[ViewVC] Diff of: cvs/libeio/eio.c

Comparing libeio/eio.c (file contents):
Revision 1.9 by root, Mon May 12 00:31:43 2008 UTC vs.
Revision 1.69 by root, Fri Jun 10 06:50:42 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
		46	#ifdef EIO_STACKSIZE
		47	# define XTHREAD_STACKSIZE EIO_STACKSIZE
		48	#endif
2	#include "xthread.h"	49	#include "xthread.h"
3		50
4	#include <errno.h>	51	#include <errno.h>
5	#include <stddef.h>	52	#include <stddef.h>
6	#include <stdlib.h>	53	#include <stdlib.h>
7	#include <string.h>	54	#include <string.h>
8	#include <errno.h>	55	#include <errno.h>
9	#include <sys/types.h>	56	#include <sys/types.h>
10	#include <sys/stat.h>	57	#include <sys/stat.h>
		58	#include <sys/statvfs.h>
11	#include <limits.h>	59	#include <limits.h>
12	#include <fcntl.h>	60	#include <fcntl.h>
13	#include <assert.h>	61	#include <assert.h>
14		62
		63	/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */
		64	/* intptr_t only comes form stdint.h, says idiot openbsd coder */
		65	#if HAVE_STDINT_H
		66	# include <stdint.h>
		67	#endif
		68
15	#ifndef EIO_FINISH	69	#ifndef EIO_FINISH
16	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	70	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
17	#endif	71	#endif
18		72
19	#ifndef EIO_DESTROY	73	#ifndef EIO_DESTROY
25	#endif	79	#endif
26		80
27	#ifdef _WIN32	81	#ifdef _WIN32
28		82
29	/doh/	83	/doh/
30
31	#else	84	#else
32		85
33	# include "config.h"
34	# include <sys/time.h>	86	# include <sys/time.h>
35	# include <sys/select.h>	87	# include <sys/select.h>
36	# include <unistd.h>	88	# include <unistd.h>
37	# include <utime.h>	89	# include <utime.h>
38	# include <signal.h>	90	# include <signal.h>
39	# include <dirent.h>	91	# include <dirent.h>
40		92
		93	#if _POSIX_MEMLOCK \|\| _POSIX_MEMLOCK_RANGE \|\| _POSIX_MAPPED_FILES
		94	# include <sys/mman.h>
		95	#endif
		96
		97	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
		98	# if __FreeBSD__ \|\| defined __NetBSD__ \|\| defined __OpenBSD__
		99	# define _DIRENT_HAVE_D_TYPE /* sigh */
		100	# define D_INO(de) (de)->d_fileno
		101	# define D_NAMLEN(de) (de)->d_namlen
		102	# elif __linux \|\| defined d_ino \|\| _XOPEN_SOURCE >= 600
		103	# define D_INO(de) (de)->d_ino
		104	# endif
		105
		106	#ifdef _D_EXACT_NAMLEN
		107	# undef D_NAMLEN
		108	# define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
		109	#endif
		110
		111	# ifdef _DIRENT_HAVE_D_TYPE
		112	# define D_TYPE(de) (de)->d_type
		113	# endif
		114
41	# ifndef EIO_STRUCT_DIRENT	115	# ifndef EIO_STRUCT_DIRENT
42	# define EIO_STRUCT_DIRENT struct dirent	116	# define EIO_STRUCT_DIRENT struct dirent
43	# endif	117	# endif
44		118
45	#endif	119	#endif
46		120
47	#if HAVE_SENDFILE	121	#if HAVE_SENDFILE
48	# if __linux	122	# if __linux
49	# include <sys/sendfile.h>	123	# include <sys/sendfile.h>
50	# elif __freebsd	124	# elif __FreeBSD__ \|\| defined __APPLE__
51	# include <sys/socket.h>	125	# include <sys/socket.h>
52	# include <sys/uio.h>	126	# include <sys/uio.h>
53	# elif __hpux	127	# elif __hpux
54	# include <sys/socket.h>	128	# include <sys/socket.h>
55	# elif __solaris /* not yet */	129	# elif __solaris
56	# include <sys/sendfile.h>	130	# include <sys/sendfile.h>
57	# else	131	# else
58	# error sendfile support requested but not available	132	# error sendfile support requested but not available
59	# endif	133	# endif
60	#endif	134	#endif
61		135
62	/* number of seconds after which an idle threads exit */	136	#ifndef D_TYPE
63	#define IDLE_TIMEOUT 10	137	# define D_TYPE(de) 0
		138	#endif
		139	#ifndef D_INO
		140	# define D_INO(de) 0
		141	#endif
		142	#ifndef D_NAMLEN
		143	# define D_NAMLEN(de) strlen ((de)->d_name)
		144	#endif
64		145
65	/* used for struct dirent, AIX doesn't provide it */	146	/* used for struct dirent, AIX doesn't provide it */
66	#ifndef NAME_MAX	147	#ifndef NAME_MAX
67	# define NAME_MAX 4096	148	# define NAME_MAX 4096
68	#endif	149	#endif
69		150
		151	/* used for readlink etc. */
		152	#ifndef PATH_MAX
		153	# define PATH_MAX 4096
		154	#endif
		155
70	/* buffer size for various temporary buffers */	156	/* buffer size for various temporary buffers */
71	#define EIO_BUFSIZE 65536	157	#define EIO_BUFSIZE 65536
72		158
73	#define dBUF \	159	#define dBUF \
74	char *eio_buf; \	160	char *eio_buf; \
75	X_LOCK (wrklock); \	161	ETP_WORKER_LOCK (self); \
76	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	162	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \
77	X_UNLOCK (wrklock); \	163	ETP_WORKER_UNLOCK (self); \
78	errno = ENOMEM; \	164	errno = ENOMEM; \
79	if (!eio_buf) \	165	if (!eio_buf) \
80	return -1;	166	return -1;
81		167
82	#define EIO_TICKS ((1000000 + 1023) >> 10)	168	#define EIO_TICKS ((1000000 + 1023) >> 10)
83		169
		170	/*****************************************************************************/
		171
		172	#if __GNUC__ >= 3
		173	# define expect(expr,value) __builtin_expect ((expr),(value))
		174	#else
		175	# define expect(expr,value) (expr)
		176	#endif
		177
		178	#define expect_false(expr) expect ((expr) != 0, 0)
		179	#define expect_true(expr) expect ((expr) != 0, 1)
		180
		181	/*****************************************************************************/
		182
		183	#define ETP_PRI_MIN EIO_PRI_MIN
		184	#define ETP_PRI_MAX EIO_PRI_MAX
		185
		186	struct etp_worker;
		187
		188	#define ETP_REQ eio_req
		189	#define ETP_DESTROY(req) eio_destroy (req)
		190	static int eio_finish (eio_req *req);
		191	#define ETP_FINISH(req) eio_finish (req)
		192	static void eio_execute (struct etp_worker self, eio_req req);
		193	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		194
		195	#define ETP_WORKER_CLEAR(req) \
		196	if (wrk->dbuf) \
		197	{ \
		198	free (wrk->dbuf); \
		199	wrk->dbuf = 0; \
		200	} \
		201	\
		202	if (wrk->dirp) \
		203	{ \
		204	closedir (wrk->dirp); \
		205	wrk->dirp = 0; \
		206	}
		207
		208	#define ETP_WORKER_COMMON \
		209	void *dbuf; \
		210	DIR *dirp;
		211
		212	/*****************************************************************************/
		213
		214	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		215
		216	/* calculate time difference in ~1/EIO_TICKS of a second */
		217	static int tvdiff (struct timeval tv1, struct timeval tv2)
		218	{
		219	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		220	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		221	}
		222
		223	static unsigned int started, idle, wanted = 4;
		224
84	static void (*want_poll_cb) (void);	225	static void (*want_poll_cb) (void);
85	static void (*done_poll_cb) (void);	226	static void (*done_poll_cb) (void);
86		227
87	static unsigned int max_poll_time = 0;	228	static unsigned int max_poll_time; /* reslock */
88	static unsigned int max_poll_reqs = 0;	229	static unsigned int max_poll_reqs; /* reslock */
89		230
90	/* calculcate time difference in ~1/EIO_TICKS of a second */	231	static volatile unsigned int nreqs; /* reqlock */
91	static int tvdiff (struct timeval tv1, struct timeval tv2)	232	static volatile unsigned int nready; /* reqlock */
92	{	233	static volatile unsigned int npending; /* reqlock */
93	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	234	static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
94	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);	235	static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
95	}
96		236
97	static unsigned int started, idle, wanted = 4;	237	static xmutex_t wrklock;
		238	static xmutex_t reslock;
		239	static xmutex_t reqlock;
		240	static xcond_t reqwait;
		241
		242	#if !HAVE_PREADWRITE
		243	/*
		244	* make our pread/pwrite emulation safe against themselves, but not against
		245	* normal read/write by using a mutex. slows down execution a lot,
		246	* but that's your problem, not mine.
		247	*/
		248	static xmutex_t preadwritelock = X_MUTEX_INIT;
		249	#endif
		250
		251	typedef struct etp_worker
		252	{
		253	/* locked by wrklock */
		254	struct etp_worker prev, next;
		255
		256	xthread_t tid;
		257
		258	/* locked by reslock, reqlock or wrklock */
		259	ETP_REQ req; / currently processed request */
		260
		261	ETP_WORKER_COMMON
		262	} etp_worker;
		263
		264	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
		265
		266	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		267	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
98		268
99	/* worker threads management */	269	/* worker threads management */
100	static mutex_t wrklock = X_MUTEX_INIT;
101		270
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)	271	static void etp_worker_clear (etp_worker *wrk)
118	{	272	{
119	if (wrk->dirp)	273	ETP_WORKER_CLEAR (wrk);
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	}	274	}
131		275
132	static void worker_free (worker *wrk)	276	static void etp_worker_free (etp_worker *wrk)
133	{	277	{
134	wrk->next->prev = wrk->prev;	278	wrk->next->prev = wrk->prev;
135	wrk->prev->next = wrk->next;	279	wrk->prev->next = wrk->next;
136		280
137	free (wrk);	281	free (wrk);
138	}	282	}
139		283
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;
144	static mutex_t reqlock = X_MUTEX_INIT;
145	static cond_t reqwait = X_COND_INIT;
146
147	unsigned int eio_nreqs (void)	284	static unsigned int etp_nreqs (void)
148	{	285	{
		286	int retval;
		287	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		288	retval = nreqs;
		289	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
149	return nreqs;	290	return retval;
150	}	291	}
151		292
152	unsigned int eio_nready (void)	293	static unsigned int etp_nready (void)
153	{	294	{
154	unsigned int retval;	295	unsigned int retval;
155		296
156	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	297	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
157	retval = nready;	298	retval = nready;
158	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	299	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
159		300
160	return retval;	301	return retval;
161	}	302	}
162		303
163	unsigned int eio_npending (void)	304	static unsigned int etp_npending (void)
164	{	305	{
165	unsigned int retval;	306	unsigned int retval;
166		307
167	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	308	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
168	retval = npending;	309	retval = npending;
169	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	310	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
170		311
171	return retval;	312	return retval;
172	}	313	}
173		314
174	unsigned int eio_nthreads (void)	315	static unsigned int etp_nthreads (void)
175	{	316	{
176	unsigned int retval;	317	unsigned int retval;
177		318
178	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	319	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
179	retval = started;	320	retval = started;
…		…
186	* a somewhat faster data structure might be nice, but	327	* a somewhat faster data structure might be nice, but
187	* with 8 priorities this actually needs <20 insns	328	* with 8 priorities this actually needs <20 insns
188	* per shift, the most expensive operation.	329	* per shift, the most expensive operation.
189	*/	330	*/
190	typedef struct {	331	typedef struct {
191	eio_req qs[EIO_NUM_PRI], qe[EIO_NUM_PRI]; /* qstart, qend */	332	ETP_REQ qs[ETP_NUM_PRI], qe[ETP_NUM_PRI]; /* qstart, qend */
192	int size;	333	int size;
193	} reqq;	334	} etp_reqq;
194		335
195	static reqq req_queue;	336	static etp_reqq req_queue;
196	static reqq res_queue;	337	static etp_reqq res_queue;
197		338
198	static int reqq_push (reqq q, eio_req req)	339	static int reqq_push (etp_reqq q, ETP_REQ req)
199	{	340	{
200	int pri = req->pri;	341	int pri = req->pri;
201	req->next = 0;	342	req->next = 0;
202		343
203	if (q->qe[pri])	344	if (q->qe[pri])
…		…
209	q->qe[pri] = q->qs[pri] = req;	350	q->qe[pri] = q->qs[pri] = req;
210		351
211	return q->size++;	352	return q->size++;
212	}	353	}
213		354
214	static eio_req reqq_shift (reqq q)	355	static ETP_REQ reqq_shift (etp_reqq q)
215	{	356	{
216	int pri;	357	int pri;
217		358
218	if (!q->size)	359	if (!q->size)
219	return 0;	360	return 0;
220		361
221	--q->size;	362	--q->size;
222		363
223	for (pri = EIO_NUM_PRI; pri--; )	364	for (pri = ETP_NUM_PRI; pri--; )
224	{	365	{
225	eio_req *req = q->qs[pri];	366	eio_req *req = q->qs[pri];
226		367
227	if (req)	368	if (req)
228	{	369	{
…		…
234	}	375	}
235		376
236	abort ();	377	abort ();
237	}	378	}
238		379
239	static void grp_try_feed (eio_req *grp)	380	static void etp_thread_init (void)
240	{	381	{
241	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	382	X_MUTEX_CREATE (wrklock);
		383	X_MUTEX_CREATE (reslock);
		384	X_MUTEX_CREATE (reqlock);
		385	X_COND_CREATE (reqwait);
		386	}
		387
		388	static void etp_atfork_prepare (void)
		389	{
		390	X_LOCK (wrklock);
		391	X_LOCK (reqlock);
		392	X_LOCK (reslock);
		393	#if !HAVE_PREADWRITE
		394	X_LOCK (preadwritelock);
		395	#endif
		396	}
		397
		398	static void etp_atfork_parent (void)
		399	{
		400	#if !HAVE_PREADWRITE
		401	X_UNLOCK (preadwritelock);
		402	#endif
		403	X_UNLOCK (reslock);
		404	X_UNLOCK (reqlock);
		405	X_UNLOCK (wrklock);
		406	}
		407
		408	static void etp_atfork_child (void)
		409	{
		410	ETP_REQ *prv;
		411
		412	while ((prv = reqq_shift (&req_queue)))
		413	ETP_DESTROY (prv);
		414
		415	while ((prv = reqq_shift (&res_queue)))
		416	ETP_DESTROY (prv);
		417
		418	while (wrk_first.next != &wrk_first)
242	{	419	{
243	int old_len = grp->size;	420	etp_worker *wrk = wrk_first.next;
244		421
245	EIO_FEED (grp);	422	if (wrk->req)
		423	ETP_DESTROY (wrk->req);
246		424
247	/* stop if no progress has been made */	425	etp_worker_clear (wrk);
248	if (old_len == grp->size)	426	etp_worker_free (wrk);
249	{
250	grp->feed = 0;
251	break;
252	}
253	}	427	}
254	}
255		428
256	static int eio_finish (eio_req *req);	429	started = 0;
		430	idle = 0;
		431	nreqs = 0;
		432	nready = 0;
		433	npending = 0;
257		434
258	static int grp_dec (eio_req *grp)	435	etp_thread_init ();
259	{	436	}
260	--grp->size;
261		437
262	/* call feeder, if applicable */	438	static void
263	grp_try_feed (grp);	439	etp_once_init (void)
		440	{
		441	etp_thread_init ();
		442	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
		443	}
264		444
265	/* finish, if done */	445	static int
266	if (!grp->size && grp->int1)	446	etp_init (void (want_poll)(void), void (done_poll)(void))
267	return eio_finish (grp);	447	{
268	else	448	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
		449
		450	pthread_once (&doinit, etp_once_init);
		451
		452	want_poll_cb = want_poll;
		453	done_poll_cb = done_poll;
		454
269	return 0;	455	return 0;
270	}	456	}
271		457
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);	458	X_THREAD_PROC (etp_proc);
323		459
324	static void start_thread (void)	460	static void etp_start_thread (void)
325	{	461	{
326	worker *wrk = calloc (1, sizeof (worker));	462	etp_worker *wrk = calloc (1, sizeof (etp_worker));
327		463
328	/TODO/	464	/TODO/
329	assert (("unable to allocate worker thread data", wrk));	465	assert (("unable to allocate worker thread data", wrk));
330		466
331	X_LOCK (wrklock);	467	X_LOCK (wrklock);
332		468
333	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	469	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
334	{	470	{
335	wrk->prev = &wrk_first;	471	wrk->prev = &wrk_first;
336	wrk->next = wrk_first.next;	472	wrk->next = wrk_first.next;
337	wrk_first.next->prev = wrk;	473	wrk_first.next->prev = wrk;
338	wrk_first.next = wrk;	474	wrk_first.next = wrk;
…		…
342	free (wrk);	478	free (wrk);
343		479
344	X_UNLOCK (wrklock);	480	X_UNLOCK (wrklock);
345	}	481	}
346		482
347	static void maybe_start_thread (void)	483	static void etp_maybe_start_thread (void)
348	{	484	{
349	if (eio_nthreads () >= wanted)	485	if (expect_true (etp_nthreads () >= wanted))
350	return;	486	return;
351		487
352	/* todo: maybe use idle here, but might be less exact */	488	/* todo: maybe use idle here, but might be less exact */
353	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	489	if (expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
354	return;	490	return;
355		491
356	start_thread ();	492	etp_start_thread ();
357	}	493	}
358		494
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)	495	static void etp_end_thread (void)
373	{	496	{
374	eio_req *req = calloc (1, sizeof (eio_req));	497	eio_req *req = calloc (1, sizeof (eio_req));
375		498
376	req->type = EIO_QUIT;	499	req->type = -1;
377	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	500	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
378		501
379	X_LOCK (reqlock);	502	X_LOCK (reqlock);
380	reqq_push (&req_queue, req);	503	reqq_push (&req_queue, req);
381	X_COND_SIGNAL (reqwait);	504	X_COND_SIGNAL (reqwait);
382	X_UNLOCK (reqlock);	505	X_UNLOCK (reqlock);
…		…
384	X_LOCK (wrklock);	507	X_LOCK (wrklock);
385	--started;	508	--started;
386	X_UNLOCK (wrklock);	509	X_UNLOCK (wrklock);
387	}	510	}
388		511
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)	512	static int etp_poll (void)
426	{	513	{
427	int maxreqs = max_poll_reqs;	514	unsigned int maxreqs;
		515	unsigned int maxtime;
428	struct timeval tv_start, tv_now;	516	struct timeval tv_start, tv_now;
429	eio_req *req;
430		517
		518	X_LOCK (reslock);
		519	maxreqs = max_poll_reqs;
		520	maxtime = max_poll_time;
		521	X_UNLOCK (reslock);
		522
431	if (max_poll_time)	523	if (maxtime)
432	gettimeofday (&tv_start, 0);	524	gettimeofday (&tv_start, 0);
433		525
434	for (;;)	526	for (;;)
435	{	527	{
		528	ETP_REQ *req;
		529
436	maybe_start_thread ();	530	etp_maybe_start_thread ();
437		531
438	X_LOCK (reslock);	532	X_LOCK (reslock);
439	req = reqq_shift (&res_queue);	533	req = reqq_shift (&res_queue);
440		534
441	if (req)	535	if (req)
…		…
449	X_UNLOCK (reslock);	543	X_UNLOCK (reslock);
450		544
451	if (!req)	545	if (!req)
452	return 0;	546	return 0;
453		547
		548	X_LOCK (reqlock);
454	--nreqs;	549	--nreqs;
		550	X_UNLOCK (reqlock);
455		551
456	if (req->type == EIO_GROUP && req->size)	552	if (expect_false (req->type == EIO_GROUP && req->size))
457	{	553	{
458	req->int1 = 1; /* mark request as delayed */	554	req->int1 = 1; /* mark request as delayed */
459	continue;	555	continue;
460	}	556	}
461	else	557	else
462	{	558	{
463	int res = eio_finish (req);	559	int res = ETP_FINISH (req);
464	if (res)	560	if (expect_false (res))
465	return res;	561	return res;
466	}	562	}
467		563
468	if (maxreqs && !--maxreqs)	564	if (expect_false (maxreqs && !--maxreqs))
469	break;	565	break;
470		566
471	if (max_poll_time)	567	if (maxtime)
472	{	568	{
473	gettimeofday (&tv_now, 0);	569	gettimeofday (&tv_now, 0);
474		570
475	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	571	if (tvdiff (&tv_start, &tv_now) >= maxtime)
476	break;	572	break;
477	}	573	}
478	}	574	}
479		575
480	errno = EAGAIN;	576	errno = EAGAIN;
481	return -1;	577	return -1;
482	}	578	}
483		579
		580	static void etp_cancel (ETP_REQ *req)
		581	{
		582	X_LOCK (wrklock);
		583	req->flags \|= EIO_FLAG_CANCELLED;
		584	X_UNLOCK (wrklock);
		585
		586	eio_grp_cancel (req);
		587	}
		588
		589	static void etp_submit (ETP_REQ *req)
		590	{
		591	req->pri -= ETP_PRI_MIN;
		592
		593	if (expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
		594	if (expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		595
		596	if (expect_false (req->type == EIO_GROUP))
		597	{
		598	/* I hope this is worth it :/ */
		599	X_LOCK (reqlock);
		600	++nreqs;
		601	X_UNLOCK (reqlock);
		602
		603	X_LOCK (reslock);
		604
		605	++npending;
		606
		607	if (!reqq_push (&res_queue, req) && want_poll_cb)
		608	want_poll_cb ();
		609
		610	X_UNLOCK (reslock);
		611	}
		612	else
		613	{
		614	X_LOCK (reqlock);
		615	++nreqs;
		616	++nready;
		617	reqq_push (&req_queue, req);
		618	X_COND_SIGNAL (reqwait);
		619	X_UNLOCK (reqlock);
		620
		621	etp_maybe_start_thread ();
		622	}
		623	}
		624
		625	static void etp_set_max_poll_time (double nseconds)
		626	{
		627	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		628	max_poll_time = nseconds * EIO_TICKS;
		629	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		630	}
		631
		632	static void etp_set_max_poll_reqs (unsigned int maxreqs)
		633	{
		634	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		635	max_poll_reqs = maxreqs;
		636	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		637	}
		638
		639	static void etp_set_max_idle (unsigned int nthreads)
		640	{
		641	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		642	max_idle = nthreads;
		643	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		644	}
		645
		646	static void etp_set_idle_timeout (unsigned int seconds)
		647	{
		648	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		649	idle_timeout = seconds;
		650	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		651	}
		652
		653	static void etp_set_min_parallel (unsigned int nthreads)
		654	{
		655	if (wanted < nthreads)
		656	wanted = nthreads;
		657	}
		658
		659	static void etp_set_max_parallel (unsigned int nthreads)
		660	{
		661	if (wanted > nthreads)
		662	wanted = nthreads;
		663
		664	while (started > wanted)
		665	etp_end_thread ();
		666	}
		667
		668	/*****************************************************************************/
		669
		670	static void grp_try_feed (eio_req *grp)
		671	{
		672	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
		673	{
		674	grp->flags &= ~EIO_FLAG_GROUPADD;
		675
		676	EIO_FEED (grp);
		677
		678	/* stop if no progress has been made */
		679	if (!(grp->flags & EIO_FLAG_GROUPADD))
		680	{
		681	grp->feed = 0;
		682	break;
		683	}
		684	}
		685	}
		686
		687	static int grp_dec (eio_req *grp)
		688	{
		689	--grp->size;
		690
		691	/* call feeder, if applicable */
		692	grp_try_feed (grp);
		693
		694	/* finish, if done */
		695	if (!grp->size && grp->int1)
		696	return eio_finish (grp);
		697	else
		698	return 0;
		699	}
		700
		701	void eio_destroy (eio_req *req)
		702	{
		703	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
		704	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
		705
		706	EIO_DESTROY (req);
		707	}
		708
		709	static int eio_finish (eio_req *req)
		710	{
		711	int res = EIO_FINISH (req);
		712
		713	if (req->grp)
		714	{
		715	int res2;
		716	eio_req *grp = req->grp;
		717
		718	/* unlink request */
		719	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		720	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		721
		722	if (grp->grp_first == req)
		723	grp->grp_first = req->grp_next;
		724
		725	res2 = grp_dec (grp);
		726
		727	if (!res && res2)
		728	res = res2;
		729	}
		730
		731	eio_destroy (req);
		732
		733	return res;
		734	}
		735
		736	void eio_grp_cancel (eio_req *grp)
		737	{
		738	for (grp = grp->grp_first; grp; grp = grp->grp_next)
		739	eio_cancel (grp);
		740	}
		741
		742	void eio_cancel (eio_req *req)
		743	{
		744	etp_cancel (req);
		745	}
		746
		747	void eio_submit (eio_req *req)
		748	{
		749	etp_submit (req);
		750	}
		751
		752	unsigned int eio_nreqs (void)
		753	{
		754	return etp_nreqs ();
		755	}
		756
		757	unsigned int eio_nready (void)
		758	{
		759	return etp_nready ();
		760	}
		761
		762	unsigned int eio_npending (void)
		763	{
		764	return etp_npending ();
		765	}
		766
		767	unsigned int eio_nthreads (void)
		768	{
		769	return etp_nthreads ();
		770	}
		771
		772	void eio_set_max_poll_time (double nseconds)
		773	{
		774	etp_set_max_poll_time (nseconds);
		775	}
		776
		777	void eio_set_max_poll_reqs (unsigned int maxreqs)
		778	{
		779	etp_set_max_poll_reqs (maxreqs);
		780	}
		781
		782	void eio_set_max_idle (unsigned int nthreads)
		783	{
		784	etp_set_max_idle (nthreads);
		785	}
		786
		787	void eio_set_idle_timeout (unsigned int seconds)
		788	{
		789	etp_set_idle_timeout (seconds);
		790	}
		791
		792	void eio_set_min_parallel (unsigned int nthreads)
		793	{
		794	etp_set_min_parallel (nthreads);
		795	}
		796
		797	void eio_set_max_parallel (unsigned int nthreads)
		798	{
		799	etp_set_max_parallel (nthreads);
		800	}
		801
		802	int eio_poll (void)
		803	{
		804	return etp_poll ();
		805	}
		806
484	/*****************************************************************************/	807	/*****************************************************************************/
485	/* work around various missing functions */	808	/* work around various missing functions */
486		809
487	#if !HAVE_PREADWRITE	810	#if !HAVE_PREADWRITE
		811	# undef pread
		812	# undef pwrite
488	# define pread eio__pread	813	# define pread eio__pread
489	# define pwrite eio__pwrite	814	# 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		815
498	static ssize_t	816	static ssize_t
499	eio__pread (int fd, void *buf, size_t count, off_t offset)	817	eio__pread (int fd, void *buf, size_t count, off_t offset)
500	{	818	{
501	ssize_t res;	819	ssize_t res;
…		…
519		837
520	X_LOCK (preadwritelock);	838	X_LOCK (preadwritelock);
521	ooffset = lseek (fd, 0, SEEK_CUR);	839	ooffset = lseek (fd, 0, SEEK_CUR);
522	lseek (fd, offset, SEEK_SET);	840	lseek (fd, offset, SEEK_SET);
523	res = write (fd, buf, count);	841	res = write (fd, buf, count);
524	lseek (fd, offset, SEEK_SET);	842	lseek (fd, ooffset, SEEK_SET);
525	X_UNLOCK (preadwritelock);	843	X_UNLOCK (preadwritelock);
526		844
527	return res;	845	return res;
528	}	846	}
529	#endif	847	#endif
530		848
531	#ifndef HAVE_FUTIMES	849	#ifndef HAVE_UTIMES
532		850
		851	# undef utimes
533	# define utimes(path,times) eio__utimes (path, times)	852	# define utimes(path,times) eio__utimes (path, times)
534	# define futimes(fd,times) eio__futimes (fd, times)
535		853
536	static int	854	static int
537	eio__utimes (const char *filename, const struct timeval times[2])	855	eio__utimes (const char *filename, const struct timeval times[2])
538	{	856	{
539	if (times)	857	if (times)
…		…
547	}	865	}
548	else	866	else
549	return utime (filename, 0);	867	return utime (filename, 0);
550	}	868	}
551		869
		870	#endif
		871
		872	#ifndef HAVE_FUTIMES
		873
		874	# undef futimes
		875	# define futimes(fd,times) eio__futimes (fd, times)
		876
552	static int eio__futimes (int fd, const struct timeval tv[2])	877	static int eio__futimes (int fd, const struct timeval tv[2])
553	{	878	{
554	errno = ENOSYS;	879	errno = ENOSYS;
555	return -1;	880	return -1;
556	}	881	}
557		882
558	#endif	883	#endif
559		884
560	#if !HAVE_FDATASYNC	885	#if !HAVE_FDATASYNC
		886	# undef fdatasync
561	# define fdatasync fsync	887	# define fdatasync(fd) fsync (fd)
562	#endif	888	#endif
		889
		890	/* sync_file_range always needs emulation */
		891	int
		892	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
		893	{
		894	#if HAVE_SYNC_FILE_RANGE
		895	int res;
		896
		897	if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
		898	\|\| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
		899	\|\| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
		900	{
		901	flags = 0
		902	\| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
		903	\| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
		904	\| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
		905	}
		906
		907	res = sync_file_range (fd, offset, nbytes, flags);
		908
		909	if (!res \|\| errno != ENOSYS)
		910	return res;
		911	#endif
		912
		913	/* even though we could play tricks with the flags, it's better to always
		914	* call fdatasync, as that matches the expectation of its users best */
		915	return fdatasync (fd);
		916	}
563		917
564	#if !HAVE_READAHEAD	918	#if !HAVE_READAHEAD
		919	# undef readahead
565	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)	920	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
566		921
567	static ssize_t	922	static ssize_t
568	eio__readahead (int fd, off_t offset, size_t count, worker *self)	923	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
569	{	924	{
570	size_t todo = count;	925	size_t todo = count;
571	dBUF;	926	dBUF;
572		927
573	while (todo > 0)	928	while (todo > 0)
…		…
583	return count;	938	return count;
584	}	939	}
585		940
586	#endif	941	#endif
587		942
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 */	943	/* sendfile always needs emulation */
620	static ssize_t	944	static ssize_t
621	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, worker *self)	945	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
622	{	946	{
		947	ssize_t written = 0;
623	ssize_t res;	948	ssize_t res;
624		949
625	if (!count)	950	if (!count)
626	return 0;	951	return 0;
627		952
		953	for (;;)
		954	{
628	#if HAVE_SENDFILE	955	#if HAVE_SENDFILE
629	# if __linux	956	# if __linux
		957	off_t soffset = offset;
630	res = sendfile (ofd, ifd, &offset, count);	958	res = sendfile (ofd, ifd, &soffset, count);
631		959
632	# elif __freebsd	960	# elif __FreeBSD__
633	/*	961	/*
634	* Of course, the freebsd sendfile is a dire hack with no thoughts	962	* Of course, the freebsd sendfile is a dire hack with no thoughts
635	* wasted on making it similar to other I/O functions.	963	* wasted on making it similar to other I/O functions.
636	*/	964	*/
637	{
638	off_t sbytes;	965	off_t sbytes;
639	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	966	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
640		967
641	if (res < 0 && sbytes)	968	#if 0 /* according to the manpage, this is correct, but broken behaviour */
642	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */	969	/* freebsd' sendfile will return 0 on success */
		970	/* freebsd 8 documents it as only setting sbytes on EINTR and EAGAIN, but /
		971	/* not on e.g. EIO or EPIPE - sounds broken */
		972	if ((res < 0 && (errno == EAGAIN \|\| errno == EINTR) && sbytes) \|\| res == 0)
643	res = sbytes;	973	res = sbytes;
644	}	974	#endif
		975
		976	/* according to source inspection, this is correct, and useful behaviour */
		977	if (sbytes)
		978	res = sbytes;
		979
		980	# elif defined (__APPLE__)
		981	off_t sbytes = count;
		982	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
		983
		984	/* according to the manpage, sbytes is always valid */
		985	if (sbytes)
		986	res = sbytes;
645		987
646	# elif __hpux	988	# elif __hpux
647	res = sendfile (ofd, ifd, offset, count, 0, 0);	989	res = sendfile (ofd, ifd, offset, count, 0, 0);
648		990
649	# elif __solaris	991	# elif __solaris
650	{
651	struct sendfilevec vec;	992	struct sendfilevec vec;
652	size_t sbytes;	993	size_t sbytes;
653		994
654	vec.sfv_fd = ifd;	995	vec.sfv_fd = ifd;
655	vec.sfv_flag = 0;	996	vec.sfv_flag = 0;
656	vec.sfv_off = offset;	997	vec.sfv_off = offset;
657	vec.sfv_len = count;	998	vec.sfv_len = count;
658		999
659	res = sendfilev (ofd, &vec, 1, &sbytes);	1000	res = sendfilev (ofd, &vec, 1, &sbytes);
660		1001
661	if (res < 0 && sbytes)	1002	if (res < 0 && sbytes)
662	res = sbytes;	1003	res = sbytes;
663	}
664		1004
665	# endif	1005	# endif
		1006
		1007	#elif defined (_WIN32)
		1008	/* does not work, just for documentation of what would need to be done */
		1009	HANDLE h = TO_SOCKET (ifd);
		1010	SetFilePointer (h, offset, 0, FILE_BEGIN);
		1011	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
		1012
666	#else	1013	#else
667	res = -1;	1014	res = -1;
668	errno = ENOSYS;	1015	errno = ENOSYS;
669	#endif	1016	#endif
670		1017
		1018	/* we assume sendfile can copy at least 128mb in one go */
		1019	if (res <= 128 * 1024 * 1024)
		1020	{
		1021	if (res > 0)
		1022	written += res;
		1023
		1024	if (written)
		1025	return written;
		1026
		1027	break;
		1028	}
		1029	else
		1030	{
		1031	/* if we requested more, then probably the kernel was lazy */
		1032	written += res;
		1033	offset += res;
		1034	count -= res;
		1035
		1036	if (!count)
		1037	return written;
		1038	}
		1039	}
		1040
671	if (res < 0	1041	if (res < 0
672	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK	1042	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK
		1043	/* BSDs */
		1044	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
		1045	\|\| errno == ENOTSUP
		1046	#endif
		1047	\|\| errno == EOPNOTSUPP /* BSDs */
673	#if __solaris	1048	#if __solaris
674	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE	1049	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE
675	#endif	1050	#endif
676	)	1051	)
677	)	1052	)
…		…
708	}	1083	}
709		1084
710	return res;	1085	return res;
711	}	1086	}
712		1087
		1088	static signed char
		1089	eio_dent_cmp (const eio_dirent a, const eio_dirent b)
		1090	{
		1091	return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
		1092	: a->inode < b->inode ? -1
		1093	: a->inode > b->inode ? 1
		1094	: 0;
		1095	}
		1096
		1097	#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
		1098
		1099	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
		1100	#define EIO_SORT_FAST 60 /* when to only use insertion sort */
		1101
		1102	static void
		1103	eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
		1104	{
		1105	unsigned char bits [9 + sizeof (ino_t) * 8];
		1106	unsigned char *bit = bits;
		1107
		1108	assert (CHAR_BIT == 8);
		1109	assert (sizeof (eio_dirent) * 8 < 256);
		1110	assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
		1111	assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */
		1112
		1113	if (size <= EIO_SORT_FAST)
		1114	return;
		1115
		1116	/* first prepare an array of bits to test in our radix sort */
		1117	/* try to take endianness into account, as well as differences in ino_t sizes */
		1118	/* inode_bits must contain all inodes ORed together */
		1119	/* which is used to skip bits that are 0 everywhere, which is very common */
		1120	{
		1121	ino_t endianness;
		1122	int i, j;
		1123
		1124	/* we store the byte offset of byte n into byte n of "endianness" */
		1125	for (i = 0; i < sizeof (ino_t); ++i)
		1126	((unsigned char *)&endianness)[i] = i;
		1127
		1128	*bit++ = 0;
		1129
		1130	for (i = 0; i < sizeof (ino_t); ++i)
		1131	{
		1132	/* shifting off the byte offsets out of "endianness" */
		1133	int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
		1134	endianness >>= 8;
		1135
		1136	for (j = 0; j < 8; ++j)
		1137	if (inode_bits & (((ino_t)1) << (i * 8 + j)))
		1138	*bit++ = offs + j;
		1139	}
		1140
		1141	for (j = 0; j < 8; ++j)
		1142	if (score_bits & (1 << j))
		1143	bit++ = offsetof (eio_dirent, score) 8 + j;
		1144	}
		1145
		1146	/* now actually do the sorting (a variant of MSD radix sort) */
		1147	{
		1148	eio_dirent base_stk [9 + sizeof (ino_t) 8], *base;
		1149	eio_dirent end_stk [9 + sizeof (ino_t) 8], *end;
		1150	unsigned char bit_stk [9 + sizeof (ino_t) 8];
		1151	int stk_idx = 0;
		1152
		1153	base_stk [stk_idx] = dents;
		1154	end_stk [stk_idx] = dents + size;
		1155	bit_stk [stk_idx] = bit - 1;
		1156
		1157	do
		1158	{
		1159	base = base_stk [stk_idx];
		1160	end = end_stk [stk_idx];
		1161	bit = bit_stk [stk_idx];
		1162
		1163	for (;;)
		1164	{
		1165	unsigned char O = *bit >> 3;
		1166	unsigned char M = 1 << (*bit & 7);
		1167
		1168	eio_dirent *a = base;
		1169	eio_dirent *b = end;
		1170
		1171	if (b - a < EIO_SORT_CUTOFF)
		1172	break;
		1173
		1174	/* now bit-partition the array on the bit */
		1175	/* this ugly asymmetric loop seems to perform much better than typical */
		1176	/* partition algos found in the literature */
		1177	do
		1178	if (!(((unsigned char *)a)[O] & M))
		1179	++a;
		1180	else if (!(((unsigned char *)--b)[O] & M))
		1181	{
		1182	eio_dirent tmp = a; a = b; b = tmp;
		1183	++a;
		1184	}
		1185	while (b > a);
		1186
		1187	/* next bit, or stop, if no bits left in this path */
		1188	if (!*--bit)
		1189	break;
		1190
		1191	base_stk [stk_idx] = a;
		1192	end_stk [stk_idx] = end;
		1193	bit_stk [stk_idx] = bit;
		1194	++stk_idx;
		1195
		1196	end = a;
		1197	}
		1198	}
		1199	while (stk_idx--);
		1200	}
		1201	}
		1202
		1203	static void
		1204	eio_dent_insertion_sort (eio_dirent *dents, int size)
		1205	{
		1206	/* first move the smallest element to the front, to act as a sentinel */
		1207	{
		1208	int i;
		1209	eio_dirent *min = dents;
		1210
		1211	/* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
		1212	for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
		1213	if (EIO_DENT_CMP (dents [i], <, *min))
		1214	min = &dents [i];
		1215
		1216	/* swap elements 0 and j (minimum) */
		1217	{
		1218	eio_dirent tmp = dents; dents = min; min = tmp;
		1219	}
		1220	}
		1221
		1222	/* then do standard insertion sort, assuming that all elements are >= dents [0] */
		1223	{
		1224	eio_dirent i, j;
		1225
		1226	for (i = dents + 1; i < dents + size; ++i)
		1227	{
		1228	eio_dirent value = *i;
		1229
		1230	for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
		1231	j [1] = j [0];
		1232
		1233	j [1] = value;
		1234	}
		1235	}
		1236	}
		1237
		1238	static void
		1239	eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
		1240	{
		1241	if (size <= 1)
		1242	return; /* our insertion sort relies on size > 0 */
		1243
		1244	/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
		1245	/* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
		1246	eio_dent_radix_sort (dents, size, score_bits, inode_bits);
		1247
		1248	/* use an insertion sort at the end, or for small arrays, */
		1249	/* as insertion sort is more efficient for small partitions */
		1250	eio_dent_insertion_sort (dents, size);
		1251	}
		1252
713	/* read a full directory */	1253	/* read a full directory */
714	static void	1254	static void
715	eio__scandir (eio_req req, worker self)	1255	eio__scandir (eio_req req, etp_worker self)
716	{	1256	{
717	DIR *dirp;	1257	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;	1258	EIO_STRUCT_DIRENT *entp;
724	char name, names;	1259	char name, names;
725	int memlen = 4096;	1260	int namesalloc = 4096;
726	int memofs = 0;	1261	int namesoffs = 0;
		1262	int flags = req->int1;
		1263	eio_dirent *dents = 0;
		1264	int dentalloc = 128;
727	int res = 0;	1265	int dentoffs = 0;
		1266	ino_t inode_bits = 0;
		1267
		1268	req->result = -1;
		1269
		1270	if (!(flags & EIO_READDIR_DENTS))
		1271	flags &= ~(EIO_READDIR_DIRS_FIRST \| EIO_READDIR_STAT_ORDER);
728		1272
729	X_LOCK (wrklock);	1273	X_LOCK (wrklock);
		1274	/* the corresponding closedir is in ETP_WORKER_CLEAR */
730	self->dirp = dirp = opendir (req->ptr1);	1275	self->dirp = dirp = opendir (req->ptr1);
731	self->dbuf = u = malloc (sizeof (*u));	1276
732	req->flags \|= EIO_FLAG_PTR2_FREE;	1277	req->flags \|= EIO_FLAG_PTR1_FREE \| EIO_FLAG_PTR2_FREE;
		1278	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
733	req->ptr2 = names = malloc (memlen);	1279	req->ptr2 = names = malloc (namesalloc);
734	X_UNLOCK (wrklock);	1280	X_UNLOCK (wrklock);
735		1281
736	if (dirp && u && names)	1282	if (dirp && names && (!flags \|\| dents))
737	for (;;)	1283	for (;;)
738	{	1284	{
739	errno = 0;	1285	errno = 0;
740	readdir_r (dirp, &u->d, &entp);	1286	entp = readdir (dirp);
741		1287
742	if (!entp)	1288	if (!entp)
		1289	{
		1290	if (errno)
		1291	break;
		1292
		1293	/* sort etc. */
		1294	req->int1 = flags;
		1295	req->result = dentoffs;
		1296
		1297	if (flags & EIO_READDIR_STAT_ORDER)
		1298	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
		1299	else if (flags & EIO_READDIR_DIRS_FIRST)
		1300	if (flags & EIO_READDIR_FOUND_UNKNOWN)
		1301	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
		1302	else
		1303	{
		1304	/* in this case, all is known, and we just put dirs first and sort them */
		1305	eio_dirent *oth = dents + dentoffs;
		1306	eio_dirent *dir = dents;
		1307
		1308	/* now partition dirs to the front, and non-dirs to the back */
		1309	/* by walking from both sides and swapping if necessary */
		1310	while (oth > dir)
		1311	{
		1312	if (dir->type == EIO_DT_DIR)
		1313	++dir;
		1314	else if ((--oth)->type == EIO_DT_DIR)
		1315	{
		1316	eio_dirent tmp = dir; dir = oth; oth = tmp;
		1317
		1318	++dir;
		1319	}
		1320	}
		1321
		1322	/* now sort the dirs only (dirs all have the same score) */
		1323	eio_dent_sort (dents, dir - dents, 0, inode_bits);
		1324	}
		1325
743	break;	1326	break;
		1327	}
744		1328
		1329	/* now add the entry to our list(s) */
745	name = entp->d_name;	1330	name = entp->d_name;
746		1331
		1332	/* skip . and .. entries */
747	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))	1333	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
748	{	1334	{
749	int len = strlen (name) + 1;	1335	int len = D_NAMLEN (entp) + 1;
750		1336
751	res++;	1337	while (expect_false (namesoffs + len > namesalloc))
752
753	while (memofs + len > memlen)
754	{	1338	{
755	memlen *= 2;	1339	namesalloc *= 2;
756	X_LOCK (wrklock);	1340	X_LOCK (wrklock);
757	req->ptr2 = names = realloc (names, memlen);	1341	req->ptr2 = names = realloc (names, namesalloc);
758	X_UNLOCK (wrklock);	1342	X_UNLOCK (wrklock);
759		1343
760	if (!names)	1344	if (!names)
761	break;	1345	break;
762	}	1346	}
763		1347
764	memcpy (names + memofs, name, len);	1348	memcpy (names + namesoffs, name, len);
		1349
		1350	if (dents)
		1351	{
		1352	struct eio_dirent *ent;
		1353
		1354	if (expect_false (dentoffs == dentalloc))
		1355	{
		1356	dentalloc *= 2;
		1357	X_LOCK (wrklock);
		1358	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
		1359	X_UNLOCK (wrklock);
		1360
		1361	if (!dents)
		1362	break;
		1363	}
		1364
		1365	ent = dents + dentoffs;
		1366
		1367	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
		1368	ent->namelen = len - 1;
		1369	ent->inode = D_INO (entp);
		1370
		1371	inode_bits \|= ent->inode;
		1372
		1373	switch (D_TYPE (entp))
		1374	{
		1375	default:
		1376	ent->type = EIO_DT_UNKNOWN;
		1377	flags \|= EIO_READDIR_FOUND_UNKNOWN;
		1378	break;
		1379
		1380	#ifdef DT_FIFO
		1381	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
		1382	#endif
		1383	#ifdef DT_CHR
		1384	case DT_CHR: ent->type = EIO_DT_CHR; break;
		1385	#endif
		1386	#ifdef DT_MPC
		1387	case DT_MPC: ent->type = EIO_DT_MPC; break;
		1388	#endif
		1389	#ifdef DT_DIR
		1390	case DT_DIR: ent->type = EIO_DT_DIR; break;
		1391	#endif
		1392	#ifdef DT_NAM
		1393	case DT_NAM: ent->type = EIO_DT_NAM; break;
		1394	#endif
		1395	#ifdef DT_BLK
		1396	case DT_BLK: ent->type = EIO_DT_BLK; break;
		1397	#endif
		1398	#ifdef DT_MPB
		1399	case DT_MPB: ent->type = EIO_DT_MPB; break;
		1400	#endif
		1401	#ifdef DT_REG
		1402	case DT_REG: ent->type = EIO_DT_REG; break;
		1403	#endif
		1404	#ifdef DT_NWK
		1405	case DT_NWK: ent->type = EIO_DT_NWK; break;
		1406	#endif
		1407	#ifdef DT_CMP
		1408	case DT_CMP: ent->type = EIO_DT_CMP; break;
		1409	#endif
		1410	#ifdef DT_LNK
		1411	case DT_LNK: ent->type = EIO_DT_LNK; break;
		1412	#endif
		1413	#ifdef DT_SOCK
		1414	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
		1415	#endif
		1416	#ifdef DT_DOOR
		1417	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
		1418	#endif
		1419	#ifdef DT_WHT
		1420	case DT_WHT: ent->type = EIO_DT_WHT; break;
		1421	#endif
		1422	}
		1423
		1424	ent->score = 7;
		1425
		1426	if (flags & EIO_READDIR_DIRS_FIRST)
		1427	{
		1428	if (ent->type == EIO_DT_UNKNOWN)
		1429	{
		1430	if (name == '.') / leading dots are likely directories, and, in any case, rare */
		1431	ent->score = 1;
		1432	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
		1433	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
		1434	}
		1435	else if (ent->type == EIO_DT_DIR)
		1436	ent->score = 0;
		1437	}
		1438	}
		1439
765	memofs += len;	1440	namesoffs += len;
		1441	++dentoffs;
		1442	}
		1443
		1444	if (EIO_CANCELLED (req))
		1445	{
		1446	errno = ECANCELED;
		1447	break;
766	}	1448	}
767	}	1449	}
		1450	}
768		1451
769	if (errno)	1452	#ifdef PAGESIZE
770	res = -1;	1453	# define eio_pagesize() PAGESIZE
		1454	#else
		1455	static intptr_t
		1456	eio_pagesize (void)
		1457	{
		1458	static intptr_t page;
		1459
		1460	if (!page)
		1461	page = sysconf (_SC_PAGESIZE);
		1462
		1463	return page;
		1464	}
		1465	#endif
		1466
		1467	static void
		1468	eio_page_align (void *addr, size_t length)
		1469	{
		1470	intptr_t mask = eio_pagesize () - 1;
		1471
		1472	/* round down addr */
		1473	intptr_t adj = mask & (intptr_t)*addr;
		1474
		1475	addr = (void )((intptr_t)*addr - adj);
		1476	*length += adj;
		1477
		1478	/* round up length */
		1479	length = (length + mask) & ~mask;
		1480	}
		1481
		1482	#if !_POSIX_MEMLOCK
		1483	# define eio__mlockall(a) ((errno = ENOSYS), -1)
		1484	#else
		1485
		1486	static int
		1487	eio__mlockall (int flags)
		1488	{
		1489	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1490	extern int mallopt (int, int);
		1491	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1492	#endif
		1493
		1494	if (EIO_MCL_CURRENT != MCL_CURRENT
		1495	\|\| EIO_MCL_FUTURE != MCL_FUTURE)
		1496	{
		1497	flags = 0
		1498	\| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
		1499	\| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
		1500	}
		1501
		1502	return mlockall (flags);
		1503	}
		1504	#endif
		1505
		1506	#if !_POSIX_MEMLOCK_RANGE
		1507	# define eio__mlock(a,b) ((errno = ENOSYS), -1)
		1508	#else
		1509
		1510	static int
		1511	eio__mlock (void *addr, size_t length)
		1512	{
		1513	eio_page_align (&addr, &length);
		1514
		1515	return mlock (addr, length);
		1516	}
		1517
		1518	#endif
		1519
		1520	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1521	# define eio__msync(a,b,c) ((errno = ENOSYS), -1)
		1522	#else
		1523
		1524	int
		1525	eio__msync (void *mem, size_t len, int flags)
		1526	{
		1527	eio_page_align (&mem, &len);
		1528
		1529	if (EIO_MS_ASYNC != MS_SYNC
		1530	\|\| EIO_MS_INVALIDATE != MS_INVALIDATE
		1531	\|\| EIO_MS_SYNC != MS_SYNC)
		1532	{
		1533	flags = 0
		1534	\| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
		1535	\| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
		1536	\| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
		1537	}
		1538
		1539	return msync (mem, len, flags);
		1540	}
		1541
		1542	#endif
		1543
		1544	int
		1545	eio__mtouch (eio_req *req)
		1546	{
		1547	void *mem = req->ptr2;
		1548	size_t len = req->size;
		1549	int flags = req->int1;
		1550
		1551	eio_page_align (&mem, &len);
		1552
771		1553	{
772	req->result = res;	1554	intptr_t addr = (intptr_t)mem;
		1555	intptr_t end = addr + len;
		1556	intptr_t page = eio_pagesize ();
		1557
		1558	if (addr < end)
		1559	if (flags & EIO_MT_MODIFY) /* modify */
		1560	do { ((volatile sig_atomic_t )addr) \|= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1561	else
		1562	do { ((volatile sig_atomic_t )addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1563	}
		1564
		1565	return 0;
773	}	1566	}
774		1567
775	/*****************************************************************************/	1568	/*****************************************************************************/
776		1569
777	#define ALLOC(len) \	1570	#define ALLOC(len) \
…		…
787	req->result = -1; \	1580	req->result = -1; \
788	break; \	1581	break; \
789	} \	1582	} \
790	}	1583	}
791		1584
792	X_THREAD_PROC (eio_proc)	1585	X_THREAD_PROC (etp_proc)
793	{	1586	{
794	eio_req *req;	1587	ETP_REQ *req;
795	struct timespec ts;	1588	struct timespec ts;
796	worker self = (worker )thr_arg;	1589	etp_worker self = (etp_worker )thr_arg;
797		1590
798	/* try to distribute timeouts somewhat randomly */	1591	/* try to distribute timeouts somewhat randomly */
799	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1592	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
800		1593
801	for (;;)	1594	for (;;)
802	{	1595	{
803	ts.tv_sec = time (0) + IDLE_TIMEOUT;
804
805	X_LOCK (reqlock);	1596	X_LOCK (reqlock);
806		1597
807	for (;;)	1598	for (;;)
808	{	1599	{
809	self->req = req = reqq_shift (&req_queue);	1600	self->req = req = reqq_shift (&req_queue);
…		…
811	if (req)	1602	if (req)
812	break;	1603	break;
813		1604
814	++idle;	1605	++idle;
815		1606
		1607	ts.tv_sec = time (0) + idle_timeout;
816	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1608	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
817	{	1609	{
818	if (idle > max_idle)	1610	if (idle > max_idle)
819	{	1611	{
820	--idle;	1612	--idle;
…		…
825	goto quit;	1617	goto quit;
826	}	1618	}
827		1619
828	/* we are allowed to idle, so do so without any timeout */	1620	/* we are allowed to idle, so do so without any timeout */
829	X_COND_WAIT (reqwait, reqlock);	1621	X_COND_WAIT (reqwait, reqlock);
830	ts.tv_sec = time (0) + IDLE_TIMEOUT;
831	}	1622	}
832		1623
833	--idle;	1624	--idle;
834	}	1625	}
835		1626
836	--nready;	1627	--nready;
837		1628
838	X_UNLOCK (reqlock);	1629	X_UNLOCK (reqlock);
839		1630
840	errno = 0; /* strictly unnecessary */	1631	if (req->type < 0)
		1632	goto quit;
841		1633
842	if (!EIO_CANCELLED (req))	1634	if (!EIO_CANCELLED (req))
843	switch (req->type)	1635	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		1636
944	X_LOCK (reslock);	1637	X_LOCK (reslock);
945		1638
946	++npending;	1639	++npending;
947		1640
948	if (!reqq_push (&res_queue, req) && want_poll_cb)	1641	if (!reqq_push (&res_queue, req) && want_poll_cb)
949	want_poll_cb ();	1642	want_poll_cb ();
950		1643
951	self->req = 0;	1644	self->req = 0;
952	worker_clear (self);	1645	etp_worker_clear (self);
953		1646
954	X_UNLOCK (reslock);	1647	X_UNLOCK (reslock);
955	}	1648	}
956		1649
957	quit:	1650	quit:
958	X_LOCK (wrklock);	1651	X_LOCK (wrklock);
959	worker_free (self);	1652	etp_worker_free (self);
960	X_UNLOCK (wrklock);	1653	X_UNLOCK (wrklock);
961		1654
962	return 0;	1655	return 0;
963	}	1656	}
964		1657
965	/*****************************************************************************/	1658	/*****************************************************************************/
966		1659
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))	1660	int eio_init (void (want_poll)(void), void (done_poll)(void))
1024	{	1661	{
1025	want_poll_cb = want_poll;	1662	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	}	1663	}
1041		1664
1042	static void eio_api_destroy (eio_req *req)	1665	static void eio_api_destroy (eio_req *req)
1043	{	1666	{
1044	free (req);	1667	free (req);
…		…
1049	\	1672	\
1050	req = (eio_req )calloc (1, sizeof req); \	1673	req = (eio_req )calloc (1, sizeof req); \
1051	if (!req) \	1674	if (!req) \
1052	return 0; \	1675	return 0; \
1053	\	1676	\
1054	req->type = rtype; \	1677	req->type = rtype; \
1055	req->pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \	1678	req->pri = pri; \
1056	req->finish = cb; \	1679	req->finish = cb; \
		1680	req->data = data; \
1057	req->destroy = eio_api_destroy;	1681	req->destroy = eio_api_destroy;
1058		1682
1059	#define SEND eio_submit (req); return req	1683	#define SEND eio_submit (req); return req
1060		1684
1061	#define PATH \	1685	#define PATH \
…		…
1065	{ \	1689	{ \
1066	eio_api_destroy (req); \	1690	eio_api_destroy (req); \
1067	return 0; \	1691	return 0; \
1068	}	1692	}
1069		1693
1070	eio_req *eio_nop (eio_cb cb)	1694	static void eio_execute (etp_worker self, eio_req req)
		1695	{
		1696	switch (req->type)
		1697	{
		1698	case EIO_READ: ALLOC (req->size);
		1699	req->result = req->offs >= 0
		1700	? pread (req->int1, req->ptr2, req->size, req->offs)
		1701	: read (req->int1, req->ptr2, req->size); break;
		1702	case EIO_WRITE: req->result = req->offs >= 0
		1703	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		1704	: write (req->int1, req->ptr2, req->size); break;
		1705
		1706	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1707	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
		1708
		1709	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1710	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1711	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1712	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1713	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1714	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1715
		1716	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		1717	req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		1718	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		1719	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		1720
		1721	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1722	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1723	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
		1724	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
		1725	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1726	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		1727
		1728	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
		1729	case EIO_CLOSE: req->result = close (req->int1); break;
		1730	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		1731	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		1732	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		1733	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		1734	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		1735	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		1736	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		1737	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
		1738
		1739	case EIO_READLINK: ALLOC (PATH_MAX);
		1740	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
		1741
		1742	case EIO_SYNC: req->result = 0; sync (); break;
		1743	case EIO_FSYNC: req->result = fsync (req->int1); break;
		1744	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		1745	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
		1746	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
		1747	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
		1748	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
		1749	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		1750
		1751	case EIO_READDIR: eio__scandir (req, self); break;
		1752
		1753	case EIO_BUSY:
		1754	#ifdef _WIN32
		1755	Sleep (req->nv1 * 1e3);
		1756	#else
		1757	{
		1758	struct timeval tv;
		1759
		1760	tv.tv_sec = req->nv1;
		1761	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6;
		1762
		1763	req->result = select (0, 0, 0, 0, &tv);
		1764	}
		1765	#endif
		1766	break;
		1767
		1768	case EIO_UTIME:
		1769	case EIO_FUTIME:
		1770	{
		1771	struct timeval tv[2];
		1772	struct timeval *times;
		1773
		1774	if (req->nv1 != -1. \|\| req->nv2 != -1.)
		1775	{
		1776	tv[0].tv_sec = req->nv1;
		1777	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1778	tv[1].tv_sec = req->nv2;
		1779	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1780
		1781	times = tv;
		1782	}
		1783	else
		1784	times = 0;
		1785
		1786	req->result = req->type == EIO_FUTIME
		1787	? futimes (req->int1, times)
		1788	: utimes (req->ptr1, times);
		1789	}
		1790	break;
		1791
		1792	case EIO_GROUP:
		1793	abort (); /* handled in eio_request */
		1794
		1795	case EIO_NOP:
		1796	req->result = 0;
		1797	break;
		1798
		1799	case EIO_CUSTOM:
		1800	req->feed (req);
		1801	break;
		1802
		1803	default:
		1804	errno = ENOSYS;
		1805	req->result = -1;
		1806	break;
		1807	}
		1808
		1809	req->errorno = errno;
		1810	}
		1811
		1812	#ifndef EIO_NO_WRAPPERS
		1813
		1814	eio_req eio_nop (int pri, eio_cb cb, void data)
1071	{	1815	{
1072	REQ (EIO_NOP); SEND;	1816	REQ (EIO_NOP); SEND;
1073	}	1817	}
1074		1818
1075	eio_req *eio_busy (double delay, eio_cb cb)	1819	eio_req eio_busy (double delay, int pri, eio_cb cb, void data)
1076	{	1820	{
1077	REQ (EIO_BUSY); req->nv1 = delay; SEND;	1821	REQ (EIO_BUSY); req->nv1 = delay; SEND;
1078	}	1822	}
1079		1823
1080	eio_req *eio_sync (eio_cb cb)	1824	eio_req eio_sync (int pri, eio_cb cb, void data)
1081	{	1825	{
1082	REQ (EIO_SYNC); SEND;	1826	REQ (EIO_SYNC); SEND;
1083	}	1827	}
1084		1828
1085	eio_req *eio_fsync (int fd, eio_cb cb)	1829	eio_req eio_fsync (int fd, int pri, eio_cb cb, void data)
1086	{	1830	{
1087	REQ (EIO_FSYNC); req->int1 = fd; SEND;	1831	REQ (EIO_FSYNC); req->int1 = fd; SEND;
1088	}	1832	}
1089		1833
		1834	eio_req eio_msync (void addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1835	{
		1836	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1837	}
		1838
		1839	eio_req eio_mtouch (void addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1840	{
		1841	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1842	}
		1843
		1844	eio_req eio_mlock (void addr, size_t length, int pri, eio_cb cb, void *data)
		1845	{
		1846	REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND;
		1847	}
		1848
		1849	eio_req eio_mlockall (int flags, int pri, eio_cb cb, void data)
		1850	{
		1851	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
		1852	}
		1853
		1854	eio_req eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void data)
		1855	{
		1856	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		1857	}
		1858
1090	eio_req *eio_fdatasync (int fd, eio_cb cb)	1859	eio_req eio_fdatasync (int fd, int pri, eio_cb cb, void data)
1091	{	1860	{
1092	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;	1861	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1093	}	1862	}
1094		1863
1095	eio_req *eio_close (int fd, eio_cb cb)	1864	eio_req eio_close (int fd, int pri, eio_cb cb, void data)
1096	{	1865	{
1097	REQ (EIO_CLOSE); req->int1 = fd; SEND;	1866	REQ (EIO_CLOSE); req->int1 = fd; SEND;
1098	}	1867	}
1099		1868
1100	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb)	1869	eio_req eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void data)
1101	{	1870	{
1102	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;	1871	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
1103	}	1872	}
1104		1873
1105	eio_req eio_read (int fd, void data, size_t length, off_t offset, eio_cb cb)	1874	eio_req eio_read (int fd, void buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1106	{	1875	{
1107	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	1876	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1108	}	1877	}
1109		1878
1110	eio_req eio_write (int fd, void data, size_t length, off_t offset, eio_cb cb)	1879	eio_req eio_write (int fd, void buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1111	{	1880	{
1112	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	1881	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1113	}	1882	}
1114		1883
1115	eio_req *eio_fstat (int fd, eio_cb cb)	1884	eio_req eio_fstat (int fd, int pri, eio_cb cb, void data)
1116	{	1885	{
1117	REQ (EIO_FSTAT); req->int1 = fd; SEND;	1886	REQ (EIO_FSTAT); req->int1 = fd; SEND;
1118	}	1887	}
1119		1888
		1889	eio_req eio_fstatvfs (int fd, int pri, eio_cb cb, void data)
		1890	{
		1891	REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
		1892	}
		1893
1120	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb)	1894	eio_req eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void data)
1121	{	1895	{
1122	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;	1896	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
1123	}	1897	}
1124		1898
1125	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb)	1899	eio_req eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void data)
1126	{	1900	{
1127	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;	1901	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
1128	}	1902	}
1129		1903
1130	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb)	1904	eio_req eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void data)
1131	{	1905	{
1132	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;	1906	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1133	}	1907	}
1134		1908
1135	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb)	1909	eio_req eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void data)
1136	{	1910	{
1137	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	1911	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1138	}	1912	}
1139		1913
1140	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb)	1914	eio_req eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void data)
1141	{	1915	{
1142	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;	1916	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
1143	}	1917	}
1144		1918
1145	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb)	1919	eio_req eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void data)
1146	{	1920	{
1147	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;	1921	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
1148	}	1922	}
1149		1923
1150	eio_req eio_open (const char path, int flags, mode_t mode, eio_cb cb)	1924	eio_req eio_open (const char path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
1151	{	1925	{
1152	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;	1926	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
1153	}	1927	}
1154		1928
1155	eio_req eio_utime (const char path, double atime, double mtime, eio_cb cb)	1929	eio_req eio_utime (const char path, double atime, double mtime, int pri, eio_cb cb, void *data)
1156	{	1930	{
1157	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;	1931	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
1158	}	1932	}
1159		1933
1160	eio_req eio_truncate (const char path, off_t offset, eio_cb cb)	1934	eio_req eio_truncate (const char path, off_t offset, int pri, eio_cb cb, void *data)
1161	{	1935	{
1162	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;	1936	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1163	}	1937	}
1164		1938
1165	eio_req eio_chown (const char path, uid_t uid, gid_t gid, eio_cb cb)	1939	eio_req eio_chown (const char path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
1166	{	1940	{
1167	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	1941	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1168	}	1942	}
1169		1943
1170	eio_req eio_chmod (const char path, mode_t mode, eio_cb cb)	1944	eio_req eio_chmod (const char path, mode_t mode, int pri, eio_cb cb, void *data)
1171	{	1945	{
1172	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;	1946	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
1173	}	1947	}
1174		1948
1175	eio_req eio_mkdir (const char path, mode_t mode, eio_cb cb)	1949	eio_req eio_mkdir (const char path, mode_t mode, int pri, eio_cb cb, void *data)
1176	{	1950	{
1177	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;	1951	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
1178	}	1952	}
1179		1953
1180	static eio_req *	1954	static eio_req *
1181	eio__1path (int type, const char *path, eio_cb cb)	1955	eio__1path (int type, const char path, int pri, eio_cb cb, void data)
1182	{	1956	{
1183	REQ (type); PATH; SEND;	1957	REQ (type); PATH; SEND;
1184	}	1958	}
1185		1959
1186	eio_req eio_readlink (const char path, eio_cb cb)	1960	eio_req eio_readlink (const char path, int pri, eio_cb cb, void *data)
1187	{	1961	{
1188	return eio__1path (EIO_READLINK, path, cb);	1962	return eio__1path (EIO_READLINK, path, pri, cb, data);
1189	}	1963	}
1190		1964
1191	eio_req eio_stat (const char path, eio_cb cb)	1965	eio_req eio_stat (const char path, int pri, eio_cb cb, void *data)
1192	{	1966	{
1193	return eio__1path (EIO_STAT, path, cb);	1967	return eio__1path (EIO_STAT, path, pri, cb, data);
1194	}	1968	}
1195		1969
1196	eio_req eio_lstat (const char path, eio_cb cb)	1970	eio_req eio_lstat (const char path, int pri, eio_cb cb, void *data)
1197	{	1971	{
1198	return eio__1path (EIO_LSTAT, path, cb);	1972	return eio__1path (EIO_LSTAT, path, pri, cb, data);
1199	}	1973	}
1200		1974
		1975	eio_req eio_statvfs (const char path, int pri, eio_cb cb, void *data)
		1976	{
		1977	return eio__1path (EIO_STATVFS, path, pri, cb, data);
		1978	}
		1979
1201	eio_req eio_unlink (const char path, eio_cb cb)	1980	eio_req eio_unlink (const char path, int pri, eio_cb cb, void *data)
1202	{	1981	{
1203	return eio__1path (EIO_UNLINK, path, cb);	1982	return eio__1path (EIO_UNLINK, path, pri, cb, data);
1204	}	1983	}
1205		1984
1206	eio_req eio_rmdir (const char path, eio_cb cb)	1985	eio_req eio_rmdir (const char path, int pri, eio_cb cb, void *data)
1207	{	1986	{
1208	return eio__1path (EIO_RMDIR, path, cb);	1987	return eio__1path (EIO_RMDIR, path, pri, cb, data);
1209	}	1988	}
1210		1989
1211	eio_req eio_readdir (const char path, eio_cb cb)	1990	eio_req eio_readdir (const char path, int flags, int pri, eio_cb cb, void *data)
1212	{	1991	{
1213	return eio__1path (EIO_READDIR, path, cb);	1992	REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
1214	}	1993	}
1215		1994
1216	eio_req eio_mknod (const char path, mode_t mode, dev_t dev, eio_cb cb)	1995	eio_req eio_mknod (const char path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1217	{	1996	{
1218	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND;	1997	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND;
1219	}	1998	}
1220		1999
1221	static eio_req *	2000	static eio_req *
1222	eio__2path (int type, const char path, const char new_path, eio_cb cb)	2001	eio__2path (int type, const char path, const char new_path, int pri, eio_cb cb, void *data)
1223	{	2002	{
1224	REQ (type); PATH;	2003	REQ (type); PATH;
1225		2004
1226	req->flags \|= EIO_FLAG_PTR2_FREE;	2005	req->flags \|= EIO_FLAG_PTR2_FREE;
1227	req->ptr2 = strdup (new_path);	2006	req->ptr2 = strdup (new_path);
…		…
1232	}	2011	}
1233		2012
1234	SEND;	2013	SEND;
1235	}	2014	}
1236		2015
1237	eio_req eio_link (const char path, const char *new_path, eio_cb cb)	2016	eio_req eio_link (const char path, const char new_path, int pri, eio_cb cb, void data)
1238	{	2017	{
1239	return eio__2path (EIO_LINK, path, new_path, cb);	2018	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
1240	}	2019	}
1241		2020
1242	eio_req eio_symlink (const char path, const char *new_path, eio_cb cb)	2021	eio_req eio_symlink (const char path, const char new_path, int pri, eio_cb cb, void data)
1243	{	2022	{
1244	return eio__2path (EIO_SYMLINK, path, new_path, cb);	2023	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
1245	}	2024	}
1246		2025
1247	eio_req eio_rename (const char path, const char *new_path, eio_cb cb)	2026	eio_req eio_rename (const char path, const char new_path, int pri, eio_cb cb, void data)
1248	{	2027	{
1249	return eio__2path (EIO_RENAME, path, new_path, cb);	2028	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
		2029	}
		2030
		2031	eio_req eio_custom (void ()(eio_req ) execute, int pri, eio_cb cb, void data);
		2032	{
		2033	REQ (EIO_CUSTOM); req->feed = execute; SEND;
		2034	}
		2035
		2036	#endif
		2037
		2038	eio_req eio_grp (eio_cb cb, void data)
		2039	{
		2040	const int pri = EIO_PRI_MAX;
		2041
		2042	REQ (EIO_GROUP); SEND;
1250	}	2043	}
1251		2044
1252	#undef REQ	2045	#undef REQ
1253	#undef PATH	2046	#undef PATH
1254	#undef SEND	2047	#undef SEND
…		…
1273		2066
1274	void eio_grp_add (eio_req grp, eio_req req)	2067	void eio_grp_add (eio_req grp, eio_req req)
1275	{	2068	{
1276	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2069	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
1277		2070
		2071	grp->flags \|= EIO_FLAG_GROUPADD;
		2072
1278	++grp->size;	2073	++grp->size;
1279	req->grp = grp;	2074	req->grp = grp;
1280		2075
1281	req->grp_prev = 0;	2076	req->grp_prev = 0;
1282	req->grp_next = grp->grp_first;	2077	req->grp_next = grp->grp_first;
…		…
1290	/*****************************************************************************/	2085	/*****************************************************************************/
1291	/* misc garbage */	2086	/* misc garbage */
1292		2087
1293	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)	2088	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
1294	{	2089	{
1295	worker wrk;	2090	etp_worker wrk;
		2091	ssize_t ret;
1296		2092
1297	wrk.dbuf = 0;	2093	wrk.dbuf = 0;
1298		2094
1299	eio__sendfile (ofd, ifd, offset, count, &wrk);	2095	ret = eio__sendfile (ofd, ifd, offset, count, &wrk);
1300		2096
1301	if (wrk.dbuf)	2097	if (wrk.dbuf)
1302	free (wrk.dbuf);	2098	free (wrk.dbuf);
1303	}
1304		2099
		2100	return ret;
		2101	}
		2102

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Comparing libeio/eio.c (file contents): Revision 1.9 by root, Mon May 12 00:31:43 2008 UTC vs. Revision 1.69 by root, Fri Jun 10 06:50:42 2011 UTC

Diff Legend

Comparing libeio/eio.c (file contents):
Revision 1.9 by root, Mon May 12 00:31:43 2008 UTC vs.
Revision 1.69 by root, Fri Jun 10 06:50:42 2011 UTC