUC__ >= 3
		157	# define expect(expr,value) __builtin_expect ((expr),(value))
		158	#else
		159	# define expect(expr,value) (expr)
		160	#endif
		161
		162	#define expect_false(expr) expect ((expr) != 0, 0)
		163	#define expect_true(expr) expect ((expr) != 0, 1)
		164
		165	/*****************************************************************************/
		166
		167	#define ETP_PRI_MIN EIO_PRI_MIN
		168	#define ETP_PRI_MAX EIO_PRI_MAX
		169
		170	struct etp_worker;
		171
		172	#define ETP_REQ eio_req
		173	#define ETP_DESTROY(req) eio_destroy (req)
		174	static int eio_finish (eio_req *req);
		175	#define ETP_FINISH(req) eio_finish (req)
		176	static void eio_execute (struct etp_worker *self, eio_req *req);
		177	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		178
		179	#define ETP_WORKER_CLEAR(req) \
		180	if (wrk->dbuf) \
		181	{ \
		182	free (wrk->dbuf); \
		183	wrk->dbuf = 0; \
		184	} \
		185	\
		186	if (wrk->dirp) \
		187	{ \
		188	closedir (wrk->dirp); \
		189	wrk->dirp = 0; \
		190	}
		191
		192	#define ETP_WORKER_COMMON \
		193	void *dbuf; \
		194	DIR *dirp;
		195
		196	/*****************************************************************************/
		197
		198	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		199
		200	/* calculcate time difference in ~1/EIO_TICKS of a second */
		201	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		202	{
		203	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		204	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		205	}
		206
		207	static unsigned int started, idle, wanted = 4;
		208
84	static void (*want_poll_cb) (void);	209	static void (*want_poll_cb) (void);
85	static void (*done_poll_cb) (void);	210	static void (*done_poll_cb) (void);
86		211
87	static unsigned int max_poll_time = 0;	212	static unsigned int max_poll_time; /* reslock */
88	static unsigned int max_poll_reqs = 0;	213	static unsigned int max_poll_reqs; /* reslock */
89		214
90	/* calculcate time difference in ~1/EIO_TICKS of a second */	215	static volatile unsigned int nreqs; /* reqlock */
91	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	216	static volatile unsigned int nready; /* reqlock */
92	{	217	static volatile unsigned int npending; /* reqlock */
93	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	218	static volatile unsigned int max_idle = 4;
94	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
95	}
96		219
97	static unsigned int started, idle, wanted = 4;
98
99	/* worker threads management */
100	static mutex_t wrklock = X_MUTEX_INIT;	220	static mutex_t wrklock = X_MUTEX_INIT;
101
102	typedef struct worker
103	{
104	/* locked by wrklock */
105	struct worker *prev, *next;
106
107	thread_t tid;
108
109	/* locked by reslock, reqlock or wrklock */
110	eio_req *req; /* currently processed request */
111	void *dbuf;
112	DIR *dirp;
113	} worker;
114
115	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
116
117	static void worker_clear (worker *wrk)
118	{
119	if (wrk->dirp)
120	{
121	closedir (wrk->dirp);
122	wrk->dirp = 0;
123	}
124
125	if (wrk->dbuf)
126	{
127	free (wrk->dbuf);
128	wrk->dbuf = 0;
129	}
130	}
131
132	static void worker_free (worker *wrk)
133	{
134	wrk->next->prev = wrk->prev;
135	wrk->prev->next = wrk->next;
136
137	free (wrk);
138	}
139
140	static volatile unsigned int nreqs, nready, npending;
141	static volatile unsigned int max_idle = 4;
142
143	static mutex_t reslock = X_MUTEX_INIT;	221	static mutex_t reslock = X_MUTEX_INIT;
144	static mutex_t reqlock = X_MUTEX_INIT;	222	static mutex_t reqlock = X_MUTEX_INIT;
145	static cond_t reqwait = X_COND_INIT;	223	static cond_t reqwait = X_COND_INIT;
146		224
		225	#if !HAVE_PREADWRITE
		226	/*
		227	* make our pread/pwrite emulation safe against themselves, but not against
		228	* normal read/write by using a mutex. slows down execution a lot,
		229	* but that's your problem, not mine.
		230	*/
		231	static mutex_t preadwritelock = X_MUTEX_INIT;
		232	#endif
		233
		234	typedef struct etp_worker
		235	{
		236	/* locked by wrklock */
		237	struct etp_worker *prev, *next;
		238
		239	thread_t tid;
		240
		241	/* locked by reslock, reqlock or wrklock */
		242	ETP_REQ *req; /* currently processed request */
		243
		244	ETP_WORKER_COMMON
		245	} etp_worker;
		246
		247	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
		248
		249	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		250	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
		251
		252	/* worker threads management */
		253
		254	static void etp_worker_clear (etp_worker *wrk)
		255	{
		256	ETP_WORKER_CLEAR (wrk);
		257	}
		258
		259	static void etp_worker_free (etp_worker *wrk)
		260	{
		261	wrk->next->prev = wrk->prev;
		262	wrk->prev->next = wrk->next;
		263
		264	free (wrk);
		265	}
		266
147	unsigned int eio_nreqs (void)	267	static unsigned int etp_nreqs (void)
148	{	268	{
		269	int retval;
		270	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		271	retval = nreqs;
		272	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
149	return nreqs;	273	return retval;
150	}	274	}
151		275
152	unsigned int eio_nready (void)	276	static unsigned int etp_nready (void)
153	{	277	{
154	unsigned int retval;	278	unsigned int retval;
155		279
156	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	280	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
157	retval = nready;	281	retval = nready;
158	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	282	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
159		283
160	return retval;	284	return retval;
161	}	285	}
162		286
163	unsigned int eio_npending (void)	287	static unsigned int etp_npending (void)
164	{	288	{
165	unsigned int retval;	289	unsigned int retval;
166		290
167	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	291	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
168	retval = npending;	292	retval = npending;
169	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	293	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
170		294
171	return retval;	295	return retval;
172	}	296	}
173		297
174	unsigned int eio_nthreads (void)	298	static unsigned int etp_nthreads (void)
175	{	299	{
176	unsigned int retval;	300	unsigned int retval;
177		301
178	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	302	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
179	retval = started;	303	retval = started;
…		…
186	* a somewhat faster data structure might be nice, but	310	* a somewhat faster data structure might be nice, but
187	* with 8 priorities this actually needs <20 insns	311	* with 8 priorities this actually needs <20 insns
188	* per shift, the most expensive operation.	312	* per shift, the most expensive operation.
189	*/	313	*/
190	typedef struct {	314	typedef struct {
191	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	315	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
192	int size;	316	int size;
193	} reqq;	317	} etp_reqq;
194		318
195	static reqq req_queue;	319	static etp_reqq req_queue;
196	static reqq res_queue;	320	static etp_reqq res_queue;
197		321
198	static int reqq_push (reqq *q, eio_req *req)	322	static int reqq_push (etp_reqq *q, ETP_REQ *req)
199	{	323	{
200	int pri = req->pri;	324	int pri = req->pri;
201	req->next = 0;	325	req->next = 0;
202		326
203	if (q->qe[pri])	327	if (q->qe[pri])
…		…
209	q->qe[pri] = q->qs[pri] = req;	333	q->qe[pri] = q->qs[pri] = req;
210		334
211	return q->size++;	335	return q->size++;
212	}	336	}
213		337
214	static eio_req *reqq_shift (reqq *q)	338	static ETP_REQ *reqq_shift (etp_reqq *q)
215	{	339	{
216	int pri;	340	int pri;
217		341
218	if (!q->size)	342	if (!q->size)
219	return 0;	343	return 0;
220		344
221	--q->size;	345	--q->size;
222		346
223	for (pri = EIO_NUM_PRI; pri--; )	347	for (pri = ETP_NUM_PRI; pri--; )
224	{	348	{
225	eio_req *req = q->qs[pri];	349	eio_req *req = q->qs[pri];
226		350
227	if (req)	351	if (req)
228	{	352	{
…		…
234	}	358	}
235		359
236	abort ();	360	abort ();
237	}	361	}
238		362
239	static void grp_try_feed (eio_req *grp)	363	static void etp_atfork_prepare (void)
240	{	364	{
241	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	365	X_LOCK (wrklock);
		366	X_LOCK (reqlock);
		367	X_LOCK (reslock);
		368	#if !HAVE_PREADWRITE
		369	X_LOCK (preadwritelock);
		370	#endif
		371	}
		372
		373	static void etp_atfork_parent (void)
		374	{
		375	#if !HAVE_PREADWRITE
		376	X_UNLOCK (preadwritelock);
		377	#endif
		378	X_UNLOCK (reslock);
		379	X_UNLOCK (reqlock);
		380	X_UNLOCK (wrklock);
		381	}
		382
		383	static void etp_atfork_child (void)
		384	{
		385	ETP_REQ *prv;
		386
		387	while ((prv = reqq_shift (&req_queue)))
		388	ETP_DESTROY (prv);
		389
		390	while ((prv = reqq_shift (&res_queue)))
		391	ETP_DESTROY (prv);
		392
		393	while (wrk_first.next != &wrk_first)
242	{	394	{
243	int old_len = grp->size;	395	etp_worker *wrk = wrk_first.next;
244		396
245	EIO_FEED (grp);	397	if (wrk->req)
		398	ETP_DESTROY (wrk->req);
246		399
247	/* stop if no progress has been made */	400	etp_worker_clear (wrk);
248	if (old_len == grp->size)	401	etp_worker_free (wrk);
249	{
250	grp->feed = 0;
251	break;
252	}
253	}	402	}
254	}
255		403
256	static int eio_finish (eio_req *req);	404	started = 0;
		405	idle = 0;
		406	nreqs = 0;
		407	nready = 0;
		408	npending = 0;
257		409
258	static int grp_dec (eio_req *grp)	410	etp_atfork_parent ();
259	{	411	}
260	--grp->size;
261		412
262	/* call feeder, if applicable */	413	static void
263	grp_try_feed (grp);	414	etp_once_init (void)
		415	{
		416	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
		417	}
264		418
265	/* finish, if done */	419	static int
266	if (!grp->size && grp->int1)	420	etp_init (void (*want_poll)(void), void (*done_poll)(void))
267	return eio_finish (grp);	421	{
268	else	422	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
		423
		424	pthread_once (&doinit, etp_once_init);
		425
		426	want_poll_cb = want_poll;
		427	done_poll_cb = done_poll;
		428
269	return 0;	429	return 0;
270	}	430	}
271		431
272	void eio_destroy (eio_req *req)
273	{
274	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
275	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
276
277	EIO_DESTROY (req);
278	}
279
280	static int eio_finish (eio_req *req)
281	{
282	int res = EIO_FINISH (req);
283
284	if (req->grp)
285	{
286	int res2;
287	eio_req *grp = req->grp;
288
289	/* unlink request */
290	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
291	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
292
293	if (grp->grp_first == req)
294	grp->grp_first = req->grp_next;
295
296	res2 = grp_dec (grp);
297
298	if (!res && res2)
299	res = res2;
300	}
301
302	eio_destroy (req);
303
304	return res;
305	}
306
307	void eio_grp_cancel (eio_req *grp)
308	{
309	for (grp = grp->grp_first; grp; grp = grp->grp_next)
310	eio_cancel (grp);
311	}
312
313	void eio_cancel (eio_req *req)
314	{
315	X_LOCK (wrklock);
316	req->flags |= EIO_FLAG_CANCELLED;
317	X_UNLOCK (wrklock);
318
319	eio_grp_cancel (req);
320	}
321
322	X_THREAD_PROC (eio_proc);	432	X_THREAD_PROC (etp_proc);
323		433
324	static void start_thread (void)	434	static void etp_start_thread (void)
325	{	435	{
326	worker *wrk = calloc (1, sizeof (worker));	436	etp_worker *wrk = calloc (1, sizeof (etp_worker));
327		437
328	/*TODO*/	438	/*TODO*/
329	assert (("unable to allocate worker thread data", wrk));	439	assert (("unable to allocate worker thread data", wrk));
330		440
331	X_LOCK (wrklock);	441	X_LOCK (wrklock);
332		442
333	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	443	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
334	{	444	{
335	wrk->prev = &wrk_first;	445	wrk->prev = &wrk_first;
336	wrk->next = wrk_first.next;	446	wrk->next = wrk_first.next;
337	wrk_first.next->prev = wrk;	447	wrk_first.next->prev = wrk;
338	wrk_first.next = wrk;	448	wrk_first.next = wrk;
…		…
342	free (wrk);	452	free (wrk);
343		453
344	X_UNLOCK (wrklock);	454	X_UNLOCK (wrklock);
345	}	455	}
346		456
347	static void maybe_start_thread (void)	457	static void etp_maybe_start_thread (void)
348	{	458	{
349	if (eio_nthreads () >= wanted)	459	if (expect_true (etp_nthreads () >= wanted))
350	return;	460	return;
351		461
352	/* todo: maybe use idle here, but might be less exact */	462	/* todo: maybe use idle here, but might be less exact */
353	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	463	if (expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
354	return;	464	return;
355		465
356	start_thread ();	466	etp_start_thread ();
357	}	467	}
358		468
359	void eio_submit (eio_req *req)
360	{
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)	469	static void etp_end_thread (void)
373	{	470	{
374	eio_req *req = calloc (1, sizeof (eio_req));	471	eio_req *req = calloc (1, sizeof (eio_req));
375		472
376	req->type = EIO_QUIT;	473	req->type = -1;
377	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	474	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
378		475
379	X_LOCK (reqlock);	476	X_LOCK (reqlock);
380	reqq_push (&req_queue, req);	477	reqq_push (&req_queue, req);
381	X_COND_SIGNAL (reqwait);	478	X_COND_SIGNAL (reqwait);
382	X_UNLOCK (reqlock);	479	X_UNLOCK (reqlock);
…		…
384	X_LOCK (wrklock);	481	X_LOCK (wrklock);
385	--started;	482	--started;
386	X_UNLOCK (wrklock);	483	X_UNLOCK (wrklock);
387	}	484	}
388		485
389	void eio_set_max_poll_time (double nseconds)
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)	486	static int etp_poll (void)
426	{	487	{
427	int maxreqs = max_poll_reqs;	488	unsigned int maxreqs;
		489	unsigned int maxtime;
428	struct timeval tv_start, tv_now;	490	struct timeval tv_start, tv_now;
429	eio_req *req;
430		491
		492	X_LOCK (reslock);
		493	maxreqs = max_poll_reqs;
		494	maxtime = max_poll_time;
		495	X_UNLOCK (reslock);
		496
431	if (max_poll_time)	497	if (maxtime)
432	gettimeofday (&tv_start, 0);	498	gettimeofday (&tv_start, 0);
433		499
434	for (;;)	500	for (;;)
435	{	501	{
		502	ETP_REQ *req;
		503
436	maybe_start_thread ();	504	etp_maybe_start_thread ();
437		505
438	X_LOCK (reslock);	506	X_LOCK (reslock);
439	req = reqq_shift (&res_queue);	507	req = reqq_shift (&res_queue);
440		508
441	if (req)	509	if (req)
…		…
449	X_UNLOCK (reslock);	517	X_UNLOCK (reslock);
450		518
451	if (!req)	519	if (!req)
452	return 0;	520	return 0;
453		521
		522	X_LOCK (reqlock);
454	--nreqs;	523	--nreqs;
		524	X_UNLOCK (reqlock);
455		525
456	if (req->type == EIO_GROUP && req->size)	526	if (expect_false (req->type == EIO_GROUP && req->size))
457	{	527	{
458	req->int1 = 1; /* mark request as delayed */	528	req->int1 = 1; /* mark request as delayed */
459	continue;	529	continue;
460	}	530	}
461	else	531	else
462	{	532	{
463	int res = eio_finish (req);	533	int res = ETP_FINISH (req);
464	if (res)	534	if (expect_false (res))
465	return res;	535	return res;
466	}	536	}
467		537
468	if (maxreqs && !--maxreqs)	538	if (expect_false (maxreqs && !--maxreqs))
469	break;	539	break;
470		540
471	if (max_poll_time)	541	if (maxtime)
472	{	542	{
473	gettimeofday (&tv_now, 0);	543	gettimeofday (&tv_now, 0);
474		544
475	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	545	if (tvdiff (&tv_start, &tv_now) >= maxtime)
476	break;	546	break;
477	}	547	}
478	}	548	}
479		549
480	errno = EAGAIN;	550	errno = EAGAIN;
481	return -1;	551	return -1;
482	}	552	}
483		553
		554	static void etp_cancel (ETP_REQ *req)
		555	{
		556	X_LOCK (wrklock);
		557	req->flags |= EIO_FLAG_CANCELLED;
		558	X_UNLOCK (wrklock);
		559
		560	eio_grp_cancel (req);
		561	}
		562
		563	static void etp_submit (ETP_REQ *req)
		564	{
		565	req->pri -= ETP_PRI_MIN;
		566
		567	if (expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
		568	if (expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		569
		570	if (expect_false (req->type == EIO_GROUP))
		571	{
		572	/* I hope this is worth it :/ */
		573	X_LOCK (reqlock);
		574	++nreqs;
		575	X_UNLOCK (reqlock);
		576
		577	X_LOCK (reslock);
		578
		579	++npending;
		580
		581	if (!reqq_push (&res_queue, req) && want_poll_cb)
		582	want_poll_cb ();
		583
		584	X_UNLOCK (reslock);
		585	}
		586	else
		587	{
		588	X_LOCK (reqlock);
		589	++nreqs;
		590	++nready;
		591	reqq_push (&req_queue, req);
		592	X_COND_SIGNAL (reqwait);
		593	X_UNLOCK (reqlock);
		594
		595	etp_maybe_start_thread ();
		596	}
		597	}
		598
		599	static void etp_set_max_poll_time (double nseconds)
		600	{
		601	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		602	max_poll_time = nseconds;
		603	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		604	}
		605
		606	static void etp_set_max_poll_reqs (unsigned int maxreqs)
		607	{
		608	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		609	max_poll_reqs = maxreqs;
		610	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		611	}
		612
		613	static void etp_set_max_idle (unsigned int nthreads)
		614	{
		615	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		616	max_idle = nthreads <= 0 ? 1 : nthreads;
		617	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		618	}
		619
		620	static void etp_set_min_parallel (unsigned int nthreads)
		621	{
		622	if (wanted < nthreads)
		623	wanted = nthreads;
		624	}
		625
		626	static void etp_set_max_parallel (unsigned int nthreads)
		627	{
		628	if (wanted > nthreads)
		629	wanted = nthreads;
		630
		631	while (started > wanted)
		632	etp_end_thread ();
		633	}
		634
		635	/*****************************************************************************/
		636
		637	static void grp_try_feed (eio_req *grp)
		638	{
		639	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
		640	{
		641	grp->flags &= ~EIO_FLAG_GROUPADD;
		642
		643	EIO_FEED (grp);
		644
		645	/* stop if no progress has been made */
		646	if (!(grp->flags & EIO_FLAG_GROUPADD))
		647	{
		648	grp->feed = 0;
		649	break;
		650	}
		651	}
		652	}
		653
		654	static int grp_dec (eio_req *grp)
		655	{
		656	--grp->size;
		657
		658	/* call feeder, if applicable */
		659	grp_try_feed (grp);
		660
		661	/* finish, if done */
		662	if (!grp->size && grp->int1)
		663	return eio_finish (grp);
		664	else
		665	return 0;
		666	}
		667
		668	void eio_destroy (eio_req *req)
		669	{
		670	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
		671	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
		672
		673	EIO_DESTROY (req);
		674	}
		675
		676	static int eio_finish (eio_req *req)
		677	{
		678	int res = EIO_FINISH (req);
		679
		680	if (req->grp)
		681	{
		682	int res2;
		683	eio_req *grp = req->grp;
		684
		685	/* unlink request */
		686	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		687	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		688
		689	if (grp->grp_first == req)
		690	grp->grp_first = req->grp_next;
		691
		692	res2 = grp_dec (grp);
		693
		694	if (!res && res2)
		695	res = res2;
		696	}
		697
		698	eio_destroy (req);
		699
		700	return res;
		701	}
		702
		703	void eio_grp_cancel (eio_req *grp)
		704	{
		705	for (grp = grp->grp_first; grp; grp = grp->grp_next)
		706	eio_cancel (grp);
		707	}
		708
		709	void eio_cancel (eio_req *req)
		710	{
		711	etp_cancel (req);
		712	}
		713
		714	void eio_submit (eio_req *req)
		715	{
		716	etp_submit (req);
		717	}
		718
		719	unsigned int eio_nreqs (void)
		720	{
		721	return etp_nreqs ();
		722	}
		723
		724	unsigned int eio_nready (void)
		725	{
		726	return etp_nready ();
		727	}
		728
		729	unsigned int eio_npending (void)
		730	{
		731	return etp_npending ();
		732	}
		733
		734	unsigned int eio_nthreads (void)
		735	{
		736	return etp_nthreads ();
		737	}
		738
		739	void eio_set_max_poll_time (double nseconds)
		740	{
		741	etp_set_max_poll_time (nseconds);
		742	}
		743
		744	void eio_set_max_poll_reqs (unsigned int maxreqs)
		745	{
		746	etp_set_max_poll_reqs (maxreqs);
		747	}
		748
		749	void eio_set_max_idle (unsigned int nthreads)
		750	{
		751	etp_set_max_idle (nthreads);
		752	}
		753
		754	void eio_set_min_parallel (unsigned int nthreads)
		755	{
		756	etp_set_min_parallel (nthreads);
		757	}
		758
		759	void eio_set_max_parallel (unsigned int nthreads)
		760	{
		761	etp_set_max_parallel (nthreads);
		762	}
		763
		764	int eio_poll (void)
		765	{
		766	return etp_poll ();
		767	}
		768
484	/*****************************************************************************/	769	/*****************************************************************************/
485	/* work around various missing functions */	770	/* work around various missing functions */
486		771
487	#if !HAVE_PREADWRITE	772	#if !HAVE_PREADWRITE
		773	# undef pread
		774	# undef pwrite
488	# define pread eio__pread	775	# define pread eio__pread
489	# define pwrite eio__pwrite	776	# define pwrite eio__pwrite
490
491	/*
492	* make our pread/pwrite safe against themselves, but not against
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		777
498	static ssize_t	778	static ssize_t
499	eio__pread (int fd, void *buf, size_t count, off_t offset)	779	eio__pread (int fd, void *buf, size_t count, off_t offset)
500	{	780	{
501	ssize_t res;	781	ssize_t res;
…		…
519		799
520	X_LOCK (preadwritelock);	800	X_LOCK (preadwritelock);
521	ooffset = lseek (fd, 0, SEEK_CUR);	801	ooffset = lseek (fd, 0, SEEK_CUR);
522	lseek (fd, offset, SEEK_SET);	802	lseek (fd, offset, SEEK_SET);
523	res = write (fd, buf, count);	803	res = write (fd, buf, count);
524	lseek (fd, offset, SEEK_SET);	804	lseek (fd, ooffset, SEEK_SET);
525	X_UNLOCK (preadwritelock);	805	X_UNLOCK (preadwritelock);
526		806
527	return res;	807	return res;
528	}	808	}
529	#endif	809	#endif
530		810
531	#ifndef HAVE_FUTIMES	811	#ifndef HAVE_FUTIMES
532		812
		813	# undef utimes
		814	# undef futimes
533	# define utimes(path,times) eio__utimes (path, times)	815	# define utimes(path,times) eio__utimes (path, times)
534	# define futimes(fd,times) eio__futimes (fd, times)	816	# define futimes(fd,times) eio__futimes (fd, times)
535		817
536	static int	818	static int
537	eio__utimes (const char *filename, const struct timeval times[2])	819	eio__utimes (const char *filename, const struct timeval times[2])
…		…
556	}	838	}
557		839
558	#endif	840	#endif
559		841
560	#if !HAVE_FDATASYNC	842	#if !HAVE_FDATASYNC
		843	# undef fdatasync
561	# define fdatasync fsync	844	# define fdatasync(fd) fsync (fd)
562	#endif	845	#endif
		846
		847	/* sync_file_range always needs emulation */
		848	int
		849	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
		850	{
		851	#if HAVE_SYNC_FILE_RANGE
		852	int res;
		853
		854	if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
		855	|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
		856	|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
		857	{
		858	flags = 0
		859	| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
		860	| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
		861	| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
		862	}
		863
		864	res = sync_file_range (fd, offset, nbytes, flags);
		865
		866	if (!res || errno != ENOSYS)
		867	return res;
		868	#endif
		869
		870	/* even though we could play tricks with the flags, it's better to always
		871	* call fdatasync, as thta matches the expectation of it's users best */
		872	return fdatasync (fd);
		873	}
563		874
564	#if !HAVE_READAHEAD	875	#if !HAVE_READAHEAD
		876	# undef readahead
565	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)	877	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
566		878
567	static ssize_t	879	static ssize_t
568	eio__readahead (int fd, off_t offset, size_t count, worker *self)	880	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
569	{	881	{
570	size_t todo = count;	882	size_t todo = count;
571	dBUF;	883	dBUF;
572		884
573	while (todo > 0)	885	while (todo > 0)
…		…
583	return count;	895	return count;
584	}	896	}
585		897
586	#endif	898	#endif
587		899
588	#if !HAVE_READDIR_R
589	# define readdir_r eio__readdir_r
590
591	static mutex_t readdirlock = X_MUTEX_INIT;
592
593	static int
594	eio__readdir_r (DIR *dirp, EIO_STRUCT_DIRENT *ent, EIO_STRUCT_DIRENT **res)
595	{
596	EIO_STRUCT_DIRENT *e;
597	int errorno;
598
599	X_LOCK (readdirlock);
600
601	e = readdir (dirp);
602	errorno = errno;
603
604	if (e)
605	{
606	*res = ent;
607	strcpy (ent->d_name, e->d_name);
608	}
609	else
610	*res = 0;
611
612	X_UNLOCK (readdirlock);
613
614	errno = errorno;
615	return e ? 0 : -1;
616	}
617	#endif
618
619	/* sendfile always needs emulation */	900	/* sendfile always needs emulation */
620	static ssize_t	901	static ssize_t
621	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, worker *self)	902	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
622	{	903	{
623	ssize_t res;	904	ssize_t res;
624		905
625	if (!count)	906	if (!count)
626	return 0;	907	return 0;
…		…
708	}	989	}
709		990
710	return res;	991	return res;
711	}	992	}
712		993
		994	static int
		995	eio_dent_cmp (const void *a_, const void *b_)
		996	{
		997	const eio_dirent *a = (const eio_dirent *)a_;
		998	const eio_dirent *b = (const eio_dirent *)b_;
		999
		1000	return (int)b->score - (int)a->score ? (int)b->score - (int)a->score
		1001	: a->inode < b->inode ? -1 : a->inode > b->inode ? 1 : 0; /* int might be < ino_t */
		1002	}
		1003
713	/* read a full directory */	1004	/* read a full directory */
714	static void	1005	static void
715	eio__scandir (eio_req *req, worker *self)	1006	eio__scandir (eio_req *req, etp_worker *self)
716	{	1007	{
717	DIR *dirp;	1008	DIR *dirp;
718	union
719	{
720	EIO_STRUCT_DIRENT d;
721	char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1];
722	} *u;
723	EIO_STRUCT_DIRENT *entp;	1009	EIO_STRUCT_DIRENT *entp;
724	char *name, *names;	1010	unsigned char *name, *names;
725	int memlen = 4096;	1011	int namesalloc = 4096;
726	int memofs = 0;	1012	int namesoffs = 0;
		1013	int flags = req->int1;
		1014	eio_dirent *dents = 0;
		1015	int dentalloc = 128;
727	int res = 0;	1016	int dentoffs = 0;
		1017
		1018	req->result = -1;
		1019
		1020	if (!(flags & EIO_READDIR_DENTS))
		1021	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
728		1022
729	X_LOCK (wrklock);	1023	X_LOCK (wrklock);
		1024	/* the corresponding closedir is in ETP_WORKER_CLEAR */
730	self->dirp = dirp = opendir (req->ptr1);	1025	self->dirp = dirp = opendir (req->ptr1);
731	self->dbuf = u = malloc (sizeof (*u));
732	req->flags |= EIO_FLAG_PTR2_FREE;	1026	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
733	req->ptr2 = names = malloc (memlen);	1027	req->ptr1 = names = malloc (namesalloc);
		1028	req->ptr2 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
734	X_UNLOCK (wrklock);	1029	X_UNLOCK (wrklock);
735		1030
736	if (dirp && u && names)	1031	if (dirp && names && (!flags || dents))
737	for (;;)	1032	for (;;)
738	{	1033	{
739	errno = 0;	1034	errno = 0;
740	readdir_r (dirp, &u->d, &entp);	1035	entp = readdir (dirp);
741		1036
742	if (!entp)	1037	if (!entp)
		1038	{
		1039	if (errno)
		1040	break;
		1041
		1042	/* sort etc. */
		1043	req->int1 = flags;
		1044	req->result = dentoffs;
		1045
		1046	if (dents)
		1047	{
		1048	eio_dirent *ent = dents + dentoffs;
		1049
		1050	while (ent > dents)
		1051	(--ent)->name = names + (size_t)ent->name;
		1052	}
		1053
		1054	if (flags & EIO_READDIR_STAT_ORDER
		1055	|| !(~flags & (EIO_READDIR_DIRS_FIRST | EIO_READDIR_FOUND_UNKNOWN)))
		1056	{
		1057	/* pray your qsort doesn't use quicksort */
		1058	qsort (dents, dentoffs, sizeof (*dents), eio_dent_cmp); /* score depends of DIRS_FIRST */
		1059	}
		1060	else if (flags & EIO_READDIR_DIRS_FIRST)
		1061	{
		1062	/* in this case, all is known, and we just put dirs first and sort them */
		1063	eio_dirent *ent = dents + dentoffs;
		1064	eio_dirent *dir = dents;
		1065
		1066	while (ent > dir)
		1067	{
		1068	if (dir->type == DT_DIR)
		1069	++dir;
		1070	else
		1071	{
		1072	--ent;
		1073
		1074	if (ent->type == DT_DIR)
		1075	{
		1076	eio_dirent tmp = *dir;
		1077	*dir = *ent;
		1078	*ent = tmp;
		1079
		1080	++dir;
		1081	}
		1082	}
		1083	}
		1084
		1085	/* now sort the dirs only */
		1086	qsort (dents, dir - dents, sizeof (*dents), eio_dent_cmp);
		1087	}
		1088
		1089	/* only provide the names array unless DENTS is specified */
		1090	if (!(flags & EIO_READDIR_DENTS))
		1091	{
		1092	X_LOCK (wrklock);
		1093	assert (!dents);
		1094	req->ptr1 = 0;
		1095	req->ptr2 = names;
		1096	X_UNLOCK (wrklock);
		1097	}
		1098
743	break;	1099	break;
		1100	}
744		1101
		1102	/* now add the entry to our list(s) */
745	name = entp->d_name;	1103	name = entp->d_name;
746		1104
		1105	/* skip . and .. entries */
747	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1106	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
748	{	1107	{
749	int len = strlen (name) + 1;	1108	int len = D_NAMLEN (entp) + 1;
750		1109
751	res++;	1110	while (expect_false (namesoffs + len > namesalloc))
752
753	while (memofs + len > memlen)
754	{	1111	{
755	memlen *= 2;	1112	namesalloc *= 2;
756	X_LOCK (wrklock);	1113	X_LOCK (wrklock);
757	req->ptr2 = names = realloc (names, memlen);	1114	req->ptr1 = names = realloc (names, namesalloc);
758	X_UNLOCK (wrklock);	1115	X_UNLOCK (wrklock);
759		1116
760	if (!names)	1117	if (!names)
761	break;	1118	break;
762	}	1119	}
763		1120
764	memcpy (names + memofs, name, len);	1121	memcpy (names + namesoffs, name, len);
		1122
		1123	if (dents)
		1124	{
		1125	struct eio_dirent *ent;
		1126
		1127	if (expect_false (dentoffs == dentalloc))
		1128	{
		1129	dentalloc *= 2;
		1130	X_LOCK (wrklock);
		1131	req->ptr2 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
		1132	X_UNLOCK (wrklock);
		1133
		1134	if (!dents)
		1135	break;
		1136	}
		1137
		1138	ent = dents + dentoffs;
		1139
		1140	ent->name = (char *)(size_t)namesoffs; /* rather dirtily we store the offset in the pointer */
		1141	ent->namelen = len - 1;
		1142	ent->inode = D_INO (entp);
		1143
		1144	switch (D_TYPE (entp))
		1145	{
		1146	default:
		1147	ent->type = EIO_DT_UNKNOWN;
		1148	flags |= EIO_READDIR_FOUND_UNKNOWN;
		1149	break;
		1150
		1151	#ifdef DT_FIFO
		1152	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
		1153	#endif
		1154	#ifdef DT_CHR
		1155	case DT_CHR: ent->type = EIO_DT_CHR; break;
		1156	#endif
		1157	#ifdef DT_MPC
		1158	case DT_MPC: ent->type = EIO_DT_MPC; break;
		1159	#endif
		1160	#ifdef DT_DIR
		1161	case DT_DIR: ent->type = EIO_DT_DIR; break;
		1162	#endif
		1163	#ifdef DT_NAM
		1164	case DT_NAM: ent->type = EIO_DT_NAM; break;
		1165	#endif
		1166	#ifdef DT_BLK
		1167	case DT_BLK: ent->type = EIO_DT_BLK; break;
		1168	#endif
		1169	#ifdef DT_MPB
		1170	case DT_MPB: ent->type = EIO_DT_MPB; break;
		1171	#endif
		1172	#ifdef DT_REG
		1173	case DT_REG: ent->type = EIO_DT_REG; break;
		1174	#endif
		1175	#ifdef DT_NWK
		1176	case DT_NWK: ent->type = EIO_DT_NWK; break;
		1177	#endif
		1178	#ifdef DT_CMP
		1179	case DT_CMP: ent->type = EIO_DT_CMP; break;
		1180	#endif
		1181	#ifdef DT_LNK
		1182	case DT_LNK: ent->type = EIO_DT_LNK; break;
		1183	#endif
		1184	#ifdef DT_SOCK
		1185	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
		1186	#endif
		1187	#ifdef DT_DOOR
		1188	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
		1189	#endif
		1190	#ifdef DT_WHT
		1191	case DT_WHT: ent->type = EIO_DT_WHT; break;
		1192	#endif
		1193	}
		1194
		1195	ent->score = 0;
		1196
		1197	if (flags & EIO_READDIR_DIRS_FIRST)
		1198	{
		1199	if (ent->type == EIO_DT_UNKNOWN)
		1200	{
		1201	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
		1202	ent->score = 98;
		1203	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
		1204	ent->score = len <= 2 ? len + 60 : len <= 4 ? 50 : len <= 7 ? 40 : 10; /* shorter == more likely dir, but avoid too many classes */
		1205	}
		1206	else if (ent->type == EIO_DT_DIR)
		1207	ent->score = 100;
		1208	}
		1209	}
		1210
765	memofs += len;	1211	namesoffs += len;
		1212	++dentoffs;
766	}	1213	}
767	}	1214	}
768		1215	else
769	if (errno)
770	res = -1;
771
772	req->result = res;	1216	req->result = -1;
		1217	}
		1218
		1219	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1220	# undef msync
		1221	# define msync(a,b,c) ((errno = ENOSYS), -1)
		1222	#endif
		1223
		1224	int
		1225	eio__mtouch (void *mem, size_t len, int flags)
		1226	{
		1227	intptr_t addr = (intptr_t)mem;
		1228	intptr_t end = addr + len;
		1229	#ifdef PAGESIZE
		1230	const intptr_t page = PAGESIZE;
		1231	#else
		1232	static intptr_t page;
		1233
		1234	if (!page)
		1235	page = sysconf (_SC_PAGESIZE);
		1236	#endif
		1237
		1238	addr &= ~(page - 1); /* assume page size is always a power of two */
		1239
		1240	if (addr < end)
		1241	if (flags) /* modify */
		1242	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len);
		1243	else
		1244	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len);
		1245
		1246	return 0;
773	}	1247	}
774		1248
775	/*****************************************************************************/	1249	/*****************************************************************************/
776		1250
777	#define ALLOC(len) \	1251	#define ALLOC(len) \
…		…
787	req->result = -1; \	1261	req->result = -1; \
788	break; \	1262	break; \
789	} \	1263	} \
790	}	1264	}
791		1265
792	X_THREAD_PROC (eio_proc)	1266	X_THREAD_PROC (etp_proc)
793	{	1267	{
794	eio_req *req;	1268	ETP_REQ *req;
795	struct timespec ts;	1269	struct timespec ts;
796	worker *self = (worker *)thr_arg;	1270	etp_worker *self = (etp_worker *)thr_arg;
797		1271
798	/* try to distribute timeouts somewhat randomly */	1272	/* try to distribute timeouts somewhat randomly */
799	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1273	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
800		1274
801	for (;;)	1275	for (;;)
802	{	1276	{
803	ts.tv_sec = time (0) + IDLE_TIMEOUT;
804
805	X_LOCK (reqlock);	1277	X_LOCK (reqlock);
806		1278
807	for (;;)	1279	for (;;)
808	{	1280	{
809	self->req = req = reqq_shift (&req_queue);	1281	self->req = req = reqq_shift (&req_queue);
…		…
811	if (req)	1283	if (req)
812	break;	1284	break;
813		1285
814	++idle;	1286	++idle;
815		1287
		1288	ts.tv_sec = time (0) + IDLE_TIMEOUT;
816	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1289	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
817	{	1290	{
818	if (idle > max_idle)	1291	if (idle > max_idle)
819	{	1292	{
820	--idle;	1293	--idle;
…		…
825	goto quit;	1298	goto quit;
826	}	1299	}
827		1300
828	/* we are allowed to idle, so do so without any timeout */	1301	/* we are allowed to idle, so do so without any timeout */
829	X_COND_WAIT (reqwait, reqlock);	1302	X_COND_WAIT (reqwait, reqlock);
830	ts.tv_sec = time (0) + IDLE_TIMEOUT;
831	}	1303	}
832		1304
833	--idle;	1305	--idle;
834	}	1306	}
835		1307
836	--nready;	1308	--nready;
837		1309
838	X_UNLOCK (reqlock);	1310	X_UNLOCK (reqlock);
839		1311
840	errno = 0; /* strictly unnecessary */	1312	if (req->type < 0)
		1313	goto quit;
841		1314
842	if (!EIO_CANCELLED (req))	1315	if (!EIO_CANCELLED (req))
843	switch (req->type)	1316	ETP_EXECUTE (self, req);
844	{
845	case EIO_READ: ALLOC (req->size);
846	req->result = req->offs >= 0
847	? pread (req->int1, req->ptr2, req->size, req->offs)
848	: read (req->int1, req->ptr2, req->size); break;
849	case EIO_WRITE: req->result = req->offs >= 0
850	? pwrite (req->int1, req->ptr2, req->size, req->offs)
851	: write (req->int1, req->ptr2, req->size); break;
852
853	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
854	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
855
856	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
857	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
858	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
859	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
860	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
861	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
862
863	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
864	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
865	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
866	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
867	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
868	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
869
870	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
871	case EIO_CLOSE: req->result = close (req->int1); break;
872	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
873	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
874	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
875	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
876	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
877	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
878	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
879	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
880
881	case EIO_READLINK: ALLOC (NAME_MAX);
882	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
883
884	case EIO_SYNC: req->result = 0; sync (); break;
885	case EIO_FSYNC: req->result = fsync (req->int1); break;
886	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
887
888	case EIO_READDIR: eio__scandir (req, self); break;
889
890	case EIO_BUSY:
891	#ifdef _WIN32
892	Sleep (req->nv1 * 1000.);
893	#else
894	{
895	struct timeval tv;
896
897	tv.tv_sec = req->nv1;
898	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
899
900	req->result = select (0, 0, 0, 0, &tv);
901	}
902	#endif
903	break;
904
905	case EIO_UTIME:
906	case EIO_FUTIME:
907	{
908	struct timeval tv[2];
909	struct timeval *times;
910
911	if (req->nv1 != -1. || req->nv2 != -1.)
912	{
913	tv[0].tv_sec = req->nv1;
914	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
915	tv[1].tv_sec = req->nv2;
916	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
917
918	times = tv;
919	}
920	else
921	times = 0;
922
923
924	req->result = req->type == EIO_FUTIME
925	? futimes (req->int1, times)
926	: utimes (req->ptr1, times);
927	}
928
929	case EIO_GROUP:
930	case EIO_NOP:
931	req->result = 0;
932	break;
933
934	case EIO_QUIT:
935	goto quit;
936
937	default:
938	req->result = -1;
939	break;
940	}
941
942	req->errorno = errno;
943		1317
944	X_LOCK (reslock);	1318	X_LOCK (reslock);
945		1319
946	++npending;	1320	++npending;
947		1321
948	if (!reqq_push (&res_queue, req) && want_poll_cb)	1322	if (!reqq_push (&res_queue, req) && want_poll_cb)
949	want_poll_cb ();	1323	want_poll_cb ();
950		1324
951	self->req = 0;	1325	self->req = 0;
952	worker_clear (self);	1326	etp_worker_clear (self);
953		1327
954	X_UNLOCK (reslock);	1328	X_UNLOCK (reslock);
955	}	1329	}
956		1330
957	quit:	1331	quit:
958	X_LOCK (wrklock);	1332	X_LOCK (wrklock);
959	worker_free (self);	1333	etp_worker_free (self);
960	X_UNLOCK (wrklock);	1334	X_UNLOCK (wrklock);
961		1335
962	return 0;	1336	return 0;
963	}	1337	}
964		1338
965	/*****************************************************************************/	1339	/*****************************************************************************/
966		1340
967	static void eio_atfork_prepare (void)
968	{
969	X_LOCK (wrklock);
970	X_LOCK (reqlock);
971	X_LOCK (reslock);
972	#if !HAVE_PREADWRITE
973	X_LOCK (preadwritelock);
974	#endif
975	#if !HAVE_READDIR_R
976	X_LOCK (readdirlock);
977	#endif
978	}
979
980	static void eio_atfork_parent (void)
981	{
982	#if !HAVE_READDIR_R
983	X_UNLOCK (readdirlock);
984	#endif
985	#if !HAVE_PREADWRITE
986	X_UNLOCK (preadwritelock);
987	#endif
988	X_UNLOCK (reslock);
989	X_UNLOCK (reqlock);
990	X_UNLOCK (wrklock);
991	}
992
993	static void eio_atfork_child (void)
994	{
995	eio_req *prv;
996
997	while (prv = reqq_shift (&req_queue))
998	eio_destroy (prv);
999
1000	while (prv = reqq_shift (&res_queue))
1001	eio_destroy (prv);
1002
1003	while (wrk_first.next != &wrk_first)
1004	{
1005	worker *wrk = wrk_first.next;
1006
1007	if (wrk->req)
1008	eio_destroy (wrk->req);
1009
1010	worker_clear (wrk);
1011	worker_free (wrk);
1012	}
1013
1014	started = 0;
1015	idle = 0;
1016	nreqs = 0;
1017	nready = 0;
1018	npending = 0;
1019
1020	eio_atfork_parent ();
1021	}
1022
1023	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1341	int eio_init (void (*want_poll)(void), void (*done_poll)(void))
1024	{	1342	{
1025	want_poll_cb = want_poll;	1343	return etp_init (want_poll, done_poll);
1026	done_poll_cb = done_poll;
1027
1028	#ifdef _WIN32
1029	X_MUTEX_CHECK (wrklock);
1030	X_MUTEX_CHECK (reslock);
1031	X_MUTEX_CHECK (reqlock);
1032	X_MUTEX_CHECK (reqwait);
1033	X_MUTEX_CHECK (preadwritelock);
1034	X_MUTEX_CHECK (readdirlock);
1035
1036	X_COND_CHECK (reqwait);
1037	#endif
1038
1039	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);
1040	}	1344	}
1041		1345
1042	static void eio_api_destroy (eio_req *req)	1346	static void eio_api_destroy (eio_req *req)
1043	{	1347	{
1044	free (req);	1348	free (req);
…		…
1049	\	1353	\
1050	req = (eio_req *)calloc (1, sizeof *req); \	1354	req = (eio_req *)calloc (1, sizeof *req); \
1051	if (!req) \	1355	if (!req) \
1052	return 0; \	1356	return 0; \
1053	\	1357	\
1054	req->type = rtype; \	1358	req->type = rtype; \
1055	req->pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \	1359	req->pri = pri; \
1056	req->finish = cb; \	1360	req->finish = cb; \
		1361	req->data = data; \
1057	req->destroy = eio_api_destroy;	1362	req->destroy = eio_api_destroy;
1058		1363
1059	#define SEND eio_submit (req); return req	1364	#define SEND eio_submit (req); return req
1060		1365
1061	#define PATH \	1366	#define PATH \
…		…
1065	{ \	1370	{ \
1066	eio_api_destroy (req); \	1371	eio_api_destroy (req); \
1067	return 0; \	1372	return 0; \
1068	}	1373	}
1069		1374
		1375	static void eio_execute (etp_worker *self, eio_req *req)
		1376	{
		1377	errno = 0;
		1378
		1379	switch (req->type)
		1380	{
		1381	case EIO_READ: ALLOC (req->size);
		1382	req->result = req->offs >= 0
		1383	? pread (req->int1, req->ptr2, req->size, req->offs)
		1384	: read (req->int1, req->ptr2, req->size); break;
		1385	case EIO_WRITE: req->result = req->offs >= 0
		1386	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		1387	: write (req->int1, req->ptr2, req->size); break;
		1388
		1389	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1390	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
		1391
		1392	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1393	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1394	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1395	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1396	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1397	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1398
		1399	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1400	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1401	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
		1402	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
		1403	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1404	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		1405
		1406	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
		1407	case EIO_CLOSE: req->result = close (req->int1); break;
		1408	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		1409	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		1410	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		1411	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		1412	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		1413	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		1414	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		1415	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->int3); break;
		1416
		1417	case EIO_READLINK: ALLOC (NAME_MAX);
		1418	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
		1419
		1420	case EIO_SYNC: req->result = 0; sync (); break;
		1421	case EIO_FSYNC: req->result = fsync (req->int1); break;
		1422	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		1423	case EIO_MSYNC: req->result = msync (req->ptr2, req->size, req->int1); break;
		1424	case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break;
		1425	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		1426
		1427	case EIO_READDIR: eio__scandir (req, self); break;
		1428
		1429	case EIO_BUSY:
		1430	#ifdef _WIN32
		1431	Sleep (req->nv1 * 1000.);
		1432	#else
		1433	{
		1434	struct timeval tv;
		1435
		1436	tv.tv_sec = req->nv1;
		1437	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
		1438
		1439	req->result = select (0, 0, 0, 0, &tv);
		1440	}
		1441	#endif
		1442	break;
		1443
		1444	case EIO_UTIME:
		1445	case EIO_FUTIME:
		1446	{
		1447	struct timeval tv[2];
		1448	struct timeval *times;
		1449
		1450	if (req->nv1 != -1. || req->nv2 != -1.)
		1451	{
		1452	tv[0].tv_sec = req->nv1;
		1453	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1454	tv[1].tv_sec = req->nv2;
		1455	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1456
		1457	times = tv;
		1458	}
		1459	else
		1460	times = 0;
		1461
		1462
		1463	req->result = req->type == EIO_FUTIME
		1464	? futimes (req->int1, times)
		1465	: utimes (req->ptr1, times);
		1466	}
		1467	break;
		1468
		1469	case EIO_GROUP:
		1470	abort (); /* handled in eio_request */
		1471
		1472	case EIO_NOP:
		1473	req->result = 0;
		1474	break;
		1475
		1476	case EIO_CUSTOM:
		1477	((void (*)(eio_req *))req->feed) (req);
		1478	break;
		1479
		1480	default:
		1481	req->result = -1;
		1482	break;
		1483	}
		1484
		1485	req->errorno = errno;
		1486	}
		1487
		1488	#ifndef EIO_NO_WRAPPERS
		1489
1070	eio_req *eio_nop (int pri, eio_cb cb, void *data)	1490	eio_req *eio_nop (int pri, eio_cb cb, void *data)
1071	{	1491	{
1072	REQ (EIO_NOP); SEND;	1492	REQ (EIO_NOP); SEND;
1073	}	1493	}
1074		1494
…		…
1083	}	1503	}
1084		1504
1085	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)	1505	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
1086	{	1506	{
1087	REQ (EIO_FSYNC); req->int1 = fd; SEND;	1507	REQ (EIO_FSYNC); req->int1 = fd; SEND;
		1508	}
		1509
		1510	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1511	{
		1512	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1513	}
		1514
		1515	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1516	{
		1517	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1518	}
		1519
		1520	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		1521	{
		1522	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
1088	}	1523	}
1089		1524
1090	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)	1525	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1091	{	1526	{
1092	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;	1527	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
…		…
1206	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)	1641	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
1207	{	1642	{
1208	return eio__1path (EIO_RMDIR, path, pri, cb, data);	1643	return eio__1path (EIO_RMDIR, path, pri, cb, data);
1209	}	1644	}
1210		1645
1211	eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data)	1646	eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data)
1212	{	1647	{
1213	return eio__1path (EIO_READDIR, path, pri, cb, data);	1648	REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
1214	}	1649	}
1215		1650
1216	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)	1651	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1217	{	1652	{
1218	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND;	1653	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND;
1219	}	1654	}
1220		1655
1221	static eio_req *	1656	static eio_req *
1222	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)	1657	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1223	{	1658	{
…		…
1247	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)	1682	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1248	{	1683	{
1249	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);	1684	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
1250	}	1685	}
1251		1686
		1687	eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data)
		1688	{
		1689	REQ (EIO_CUSTOM); req->feed = (void (*)(eio_req *))execute; SEND;
		1690	}
		1691
		1692	#endif
		1693
1252	eio_req *eio_grp (eio_cb cb, void *data)	1694	eio_req *eio_grp (eio_cb cb, void *data)
1253	{	1695	{
1254	const int pri = EIO_PRI_MAX;	1696	const int pri = EIO_PRI_MAX;
1255		1697
1256	REQ (EIO_GROUP); SEND;	1698	REQ (EIO_GROUP); SEND;
…		…
1280		1722
1281	void eio_grp_add (eio_req *grp, eio_req *req)	1723	void eio_grp_add (eio_req *grp, eio_req *req)
1282	{	1724	{
1283	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	1725	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
1284		1726
		1727	grp->flags |= EIO_FLAG_GROUPADD;
		1728
1285	++grp->size;	1729	++grp->size;
1286	req->grp = grp;	1730	req->grp = grp;
1287		1731
1288	req->grp_prev = 0;	1732	req->grp_prev = 0;
1289	req->grp_next = grp->grp_first;	1733	req->grp_next = grp->grp_first;
…		…
1297	/*****************************************************************************/	1741	/*****************************************************************************/
1298	/* misc garbage */	1742	/* misc garbage */
1299		1743
1300	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)	1744	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
1301	{	1745	{
1302	worker wrk;	1746	etp_worker wrk;
1303		1747
1304	wrk.dbuf = 0;	1748	wrk.dbuf = 0;
1305		1749
1306	eio__sendfile (ofd, ifd, offset, count, &wrk);	1750	eio__sendfile (ofd, ifd, offset, count, &wrk);
1307		1751

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