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Comparing cvsroot/libeio/eio.c (file contents):
Revision 1.19 by root, Tue Jun 17 23:34:20 2008 UTC vs.
Revision 1.90 by root, Sat Jul 16 16:46:10 2011 UTC

1	/*	1	/*
2	* libeio implementation	2	* libeio implementation
3	*	3	*
4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libeio@schmorp.de>	4	* Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libeio@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without modifica-	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* tion, are permitted provided that the following conditions are met:	8	* tion, are permitted provided that the following conditions are met:
9	*	9	*
…		…
35	* and other provisions required by the GPL. If you do not delete the	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	36	* provisions above, a recipient may use your version of this file under
37	* either the BSD or the GPL.	37	* either the BSD or the GPL.
38	*/	38	*/
39		39
		40	#ifndef _WIN32
		41	# include "config.h"
		42	#endif
		43
40	#include "eio.h"	44	#include "eio.h"
		45	#include "ecb.h"
		46
		47	#ifdef EIO_STACKSIZE
		48	# define XTHREAD_STACKSIZE EIO_STACKSIZE
		49	#endif
41	#include "xthread.h"	50	#include "xthread.h"
42		51
43	#include <errno.h>	52	#include <errno.h>
44	#include <stddef.h>	53	#include <stddef.h>
45	#include <stdlib.h>	54	#include <stdlib.h>
…		…
49	#include <sys/stat.h>	58	#include <sys/stat.h>
50	#include <limits.h>	59	#include <limits.h>
51	#include <fcntl.h>	60	#include <fcntl.h>
52	#include <assert.h>	61	#include <assert.h>
53		62
		63	/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */
		64	/* intptr_t only comes from stdint.h, says idiot openbsd coder */
		65	#if HAVE_STDINT_H
		66	# include <stdint.h>
		67	#endif
		68
		69	#ifndef ECANCELED
		70	# define ECANCELED EDOM
		71	#endif
		72	#ifndef ELOOP
		73	# define ELOOP EDOM
		74	#endif
		75
		76	static void eio_destroy (eio_req *req);
		77
54	#ifndef EIO_FINISH	78	#ifndef EIO_FINISH
55	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	79	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
56	#endif	80	#endif
57		81
58	#ifndef EIO_DESTROY	82	#ifndef EIO_DESTROY
…		…
61		85
62	#ifndef EIO_FEED	86	#ifndef EIO_FEED
63	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)	87	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)
64	#endif	88	#endif
65		89
		90	#ifndef EIO_FD_TO_WIN32_HANDLE
		91	# define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		92	#endif
		93	#ifndef EIO_WIN32_HANDLE_TO_FD
		94	# define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		95	#endif
		96
		97	#define EIO_ERRNO(errval,retval) ((errno = errval), retval)
		98
		99	#define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1)
		100
66	#ifdef _WIN32	101	#ifdef _WIN32
67		102
68	/*doh*/	103	#undef PAGESIZE
		104	#define PAGESIZE 4096 /* GetSystemInfo? */
		105
		106	#ifdef EIO_STRUCT_STATI64
		107	#define stat(path,buf) _stati64 (path,buf)
		108	#define fstat(fd,buf) _fstati64 (path,buf)
		109	#endif
		110	#define lstat(path,buf) stat (path,buf)
		111	#define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
		112	#define mkdir(path,mode) _mkdir (path)
		113	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
		114
		115	#define chmod(path,mode) _chmod (path, mode)
		116	#define fchmod(fd,mode) EIO_ENOSYS ()
		117	#define chown(path,uid,gid) EIO_ENOSYS ()
		118	#define fchown(fd,uid,gid) EIO_ENOSYS ()
		119	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
		120	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
		121	#define mknod(path,mode,dev) EIO_ENOSYS ()
		122	#define sync() EIO_ENOSYS ()
		123	#define readlink(path,buf,s) EIO_ENOSYS ()
		124	#define statvfs(path,buf) EIO_ENOSYS ()
		125	#define fstatvfs(fd,buf) EIO_ENOSYS ()
		126
		127	/* we could even stat and see if it exists */
		128	static int
		129	symlink (const char *old, const char *neu)
		130	{
		131	#if WINVER >= 0x0600
		132	if (CreateSymbolicLink (neu, old, 1))
		133	return 0;
		134
		135	if (CreateSymbolicLink (neu, old, 0))
		136	return 0;
		137	#endif
		138
		139	return EIO_ERRNO (ENOENT, -1);
		140	}
		141
		142	/* POSIX API only */
		143	#define CreateHardLink(neu,old) 0
		144	#define CreateSymbolicLink(neu,old,flags) 0
		145
		146	struct statvfs
		147	{
		148	int dummy;
		149	};
69		150
70	#else	151	#else
71		152
72	# include "config.h"
73	# include <sys/time.h>	153	#include <sys/time.h>
74	# include <sys/select.h>	154	#include <sys/select.h>
		155	#include <sys/statvfs.h>
75	# include <unistd.h>	156	#include <unistd.h>
76	# include <utime.h>	157	#include <utime.h>
77	# include <signal.h>	158	#include <signal.h>
78	# include <dirent.h>	159	#include <dirent.h>
79		160
		161	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		162	#include <sys/mman.h>
		163	#endif
		164
		165	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
		166	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
		167	#define _DIRENT_HAVE_D_TYPE /* sigh */
		168	#define D_INO(de) (de)->d_fileno
		169	#define D_NAMLEN(de) (de)->d_namlen
		170	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
		171	#define D_INO(de) (de)->d_ino
		172	#endif
		173
		174	#ifdef _D_EXACT_NAMLEN
		175	#undef D_NAMLEN
		176	#define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
		177	#endif
		178
		179	#ifdef _DIRENT_HAVE_D_TYPE
		180	#define D_TYPE(de) (de)->d_type
		181	#endif
		182
80	# ifndef EIO_STRUCT_DIRENT	183	#ifndef EIO_STRUCT_DIRENT
81	# define EIO_STRUCT_DIRENT struct dirent	184	#define EIO_STRUCT_DIRENT struct dirent
82	# endif	185	#endif
83		186
84	#endif	187	#endif
85		188
86	#if HAVE_SENDFILE	189	#if HAVE_SENDFILE
87	# if __linux	190	# if __linux
88	# include <sys/sendfile.h>	191	# include <sys/sendfile.h>
89	# elif __freebsd	192	# elif __FreeBSD__ || defined __APPLE__
90	# include <sys/socket.h>	193	# include <sys/socket.h>
91	# include <sys/uio.h>	194	# include <sys/uio.h>
92	# elif __hpux	195	# elif __hpux
93	# include <sys/socket.h>	196	# include <sys/socket.h>
94	# elif __solaris /* not yet */	197	# elif __solaris
95	# include <sys/sendfile.h>	198	# include <sys/sendfile.h>
96	# else	199	# else
97	# error sendfile support requested but not available	200	# error sendfile support requested but not available
98	# endif	201	# endif
99	#endif	202	#endif
100		203
101	/* number of seconds after which an idle threads exit */	204	#ifndef D_TYPE
102	#define IDLE_TIMEOUT 10	205	# define D_TYPE(de) 0
		206	#endif
		207	#ifndef D_INO
		208	# define D_INO(de) 0
		209	#endif
		210	#ifndef D_NAMLEN
		211	# define D_NAMLEN(de) strlen ((de)->d_name)
		212	#endif
103		213
104	/* used for struct dirent, AIX doesn't provide it */	214	/* used for struct dirent, AIX doesn't provide it */
105	#ifndef NAME_MAX	215	#ifndef NAME_MAX
106	# define NAME_MAX 4096	216	# define NAME_MAX 4096
		217	#endif
		218
		219	/* used for readlink etc. */
		220	#ifndef PATH_MAX
		221	# define PATH_MAX 4096
107	#endif	222	#endif
108		223
109	/* buffer size for various temporary buffers */	224	/* buffer size for various temporary buffers */
110	#define EIO_BUFSIZE 65536	225	#define EIO_BUFSIZE 65536
111		226
…		…
117	errno = ENOMEM; \	232	errno = ENOMEM; \
118	if (!eio_buf) \	233	if (!eio_buf) \
119	return -1;	234	return -1;
120		235
121	#define EIO_TICKS ((1000000 + 1023) >> 10)	236	#define EIO_TICKS ((1000000 + 1023) >> 10)
122
123	/*****************************************************************************/
124		237
125	#define ETP_PRI_MIN EIO_PRI_MIN	238	#define ETP_PRI_MIN EIO_PRI_MIN
126	#define ETP_PRI_MAX EIO_PRI_MAX	239	#define ETP_PRI_MAX EIO_PRI_MAX
127		240
128	struct etp_worker;	241	struct etp_worker;
…		…
144	if (wrk->dirp) \	257	if (wrk->dirp) \
145	{ \	258	{ \
146	closedir (wrk->dirp); \	259	closedir (wrk->dirp); \
147	wrk->dirp = 0; \	260	wrk->dirp = 0; \
148	}	261	}
		262
149	#define ETP_WORKER_COMMON \	263	#define ETP_WORKER_COMMON \
150	void *dbuf; \	264	void *dbuf; \
151	DIR *dirp;	265	DIR *dirp;
152		266
153	/*****************************************************************************/	267	/*****************************************************************************/
154		268
155	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)	269	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
156		270
157	/* calculcate time difference in ~1/EIO_TICKS of a second */	271	/* calculate time difference in ~1/EIO_TICKS of a second */
		272	ecb_inline int
158	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	273	tvdiff (struct timeval *tv1, struct timeval *tv2)
159	{	274	{
160	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	275	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
161	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);	276	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
162	}	277	}
163		278
…		…
170	static unsigned int max_poll_reqs; /* reslock */	285	static unsigned int max_poll_reqs; /* reslock */
171		286
172	static volatile unsigned int nreqs; /* reqlock */	287	static volatile unsigned int nreqs; /* reqlock */
173	static volatile unsigned int nready; /* reqlock */	288	static volatile unsigned int nready; /* reqlock */
174	static volatile unsigned int npending; /* reqlock */	289	static volatile unsigned int npending; /* reqlock */
175	static volatile unsigned int max_idle = 4;	290	static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
		291	static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
176		292
		293	static xmutex_t wrklock;
		294	static xmutex_t reslock;
		295	static xmutex_t reqlock;
		296	static xcond_t reqwait;
		297
		298	#if !HAVE_PREADWRITE
		299	/*
		300	* make our pread/pwrite emulation safe against themselves, but not against
		301	* normal read/write by using a mutex. slows down execution a lot,
		302	* but that's your problem, not mine.
		303	*/
177	static mutex_t wrklock = X_MUTEX_INIT;	304	static xmutex_t preadwritelock = X_MUTEX_INIT;
178	static mutex_t reslock = X_MUTEX_INIT;	305	#endif
179	static mutex_t reqlock = X_MUTEX_INIT;
180	static cond_t reqwait = X_COND_INIT;
181		306
182	typedef struct etp_worker	307	typedef struct etp_worker
183	{	308	{
184	/* locked by wrklock */	309	/* locked by wrklock */
185	struct etp_worker *prev, *next;	310	struct etp_worker *prev, *next;
186		311
187	thread_t tid;	312	xthread_t tid;
188		313
189	/* locked by reslock, reqlock or wrklock */	314	/* locked by reslock, reqlock or wrklock */
190	ETP_REQ *req; /* currently processed request */	315	ETP_REQ *req; /* currently processed request */
191		316
192	ETP_WORKER_COMMON	317	ETP_WORKER_COMMON
…		…
197	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)	322	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
198	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)	323	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
199		324
200	/* worker threads management */	325	/* worker threads management */
201		326
		327	static void ecb_cold
202	static void etp_worker_clear (etp_worker *wrk)	328	etp_worker_clear (etp_worker *wrk)
203	{	329	{
204	ETP_WORKER_CLEAR (wrk);	330	ETP_WORKER_CLEAR (wrk);
205	}	331	}
206		332
		333	static void ecb_cold
207	static void etp_worker_free (etp_worker *wrk)	334	etp_worker_free (etp_worker *wrk)
208	{	335	{
209	wrk->next->prev = wrk->prev;	336	wrk->next->prev = wrk->prev;
210	wrk->prev->next = wrk->next;	337	wrk->prev->next = wrk->next;
211		338
212	free (wrk);	339	free (wrk);
213	}	340	}
214		341
215	static unsigned int etp_nreqs (void)	342	static unsigned int
		343	etp_nreqs (void)
216	{	344	{
217	int retval;	345	int retval;
218	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	346	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
219	retval = nreqs;	347	retval = nreqs;
220	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	348	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
221	return retval;	349	return retval;
222	}	350	}
223		351
224	static unsigned int etp_nready (void)	352	static unsigned int
		353	etp_nready (void)
225	{	354	{
226	unsigned int retval;	355	unsigned int retval;
227		356
228	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	357	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
229	retval = nready;	358	retval = nready;
230	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	359	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
231		360
232	return retval;	361	return retval;
233	}	362	}
234		363
235	static unsigned int etp_npending (void)	364	static unsigned int
		365	etp_npending (void)
236	{	366	{
237	unsigned int retval;	367	unsigned int retval;
238		368
239	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	369	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
240	retval = npending;	370	retval = npending;
241	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	371	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
242		372
243	return retval;	373	return retval;
244	}	374	}
245		375
246	static unsigned int etp_nthreads (void)	376	static unsigned int
		377	etp_nthreads (void)
247	{	378	{
248	unsigned int retval;	379	unsigned int retval;
249		380
250	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	381	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
251	retval = started;	382	retval = started;
…		…
265	} etp_reqq;	396	} etp_reqq;
266		397
267	static etp_reqq req_queue;	398	static etp_reqq req_queue;
268	static etp_reqq res_queue;	399	static etp_reqq res_queue;
269		400
		401	static int ecb_noinline
270	static int reqq_push (etp_reqq *q, ETP_REQ *req)	402	reqq_push (etp_reqq *q, ETP_REQ *req)
271	{	403	{
272	int pri = req->pri;	404	int pri = req->pri;
273	req->next = 0;	405	req->next = 0;
274		406
275	if (q->qe[pri])	407	if (q->qe[pri])
…		…
281	q->qe[pri] = q->qs[pri] = req;	413	q->qe[pri] = q->qs[pri] = req;
282		414
283	return q->size++;	415	return q->size++;
284	}	416	}
285		417
		418	static ETP_REQ * ecb_noinline
286	static ETP_REQ *reqq_shift (etp_reqq *q)	419	reqq_shift (etp_reqq *q)
287	{	420	{
288	int pri;	421	int pri;
289		422
290	if (!q->size)	423	if (!q->size)
291	return 0;	424	return 0;
…		…
306	}	439	}
307		440
308	abort ();	441	abort ();
309	}	442	}
310		443
311	static void etp_atfork_prepare (void)	444	static void ecb_cold
		445	etp_thread_init (void)
312	{	446	{
313	X_LOCK (wrklock);
314	X_LOCK (reqlock);
315	X_LOCK (reslock);
316	#if !HAVE_PREADWRITE	447	#if !HAVE_PREADWRITE
317	X_LOCK (preadwritelock);	448	X_MUTEX_CREATE (preadwritelock);
318	#endif	449	#endif
		450	X_MUTEX_CREATE (wrklock);
		451	X_MUTEX_CREATE (reslock);
		452	X_MUTEX_CREATE (reqlock);
		453	X_COND_CREATE (reqwait);
319	}	454	}
320		455
		456	static void ecb_cold
		457	etp_atfork_prepare (void)
		458	{
		459	}
		460
		461	static void ecb_cold
321	static void etp_atfork_parent (void)	462	etp_atfork_parent (void)
322	{	463	{
323	#if !HAVE_PREADWRITE
324	X_UNLOCK (preadwritelock);
325	#endif
326	X_UNLOCK (reslock);
327	X_UNLOCK (reqlock);
328	X_UNLOCK (wrklock);
329	}	464	}
330		465
		466	static void ecb_cold
331	static void etp_atfork_child (void)	467	etp_atfork_child (void)
332	{	468	{
333	ETP_REQ *prv;	469	ETP_REQ *prv;
334		470
335	while (prv = reqq_shift (&req_queue))	471	while ((prv = reqq_shift (&req_queue)))
336	ETP_DESTROY (prv);	472	ETP_DESTROY (prv);
337		473
338	while (prv = reqq_shift (&res_queue))	474	while ((prv = reqq_shift (&res_queue)))
339	ETP_DESTROY (prv);	475	ETP_DESTROY (prv);
340		476
341	while (wrk_first.next != &wrk_first)	477	while (wrk_first.next != &wrk_first)
342	{	478	{
343	etp_worker *wrk = wrk_first.next;	479	etp_worker *wrk = wrk_first.next;
…		…
353	idle = 0;	489	idle = 0;
354	nreqs = 0;	490	nreqs = 0;
355	nready = 0;	491	nready = 0;
356	npending = 0;	492	npending = 0;
357		493
358	etp_atfork_parent ();	494	etp_thread_init ();
359	}	495	}
360		496
361	static void	497	static void ecb_cold
362	etp_once_init (void)	498	etp_once_init (void)
363	{	499	{
		500	etp_thread_init ();
364	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);	501	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
365	}	502	}
366		503
367	static int	504	static int ecb_cold
368	etp_init (void (*want_poll)(void), void (*done_poll)(void))	505	etp_init (void (*want_poll)(void), void (*done_poll)(void))
369	{	506	{
370	static pthread_once_t doinit = PTHREAD_ONCE_INIT;	507	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
371		508
372	pthread_once (&doinit, etp_once_init);	509	pthread_once (&doinit, etp_once_init);
…		…
377	return 0;	514	return 0;
378	}	515	}
379		516
380	X_THREAD_PROC (etp_proc);	517	X_THREAD_PROC (etp_proc);
381		518
		519	static void ecb_cold
382	static void etp_start_thread (void)	520	etp_start_thread (void)
383	{	521	{
384	etp_worker *wrk = calloc (1, sizeof (etp_worker));	522	etp_worker *wrk = calloc (1, sizeof (etp_worker));
385		523
386	/*TODO*/	524	/*TODO*/
387	assert (("unable to allocate worker thread data", wrk));	525	assert (("unable to allocate worker thread data", wrk));
…		…
400	free (wrk);	538	free (wrk);
401		539
402	X_UNLOCK (wrklock);	540	X_UNLOCK (wrklock);
403	}	541	}
404		542
		543	static void
405	static void etp_maybe_start_thread (void)	544	etp_maybe_start_thread (void)
406	{	545	{
407	if (etp_nthreads () >= wanted)	546	if (ecb_expect_true (etp_nthreads () >= wanted))
408	return;	547	return;
409		548
410	/* todo: maybe use idle here, but might be less exact */	549	/* todo: maybe use idle here, but might be less exact */
411	if (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ())	550	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
412	return;	551	return;
413		552
414	etp_start_thread ();	553	etp_start_thread ();
415	}	554	}
416		555
		556	static void ecb_cold
417	static void etp_end_thread (void)	557	etp_end_thread (void)
418	{	558	{
419	eio_req *req = calloc (1, sizeof (eio_req));	559	eio_req *req = calloc (1, sizeof (eio_req));
420		560
421	req->type = -1;	561	req->type = -1;
422	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;	562	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
…		…
429	X_LOCK (wrklock);	569	X_LOCK (wrklock);
430	--started;	570	--started;
431	X_UNLOCK (wrklock);	571	X_UNLOCK (wrklock);
432	}	572	}
433		573
434	static int etp_poll (void)	574	static int
		575	etp_poll (void)
435	{	576	{
436	unsigned int maxreqs;	577	unsigned int maxreqs;
437	unsigned int maxtime;	578	unsigned int maxtime;
438	struct timeval tv_start, tv_now;	579	struct timeval tv_start, tv_now;
439		580
…		…
469		610
470	X_LOCK (reqlock);	611	X_LOCK (reqlock);
471	--nreqs;	612	--nreqs;
472	X_UNLOCK (reqlock);	613	X_UNLOCK (reqlock);
473		614
474	if (req->type == EIO_GROUP && req->size)	615	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
475	{	616	{
476	req->int1 = 1; /* mark request as delayed */	617	req->int1 = 1; /* mark request as delayed */
477	continue;	618	continue;
478	}	619	}
479	else	620	else
480	{	621	{
481	int res = ETP_FINISH (req);	622	int res = ETP_FINISH (req);
482	if (res)	623	if (ecb_expect_false (res))
483	return res;	624	return res;
484	}	625	}
485		626
486	if (maxreqs && !--maxreqs)	627	if (ecb_expect_false (maxreqs && !--maxreqs))
487	break;	628	break;
488		629
489	if (maxtime)	630	if (maxtime)
490	{	631	{
491	gettimeofday (&tv_now, 0);	632	gettimeofday (&tv_now, 0);
…		…
497		638
498	errno = EAGAIN;	639	errno = EAGAIN;
499	return -1;	640	return -1;
500	}	641	}
501		642
		643	static void
502	static void etp_cancel (ETP_REQ *req)	644	etp_cancel (ETP_REQ *req)
503	{	645	{
504	X_LOCK (wrklock);	646	req->cancelled = 1;
505	req->flags |= EIO_FLAG_CANCELLED;
506	X_UNLOCK (wrklock);
507		647
508	eio_grp_cancel (req);	648	eio_grp_cancel (req);
509	}	649	}
510		650
		651	static void
511	static void etp_submit (ETP_REQ *req)	652	etp_submit (ETP_REQ *req)
512	{	653	{
513	req->pri -= ETP_PRI_MIN;	654	req->pri -= ETP_PRI_MIN;
514		655
515	if (req->pri < ETP_PRI_MIN - ETP_PRI_MIN) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;	656	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
516	if (req->pri > ETP_PRI_MAX - ETP_PRI_MIN) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;	657	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
517		658
		659	if (ecb_expect_false (req->type == EIO_GROUP))
		660	{
		661	/* I hope this is worth it :/ */
518	X_LOCK (reqlock);	662	X_LOCK (reqlock);
519	++nreqs;	663	++nreqs;
		664	X_UNLOCK (reqlock);
		665
		666	X_LOCK (reslock);
		667
		668	++npending;
		669
		670	if (!reqq_push (&res_queue, req) && want_poll_cb)
		671	want_poll_cb ();
		672
		673	X_UNLOCK (reslock);
		674	}
		675	else
		676	{
		677	X_LOCK (reqlock);
		678	++nreqs;
520	++nready;	679	++nready;
521	reqq_push (&req_queue, req);	680	reqq_push (&req_queue, req);
522	X_COND_SIGNAL (reqwait);	681	X_COND_SIGNAL (reqwait);
523	X_UNLOCK (reqlock);	682	X_UNLOCK (reqlock);
524		683
525	etp_maybe_start_thread ();	684	etp_maybe_start_thread ();
		685	}
526	}	686	}
527		687
		688	static void ecb_cold
528	static void etp_set_max_poll_time (double nseconds)	689	etp_set_max_poll_time (double nseconds)
529	{	690	{
530	if (WORDACCESS_UNSAFE) X_LOCK (reslock);	691	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
531	max_poll_time = nseconds;	692	max_poll_time = nseconds * EIO_TICKS;
532	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);	693	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
533	}	694	}
534		695
		696	static void ecb_cold
535	static void etp_set_max_poll_reqs (unsigned int maxreqs)	697	etp_set_max_poll_reqs (unsigned int maxreqs)
536	{	698	{
537	if (WORDACCESS_UNSAFE) X_LOCK (reslock);	699	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
538	max_poll_reqs = maxreqs;	700	max_poll_reqs = maxreqs;
539	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);	701	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
540	}	702	}
541		703
		704	static void ecb_cold
542	static void etp_set_max_idle (unsigned int nthreads)	705	etp_set_max_idle (unsigned int nthreads)
543	{	706	{
544	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	707	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
545	max_idle = nthreads <= 0 ? 1 : nthreads;	708	max_idle = nthreads;
546	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	709	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
547	}	710	}
548		711
		712	static void ecb_cold
		713	etp_set_idle_timeout (unsigned int seconds)
		714	{
		715	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		716	idle_timeout = seconds;
		717	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		718	}
		719
		720	static void ecb_cold
549	static void etp_set_min_parallel (unsigned int nthreads)	721	etp_set_min_parallel (unsigned int nthreads)
550	{	722	{
551	if (wanted < nthreads)	723	if (wanted < nthreads)
552	wanted = nthreads;	724	wanted = nthreads;
553	}	725	}
554		726
		727	static void ecb_cold
555	static void etp_set_max_parallel (unsigned int nthreads)	728	etp_set_max_parallel (unsigned int nthreads)
556	{	729	{
557	if (wanted > nthreads)	730	if (wanted > nthreads)
558	wanted = nthreads;	731	wanted = nthreads;
559		732
560	while (started > wanted)	733	while (started > wanted)
561	etp_end_thread ();	734	etp_end_thread ();
562	}	735	}
563		736
564	/*****************************************************************************/	737	/*****************************************************************************/
565		738
		739	static void
566	static void grp_try_feed (eio_req *grp)	740	grp_try_feed (eio_req *grp)
567	{	741	{
568	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	742	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
569	{	743	{
570	int old_len = grp->size;	744	grp->flags &= ~EIO_FLAG_GROUPADD;
571		745
572	EIO_FEED (grp);	746	EIO_FEED (grp);
573		747
574	/* stop if no progress has been made */	748	/* stop if no progress has been made */
575	if (old_len == grp->size)	749	if (!(grp->flags & EIO_FLAG_GROUPADD))
576	{	750	{
577	grp->feed = 0;	751	grp->feed = 0;
578	break;	752	break;
579	}	753	}
580	}	754	}
581	}	755	}
582		756
		757	static int
583	static int grp_dec (eio_req *grp)	758	grp_dec (eio_req *grp)
584	{	759	{
585	--grp->size;	760	--grp->size;
586		761
587	/* call feeder, if applicable */	762	/* call feeder, if applicable */
588	grp_try_feed (grp);	763	grp_try_feed (grp);
…		…
592	return eio_finish (grp);	767	return eio_finish (grp);
593	else	768	else
594	return 0;	769	return 0;
595	}	770	}
596		771
		772	static void
597	void eio_destroy (eio_req *req)	773	eio_destroy (eio_req *req)
598	{	774	{
599	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);	775	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
600	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);	776	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
601		777
602	EIO_DESTROY (req);	778	EIO_DESTROY (req);
603	}	779	}
604		780
		781	static int
605	static int eio_finish (eio_req *req)	782	eio_finish (eio_req *req)
606	{	783	{
607	int res = EIO_FINISH (req);	784	int res = EIO_FINISH (req);
608		785
609	if (req->grp)	786	if (req->grp)
610	{	787	{
…		…
618	if (grp->grp_first == req)	795	if (grp->grp_first == req)
619	grp->grp_first = req->grp_next;	796	grp->grp_first = req->grp_next;
620		797
621	res2 = grp_dec (grp);	798	res2 = grp_dec (grp);
622		799
623	if (!res && res2)	800	if (!res)
624	res = res2;	801	res = res2;
625	}	802	}
626		803
627	eio_destroy (req);	804	eio_destroy (req);
628		805
629	return res;	806	return res;
630	}	807	}
631		808
		809	void
632	void eio_grp_cancel (eio_req *grp)	810	eio_grp_cancel (eio_req *grp)
633	{	811	{
634	for (grp = grp->grp_first; grp; grp = grp->grp_next)	812	for (grp = grp->grp_first; grp; grp = grp->grp_next)
635	eio_cancel (grp);	813	eio_cancel (grp);
636	}	814	}
637		815
		816	void
638	void eio_cancel (eio_req *req)	817	eio_cancel (eio_req *req)
639	{	818	{
640	etp_cancel (req);	819	etp_cancel (req);
641	}	820	}
642		821
		822	void
643	void eio_submit (eio_req *req)	823	eio_submit (eio_req *req)
644	{	824	{
645	etp_submit (req);	825	etp_submit (req);
646	}	826	}
647		827
648	unsigned int eio_nreqs (void)	828	unsigned int
		829	eio_nreqs (void)
649	{	830	{
650	return etp_nreqs ();	831	return etp_nreqs ();
651	}	832	}
652		833
653	unsigned int eio_nready (void)	834	unsigned int
		835	eio_nready (void)
654	{	836	{
655	return etp_nready ();	837	return etp_nready ();
656	}	838	}
657		839
658	unsigned int eio_npending (void)	840	unsigned int
		841	eio_npending (void)
659	{	842	{
660	return etp_npending ();	843	return etp_npending ();
661	}	844	}
662		845
663	unsigned int eio_nthreads (void)	846	unsigned int ecb_cold
		847	eio_nthreads (void)
664	{	848	{
665	return etp_nthreads ();	849	return etp_nthreads ();
666	}	850	}
667		851
		852	void ecb_cold
668	void eio_set_max_poll_time (double nseconds)	853	eio_set_max_poll_time (double nseconds)
669	{	854	{
670	etp_set_max_poll_time (nseconds);	855	etp_set_max_poll_time (nseconds);
671	}	856	}
672		857
		858	void ecb_cold
673	void eio_set_max_poll_reqs (unsigned int maxreqs)	859	eio_set_max_poll_reqs (unsigned int maxreqs)
674	{	860	{
675	etp_set_max_poll_reqs (maxreqs);	861	etp_set_max_poll_reqs (maxreqs);
676	}	862	}
677		863
		864	void ecb_cold
678	void eio_set_max_idle (unsigned int nthreads)	865	eio_set_max_idle (unsigned int nthreads)
679	{	866	{
680	etp_set_max_idle (nthreads);	867	etp_set_max_idle (nthreads);
681	}	868	}
682		869
		870	void ecb_cold
		871	eio_set_idle_timeout (unsigned int seconds)
		872	{
		873	etp_set_idle_timeout (seconds);
		874	}
		875
		876	void ecb_cold
683	void eio_set_min_parallel (unsigned int nthreads)	877	eio_set_min_parallel (unsigned int nthreads)
684	{	878	{
685	etp_set_min_parallel (nthreads);	879	etp_set_min_parallel (nthreads);
686	}	880	}
687		881
		882	void ecb_cold
688	void eio_set_max_parallel (unsigned int nthreads)	883	eio_set_max_parallel (unsigned int nthreads)
689	{	884	{
690	etp_set_max_parallel (nthreads);	885	etp_set_max_parallel (nthreads);
691	}	886	}
692		887
693	int eio_poll (void)	888	int eio_poll (void)
…		…
697		892
698	/*****************************************************************************/	893	/*****************************************************************************/
699	/* work around various missing functions */	894	/* work around various missing functions */
700		895
701	#if !HAVE_PREADWRITE	896	#if !HAVE_PREADWRITE
		897	# undef pread
		898	# undef pwrite
702	# define pread eio__pread	899	# define pread eio__pread
703	# define pwrite eio__pwrite	900	# define pwrite eio__pwrite
704		901
705	/*
706	* make our pread/pwrite safe against themselves, but not against
707	* normal read/write by using a mutex. slows down execution a lot,
708	* but that's your problem, not mine.
709	*/
710	static mutex_t preadwritelock = X_MUTEX_INIT;
711
712	static ssize_t	902	static eio_ssize_t
713	eio__pread (int fd, void *buf, size_t count, off_t offset)	903	eio__pread (int fd, void *buf, size_t count, off_t offset)
714	{	904	{
715	ssize_t res;	905	eio_ssize_t res;
716	off_t ooffset;	906	off_t ooffset;
717		907
718	X_LOCK (preadwritelock);	908	X_LOCK (preadwritelock);
719	ooffset = lseek (fd, 0, SEEK_CUR);	909	ooffset = lseek (fd, 0, SEEK_CUR);
720	lseek (fd, offset, SEEK_SET);	910	lseek (fd, offset, SEEK_SET);
…		…
723	X_UNLOCK (preadwritelock);	913	X_UNLOCK (preadwritelock);
724		914
725	return res;	915	return res;
726	}	916	}
727		917
728	static ssize_t	918	static eio_ssize_t
729	eio__pwrite (int fd, void *buf, size_t count, off_t offset)	919	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
730	{	920	{
731	ssize_t res;	921	eio_ssize_t res;
732	off_t ooffset;	922	off_t ooffset;
733		923
734	X_LOCK (preadwritelock);	924	X_LOCK (preadwritelock);
735	ooffset = lseek (fd, 0, SEEK_CUR);	925	ooffset = lseek (fd, 0, SEEK_CUR);
736	lseek (fd, offset, SEEK_SET);	926	lseek (fd, offset, SEEK_SET);
737	res = write (fd, buf, count);	927	res = write (fd, buf, count);
738	lseek (fd, offset, SEEK_SET);	928	lseek (fd, ooffset, SEEK_SET);
739	X_UNLOCK (preadwritelock);	929	X_UNLOCK (preadwritelock);
740		930
741	return res;	931	return res;
742	}	932	}
743	#endif	933	#endif
744		934
745	#ifndef HAVE_FUTIMES	935	#ifndef HAVE_UTIMES
746		936
		937	# undef utimes
747	# define utimes(path,times) eio__utimes (path, times)	938	# define utimes(path,times) eio__utimes (path, times)
748	# define futimes(fd,times) eio__futimes (fd, times)
749		939
750	static int	940	static int
751	eio__utimes (const char *filename, const struct timeval times[2])	941	eio__utimes (const char *filename, const struct timeval times[2])
752	{	942	{
753	if (times)	943	if (times)
…		…
761	}	951	}
762	else	952	else
763	return utime (filename, 0);	953	return utime (filename, 0);
764	}	954	}
765		955
		956	#endif
		957
		958	#ifndef HAVE_FUTIMES
		959
		960	# undef futimes
		961	# define futimes(fd,times) eio__futimes (fd, times)
		962
		963	static int
766	static int eio__futimes (int fd, const struct timeval tv[2])	964	eio__futimes (int fd, const struct timeval tv[2])
767	{	965	{
768	errno = ENOSYS;	966	errno = ENOSYS;
769	return -1;	967	return -1;
770	}	968	}
771		969
772	#endif	970	#endif
773		971
774	#if !HAVE_FDATASYNC	972	#if !HAVE_FDATASYNC
		973	# undef fdatasync
775	# define fdatasync fsync	974	# define fdatasync(fd) fsync (fd)
776	#endif	975	#endif
		976
		977	/* sync_file_range always needs emulation */
		978	static int
		979	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
		980	{
		981	#if HAVE_SYNC_FILE_RANGE
		982	int res;
		983
		984	if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
		985	|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
		986	|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
		987	{
		988	flags = 0
		989	| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
		990	| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
		991	| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
		992	}
		993
		994	res = sync_file_range (fd, offset, nbytes, flags);
		995
		996	if (!res || errno != ENOSYS)
		997	return res;
		998	#endif
		999
		1000	/* even though we could play tricks with the flags, it's better to always
		1001	* call fdatasync, as that matches the expectation of its users best */
		1002	return fdatasync (fd);
		1003	}
		1004
		1005	static int
		1006	eio__fallocate (int fd, int mode, off_t offset, size_t len)
		1007	{
		1008	#if HAVE_FALLOCATE
		1009	return fallocate (fd, mode, offset, len);
		1010	#else
		1011	errno = ENOSYS;
		1012	return -1;
		1013	#endif
		1014	}
777		1015
778	#if !HAVE_READAHEAD	1016	#if !HAVE_READAHEAD
		1017	# undef readahead
779	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)	1018	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
780		1019
781	static ssize_t	1020	static eio_ssize_t
782	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)	1021	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
783	{	1022	{
784	size_t todo = count;	1023	size_t todo = count;
785	dBUF;	1024	dBUF;
786		1025
…		…
798	}	1037	}
799		1038
800	#endif	1039	#endif
801		1040
802	/* sendfile always needs emulation */	1041	/* sendfile always needs emulation */
803	static ssize_t	1042	static eio_ssize_t
804	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)	1043	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
805	{	1044	{
		1045	eio_ssize_t written = 0;
806	ssize_t res;	1046	eio_ssize_t res;
807		1047
808	if (!count)	1048	if (!count)
809	return 0;	1049	return 0;
810		1050
		1051	for (;;)
		1052	{
		1053	#ifdef __APPLE__
		1054	# undef HAVE_SENDFILE /* broken, as everything on os x */
		1055	#endif
811	#if HAVE_SENDFILE	1056	#if HAVE_SENDFILE
812	# if __linux	1057	# if __linux
		1058	off_t soffset = offset;
813	res = sendfile (ofd, ifd, &offset, count);	1059	res = sendfile (ofd, ifd, &soffset, count);
814		1060
815	# elif __freebsd	1061	# elif __FreeBSD__
816	/*	1062	/*
817	* Of course, the freebsd sendfile is a dire hack with no thoughts	1063	* Of course, the freebsd sendfile is a dire hack with no thoughts
818	* wasted on making it similar to other I/O functions.	1064	* wasted on making it similar to other I/O functions.
819	*/	1065	*/
820	{
821	off_t sbytes;	1066	off_t sbytes;
822	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	1067	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
823		1068
824	if (res < 0 && sbytes)	1069	#if 0 /* according to the manpage, this is correct, but broken behaviour */
825	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */	1070	/* freebsd' sendfile will return 0 on success */
		1071	/* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
		1072	/* not on e.g. EIO or EPIPE - sounds broken */
		1073	if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
826	res = sbytes;	1074	res = sbytes;
827	}	1075	#endif
		1076
		1077	/* according to source inspection, this is correct, and useful behaviour */
		1078	if (sbytes)
		1079	res = sbytes;
		1080
		1081	# elif defined (__APPLE__)
		1082	off_t sbytes = count;
		1083	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
		1084
		1085	/* according to the manpage, sbytes is always valid */
		1086	if (sbytes)
		1087	res = sbytes;
828		1088
829	# elif __hpux	1089	# elif __hpux
830	res = sendfile (ofd, ifd, offset, count, 0, 0);	1090	res = sendfile (ofd, ifd, offset, count, 0, 0);
831		1091
832	# elif __solaris	1092	# elif __solaris
833	{
834	struct sendfilevec vec;	1093	struct sendfilevec vec;
835	size_t sbytes;	1094	size_t sbytes;
836		1095
837	vec.sfv_fd = ifd;	1096	vec.sfv_fd = ifd;
838	vec.sfv_flag = 0;	1097	vec.sfv_flag = 0;
839	vec.sfv_off = offset;	1098	vec.sfv_off = offset;
840	vec.sfv_len = count;	1099	vec.sfv_len = count;
841		1100
842	res = sendfilev (ofd, &vec, 1, &sbytes);	1101	res = sendfilev (ofd, &vec, 1, &sbytes);
843		1102
844	if (res < 0 && sbytes)	1103	if (res < 0 && sbytes)
845	res = sbytes;	1104	res = sbytes;
846	}
847		1105
848	# endif	1106	# endif
		1107
		1108	#elif defined (_WIN32) && 0
		1109	/* does not work, just for documentation of what would need to be done */
		1110	/* actually, cannot be done like this, as TransmitFile changes the file offset, */
		1111	/* libeio guarantees that the file offset does not change, and windows */
		1112	/* has no way to get an independent handle to the same file description */
		1113	HANDLE h = TO_SOCKET (ifd);
		1114	SetFilePointer (h, offset, 0, FILE_BEGIN);
		1115	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
		1116
849	#else	1117	#else
850	res = -1;	1118	res = -1;
851	errno = ENOSYS;	1119	errno = ENOSYS;
852	#endif	1120	#endif
853		1121
		1122	/* we assume sendfile can copy at least 128mb in one go */
		1123	if (res <= 128 * 1024 * 1024)
		1124	{
		1125	if (res > 0)
		1126	written += res;
		1127
		1128	if (written)
		1129	return written;
		1130
		1131	break;
		1132	}
		1133	else
		1134	{
		1135	/* if we requested more, then probably the kernel was lazy */
		1136	written += res;
		1137	offset += res;
		1138	count -= res;
		1139
		1140	if (!count)
		1141	return written;
		1142	}
		1143	}
		1144
854	if (res < 0	1145	if (res < 0
855	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	1146	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		1147	/* BSDs */
		1148	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
		1149	|| errno == ENOTSUP
		1150	#endif
		1151	#ifdef EOPNOTSUPP /* windows */
		1152	|| errno == EOPNOTSUPP /* BSDs */
		1153	#endif
856	#if __solaris	1154	#if __solaris
857	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	1155	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
858	#endif	1156	#endif
859	)	1157	)
860	)	1158	)
…		…
864		1162
865	res = 0;	1163	res = 0;
866		1164
867	while (count)	1165	while (count)
868	{	1166	{
869	ssize_t cnt;	1167	eio_ssize_t cnt;
870		1168
871	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);	1169	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);
872		1170
873	if (cnt <= 0)	1171	if (cnt <= 0)
874	{	1172	{
…		…
891	}	1189	}
892		1190
893	return res;	1191	return res;
894	}	1192	}
895		1193
		1194	#ifdef PAGESIZE
		1195	# define eio_pagesize() PAGESIZE
		1196	#else
		1197	static intptr_t
		1198	eio_pagesize (void)
		1199	{
		1200	static intptr_t page;
		1201
		1202	if (!page)
		1203	page = sysconf (_SC_PAGESIZE);
		1204
		1205	return page;
		1206	}
		1207	#endif
		1208
		1209	static void
		1210	eio_page_align (void **addr, size_t *length)
		1211	{
		1212	intptr_t mask = eio_pagesize () - 1;
		1213
		1214	/* round down addr */
		1215	intptr_t adj = mask & (intptr_t)*addr;
		1216
		1217	*addr = (void *)((intptr_t)*addr - adj);
		1218	*length += adj;
		1219
		1220	/* round up length */
		1221	*length = (*length + mask) & ~mask;
		1222	}
		1223
		1224	#if !_POSIX_MEMLOCK
		1225	# define eio__mlockall(a) EIO_ENOSYS ()
		1226	#else
		1227
		1228	static int
		1229	eio__mlockall (int flags)
		1230	{
		1231	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1232	extern int mallopt (int, int);
		1233	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1234	#endif
		1235
		1236	if (EIO_MCL_CURRENT != MCL_CURRENT
		1237	|| EIO_MCL_FUTURE != MCL_FUTURE)
		1238	{
		1239	flags = 0
		1240	| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
		1241	| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
		1242	}
		1243
		1244	return mlockall (flags);
		1245	}
		1246	#endif
		1247
		1248	#if !_POSIX_MEMLOCK_RANGE
		1249	# define eio__mlock(a,b) EIO_ENOSYS ()
		1250	#else
		1251
		1252	static int
		1253	eio__mlock (void *addr, size_t length)
		1254	{
		1255	eio_page_align (&addr, &length);
		1256
		1257	return mlock (addr, length);
		1258	}
		1259
		1260	#endif
		1261
		1262	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1263	# define eio__msync(a,b,c) EIO_ENOSYS ()
		1264	#else
		1265
		1266	static int
		1267	eio__msync (void *mem, size_t len, int flags)
		1268	{
		1269	eio_page_align (&mem, &len);
		1270
		1271	if (EIO_MS_ASYNC != MS_SYNC
		1272	|| EIO_MS_INVALIDATE != MS_INVALIDATE
		1273	|| EIO_MS_SYNC != MS_SYNC)
		1274	{
		1275	flags = 0
		1276	| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
		1277	| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
		1278	| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
		1279	}
		1280
		1281	return msync (mem, len, flags);
		1282	}
		1283
		1284	#endif
		1285
		1286	static int
		1287	eio__mtouch (eio_req *req)
		1288	{
		1289	void *mem = req->ptr2;
		1290	size_t len = req->size;
		1291	int flags = req->int1;
		1292
		1293	eio_page_align (&mem, &len);
		1294
		1295	{
		1296	intptr_t addr = (intptr_t)mem;
		1297	intptr_t end = addr + len;
		1298	intptr_t page = eio_pagesize ();
		1299
		1300	if (addr < end)
		1301	if (flags & EIO_MT_MODIFY) /* modify */
		1302	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1303	else
		1304	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1305	}
		1306
		1307	return 0;
		1308	}
		1309
		1310	/*****************************************************************************/
		1311	/* requests implemented outside eio_execute, because they are so large */
		1312
		1313	static void
		1314	eio__realpath (eio_req *req, etp_worker *self)
		1315	{
		1316	char *rel = req->ptr1;
		1317	char *res;
		1318	char *tmp1, *tmp2;
		1319	#if SYMLOOP_MAX > 32
		1320	int symlinks = SYMLOOP_MAX;
		1321	#else
		1322	int symlinks = 32;
		1323	#endif
		1324
		1325	req->result = -1;
		1326
		1327	errno = EINVAL;
		1328	if (!rel)
		1329	return;
		1330
		1331	errno = ENOENT;
		1332	if (!*rel)
		1333	return;
		1334
		1335	if (!req->ptr2)
		1336	{
		1337	X_LOCK (wrklock);
		1338	req->flags |= EIO_FLAG_PTR2_FREE;
		1339	X_UNLOCK (wrklock);
		1340	req->ptr2 = malloc (PATH_MAX * 3);
		1341
		1342	errno = ENOMEM;
		1343	if (!req->ptr2)
		1344	return;
		1345	}
		1346
		1347	res = req->ptr2;
		1348	tmp1 = res + PATH_MAX;
		1349	tmp2 = tmp1 + PATH_MAX;
		1350
		1351	#if 0 /* disabled, the musl way to do things is just too racy */
		1352	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
		1353	/* on linux we may be able to ask the kernel */
		1354	{
		1355	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
		1356
		1357	if (fd >= 0)
		1358	{
		1359	sprintf (tmp1, "/proc/self/fd/%d", fd);
		1360	req->result = readlink (tmp1, res, PATH_MAX);
		1361	close (fd);
		1362
		1363	/* here we should probably stat the open file and the disk file, to make sure they still match */
		1364
		1365	if (req->result > 0)
		1366	goto done;
		1367	}
		1368	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
		1369	return;
		1370	}
		1371	#endif
		1372	#endif
		1373
		1374	if (*rel != '/')
		1375	{
		1376	if (!getcwd (res, PATH_MAX))
		1377	return;
		1378
		1379	if (res [1]) /* only use if not / */
		1380	res += strlen (res);
		1381	}
		1382
		1383	while (*rel)
		1384	{
		1385	eio_ssize_t len, linklen;
		1386	char *beg = rel;
		1387
		1388	while (*rel && *rel != '/')
		1389	++rel;
		1390
		1391	len = rel - beg;
		1392
		1393	if (!len) /* skip slashes */
		1394	{
		1395	++rel;
		1396	continue;
		1397	}
		1398
		1399	if (beg [0] == '.')
		1400	{
		1401	if (len == 1)
		1402	continue; /* . - nop */
		1403
		1404	if (beg [1] == '.' && len == 2)
		1405	{
		1406	/* .. - back up one component, if possible */
		1407
		1408	while (res != req->ptr2)
		1409	if (*--res == '/')
		1410	break;
		1411
		1412	continue;
		1413	}
		1414	}
		1415
		1416	errno = ENAMETOOLONG;
		1417	if (res + 1 + len + 1 >= tmp1)
		1418	return;
		1419
		1420	/* copy one component */
		1421	*res = '/';
		1422	memcpy (res + 1, beg, len);
		1423
		1424	/* zero-terminate, for readlink */
		1425	res [len + 1] = 0;
		1426
		1427	/* now check if it's a symlink */
		1428	linklen = readlink (req->ptr2, tmp1, PATH_MAX);
		1429
		1430	if (linklen < 0)
		1431	{
		1432	if (errno != EINVAL)
		1433	return;
		1434
		1435	/* it's a normal directory. hopefully */
		1436	res += len + 1;
		1437	}
		1438	else
		1439	{
		1440	/* yay, it was a symlink - build new path in tmp2 */
		1441	int rellen = strlen (rel);
		1442
		1443	errno = ENAMETOOLONG;
		1444	if (linklen + 1 + rellen >= PATH_MAX)
		1445	return;
		1446
		1447	errno = ELOOP;
		1448	if (!--symlinks)
		1449	return;
		1450
		1451	if (*tmp1 == '/')
		1452	res = req->ptr2; /* symlink resolves to an absolute path */
		1453
		1454	/* we need to be careful, as rel might point into tmp2 already */
		1455	memmove (tmp2 + linklen + 1, rel, rellen + 1);
		1456	tmp2 [linklen] = '/';
		1457	memcpy (tmp2, tmp1, linklen);
		1458
		1459	rel = tmp2;
		1460	}
		1461	}
		1462
		1463	/* special case for the lone root path */
		1464	if (res == req->ptr2)
		1465	*res++ = '/';
		1466
		1467	req->result = res - (char *)req->ptr2;
		1468
		1469	done:
		1470	req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */
		1471	}
		1472
		1473	static signed char
		1474	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
		1475	{
		1476	return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
		1477	: a->inode < b->inode ? -1
		1478	: a->inode > b->inode ? 1
		1479	: 0;
		1480	}
		1481
		1482	#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
		1483
		1484	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
		1485	#define EIO_SORT_FAST 60 /* when to only use insertion sort */
		1486
		1487	static void
		1488	eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
		1489	{
		1490	unsigned char bits [9 + sizeof (ino_t) * 8];
		1491	unsigned char *bit = bits;
		1492
		1493	assert (CHAR_BIT == 8);
		1494	assert (sizeof (eio_dirent) * 8 < 256);
		1495	assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
		1496	assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */
		1497
		1498	if (size <= EIO_SORT_FAST)
		1499	return;
		1500
		1501	/* first prepare an array of bits to test in our radix sort */
		1502	/* try to take endianness into account, as well as differences in ino_t sizes */
		1503	/* inode_bits must contain all inodes ORed together */
		1504	/* which is used to skip bits that are 0 everywhere, which is very common */
		1505	{
		1506	ino_t endianness;
		1507	int i, j;
		1508
		1509	/* we store the byte offset of byte n into byte n of "endianness" */
		1510	for (i = 0; i < sizeof (ino_t); ++i)
		1511	((unsigned char *)&endianness)[i] = i;
		1512
		1513	*bit++ = 0;
		1514
		1515	for (i = 0; i < sizeof (ino_t); ++i)
		1516	{
		1517	/* shifting off the byte offsets out of "endianness" */
		1518	int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
		1519	endianness >>= 8;
		1520
		1521	for (j = 0; j < 8; ++j)
		1522	if (inode_bits & (((ino_t)1) << (i * 8 + j)))
		1523	*bit++ = offs + j;
		1524	}
		1525
		1526	for (j = 0; j < 8; ++j)
		1527	if (score_bits & (1 << j))
		1528	*bit++ = offsetof (eio_dirent, score) * 8 + j;
		1529	}
		1530
		1531	/* now actually do the sorting (a variant of MSD radix sort) */
		1532	{
		1533	eio_dirent *base_stk [9 + sizeof (ino_t) * 8], *base;
		1534	eio_dirent *end_stk [9 + sizeof (ino_t) * 8], *end;
		1535	unsigned char *bit_stk [9 + sizeof (ino_t) * 8];
		1536	int stk_idx = 0;
		1537
		1538	base_stk [stk_idx] = dents;
		1539	end_stk [stk_idx] = dents + size;
		1540	bit_stk [stk_idx] = bit - 1;
		1541
		1542	do
		1543	{
		1544	base = base_stk [stk_idx];
		1545	end = end_stk [stk_idx];
		1546	bit = bit_stk [stk_idx];
		1547
		1548	for (;;)
		1549	{
		1550	unsigned char O = *bit >> 3;
		1551	unsigned char M = 1 << (*bit & 7);
		1552
		1553	eio_dirent *a = base;
		1554	eio_dirent *b = end;
		1555
		1556	if (b - a < EIO_SORT_CUTOFF)
		1557	break;
		1558
		1559	/* now bit-partition the array on the bit */
		1560	/* this ugly asymmetric loop seems to perform much better than typical */
		1561	/* partition algos found in the literature */
		1562	do
		1563	if (!(((unsigned char *)a)[O] & M))
		1564	++a;
		1565	else if (!(((unsigned char *)--b)[O] & M))
		1566	{
		1567	eio_dirent tmp = *a; *a = *b; *b = tmp;
		1568	++a;
		1569	}
		1570	while (b > a);
		1571
		1572	/* next bit, or stop, if no bits left in this path */
		1573	if (!*--bit)
		1574	break;
		1575
		1576	base_stk [stk_idx] = a;
		1577	end_stk [stk_idx] = end;
		1578	bit_stk [stk_idx] = bit;
		1579	++stk_idx;
		1580
		1581	end = a;
		1582	}
		1583	}
		1584	while (stk_idx--);
		1585	}
		1586	}
		1587
		1588	static void
		1589	eio_dent_insertion_sort (eio_dirent *dents, int size)
		1590	{
		1591	/* first move the smallest element to the front, to act as a sentinel */
		1592	{
		1593	int i;
		1594	eio_dirent *min = dents;
		1595
		1596	/* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
		1597	for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
		1598	if (EIO_DENT_CMP (dents [i], <, *min))
		1599	min = &dents [i];
		1600
		1601	/* swap elements 0 and j (minimum) */
		1602	{
		1603	eio_dirent tmp = *dents; *dents = *min; *min = tmp;
		1604	}
		1605	}
		1606
		1607	/* then do standard insertion sort, assuming that all elements are >= dents [0] */
		1608	{
		1609	eio_dirent *i, *j;
		1610
		1611	for (i = dents + 1; i < dents + size; ++i)
		1612	{
		1613	eio_dirent value = *i;
		1614
		1615	for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
		1616	j [1] = j [0];
		1617
		1618	j [1] = value;
		1619	}
		1620	}
		1621	}
		1622
		1623	static void
		1624	eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
		1625	{
		1626	if (size <= 1)
		1627	return; /* our insertion sort relies on size > 0 */
		1628
		1629	/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
		1630	/* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
		1631	eio_dent_radix_sort (dents, size, score_bits, inode_bits);
		1632
		1633	/* use an insertion sort at the end, or for small arrays, */
		1634	/* as insertion sort is more efficient for small partitions */
		1635	eio_dent_insertion_sort (dents, size);
		1636	}
		1637
896	/* read a full directory */	1638	/* read a full directory */
897	static void	1639	static void
898	eio__scandir (eio_req *req, etp_worker *self)	1640	eio__scandir (eio_req *req, etp_worker *self)
899	{	1641	{
900	DIR *dirp;	1642	DIR *dirp;
901	EIO_STRUCT_DIRENT *entp;	1643	EIO_STRUCT_DIRENT *entp;
902	char *name, *names;	1644	char *name, *names;
903	int memlen = 4096;	1645	int namesalloc = 4096;
904	int memofs = 0;	1646	int namesoffs = 0;
		1647	int flags = req->int1;
		1648	eio_dirent *dents = 0;
		1649	int dentalloc = 128;
905	int res = 0;	1650	int dentoffs = 0;
		1651	ino_t inode_bits = 0;
		1652
		1653	req->result = -1;
		1654
		1655	if (!(flags & EIO_READDIR_DENTS))
		1656	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
906		1657
907	X_LOCK (wrklock);	1658	X_LOCK (wrklock);
		1659	/* the corresponding closedir is in ETP_WORKER_CLEAR */
908	self->dirp = dirp = opendir (req->ptr1);	1660	self->dirp = dirp = opendir (req->ptr1);
		1661
909	req->flags |= EIO_FLAG_PTR2_FREE;	1662	if (req->flags & EIO_FLAG_PTR1_FREE)
		1663	free (req->ptr1);
		1664
		1665	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
		1666	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
910	req->ptr2 = names = malloc (memlen);	1667	req->ptr2 = names = malloc (namesalloc);
911	X_UNLOCK (wrklock);	1668	X_UNLOCK (wrklock);
912		1669
913	if (dirp && names)	1670	if (dirp && names && (!flags || dents))
914	for (;;)	1671	for (;;)
915	{	1672	{
916	errno = 0;	1673	errno = 0;
917	entp = readdir (dirp);	1674	entp = readdir (dirp);
918		1675
919	if (!entp)	1676	if (!entp)
		1677	{
		1678	if (errno)
		1679	break;
		1680
		1681	/* sort etc. */
		1682	req->int1 = flags;
		1683	req->result = dentoffs;
		1684
		1685	if (flags & EIO_READDIR_STAT_ORDER)
		1686	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
		1687	else if (flags & EIO_READDIR_DIRS_FIRST)
		1688	if (flags & EIO_READDIR_FOUND_UNKNOWN)
		1689	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
		1690	else
		1691	{
		1692	/* in this case, all is known, and we just put dirs first and sort them */
		1693	eio_dirent *oth = dents + dentoffs;
		1694	eio_dirent *dir = dents;
		1695
		1696	/* now partition dirs to the front, and non-dirs to the back */
		1697	/* by walking from both sides and swapping if necessary */
		1698	while (oth > dir)
		1699	{
		1700	if (dir->type == EIO_DT_DIR)
		1701	++dir;
		1702	else if ((--oth)->type == EIO_DT_DIR)
		1703	{
		1704	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
		1705
		1706	++dir;
		1707	}
		1708	}
		1709
		1710	/* now sort the dirs only (dirs all have the same score) */
		1711	eio_dent_sort (dents, dir - dents, 0, inode_bits);
		1712	}
		1713
920	break;	1714	break;
		1715	}
921		1716
		1717	/* now add the entry to our list(s) */
922	name = entp->d_name;	1718	name = entp->d_name;
923		1719
		1720	/* skip . and .. entries */
924	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1721	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
925	{	1722	{
926	int len = strlen (name) + 1;	1723	int len = D_NAMLEN (entp) + 1;
927		1724
928	res++;	1725	while (ecb_expect_false (namesoffs + len > namesalloc))
929
930	while (memofs + len > memlen)
931	{	1726	{
932	memlen *= 2;	1727	namesalloc *= 2;
933	X_LOCK (wrklock);	1728	X_LOCK (wrklock);
934	req->ptr2 = names = realloc (names, memlen);	1729	req->ptr2 = names = realloc (names, namesalloc);
935	X_UNLOCK (wrklock);	1730	X_UNLOCK (wrklock);
936		1731
937	if (!names)	1732	if (!names)
938	break;	1733	break;
939	}	1734	}
940		1735
941	memcpy (names + memofs, name, len);	1736	memcpy (names + namesoffs, name, len);
		1737
		1738	if (dents)
		1739	{
		1740	struct eio_dirent *ent;
		1741
		1742	if (ecb_expect_false (dentoffs == dentalloc))
		1743	{
		1744	dentalloc *= 2;
		1745	X_LOCK (wrklock);
		1746	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
		1747	X_UNLOCK (wrklock);
		1748
		1749	if (!dents)
		1750	break;
		1751	}
		1752
		1753	ent = dents + dentoffs;
		1754
		1755	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
		1756	ent->namelen = len - 1;
		1757	ent->inode = D_INO (entp);
		1758
		1759	inode_bits |= ent->inode;
		1760
		1761	switch (D_TYPE (entp))
		1762	{
		1763	default:
		1764	ent->type = EIO_DT_UNKNOWN;
		1765	flags |= EIO_READDIR_FOUND_UNKNOWN;
		1766	break;
		1767
		1768	#ifdef DT_FIFO
		1769	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
		1770	#endif
		1771	#ifdef DT_CHR
		1772	case DT_CHR: ent->type = EIO_DT_CHR; break;
		1773	#endif
		1774	#ifdef DT_MPC
		1775	case DT_MPC: ent->type = EIO_DT_MPC; break;
		1776	#endif
		1777	#ifdef DT_DIR
		1778	case DT_DIR: ent->type = EIO_DT_DIR; break;
		1779	#endif
		1780	#ifdef DT_NAM
		1781	case DT_NAM: ent->type = EIO_DT_NAM; break;
		1782	#endif
		1783	#ifdef DT_BLK
		1784	case DT_BLK: ent->type = EIO_DT_BLK; break;
		1785	#endif
		1786	#ifdef DT_MPB
		1787	case DT_MPB: ent->type = EIO_DT_MPB; break;
		1788	#endif
		1789	#ifdef DT_REG
		1790	case DT_REG: ent->type = EIO_DT_REG; break;
		1791	#endif
		1792	#ifdef DT_NWK
		1793	case DT_NWK: ent->type = EIO_DT_NWK; break;
		1794	#endif
		1795	#ifdef DT_CMP
		1796	case DT_CMP: ent->type = EIO_DT_CMP; break;
		1797	#endif
		1798	#ifdef DT_LNK
		1799	case DT_LNK: ent->type = EIO_DT_LNK; break;
		1800	#endif
		1801	#ifdef DT_SOCK
		1802	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
		1803	#endif
		1804	#ifdef DT_DOOR
		1805	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
		1806	#endif
		1807	#ifdef DT_WHT
		1808	case DT_WHT: ent->type = EIO_DT_WHT; break;
		1809	#endif
		1810	}
		1811
		1812	ent->score = 7;
		1813
		1814	if (flags & EIO_READDIR_DIRS_FIRST)
		1815	{
		1816	if (ent->type == EIO_DT_UNKNOWN)
		1817	{
		1818	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
		1819	ent->score = 1;
		1820	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
		1821	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
		1822	}
		1823	else if (ent->type == EIO_DT_DIR)
		1824	ent->score = 0;
		1825	}
		1826	}
		1827
942	memofs += len;	1828	namesoffs += len;
		1829	++dentoffs;
		1830	}
		1831
		1832	if (EIO_CANCELLED (req))
		1833	{
		1834	errno = ECANCELED;
		1835	break;
943	}	1836	}
944	}	1837	}
945
946	if (errno)
947	res = -1;
948
949	req->result = res;
950	}	1838	}
951		1839
952	/*****************************************************************************/	1840	/*****************************************************************************/
953		1841
954	#define ALLOC(len) \	1842	#define ALLOC(len) \
…		…
969	X_THREAD_PROC (etp_proc)	1857	X_THREAD_PROC (etp_proc)
970	{	1858	{
971	ETP_REQ *req;	1859	ETP_REQ *req;
972	struct timespec ts;	1860	struct timespec ts;
973	etp_worker *self = (etp_worker *)thr_arg;	1861	etp_worker *self = (etp_worker *)thr_arg;
		1862	int timeout;
974		1863
975	/* try to distribute timeouts somewhat randomly */	1864	/* try to distribute timeouts somewhat evenly */
976	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1865	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
977		1866
978	for (;;)	1867	for (;;)
979	{	1868	{
		1869	ts.tv_sec = 0;
		1870
980	X_LOCK (reqlock);	1871	X_LOCK (reqlock);
981		1872
982	for (;;)	1873	for (;;)
983	{	1874	{
984	self->req = req = reqq_shift (&req_queue);	1875	self->req = req = reqq_shift (&req_queue);
985		1876
986	if (req)	1877	if (req)
987	break;	1878	break;
988		1879
		1880	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
		1881	{
		1882	X_UNLOCK (reqlock);
		1883	X_LOCK (wrklock);
		1884	--started;
		1885	X_UNLOCK (wrklock);
		1886	goto quit;
		1887	}
		1888
989	++idle;	1889	++idle;
990		1890
991	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1891	if (idle <= max_idle)
992	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1892	/* we are allowed to idle, so do so without any timeout */
		1893	X_COND_WAIT (reqwait, reqlock);
		1894	else
993	{	1895	{
994	if (idle > max_idle)	1896	/* initialise timeout once */
995	{	1897	if (!ts.tv_sec)
996	--idle;	1898	ts.tv_sec = time (0) + idle_timeout;
997	X_UNLOCK (reqlock);
998	X_LOCK (wrklock);
999	--started;
1000	X_UNLOCK (wrklock);
1001	goto quit;
1002	}
1003		1899
1004	/* we are allowed to idle, so do so without any timeout */
1005	X_COND_WAIT (reqwait, reqlock);	1900	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
		1901	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
1006	}	1902	}
1007		1903
1008	--idle;	1904	--idle;
1009	}	1905	}
1010		1906
…		…
1013	X_UNLOCK (reqlock);	1909	X_UNLOCK (reqlock);
1014		1910
1015	if (req->type < 0)	1911	if (req->type < 0)
1016	goto quit;	1912	goto quit;
1017		1913
1018	if (!EIO_CANCELLED (req))
1019	ETP_EXECUTE (self, req);	1914	ETP_EXECUTE (self, req);
1020		1915
1021	X_LOCK (reslock);	1916	X_LOCK (reslock);
1022		1917
1023	++npending;	1918	++npending;
1024		1919
…		…
1039	return 0;	1934	return 0;
1040	}	1935	}
1041		1936
1042	/*****************************************************************************/	1937	/*****************************************************************************/
1043		1938
		1939	int ecb_cold
1044	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1940	eio_init (void (*want_poll)(void), void (*done_poll)(void))
1045	{	1941	{
1046	return etp_init (want_poll, done_poll);	1942	return etp_init (want_poll, done_poll);
1047	}	1943	}
1048		1944
		1945	ecb_inline void
1049	static void eio_api_destroy (eio_req *req)	1946	eio_api_destroy (eio_req *req)
1050	{	1947	{
1051	free (req);	1948	free (req);
1052	}	1949	}
1053		1950
1054	#define REQ(rtype) \	1951	#define REQ(rtype) \
…		…
1073	{ \	1970	{ \
1074	eio_api_destroy (req); \	1971	eio_api_destroy (req); \
1075	return 0; \	1972	return 0; \
1076	}	1973	}
1077		1974
		1975	static void
1078	static void eio_execute (etp_worker *self, eio_req *req)	1976	eio_execute (etp_worker *self, eio_req *req)
1079	{	1977	{
1080	errno = 0;	1978	if (ecb_expect_false (EIO_CANCELLED (req)))
		1979	{
		1980	req->result = -1;
		1981	req->errorno = ECANCELED;
		1982	return;
		1983	}
1081		1984
1082	switch (req->type)	1985	switch (req->type)
1083	{	1986	{
1084	case EIO_READ: ALLOC (req->size);	1987	case EIO_READ: ALLOC (req->size);
1085	req->result = req->offs >= 0	1988	req->result = req->offs >= 0
…		…
1097	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	2000	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1098	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;	2001	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
1099	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	2002	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1100	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;	2003	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
1101		2004
		2005	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		2006	req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		2007	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		2008	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		2009
1102	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;	2010	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
1103	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;	2011	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
1104	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;	2012	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
1105	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;	2013	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
1106	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;	2014	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
…		…
1113	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;	2021	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
1114	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;	2022	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
1115	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;	2023	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
1116	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;	2024	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
1117	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;	2025	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
1118	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->int3); break;	2026	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
1119		2027
		2028	case EIO_REALPATH: eio__realpath (req, self); break;
		2029
1120	case EIO_READLINK: ALLOC (NAME_MAX);	2030	case EIO_READLINK: ALLOC (PATH_MAX);
1121	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;	2031	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
1122		2032
1123	case EIO_SYNC: req->result = 0; sync (); break;	2033	case EIO_SYNC: req->result = 0; sync (); break;
1124	case EIO_FSYNC: req->result = fsync (req->int1); break;	2034	case EIO_FSYNC: req->result = fsync (req->int1); break;
1125	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;	2035	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		2036	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
		2037	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
		2038	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
		2039	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
		2040	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		2041	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
1126		2042
1127	case EIO_READDIR: eio__scandir (req, self); break;	2043	case EIO_READDIR: eio__scandir (req, self); break;
1128		2044
1129	case EIO_BUSY:	2045	case EIO_BUSY:
1130	#ifdef _WIN32	2046	#ifdef _WIN32
1131	Sleep (req->nv1 * 1000.);	2047	Sleep (req->nv1 * 1e3);
1132	#else	2048	#else
1133	{	2049	{
1134	struct timeval tv;	2050	struct timeval tv;
1135		2051
1136	tv.tv_sec = req->nv1;	2052	tv.tv_sec = req->nv1;
1137	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;	2053	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6;
1138		2054
1139	req->result = select (0, 0, 0, 0, &tv);	2055	req->result = select (0, 0, 0, 0, &tv);
1140	}	2056	}
1141	#endif	2057	#endif
1142	break;	2058	break;
…		…
1157	times = tv;	2073	times = tv;
1158	}	2074	}
1159	else	2075	else
1160	times = 0;	2076	times = 0;
1161		2077
1162
1163	req->result = req->type == EIO_FUTIME	2078	req->result = req->type == EIO_FUTIME
1164	? futimes (req->int1, times)	2079	? futimes (req->int1, times)
1165	: utimes (req->ptr1, times);	2080	: utimes (req->ptr1, times);
1166	}	2081	}
		2082	break;
1167		2083
1168	case EIO_GROUP:	2084	case EIO_GROUP:
		2085	abort (); /* handled in eio_request */
		2086
1169	case EIO_NOP:	2087	case EIO_NOP:
1170	req->result = 0;	2088	req->result = 0;
1171	break;	2089	break;
1172		2090
1173	case EIO_CUSTOM:	2091	case EIO_CUSTOM:
1174	req->feed (req);	2092	req->feed (req);
1175	break;	2093	break;
1176		2094
1177	default:	2095	default:
		2096	errno = ENOSYS;
1178	req->result = -1;	2097	req->result = -1;
1179	break;	2098	break;
1180	}	2099	}
1181		2100
1182	req->errorno = errno;	2101	req->errorno = errno;
…		…
1202	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)	2121	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
1203	{	2122	{
1204	REQ (EIO_FSYNC); req->int1 = fd; SEND;	2123	REQ (EIO_FSYNC); req->int1 = fd; SEND;
1205	}	2124	}
1206		2125
		2126	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2127	{
		2128	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2129	}
		2130
		2131	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2132	{
		2133	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2134	}
		2135
		2136	eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data)
		2137	{
		2138	REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND;
		2139	}
		2140
		2141	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
		2142	{
		2143	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
		2144	}
		2145
		2146	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		2147	{
		2148	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		2149	}
		2150
		2151	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
		2152	{
		2153	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
		2154	}
		2155
1207	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)	2156	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1208	{	2157	{
1209	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;	2158	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1210	}	2159	}
1211		2160
…		…
1232	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)	2181	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
1233	{	2182	{
1234	REQ (EIO_FSTAT); req->int1 = fd; SEND;	2183	REQ (EIO_FSTAT); req->int1 = fd; SEND;
1235	}	2184	}
1236		2185
		2186	eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data)
		2187	{
		2188	REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
		2189	}
		2190
1237	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)	2191	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
1238	{	2192	{
1239	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;	2193	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
1240	}	2194	}
1241		2195
…		…
1247	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)	2201	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
1248	{	2202	{
1249	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;	2203	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1250	}	2204	}
1251		2205
1252	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)	2206	eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1253	{	2207	{
1254	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2208	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1255	}	2209	}
1256		2210
1257	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)	2211	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
…		…
1277	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)	2231	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
1278	{	2232	{
1279	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;	2233	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1280	}	2234	}
1281		2235
1282	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)	2236	eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1283	{	2237	{
1284	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2238	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1285	}	2239	}
1286		2240
1287	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)	2241	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
…		…
1303	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)	2257	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
1304	{	2258	{
1305	return eio__1path (EIO_READLINK, path, pri, cb, data);	2259	return eio__1path (EIO_READLINK, path, pri, cb, data);
1306	}	2260	}
1307		2261
		2262	eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
		2263	{
		2264	return eio__1path (EIO_REALPATH, path, pri, cb, data);
		2265	}
		2266
1308	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)	2267	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
1309	{	2268	{
1310	return eio__1path (EIO_STAT, path, pri, cb, data);	2269	return eio__1path (EIO_STAT, path, pri, cb, data);
1311	}	2270	}
1312		2271
1313	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)	2272	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
1314	{	2273	{
1315	return eio__1path (EIO_LSTAT, path, pri, cb, data);	2274	return eio__1path (EIO_LSTAT, path, pri, cb, data);
1316	}	2275	}
1317		2276
		2277	eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data)
		2278	{
		2279	return eio__1path (EIO_STATVFS, path, pri, cb, data);
		2280	}
		2281
1318	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)	2282	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
1319	{	2283	{
1320	return eio__1path (EIO_UNLINK, path, pri, cb, data);	2284	return eio__1path (EIO_UNLINK, path, pri, cb, data);
1321	}	2285	}
1322		2286
1323	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)	2287	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
1324	{	2288	{
1325	return eio__1path (EIO_RMDIR, path, pri, cb, data);	2289	return eio__1path (EIO_RMDIR, path, pri, cb, data);
1326	}	2290	}
1327		2291
1328	eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data)	2292	eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data)
1329	{	2293	{
1330	return eio__1path (EIO_READDIR, path, pri, cb, data);	2294	REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
1331	}	2295	}
1332		2296
1333	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)	2297	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1334	{	2298	{
1335	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND;	2299	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND;
1336	}	2300	}
1337		2301
1338	static eio_req *	2302	static eio_req *
1339	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)	2303	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1340	{	2304	{
…		…
1364	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)	2328	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1365	{	2329	{
1366	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);	2330	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
1367	}	2331	}
1368		2332
1369	eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data)	2333	eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
1370	{	2334	{
1371	REQ (EIO_CUSTOM); req->feed = execute; SEND;	2335	REQ (EIO_CUSTOM); req->feed = execute; SEND;
1372	}	2336	}
1373		2337
1374	#endif	2338	#endif
…		…
1385	#undef SEND	2349	#undef SEND
1386		2350
1387	/*****************************************************************************/	2351	/*****************************************************************************/
1388	/* grp functions */	2352	/* grp functions */
1389		2353
		2354	void
1390	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	2355	eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1391	{	2356	{
1392	grp->int2 = limit;	2357	grp->int2 = limit;
1393	grp->feed = feed;	2358	grp->feed = feed;
1394		2359
1395	grp_try_feed (grp);	2360	grp_try_feed (grp);
1396	}	2361	}
1397		2362
		2363	void
1398	void eio_grp_limit (eio_req *grp, int limit)	2364	eio_grp_limit (eio_req *grp, int limit)
1399	{	2365	{
1400	grp->int2 = limit;	2366	grp->int2 = limit;
1401		2367
1402	grp_try_feed (grp);	2368	grp_try_feed (grp);
1403	}	2369	}
1404		2370
		2371	void
1405	void eio_grp_add (eio_req *grp, eio_req *req)	2372	eio_grp_add (eio_req *grp, eio_req *req)
1406	{	2373	{
1407	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2374	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
		2375
		2376	grp->flags |= EIO_FLAG_GROUPADD;
1408		2377
1409	++grp->size;	2378	++grp->size;
1410	req->grp = grp;	2379	req->grp = grp;
1411		2380
1412	req->grp_prev = 0;	2381	req->grp_prev = 0;
…		…
1419	}	2388	}
1420		2389
1421	/*****************************************************************************/	2390	/*****************************************************************************/
1422	/* misc garbage */	2391	/* misc garbage */
1423		2392
		2393	eio_ssize_t
1424	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)	2394	eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
1425	{	2395	{
1426	etp_worker wrk;	2396	etp_worker wrk;
		2397	eio_ssize_t ret;
1427		2398
1428	wrk.dbuf = 0;	2399	wrk.dbuf = 0;
1429		2400
1430	eio__sendfile (ofd, ifd, offset, count, &wrk);	2401	ret = eio__sendfile (ofd, ifd, offset, count, &wrk);
1431		2402
1432	if (wrk.dbuf)	2403	if (wrk.dbuf)
1433	free (wrk.dbuf);	2404	free (wrk.dbuf);
1434	}
1435		2405
		2406	return ret;
		2407	}
		2408

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