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Comparing cvsroot/libeio/eio.c (file contents):
Revision 1.33 by root, Sat Jun 6 19:44:17 2009 UTC vs.
Revision 1.88 by root, Thu Jul 14 19:31:43 2011 UTC

1	/*	1	/*
2	* libeio implementation	2	* libeio implementation
3	*	3	*
4	* Copyright (c) 2007,2008,2009 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"
41		46
42	#ifdef EIO_STACKSIZE	47	#ifdef EIO_STACKSIZE
43	# define XTHREAD_STACKSIZE EIO_STACKSIZE	48	# define XTHREAD_STACKSIZE EIO_STACKSIZE
44	#endif	49	#endif
45	#include "xthread.h"	50	#include "xthread.h"
…		…
53	#include <sys/stat.h>	58	#include <sys/stat.h>
54	#include <limits.h>	59	#include <limits.h>
55	#include <fcntl.h>	60	#include <fcntl.h>
56	#include <assert.h>	61	#include <assert.h>
57		62
		63	#include <sys/statvfs.h>
		64	/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */
		65	/* intptr_t only comes from stdint.h, says idiot openbsd coder */
		66	#if HAVE_STDINT_H
		67	# include <stdint.h>
		68	#endif
		69
		70	#ifndef ECANCELED
		71	# define ECANCELED EDOM
		72	#endif
		73
		74	static void eio_destroy (eio_req *req);
		75
58	#ifndef EIO_FINISH	76	#ifndef EIO_FINISH
59	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	77	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
60	#endif	78	#endif
61		79
62	#ifndef EIO_DESTROY	80	#ifndef EIO_DESTROY
…		…
65		83
66	#ifndef EIO_FEED	84	#ifndef EIO_FEED
67	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)	85	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)
68	#endif	86	#endif
69		87
		88	#ifndef EIO_FD_TO_WIN32_HANDLE
		89	# define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		90	#endif
		91	#ifndef EIO_WIN32_HANDLE_TO_FD
		92	# define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		93	#endif
		94
		95	#define EIO_ERRNO(errval,retval) ((errno = errval), retval)
		96
		97	#define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1)
		98
70	#ifdef _WIN32	99	#ifdef _WIN32
71		100
72	/*doh*/	101	#define PAGESIZE 4096 /* GetSystemInfo? */
		102
		103	#ifdef EIO_STRUCT_STATI64
		104	#define stat(path,buf) _stati64 (path,buf)
		105	#define fstat(fd,buf) _fstati64 (path,buf)
		106	#endif
		107	#define lstat(path,buf) stat (path,buf)
		108	#define fsync(fd) (FlushFileBuffers (EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
		109	#define mkdir(path,mode) _mkdir (path)
		110	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
		111
		112	#define chown(path,uid,gid) EIO_ENOSYS ()
		113	#define fchown(fd,uid,gid) EIO_ENOSYS ()
		114	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
		115	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
		116	#define mknod(path,mode,dev) EIO_ENOSYS ()
		117	#define sync() EIO_ENOSYS ()
		118
		119	/* we could even stat and see if it exists */
		120	static int
		121	symlink (const char *old, const char *neu)
		122	{
		123	if (CreateSymbolicLink (neu, old, 1))
		124	return 0;
		125
		126	if (CreateSymbolicLink (neu, old, 0))
		127	return 0;
		128
		129	return EIO_ERRNO (ENOENT, -1);
		130	}
		131
73	#else	132	#else
74		133
75	# include "config.h"
76	# include <sys/time.h>	134	#include <sys/time.h>
77	# include <sys/select.h>	135	#include <sys/select.h>
		136	#include <sys/statvfs.h>
78	# include <unistd.h>	137	#include <unistd.h>
79	# include <utime.h>	138	#include <utime.h>
80	# include <signal.h>	139	#include <signal.h>
81	# include <dirent.h>	140	#include <dirent.h>
82		141
		142	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		143	#include <sys/mman.h>
		144	#endif
		145
83	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */	146	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
84	# if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)	147	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
85	# define _DIRENT_HAVE_D_TYPE /* sigh */	148	#define _DIRENT_HAVE_D_TYPE /* sigh */
86	# define D_INO(de) (de)->d_fileno	149	#define D_INO(de) (de)->d_fileno
87	# define D_NAMLEN(de) (de)->d_namlen	150	#define D_NAMLEN(de) (de)->d_namlen
88	# elif defined(__linux) || defined(d_ino) || _XOPEN_SOURCE >= 600	151	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
89	# define D_INO(de) (de)->d_ino	152	#define D_INO(de) (de)->d_ino
90	# endif	153	#endif
91		154
92	#ifdef _D_EXACT_NAMLEN	155	#ifdef _D_EXACT_NAMLEN
93	# undef D_NAMLEN	156	#undef D_NAMLEN
94	# define D_NAMLEN(de) _D_EXACT_NAMLEN (de)	157	#define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
95	#endif	158	#endif
96		159
97	# ifdef _DIRENT_HAVE_D_TYPE	160	#ifdef _DIRENT_HAVE_D_TYPE
98	# define D_TYPE(de) (de)->d_type	161	#define D_TYPE(de) (de)->d_type
99	# endif	162	#endif
100		163
101	# ifndef EIO_STRUCT_DIRENT	164	#ifndef EIO_STRUCT_DIRENT
102	# define EIO_STRUCT_DIRENT struct dirent	165	#define EIO_STRUCT_DIRENT struct dirent
103	# endif	166	#endif
104		167
105	#endif	168	#endif
106		169
107	#if HAVE_SENDFILE	170	#if HAVE_SENDFILE
108	# if __linux	171	# if __linux
109	# include <sys/sendfile.h>	172	# include <sys/sendfile.h>
110	# elif __freebsd	173	# elif __FreeBSD__ || defined __APPLE__
111	# include <sys/socket.h>	174	# include <sys/socket.h>
112	# include <sys/uio.h>	175	# include <sys/uio.h>
113	# elif __hpux	176	# elif __hpux
114	# include <sys/socket.h>	177	# include <sys/socket.h>
115	# elif __solaris /* not yet */	178	# elif __solaris
116	# include <sys/sendfile.h>	179	# include <sys/sendfile.h>
117	# else	180	# else
118	# error sendfile support requested but not available	181	# error sendfile support requested but not available
119	# endif	182	# endif
120	#endif	183	#endif
…		…
127	#endif	190	#endif
128	#ifndef D_NAMLEN	191	#ifndef D_NAMLEN
129	# define D_NAMLEN(de) strlen ((de)->d_name)	192	# define D_NAMLEN(de) strlen ((de)->d_name)
130	#endif	193	#endif
131		194
132	/* number of seconds after which an idle threads exit */
133	#define IDLE_TIMEOUT 10
134
135	/* used for struct dirent, AIX doesn't provide it */	195	/* used for struct dirent, AIX doesn't provide it */
136	#ifndef NAME_MAX	196	#ifndef NAME_MAX
137	# define NAME_MAX 4096	197	# define NAME_MAX 4096
		198	#endif
		199
		200	/* used for readlink etc. */
		201	#ifndef PATH_MAX
		202	# define PATH_MAX 4096
138	#endif	203	#endif
139		204
140	/* buffer size for various temporary buffers */	205	/* buffer size for various temporary buffers */
141	#define EIO_BUFSIZE 65536	206	#define EIO_BUFSIZE 65536
142		207
…		…
148	errno = ENOMEM; \	213	errno = ENOMEM; \
149	if (!eio_buf) \	214	if (!eio_buf) \
150	return -1;	215	return -1;
151		216
152	#define EIO_TICKS ((1000000 + 1023) >> 10)	217	#define EIO_TICKS ((1000000 + 1023) >> 10)
153
154	/*****************************************************************************/
155
156	#if __GNUC__ >= 3
157	# define expect(expr,value) __builtin_expect ((expr),(value))
158	#else
159	# define expect(expr,value) (expr)
160	#endif
161
162	#define expect_false(expr) expect ((expr) != 0, 0)
163	#define expect_true(expr) expect ((expr) != 0, 1)
164
165	/*****************************************************************************/
166		218
167	#define ETP_PRI_MIN EIO_PRI_MIN	219	#define ETP_PRI_MIN EIO_PRI_MIN
168	#define ETP_PRI_MAX EIO_PRI_MAX	220	#define ETP_PRI_MAX EIO_PRI_MAX
169		221
170	struct etp_worker;	222	struct etp_worker;
…		…
195		247
196	/*****************************************************************************/	248	/*****************************************************************************/
197		249
198	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)	250	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
199		251
200	/* calculcate time difference in ~1/EIO_TICKS of a second */	252	/* calculate time difference in ~1/EIO_TICKS of a second */
		253	ecb_inline int
201	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	254	tvdiff (struct timeval *tv1, struct timeval *tv2)
202	{	255	{
203	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	256	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
204	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);	257	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
205	}	258	}
206		259
…		…
213	static unsigned int max_poll_reqs; /* reslock */	266	static unsigned int max_poll_reqs; /* reslock */
214		267
215	static volatile unsigned int nreqs; /* reqlock */	268	static volatile unsigned int nreqs; /* reqlock */
216	static volatile unsigned int nready; /* reqlock */	269	static volatile unsigned int nready; /* reqlock */
217	static volatile unsigned int npending; /* reqlock */	270	static volatile unsigned int npending; /* reqlock */
218	static volatile unsigned int max_idle = 4;	271	static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
		272	static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
219		273
220	static mutex_t wrklock = X_MUTEX_INIT;	274	static xmutex_t wrklock;
221	static mutex_t reslock = X_MUTEX_INIT;	275	static xmutex_t reslock;
222	static mutex_t reqlock = X_MUTEX_INIT;	276	static xmutex_t reqlock;
223	static cond_t reqwait = X_COND_INIT;	277	static xcond_t reqwait;
224		278
225	#if !HAVE_PREADWRITE	279	#if !HAVE_PREADWRITE
226	/*	280	/*
227	* make our pread/pwrite emulation safe against themselves, but not against	281	* make our pread/pwrite emulation safe against themselves, but not against
228	* normal read/write by using a mutex. slows down execution a lot,	282	* normal read/write by using a mutex. slows down execution a lot,
229	* but that's your problem, not mine.	283	* but that's your problem, not mine.
230	*/	284	*/
231	static mutex_t preadwritelock = X_MUTEX_INIT;	285	static xmutex_t preadwritelock = X_MUTEX_INIT;
232	#endif	286	#endif
233		287
234	typedef struct etp_worker	288	typedef struct etp_worker
235	{	289	{
236	/* locked by wrklock */	290	/* locked by wrklock */
237	struct etp_worker *prev, *next;	291	struct etp_worker *prev, *next;
238		292
239	thread_t tid;	293	xthread_t tid;
240		294
241	/* locked by reslock, reqlock or wrklock */	295	/* locked by reslock, reqlock or wrklock */
242	ETP_REQ *req; /* currently processed request */	296	ETP_REQ *req; /* currently processed request */
243		297
244	ETP_WORKER_COMMON	298	ETP_WORKER_COMMON
…		…
249	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)	303	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
250	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)	304	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
251		305
252	/* worker threads management */	306	/* worker threads management */
253		307
		308	static void ecb_cold
254	static void etp_worker_clear (etp_worker *wrk)	309	etp_worker_clear (etp_worker *wrk)
255	{	310	{
256	ETP_WORKER_CLEAR (wrk);	311	ETP_WORKER_CLEAR (wrk);
257	}	312	}
258		313
		314	static void ecb_cold
259	static void etp_worker_free (etp_worker *wrk)	315	etp_worker_free (etp_worker *wrk)
260	{	316	{
261	wrk->next->prev = wrk->prev;	317	wrk->next->prev = wrk->prev;
262	wrk->prev->next = wrk->next;	318	wrk->prev->next = wrk->next;
263		319
264	free (wrk);	320	free (wrk);
265	}	321	}
266		322
267	static unsigned int etp_nreqs (void)	323	static unsigned int
		324	etp_nreqs (void)
268	{	325	{
269	int retval;	326	int retval;
270	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	327	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
271	retval = nreqs;	328	retval = nreqs;
272	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	329	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
273	return retval;	330	return retval;
274	}	331	}
275		332
276	static unsigned int etp_nready (void)	333	static unsigned int
		334	etp_nready (void)
277	{	335	{
278	unsigned int retval;	336	unsigned int retval;
279		337
280	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	338	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
281	retval = nready;	339	retval = nready;
282	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	340	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
283		341
284	return retval;	342	return retval;
285	}	343	}
286		344
287	static unsigned int etp_npending (void)	345	static unsigned int
		346	etp_npending (void)
288	{	347	{
289	unsigned int retval;	348	unsigned int retval;
290		349
291	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	350	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
292	retval = npending;	351	retval = npending;
293	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	352	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
294		353
295	return retval;	354	return retval;
296	}	355	}
297		356
298	static unsigned int etp_nthreads (void)	357	static unsigned int
		358	etp_nthreads (void)
299	{	359	{
300	unsigned int retval;	360	unsigned int retval;
301		361
302	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	362	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
303	retval = started;	363	retval = started;
…		…
317	} etp_reqq;	377	} etp_reqq;
318		378
319	static etp_reqq req_queue;	379	static etp_reqq req_queue;
320	static etp_reqq res_queue;	380	static etp_reqq res_queue;
321		381
		382	static int ecb_noinline
322	static int reqq_push (etp_reqq *q, ETP_REQ *req)	383	reqq_push (etp_reqq *q, ETP_REQ *req)
323	{	384	{
324	int pri = req->pri;	385	int pri = req->pri;
325	req->next = 0;	386	req->next = 0;
326		387
327	if (q->qe[pri])	388	if (q->qe[pri])
…		…
333	q->qe[pri] = q->qs[pri] = req;	394	q->qe[pri] = q->qs[pri] = req;
334		395
335	return q->size++;	396	return q->size++;
336	}	397	}
337		398
		399	static ETP_REQ * ecb_noinline
338	static ETP_REQ *reqq_shift (etp_reqq *q)	400	reqq_shift (etp_reqq *q)
339	{	401	{
340	int pri;	402	int pri;
341		403
342	if (!q->size)	404	if (!q->size)
343	return 0;	405	return 0;
…		…
358	}	420	}
359		421
360	abort ();	422	abort ();
361	}	423	}
362		424
363	static void etp_atfork_prepare (void)	425	static void ecb_cold
		426	etp_thread_init (void)
364	{	427	{
365	X_LOCK (wrklock);
366	X_LOCK (reqlock);
367	X_LOCK (reslock);
368	#if !HAVE_PREADWRITE	428	#if !HAVE_PREADWRITE
369	X_LOCK (preadwritelock);	429	X_MUTEX_CREATE (preadwritelock);
370	#endif	430	#endif
		431	X_MUTEX_CREATE (wrklock);
		432	X_MUTEX_CREATE (reslock);
		433	X_MUTEX_CREATE (reqlock);
		434	X_COND_CREATE (reqwait);
371	}	435	}
372		436
		437	static void ecb_cold
		438	etp_atfork_prepare (void)
		439	{
		440	}
		441
		442	static void ecb_cold
373	static void etp_atfork_parent (void)	443	etp_atfork_parent (void)
374	{	444	{
375	#if !HAVE_PREADWRITE
376	X_UNLOCK (preadwritelock);
377	#endif
378	X_UNLOCK (reslock);
379	X_UNLOCK (reqlock);
380	X_UNLOCK (wrklock);
381	}	445	}
382		446
		447	static void ecb_cold
383	static void etp_atfork_child (void)	448	etp_atfork_child (void)
384	{	449	{
385	ETP_REQ *prv;	450	ETP_REQ *prv;
386		451
387	while ((prv = reqq_shift (&req_queue)))	452	while ((prv = reqq_shift (&req_queue)))
388	ETP_DESTROY (prv);	453	ETP_DESTROY (prv);
…		…
405	idle = 0;	470	idle = 0;
406	nreqs = 0;	471	nreqs = 0;
407	nready = 0;	472	nready = 0;
408	npending = 0;	473	npending = 0;
409		474
410	etp_atfork_parent ();	475	etp_thread_init ();
411	}	476	}
412		477
413	static void	478	static void ecb_cold
414	etp_once_init (void)	479	etp_once_init (void)
415	{	480	{
		481	etp_thread_init ();
416	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);	482	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
417	}	483	}
418		484
419	static int	485	static int ecb_cold
420	etp_init (void (*want_poll)(void), void (*done_poll)(void))	486	etp_init (void (*want_poll)(void), void (*done_poll)(void))
421	{	487	{
422	static pthread_once_t doinit = PTHREAD_ONCE_INIT;	488	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
423		489
424	pthread_once (&doinit, etp_once_init);	490	pthread_once (&doinit, etp_once_init);
…		…
429	return 0;	495	return 0;
430	}	496	}
431		497
432	X_THREAD_PROC (etp_proc);	498	X_THREAD_PROC (etp_proc);
433		499
		500	static void ecb_cold
434	static void etp_start_thread (void)	501	etp_start_thread (void)
435	{	502	{
436	etp_worker *wrk = calloc (1, sizeof (etp_worker));	503	etp_worker *wrk = calloc (1, sizeof (etp_worker));
437		504
438	/*TODO*/	505	/*TODO*/
439	assert (("unable to allocate worker thread data", wrk));	506	assert (("unable to allocate worker thread data", wrk));
…		…
452	free (wrk);	519	free (wrk);
453		520
454	X_UNLOCK (wrklock);	521	X_UNLOCK (wrklock);
455	}	522	}
456		523
		524	static void
457	static void etp_maybe_start_thread (void)	525	etp_maybe_start_thread (void)
458	{	526	{
459	if (expect_true (etp_nthreads () >= wanted))	527	if (ecb_expect_true (etp_nthreads () >= wanted))
460	return;	528	return;
461		529
462	/* todo: maybe use idle here, but might be less exact */	530	/* todo: maybe use idle here, but might be less exact */
463	if (expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))	531	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
464	return;	532	return;
465		533
466	etp_start_thread ();	534	etp_start_thread ();
467	}	535	}
468		536
		537	static void ecb_cold
469	static void etp_end_thread (void)	538	etp_end_thread (void)
470	{	539	{
471	eio_req *req = calloc (1, sizeof (eio_req));	540	eio_req *req = calloc (1, sizeof (eio_req));
472		541
473	req->type = -1;	542	req->type = -1;
474	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;	543	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
…		…
481	X_LOCK (wrklock);	550	X_LOCK (wrklock);
482	--started;	551	--started;
483	X_UNLOCK (wrklock);	552	X_UNLOCK (wrklock);
484	}	553	}
485		554
486	static int etp_poll (void)	555	static int
		556	etp_poll (void)
487	{	557	{
488	unsigned int maxreqs;	558	unsigned int maxreqs;
489	unsigned int maxtime;	559	unsigned int maxtime;
490	struct timeval tv_start, tv_now;	560	struct timeval tv_start, tv_now;
491		561
…		…
521		591
522	X_LOCK (reqlock);	592	X_LOCK (reqlock);
523	--nreqs;	593	--nreqs;
524	X_UNLOCK (reqlock);	594	X_UNLOCK (reqlock);
525		595
526	if (expect_false (req->type == EIO_GROUP && req->size))	596	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
527	{	597	{
528	req->int1 = 1; /* mark request as delayed */	598	req->int1 = 1; /* mark request as delayed */
529	continue;	599	continue;
530	}	600	}
531	else	601	else
532	{	602	{
533	int res = ETP_FINISH (req);	603	int res = ETP_FINISH (req);
534	if (expect_false (res))	604	if (ecb_expect_false (res))
535	return res;	605	return res;
536	}	606	}
537		607
538	if (expect_false (maxreqs && !--maxreqs))	608	if (ecb_expect_false (maxreqs && !--maxreqs))
539	break;	609	break;
540		610
541	if (maxtime)	611	if (maxtime)
542	{	612	{
543	gettimeofday (&tv_now, 0);	613	gettimeofday (&tv_now, 0);
…		…
549		619
550	errno = EAGAIN;	620	errno = EAGAIN;
551	return -1;	621	return -1;
552	}	622	}
553		623
		624	static void
554	static void etp_cancel (ETP_REQ *req)	625	etp_cancel (ETP_REQ *req)
555	{	626	{
556	X_LOCK (wrklock);	627	req->cancelled = 1;
557	req->flags |= EIO_FLAG_CANCELLED;
558	X_UNLOCK (wrklock);
559		628
560	eio_grp_cancel (req);	629	eio_grp_cancel (req);
561	}	630	}
562		631
		632	static void
563	static void etp_submit (ETP_REQ *req)	633	etp_submit (ETP_REQ *req)
564	{	634	{
565	req->pri -= ETP_PRI_MIN;	635	req->pri -= ETP_PRI_MIN;
566		636
567	if (expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;	637	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
568	if (expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;	638	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
569		639
570	if (expect_false (req->type == EIO_GROUP))	640	if (ecb_expect_false (req->type == EIO_GROUP))
571	{	641	{
572	/* I hope this is worth it :/ */	642	/* I hope this is worth it :/ */
573	X_LOCK (reqlock);	643	X_LOCK (reqlock);
574	++nreqs;	644	++nreqs;
575	X_UNLOCK (reqlock);	645	X_UNLOCK (reqlock);
…		…
594		664
595	etp_maybe_start_thread ();	665	etp_maybe_start_thread ();
596	}	666	}
597	}	667	}
598		668
		669	static void ecb_cold
599	static void etp_set_max_poll_time (double nseconds)	670	etp_set_max_poll_time (double nseconds)
600	{	671	{
601	if (WORDACCESS_UNSAFE) X_LOCK (reslock);	672	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
602	max_poll_time = nseconds;	673	max_poll_time = nseconds * EIO_TICKS;
603	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);	674	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
604	}	675	}
605		676
		677	static void ecb_cold
606	static void etp_set_max_poll_reqs (unsigned int maxreqs)	678	etp_set_max_poll_reqs (unsigned int maxreqs)
607	{	679	{
608	if (WORDACCESS_UNSAFE) X_LOCK (reslock);	680	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
609	max_poll_reqs = maxreqs;	681	max_poll_reqs = maxreqs;
610	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);	682	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
611	}	683	}
612		684
		685	static void ecb_cold
613	static void etp_set_max_idle (unsigned int nthreads)	686	etp_set_max_idle (unsigned int nthreads)
614	{	687	{
615	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	688	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
616	max_idle = nthreads <= 0 ? 1 : nthreads;	689	max_idle = nthreads;
617	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	690	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
618	}	691	}
619		692
		693	static void ecb_cold
		694	etp_set_idle_timeout (unsigned int seconds)
		695	{
		696	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		697	idle_timeout = seconds;
		698	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		699	}
		700
		701	static void ecb_cold
620	static void etp_set_min_parallel (unsigned int nthreads)	702	etp_set_min_parallel (unsigned int nthreads)
621	{	703	{
622	if (wanted < nthreads)	704	if (wanted < nthreads)
623	wanted = nthreads;	705	wanted = nthreads;
624	}	706	}
625		707
		708	static void ecb_cold
626	static void etp_set_max_parallel (unsigned int nthreads)	709	etp_set_max_parallel (unsigned int nthreads)
627	{	710	{
628	if (wanted > nthreads)	711	if (wanted > nthreads)
629	wanted = nthreads;	712	wanted = nthreads;
630		713
631	while (started > wanted)	714	while (started > wanted)
632	etp_end_thread ();	715	etp_end_thread ();
633	}	716	}
634		717
635	/*****************************************************************************/	718	/*****************************************************************************/
636		719
		720	static void
637	static void grp_try_feed (eio_req *grp)	721	grp_try_feed (eio_req *grp)
638	{	722	{
639	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	723	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
640	{	724	{
641	grp->flags &= ~EIO_FLAG_GROUPADD;	725	grp->flags &= ~EIO_FLAG_GROUPADD;
642		726
…		…
649	break;	733	break;
650	}	734	}
651	}	735	}
652	}	736	}
653		737
		738	static int
654	static int grp_dec (eio_req *grp)	739	grp_dec (eio_req *grp)
655	{	740	{
656	--grp->size;	741	--grp->size;
657		742
658	/* call feeder, if applicable */	743	/* call feeder, if applicable */
659	grp_try_feed (grp);	744	grp_try_feed (grp);
…		…
663	return eio_finish (grp);	748	return eio_finish (grp);
664	else	749	else
665	return 0;	750	return 0;
666	}	751	}
667		752
		753	static void
668	void eio_destroy (eio_req *req)	754	eio_destroy (eio_req *req)
669	{	755	{
670	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);	756	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
671	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);	757	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
672		758
673	EIO_DESTROY (req);	759	EIO_DESTROY (req);
674	}	760	}
675		761
		762	static int
676	static int eio_finish (eio_req *req)	763	eio_finish (eio_req *req)
677	{	764	{
678	int res = EIO_FINISH (req);	765	int res = EIO_FINISH (req);
679		766
680	if (req->grp)	767	if (req->grp)
681	{	768	{
…		…
689	if (grp->grp_first == req)	776	if (grp->grp_first == req)
690	grp->grp_first = req->grp_next;	777	grp->grp_first = req->grp_next;
691		778
692	res2 = grp_dec (grp);	779	res2 = grp_dec (grp);
693		780
694	if (!res && res2)	781	if (!res)
695	res = res2;	782	res = res2;
696	}	783	}
697		784
698	eio_destroy (req);	785	eio_destroy (req);
699		786
700	return res;	787	return res;
701	}	788	}
702		789
		790	void
703	void eio_grp_cancel (eio_req *grp)	791	eio_grp_cancel (eio_req *grp)
704	{	792	{
705	for (grp = grp->grp_first; grp; grp = grp->grp_next)	793	for (grp = grp->grp_first; grp; grp = grp->grp_next)
706	eio_cancel (grp);	794	eio_cancel (grp);
707	}	795	}
708		796
		797	void
709	void eio_cancel (eio_req *req)	798	eio_cancel (eio_req *req)
710	{	799	{
711	etp_cancel (req);	800	etp_cancel (req);
712	}	801	}
713		802
		803	void
714	void eio_submit (eio_req *req)	804	eio_submit (eio_req *req)
715	{	805	{
716	etp_submit (req);	806	etp_submit (req);
717	}	807	}
718		808
719	unsigned int eio_nreqs (void)	809	unsigned int
		810	eio_nreqs (void)
720	{	811	{
721	return etp_nreqs ();	812	return etp_nreqs ();
722	}	813	}
723		814
724	unsigned int eio_nready (void)	815	unsigned int
		816	eio_nready (void)
725	{	817	{
726	return etp_nready ();	818	return etp_nready ();
727	}	819	}
728		820
729	unsigned int eio_npending (void)	821	unsigned int
		822	eio_npending (void)
730	{	823	{
731	return etp_npending ();	824	return etp_npending ();
732	}	825	}
733		826
734	unsigned int eio_nthreads (void)	827	unsigned int ecb_cold
		828	eio_nthreads (void)
735	{	829	{
736	return etp_nthreads ();	830	return etp_nthreads ();
737	}	831	}
738		832
		833	void ecb_cold
739	void eio_set_max_poll_time (double nseconds)	834	eio_set_max_poll_time (double nseconds)
740	{	835	{
741	etp_set_max_poll_time (nseconds);	836	etp_set_max_poll_time (nseconds);
742	}	837	}
743		838
		839	void ecb_cold
744	void eio_set_max_poll_reqs (unsigned int maxreqs)	840	eio_set_max_poll_reqs (unsigned int maxreqs)
745	{	841	{
746	etp_set_max_poll_reqs (maxreqs);	842	etp_set_max_poll_reqs (maxreqs);
747	}	843	}
748		844
		845	void ecb_cold
749	void eio_set_max_idle (unsigned int nthreads)	846	eio_set_max_idle (unsigned int nthreads)
750	{	847	{
751	etp_set_max_idle (nthreads);	848	etp_set_max_idle (nthreads);
752	}	849	}
753		850
		851	void ecb_cold
		852	eio_set_idle_timeout (unsigned int seconds)
		853	{
		854	etp_set_idle_timeout (seconds);
		855	}
		856
		857	void ecb_cold
754	void eio_set_min_parallel (unsigned int nthreads)	858	eio_set_min_parallel (unsigned int nthreads)
755	{	859	{
756	etp_set_min_parallel (nthreads);	860	etp_set_min_parallel (nthreads);
757	}	861	}
758		862
		863	void ecb_cold
759	void eio_set_max_parallel (unsigned int nthreads)	864	eio_set_max_parallel (unsigned int nthreads)
760	{	865	{
761	etp_set_max_parallel (nthreads);	866	etp_set_max_parallel (nthreads);
762	}	867	}
763		868
764	int eio_poll (void)	869	int eio_poll (void)
…		…
773	# undef pread	878	# undef pread
774	# undef pwrite	879	# undef pwrite
775	# define pread eio__pread	880	# define pread eio__pread
776	# define pwrite eio__pwrite	881	# define pwrite eio__pwrite
777		882
778	static ssize_t	883	static eio_ssize_t
779	eio__pread (int fd, void *buf, size_t count, off_t offset)	884	eio__pread (int fd, void *buf, size_t count, off_t offset)
780	{	885	{
781	ssize_t res;	886	eio_ssize_t res;
782	off_t ooffset;	887	off_t ooffset;
783		888
784	X_LOCK (preadwritelock);	889	X_LOCK (preadwritelock);
785	ooffset = lseek (fd, 0, SEEK_CUR);	890	ooffset = lseek (fd, 0, SEEK_CUR);
786	lseek (fd, offset, SEEK_SET);	891	lseek (fd, offset, SEEK_SET);
…		…
789	X_UNLOCK (preadwritelock);	894	X_UNLOCK (preadwritelock);
790		895
791	return res;	896	return res;
792	}	897	}
793		898
794	static ssize_t	899	static eio_ssize_t
795	eio__pwrite (int fd, void *buf, size_t count, off_t offset)	900	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
796	{	901	{
797	ssize_t res;	902	eio_ssize_t res;
798	off_t ooffset;	903	off_t ooffset;
799		904
800	X_LOCK (preadwritelock);	905	X_LOCK (preadwritelock);
801	ooffset = lseek (fd, 0, SEEK_CUR);	906	ooffset = lseek (fd, 0, SEEK_CUR);
802	lseek (fd, offset, SEEK_SET);	907	lseek (fd, offset, SEEK_SET);
…		…
806		911
807	return res;	912	return res;
808	}	913	}
809	#endif	914	#endif
810		915
811	#ifndef HAVE_FUTIMES	916	#ifndef HAVE_UTIMES
812		917
813	# undef utimes	918	# undef utimes
814	# undef futimes
815	# define utimes(path,times) eio__utimes (path, times)	919	# define utimes(path,times) eio__utimes (path, times)
816	# define futimes(fd,times) eio__futimes (fd, times)
817		920
818	static int	921	static int
819	eio__utimes (const char *filename, const struct timeval times[2])	922	eio__utimes (const char *filename, const struct timeval times[2])
820	{	923	{
821	if (times)	924	if (times)
…		…
829	}	932	}
830	else	933	else
831	return utime (filename, 0);	934	return utime (filename, 0);
832	}	935	}
833		936
		937	#endif
		938
		939	#ifndef HAVE_FUTIMES
		940
		941	# undef futimes
		942	# define futimes(fd,times) eio__futimes (fd, times)
		943
		944	static int
834	static int eio__futimes (int fd, const struct timeval tv[2])	945	eio__futimes (int fd, const struct timeval tv[2])
835	{	946	{
836	errno = ENOSYS;	947	errno = ENOSYS;
837	return -1;	948	return -1;
838	}	949	}
839		950
…		…
843	# undef fdatasync	954	# undef fdatasync
844	# define fdatasync(fd) fsync (fd)	955	# define fdatasync(fd) fsync (fd)
845	#endif	956	#endif
846		957
847	/* sync_file_range always needs emulation */	958	/* sync_file_range always needs emulation */
848	int	959	static int
849	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)	960	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
850	{	961	{
851	#if HAVE_SYNC_FILE_RANGE	962	#if HAVE_SYNC_FILE_RANGE
852	int res;	963	int res;
853		964
…		…
866	if (!res || errno != ENOSYS)	977	if (!res || errno != ENOSYS)
867	return res;	978	return res;
868	#endif	979	#endif
869		980
870	/* even though we could play tricks with the flags, it's better to always	981	/* even though we could play tricks with the flags, it's better to always
871	* call fdatasync, as thta matches the expectation of it's users best */	982	* call fdatasync, as that matches the expectation of its users best */
872	return fdatasync (fd);	983	return fdatasync (fd);
		984	}
		985
		986	static int
		987	eio__fallocate (int fd, int mode, off_t offset, size_t len)
		988	{
		989	#if HAVE_FALLOCATE
		990	return fallocate (fd, mode, offset, len);
		991	#else
		992	errno = ENOSYS;
		993	return -1;
		994	#endif
873	}	995	}
874		996
875	#if !HAVE_READAHEAD	997	#if !HAVE_READAHEAD
876	# undef readahead	998	# undef readahead
877	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)	999	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
878		1000
879	static ssize_t	1001	static eio_ssize_t
880	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)	1002	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
881	{	1003	{
882	size_t todo = count;	1004	size_t todo = count;
883	dBUF;	1005	dBUF;
884		1006
…		…
896	}	1018	}
897		1019
898	#endif	1020	#endif
899		1021
900	/* sendfile always needs emulation */	1022	/* sendfile always needs emulation */
901	static ssize_t	1023	static eio_ssize_t
902	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)	1024	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
903	{	1025	{
		1026	eio_ssize_t written = 0;
904	ssize_t res;	1027	eio_ssize_t res;
905		1028
906	if (!count)	1029	if (!count)
907	return 0;	1030	return 0;
908		1031
		1032	for (;;)
		1033	{
		1034	#ifdef __APPLE__
		1035	# undef HAVE_SENDFILE /* broken, as everything on os x */
		1036	#endif
909	#if HAVE_SENDFILE	1037	#if HAVE_SENDFILE
910	# if __linux	1038	# if __linux
		1039	off_t soffset = offset;
911	res = sendfile (ofd, ifd, &offset, count);	1040	res = sendfile (ofd, ifd, &soffset, count);
912		1041
913	# elif __freebsd	1042	# elif __FreeBSD__
914	/*	1043	/*
915	* Of course, the freebsd sendfile is a dire hack with no thoughts	1044	* Of course, the freebsd sendfile is a dire hack with no thoughts
916	* wasted on making it similar to other I/O functions.	1045	* wasted on making it similar to other I/O functions.
917	*/	1046	*/
918	{
919	off_t sbytes;	1047	off_t sbytes;
920	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	1048	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
921		1049
922	if (res < 0 && sbytes)	1050	#if 0 /* according to the manpage, this is correct, but broken behaviour */
923	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */	1051	/* freebsd' sendfile will return 0 on success */
		1052	/* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
		1053	/* not on e.g. EIO or EPIPE - sounds broken */
		1054	if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
924	res = sbytes;	1055	res = sbytes;
925	}	1056	#endif
		1057
		1058	/* according to source inspection, this is correct, and useful behaviour */
		1059	if (sbytes)
		1060	res = sbytes;
		1061
		1062	# elif defined (__APPLE__)
		1063	off_t sbytes = count;
		1064	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
		1065
		1066	/* according to the manpage, sbytes is always valid */
		1067	if (sbytes)
		1068	res = sbytes;
926		1069
927	# elif __hpux	1070	# elif __hpux
928	res = sendfile (ofd, ifd, offset, count, 0, 0);	1071	res = sendfile (ofd, ifd, offset, count, 0, 0);
929		1072
930	# elif __solaris	1073	# elif __solaris
931	{
932	struct sendfilevec vec;	1074	struct sendfilevec vec;
933	size_t sbytes;	1075	size_t sbytes;
934		1076
935	vec.sfv_fd = ifd;	1077	vec.sfv_fd = ifd;
936	vec.sfv_flag = 0;	1078	vec.sfv_flag = 0;
937	vec.sfv_off = offset;	1079	vec.sfv_off = offset;
938	vec.sfv_len = count;	1080	vec.sfv_len = count;
939		1081
940	res = sendfilev (ofd, &vec, 1, &sbytes);	1082	res = sendfilev (ofd, &vec, 1, &sbytes);
941		1083
942	if (res < 0 && sbytes)	1084	if (res < 0 && sbytes)
943	res = sbytes;	1085	res = sbytes;
944	}
945		1086
946	# endif	1087	# endif
		1088
		1089	#elif defined (_WIN32) && 0
		1090	/* does not work, just for documentation of what would need to be done */
		1091	/* actually, cannot be done like this, as TransmitFile changes the file offset, */
		1092	/* libeio guarantees that the file offset does not change, and windows */
		1093	/* has no way to get an independent handle to the same file description */
		1094	HANDLE h = TO_SOCKET (ifd);
		1095	SetFilePointer (h, offset, 0, FILE_BEGIN);
		1096	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
		1097
947	#else	1098	#else
948	res = -1;	1099	res = -1;
949	errno = ENOSYS;	1100	errno = ENOSYS;
950	#endif	1101	#endif
951		1102
		1103	/* we assume sendfile can copy at least 128mb in one go */
		1104	if (res <= 128 * 1024 * 1024)
		1105	{
		1106	if (res > 0)
		1107	written += res;
		1108
		1109	if (written)
		1110	return written;
		1111
		1112	break;
		1113	}
		1114	else
		1115	{
		1116	/* if we requested more, then probably the kernel was lazy */
		1117	written += res;
		1118	offset += res;
		1119	count -= res;
		1120
		1121	if (!count)
		1122	return written;
		1123	}
		1124	}
		1125
952	if (res < 0	1126	if (res < 0
953	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	1127	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		1128	/* BSDs */
		1129	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
		1130	|| errno == ENOTSUP
		1131	#endif
		1132	|| errno == EOPNOTSUPP /* BSDs */
954	#if __solaris	1133	#if __solaris
955	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	1134	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
956	#endif	1135	#endif
957	)	1136	)
958	)	1137	)
…		…
962		1141
963	res = 0;	1142	res = 0;
964		1143
965	while (count)	1144	while (count)
966	{	1145	{
967	ssize_t cnt;	1146	eio_ssize_t cnt;
968		1147
969	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);	1148	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);
970		1149
971	if (cnt <= 0)	1150	if (cnt <= 0)
972	{	1151	{
…		…
989	}	1168	}
990		1169
991	return res;	1170	return res;
992	}	1171	}
993		1172
		1173	#ifdef PAGESIZE
		1174	# define eio_pagesize() PAGESIZE
		1175	#else
		1176	static intptr_t
		1177	eio_pagesize (void)
		1178	{
		1179	static intptr_t page;
		1180
		1181	if (!page)
		1182	page = sysconf (_SC_PAGESIZE);
		1183
		1184	return page;
		1185	}
		1186	#endif
		1187
		1188	static void
		1189	eio_page_align (void **addr, size_t *length)
		1190	{
		1191	intptr_t mask = eio_pagesize () - 1;
		1192
		1193	/* round down addr */
		1194	intptr_t adj = mask & (intptr_t)*addr;
		1195
		1196	*addr = (void *)((intptr_t)*addr - adj);
		1197	*length += adj;
		1198
		1199	/* round up length */
		1200	*length = (*length + mask) & ~mask;
		1201	}
		1202
		1203	#if !_POSIX_MEMLOCK
		1204	# define eio__mlockall(a) eio_nosyscall()
		1205	#else
		1206
994	static int	1207	static int
		1208	eio__mlockall (int flags)
		1209	{
		1210	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1211	extern int mallopt (int, int);
		1212	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1213	#endif
		1214
		1215	if (EIO_MCL_CURRENT != MCL_CURRENT
		1216	|| EIO_MCL_FUTURE != MCL_FUTURE)
		1217	{
		1218	flags = 0
		1219	| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
		1220	| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
		1221	}
		1222
		1223	return mlockall (flags);
		1224	}
		1225	#endif
		1226
		1227	#if !_POSIX_MEMLOCK_RANGE
		1228	# define eio__mlock(a,b) EIO_ENOSYS ()
		1229	#else
		1230
		1231	static int
		1232	eio__mlock (void *addr, size_t length)
		1233	{
		1234	eio_page_align (&addr, &length);
		1235
		1236	return mlock (addr, length);
		1237	}
		1238
		1239	#endif
		1240
		1241	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1242	# define eio__msync(a,b,c) EIO_ENOSYS ()
		1243	#else
		1244
		1245	static int
		1246	eio__msync (void *mem, size_t len, int flags)
		1247	{
		1248	eio_page_align (&mem, &len);
		1249
		1250	if (EIO_MS_ASYNC != MS_SYNC
		1251	|| EIO_MS_INVALIDATE != MS_INVALIDATE
		1252	|| EIO_MS_SYNC != MS_SYNC)
		1253	{
		1254	flags = 0
		1255	| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
		1256	| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
		1257	| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
		1258	}
		1259
		1260	return msync (mem, len, flags);
		1261	}
		1262
		1263	#endif
		1264
		1265	static int
		1266	eio__mtouch (eio_req *req)
		1267	{
		1268	void *mem = req->ptr2;
		1269	size_t len = req->size;
		1270	int flags = req->int1;
		1271
		1272	eio_page_align (&mem, &len);
		1273
		1274	{
		1275	intptr_t addr = (intptr_t)mem;
		1276	intptr_t end = addr + len;
		1277	intptr_t page = eio_pagesize ();
		1278
		1279	if (addr < end)
		1280	if (flags & EIO_MT_MODIFY) /* modify */
		1281	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1282	else
		1283	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1284	}
		1285
		1286	return 0;
		1287	}
		1288
		1289	/*****************************************************************************/
		1290	/* requests implemented outside eio_execute, because they are so large */
		1291
		1292	static void
		1293	eio__realpath (eio_req *req, etp_worker *self)
		1294	{
		1295	char *rel = req->ptr1;
		1296	char *res;
		1297	char *tmp1, *tmp2;
		1298	#if SYMLOOP_MAX > 32
		1299	int symlinks = SYMLOOP_MAX;
		1300	#else
		1301	int symlinks = 32;
		1302	#endif
		1303
		1304	req->result = -1;
		1305
		1306	errno = EINVAL;
		1307	if (!rel)
		1308	return;
		1309
		1310	errno = ENOENT;
		1311	if (!*rel)
		1312	return;
		1313
		1314	if (!req->ptr2)
		1315	{
		1316	X_LOCK (wrklock);
		1317	req->flags |= EIO_FLAG_PTR2_FREE;
		1318	X_UNLOCK (wrklock);
		1319	req->ptr2 = malloc (PATH_MAX * 3);
		1320
		1321	errno = ENOMEM;
		1322	if (!req->ptr2)
		1323	return;
		1324	}
		1325
		1326	res = req->ptr2;
		1327	tmp1 = res + PATH_MAX;
		1328	tmp2 = tmp1 + PATH_MAX;
		1329
		1330	#if 0 /* disabled, the musl way to do things is just too racy */
		1331	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
		1332	/* on linux we may be able to ask the kernel */
		1333	{
		1334	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
		1335
		1336	if (fd >= 0)
		1337	{
		1338	sprintf (tmp1, "/proc/self/fd/%d", fd);
		1339	req->result = readlink (tmp1, res, PATH_MAX);
		1340	close (fd);
		1341
		1342	/* here we should probably stat the open file and the disk file, to make sure they still match */
		1343
		1344	if (req->result > 0)
		1345	goto done;
		1346	}
		1347	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
		1348	return;
		1349	}
		1350	#endif
		1351	#endif
		1352
		1353	if (*rel != '/')
		1354	{
		1355	if (!getcwd (res, PATH_MAX))
		1356	return;
		1357
		1358	if (res [1]) /* only use if not / */
		1359	res += strlen (res);
		1360	}
		1361
		1362	while (*rel)
		1363	{
		1364	eio_ssize_t len, linklen;
		1365	char *beg = rel;
		1366
		1367	while (*rel && *rel != '/')
		1368	++rel;
		1369
		1370	len = rel - beg;
		1371
		1372	if (!len) /* skip slashes */
		1373	{
		1374	++rel;
		1375	continue;
		1376	}
		1377
		1378	if (beg [0] == '.')
		1379	{
		1380	if (len == 1)
		1381	continue; /* . - nop */
		1382
		1383	if (beg [1] == '.' && len == 2)
		1384	{
		1385	/* .. - back up one component, if possible */
		1386
		1387	while (res != req->ptr2)
		1388	if (*--res == '/')
		1389	break;
		1390
		1391	continue;
		1392	}
		1393	}
		1394
		1395	errno = ENAMETOOLONG;
		1396	if (res + 1 + len + 1 >= tmp1)
		1397	return;
		1398
		1399	/* copy one component */
		1400	*res = '/';
		1401	memcpy (res + 1, beg, len);
		1402
		1403	/* zero-terminate, for readlink */
		1404	res [len + 1] = 0;
		1405
		1406	/* now check if it's a symlink */
		1407	linklen = readlink (req->ptr2, tmp1, PATH_MAX);
		1408
		1409	if (linklen < 0)
		1410	{
		1411	if (errno != EINVAL)
		1412	return;
		1413
		1414	/* it's a normal directory. hopefully */
		1415	res += len + 1;
		1416	}
		1417	else
		1418	{
		1419	/* yay, it was a symlink - build new path in tmp2 */
		1420	int rellen = strlen (rel);
		1421
		1422	errno = ENAMETOOLONG;
		1423	if (linklen + 1 + rellen >= PATH_MAX)
		1424	return;
		1425
		1426	errno = ELOOP;
		1427	if (!--symlinks)
		1428	return;
		1429
		1430	if (*tmp1 == '/')
		1431	res = req->ptr2; /* symlink resolves to an absolute path */
		1432
		1433	/* we need to be careful, as rel might point into tmp2 already */
		1434	memmove (tmp2 + linklen + 1, rel, rellen + 1);
		1435	tmp2 [linklen] = '/';
		1436	memcpy (tmp2, tmp1, linklen);
		1437
		1438	rel = tmp2;
		1439	}
		1440	}
		1441
		1442	/* special case for the lone root path */
		1443	if (res == req->ptr2)
		1444	*res++ = '/';
		1445
		1446	req->result = res - (char *)req->ptr2;
		1447
		1448	done:
		1449	req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */
		1450	}
		1451
		1452	static signed char
995	eio_dent_cmp (const void *a_, const void *b_)	1453	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
996	{	1454	{
997	const eio_dirent *a = (const eio_dirent *)a_;	1455	return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
998	const eio_dirent *b = (const eio_dirent *)b_;	1456	: a->inode < b->inode ? -1
		1457	: a->inode > b->inode ? 1
		1458	: 0;
		1459	}
999		1460
1000	return (int)b->score - (int)a->score ? (int)b->score - (int)a->score	1461	#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
1001	: a->inode < b->inode ? -1 : a->inode > b->inode ? 1 : 0; /* int might be < ino_t */	1462
		1463	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
		1464	#define EIO_SORT_FAST 60 /* when to only use insertion sort */
		1465
		1466	static void
		1467	eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
		1468	{
		1469	unsigned char bits [9 + sizeof (ino_t) * 8];
		1470	unsigned char *bit = bits;
		1471
		1472	assert (CHAR_BIT == 8);
		1473	assert (sizeof (eio_dirent) * 8 < 256);
		1474	assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
		1475	assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */
		1476
		1477	if (size <= EIO_SORT_FAST)
		1478	return;
		1479
		1480	/* first prepare an array of bits to test in our radix sort */
		1481	/* try to take endianness into account, as well as differences in ino_t sizes */
		1482	/* inode_bits must contain all inodes ORed together */
		1483	/* which is used to skip bits that are 0 everywhere, which is very common */
		1484	{
		1485	ino_t endianness;
		1486	int i, j;
		1487
		1488	/* we store the byte offset of byte n into byte n of "endianness" */
		1489	for (i = 0; i < sizeof (ino_t); ++i)
		1490	((unsigned char *)&endianness)[i] = i;
		1491
		1492	*bit++ = 0;
		1493
		1494	for (i = 0; i < sizeof (ino_t); ++i)
		1495	{
		1496	/* shifting off the byte offsets out of "endianness" */
		1497	int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
		1498	endianness >>= 8;
		1499
		1500	for (j = 0; j < 8; ++j)
		1501	if (inode_bits & (((ino_t)1) << (i * 8 + j)))
		1502	*bit++ = offs + j;
		1503	}
		1504
		1505	for (j = 0; j < 8; ++j)
		1506	if (score_bits & (1 << j))
		1507	*bit++ = offsetof (eio_dirent, score) * 8 + j;
		1508	}
		1509
		1510	/* now actually do the sorting (a variant of MSD radix sort) */
		1511	{
		1512	eio_dirent *base_stk [9 + sizeof (ino_t) * 8], *base;
		1513	eio_dirent *end_stk [9 + sizeof (ino_t) * 8], *end;
		1514	unsigned char *bit_stk [9 + sizeof (ino_t) * 8];
		1515	int stk_idx = 0;
		1516
		1517	base_stk [stk_idx] = dents;
		1518	end_stk [stk_idx] = dents + size;
		1519	bit_stk [stk_idx] = bit - 1;
		1520
		1521	do
		1522	{
		1523	base = base_stk [stk_idx];
		1524	end = end_stk [stk_idx];
		1525	bit = bit_stk [stk_idx];
		1526
		1527	for (;;)
		1528	{
		1529	unsigned char O = *bit >> 3;
		1530	unsigned char M = 1 << (*bit & 7);
		1531
		1532	eio_dirent *a = base;
		1533	eio_dirent *b = end;
		1534
		1535	if (b - a < EIO_SORT_CUTOFF)
		1536	break;
		1537
		1538	/* now bit-partition the array on the bit */
		1539	/* this ugly asymmetric loop seems to perform much better than typical */
		1540	/* partition algos found in the literature */
		1541	do
		1542	if (!(((unsigned char *)a)[O] & M))
		1543	++a;
		1544	else if (!(((unsigned char *)--b)[O] & M))
		1545	{
		1546	eio_dirent tmp = *a; *a = *b; *b = tmp;
		1547	++a;
		1548	}
		1549	while (b > a);
		1550
		1551	/* next bit, or stop, if no bits left in this path */
		1552	if (!*--bit)
		1553	break;
		1554
		1555	base_stk [stk_idx] = a;
		1556	end_stk [stk_idx] = end;
		1557	bit_stk [stk_idx] = bit;
		1558	++stk_idx;
		1559
		1560	end = a;
		1561	}
		1562	}
		1563	while (stk_idx--);
		1564	}
		1565	}
		1566
		1567	static void
		1568	eio_dent_insertion_sort (eio_dirent *dents, int size)
		1569	{
		1570	/* first move the smallest element to the front, to act as a sentinel */
		1571	{
		1572	int i;
		1573	eio_dirent *min = dents;
		1574
		1575	/* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
		1576	for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
		1577	if (EIO_DENT_CMP (dents [i], <, *min))
		1578	min = &dents [i];
		1579
		1580	/* swap elements 0 and j (minimum) */
		1581	{
		1582	eio_dirent tmp = *dents; *dents = *min; *min = tmp;
		1583	}
		1584	}
		1585
		1586	/* then do standard insertion sort, assuming that all elements are >= dents [0] */
		1587	{
		1588	eio_dirent *i, *j;
		1589
		1590	for (i = dents + 1; i < dents + size; ++i)
		1591	{
		1592	eio_dirent value = *i;
		1593
		1594	for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
		1595	j [1] = j [0];
		1596
		1597	j [1] = value;
		1598	}
		1599	}
		1600	}
		1601
		1602	static void
		1603	eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)
		1604	{
		1605	if (size <= 1)
		1606	return; /* our insertion sort relies on size > 0 */
		1607
		1608	/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
		1609	/* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
		1610	eio_dent_radix_sort (dents, size, score_bits, inode_bits);
		1611
		1612	/* use an insertion sort at the end, or for small arrays, */
		1613	/* as insertion sort is more efficient for small partitions */
		1614	eio_dent_insertion_sort (dents, size);
1002	}	1615	}
1003		1616
1004	/* read a full directory */	1617	/* read a full directory */
1005	static void	1618	static void
1006	eio__scandir (eio_req *req, etp_worker *self)	1619	eio__scandir (eio_req *req, etp_worker *self)
1007	{	1620	{
1008	DIR *dirp;	1621	DIR *dirp;
1009	EIO_STRUCT_DIRENT *entp;	1622	EIO_STRUCT_DIRENT *entp;
1010	unsigned char *name, *names;	1623	char *name, *names;
1011	int namesalloc = 4096;	1624	int namesalloc = 4096;
1012	int namesoffs = 0;	1625	int namesoffs = 0;
1013	int flags = req->int1;	1626	int flags = req->int1;
1014	eio_dirent *dents = 0;	1627	eio_dirent *dents = 0;
1015	int dentalloc = 128;	1628	int dentalloc = 128;
1016	int dentoffs = 0;	1629	int dentoffs = 0;
		1630	ino_t inode_bits = 0;
1017		1631
1018	req->result = -1;	1632	req->result = -1;
1019		1633
1020	if (!(flags & EIO_READDIR_DENTS))	1634	if (!(flags & EIO_READDIR_DENTS))
1021	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);	1635	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
1022		1636
1023	X_LOCK (wrklock);	1637	X_LOCK (wrklock);
1024	/* the corresponding closedir is in ETP_WORKER_CLEAR */	1638	/* the corresponding closedir is in ETP_WORKER_CLEAR */
1025	self->dirp = dirp = opendir (req->ptr1);	1639	self->dirp = dirp = opendir (req->ptr1);
		1640
		1641	if (req->flags & EIO_FLAG_PTR1_FREE)
		1642	free (req->ptr1);
		1643
1026	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;	1644	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
1027	req->ptr1 = names = malloc (namesalloc);
1028	req->ptr2 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;	1645	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
		1646	req->ptr2 = names = malloc (namesalloc);
1029	X_UNLOCK (wrklock);	1647	X_UNLOCK (wrklock);
1030		1648
1031	if (dirp && names && (!flags || dents))	1649	if (dirp && names && (!flags || dents))
1032	for (;;)	1650	for (;;)
1033	{	1651	{
…		…
1041		1659
1042	/* sort etc. */	1660	/* sort etc. */
1043	req->int1 = flags;	1661	req->int1 = flags;
1044	req->result = dentoffs;	1662	req->result = dentoffs;
1045		1663
1046	if (dents)
1047	{
1048	eio_dirent *ent = dents + dentoffs;
1049
1050	while (ent > dents)
1051	(--ent)->name = names + (size_t)ent->name;
1052	}
1053
1054	if (flags & EIO_READDIR_STAT_ORDER	1664	if (flags & EIO_READDIR_STAT_ORDER)
1055	|| !(~flags & (EIO_READDIR_DIRS_FIRST | EIO_READDIR_FOUND_UNKNOWN)))	1665	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
1056	{
1057	/* pray your qsort doesn't use quicksort */
1058	qsort (dents, dentoffs, sizeof (*dents), eio_dent_cmp); /* score depends of DIRS_FIRST */
1059	}
1060	else if (flags & EIO_READDIR_DIRS_FIRST)	1666	else if (flags & EIO_READDIR_DIRS_FIRST)
		1667	if (flags & EIO_READDIR_FOUND_UNKNOWN)
		1668	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
		1669	else
1061	{	1670	{
1062	/* in this case, all is known, and we just put dirs first and sort them */	1671	/* in this case, all is known, and we just put dirs first and sort them */
1063	eio_dirent *ent = dents + dentoffs;	1672	eio_dirent *oth = dents + dentoffs;
1064	eio_dirent *dir = dents;	1673	eio_dirent *dir = dents;
1065		1674
		1675	/* now partition dirs to the front, and non-dirs to the back */
		1676	/* by walking from both sides and swapping if necessary */
1066	while (ent > dir)	1677	while (oth > dir)
1067	{	1678	{
1068	if (dir->type == DT_DIR)	1679	if (dir->type == EIO_DT_DIR)
1069	++dir;	1680	++dir;
1070	else
1071	{
1072	--ent;
1073
1074	if (ent->type == DT_DIR)	1681	else if ((--oth)->type == EIO_DT_DIR)
1075	{	1682	{
1076	eio_dirent tmp = *dir;	1683	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
1077	*dir = *ent;
1078	*ent = tmp;
1079		1684
1080	++dir;	1685	++dir;
1081	}	1686	}
1082	}	1687	}
		1688
		1689	/* now sort the dirs only (dirs all have the same score) */
		1690	eio_dent_sort (dents, dir - dents, 0, inode_bits);
1083	}	1691	}
1084
1085	/* now sort the dirs only */
1086	qsort (dents, dir - dents, sizeof (*dents), eio_dent_cmp);
1087	}
1088
1089	/* only provide the names array unless DENTS is specified */
1090	if (!(flags & EIO_READDIR_DENTS))
1091	{
1092	X_LOCK (wrklock);
1093	assert (!dents);
1094	req->ptr1 = 0;
1095	req->ptr2 = names;
1096	X_UNLOCK (wrklock);
1097	}
1098		1692
1099	break;	1693	break;
1100	}	1694	}
1101		1695
1102	/* now add the entry to our list(s) */	1696	/* now add the entry to our list(s) */
…		…
1105	/* skip . and .. entries */	1699	/* skip . and .. entries */
1106	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1700	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1107	{	1701	{
1108	int len = D_NAMLEN (entp) + 1;	1702	int len = D_NAMLEN (entp) + 1;
1109		1703
1110	while (expect_false (namesoffs + len > namesalloc))	1704	while (ecb_expect_false (namesoffs + len > namesalloc))
1111	{	1705	{
1112	namesalloc *= 2;	1706	namesalloc *= 2;
1113	X_LOCK (wrklock);	1707	X_LOCK (wrklock);
1114	req->ptr1 = names = realloc (names, namesalloc);	1708	req->ptr2 = names = realloc (names, namesalloc);
1115	X_UNLOCK (wrklock);	1709	X_UNLOCK (wrklock);
1116		1710
1117	if (!names)	1711	if (!names)
1118	break;	1712	break;
1119	}	1713	}
…		…
1122		1716
1123	if (dents)	1717	if (dents)
1124	{	1718	{
1125	struct eio_dirent *ent;	1719	struct eio_dirent *ent;
1126		1720
1127	if (expect_false (dentoffs == dentalloc))	1721	if (ecb_expect_false (dentoffs == dentalloc))
1128	{	1722	{
1129	dentalloc *= 2;	1723	dentalloc *= 2;
1130	X_LOCK (wrklock);	1724	X_LOCK (wrklock);
1131	req->ptr2 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));	1725	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
1132	X_UNLOCK (wrklock);	1726	X_UNLOCK (wrklock);
1133		1727
1134	if (!dents)	1728	if (!dents)
1135	break;	1729	break;
1136	}	1730	}
1137		1731
1138	ent = dents + dentoffs;	1732	ent = dents + dentoffs;
1139		1733
1140	ent->name = (char *)(size_t)namesoffs; /* rather dirtily we store the offset in the pointer */	1734	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
1141	ent->namelen = len - 1;	1735	ent->namelen = len - 1;
1142	ent->inode = D_INO (entp);	1736	ent->inode = D_INO (entp);
		1737
		1738	inode_bits |= ent->inode;
1143		1739
1144	switch (D_TYPE (entp))	1740	switch (D_TYPE (entp))
1145	{	1741	{
1146	default:	1742	default:
1147	ent->type = EIO_DT_UNKNOWN;	1743	ent->type = EIO_DT_UNKNOWN;
…		…
1190	#ifdef DT_WHT	1786	#ifdef DT_WHT
1191	case DT_WHT: ent->type = EIO_DT_WHT; break;	1787	case DT_WHT: ent->type = EIO_DT_WHT; break;
1192	#endif	1788	#endif
1193	}	1789	}
1194		1790
1195	ent->score = 0;	1791	ent->score = 7;
1196		1792
1197	if (flags & EIO_READDIR_DIRS_FIRST)	1793	if (flags & EIO_READDIR_DIRS_FIRST)
1198	{	1794	{
1199	if (ent->type == EIO_DT_UNKNOWN)	1795	if (ent->type == EIO_DT_UNKNOWN)
1200	{	1796	{
1201	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */	1797	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
1202	ent->score = 98;	1798	ent->score = 1;
1203	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */	1799	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
1204	ent->score = len <= 2 ? len + 60 : len <= 4 ? 50 : len <= 7 ? 40 : 10; /* shorter == more likely dir, but avoid too many classes */	1800	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1205	}	1801	}
1206	else if (ent->type == EIO_DT_DIR)	1802	else if (ent->type == EIO_DT_DIR)
1207	ent->score = 100;	1803	ent->score = 0;
1208	}	1804	}
1209	}	1805	}
1210		1806
1211	namesoffs += len;	1807	namesoffs += len;
1212	++dentoffs;	1808	++dentoffs;
1213	}	1809	}
		1810
		1811	if (EIO_CANCELLED (req))
		1812	{
		1813	errno = ECANCELED;
		1814	break;
		1815	}
1214	}	1816	}
1215	else
1216	req->result = -1;
1217	}
1218
1219	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
1220	# undef msync
1221	# define msync(a,b,c) ((errno = ENOSYS), -1)
1222	#endif
1223
1224	int
1225	eio__mtouch (void *mem, size_t len, int flags)
1226	{
1227	intptr_t addr = (intptr_t)mem;
1228	intptr_t end = addr + len;
1229	#ifdef PAGESIZE
1230	const intptr_t page = PAGESIZE;
1231	#else
1232	static intptr_t page;
1233
1234	if (!page)
1235	page = sysconf (_SC_PAGESIZE);
1236	#endif
1237
1238	addr &= ~(page - 1); /* assume page size is always a power of two */
1239
1240	if (addr < end)
1241	if (flags) /* modify */
1242	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len);
1243	else
1244	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len);
1245
1246	return 0;
1247	}	1817	}
1248		1818
1249	/*****************************************************************************/	1819	/*****************************************************************************/
1250		1820
1251	#define ALLOC(len) \	1821	#define ALLOC(len) \
…		…
1266	X_THREAD_PROC (etp_proc)	1836	X_THREAD_PROC (etp_proc)
1267	{	1837	{
1268	ETP_REQ *req;	1838	ETP_REQ *req;
1269	struct timespec ts;	1839	struct timespec ts;
1270	etp_worker *self = (etp_worker *)thr_arg;	1840	etp_worker *self = (etp_worker *)thr_arg;
		1841	int timeout;
1271		1842
1272	/* try to distribute timeouts somewhat randomly */	1843	/* try to distribute timeouts somewhat evenly */
1273	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1844	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
1274		1845
1275	for (;;)	1846	for (;;)
1276	{	1847	{
		1848	ts.tv_sec = 0;
		1849
1277	X_LOCK (reqlock);	1850	X_LOCK (reqlock);
1278		1851
1279	for (;;)	1852	for (;;)
1280	{	1853	{
1281	self->req = req = reqq_shift (&req_queue);	1854	self->req = req = reqq_shift (&req_queue);
1282		1855
1283	if (req)	1856	if (req)
1284	break;	1857	break;
1285		1858
		1859	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
		1860	{
		1861	X_UNLOCK (reqlock);
		1862	X_LOCK (wrklock);
		1863	--started;
		1864	X_UNLOCK (wrklock);
		1865	goto quit;
		1866	}
		1867
1286	++idle;	1868	++idle;
1287		1869
1288	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1870	if (idle <= max_idle)
1289	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1871	/* we are allowed to idle, so do so without any timeout */
		1872	X_COND_WAIT (reqwait, reqlock);
		1873	else
1290	{	1874	{
1291	if (idle > max_idle)	1875	/* initialise timeout once */
1292	{	1876	if (!ts.tv_sec)
1293	--idle;	1877	ts.tv_sec = time (0) + idle_timeout;
1294	X_UNLOCK (reqlock);
1295	X_LOCK (wrklock);
1296	--started;
1297	X_UNLOCK (wrklock);
1298	goto quit;
1299	}
1300		1878
1301	/* we are allowed to idle, so do so without any timeout */
1302	X_COND_WAIT (reqwait, reqlock);	1879	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
		1880	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
1303	}	1881	}
1304		1882
1305	--idle;	1883	--idle;
1306	}	1884	}
1307		1885
…		…
1310	X_UNLOCK (reqlock);	1888	X_UNLOCK (reqlock);
1311		1889
1312	if (req->type < 0)	1890	if (req->type < 0)
1313	goto quit;	1891	goto quit;
1314		1892
1315	if (!EIO_CANCELLED (req))
1316	ETP_EXECUTE (self, req);	1893	ETP_EXECUTE (self, req);
1317		1894
1318	X_LOCK (reslock);	1895	X_LOCK (reslock);
1319		1896
1320	++npending;	1897	++npending;
1321		1898
…		…
1336	return 0;	1913	return 0;
1337	}	1914	}
1338		1915
1339	/*****************************************************************************/	1916	/*****************************************************************************/
1340		1917
		1918	int ecb_cold
1341	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1919	eio_init (void (*want_poll)(void), void (*done_poll)(void))
1342	{	1920	{
1343	return etp_init (want_poll, done_poll);	1921	return etp_init (want_poll, done_poll);
1344	}	1922	}
1345		1923
		1924	ecb_inline void
1346	static void eio_api_destroy (eio_req *req)	1925	eio_api_destroy (eio_req *req)
1347	{	1926	{
1348	free (req);	1927	free (req);
1349	}	1928	}
1350		1929
1351	#define REQ(rtype) \	1930	#define REQ(rtype) \
…		…
1370	{ \	1949	{ \
1371	eio_api_destroy (req); \	1950	eio_api_destroy (req); \
1372	return 0; \	1951	return 0; \
1373	}	1952	}
1374		1953
		1954	static void
1375	static void eio_execute (etp_worker *self, eio_req *req)	1955	eio_execute (etp_worker *self, eio_req *req)
1376	{	1956	{
1377	errno = 0;	1957	if (ecb_expect_false (EIO_CANCELLED (req)))
		1958	{
		1959	req->result = -1;
		1960	req->errorno = ECANCELED;
		1961	return;
		1962	}
1378		1963
1379	switch (req->type)	1964	switch (req->type)
1380	{	1965	{
1381	case EIO_READ: ALLOC (req->size);	1966	case EIO_READ: ALLOC (req->size);
1382	req->result = req->offs >= 0	1967	req->result = req->offs >= 0
…		…
1394	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1979	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1395	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;	1980	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
1396	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1981	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1397	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;	1982	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
1398		1983
		1984	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		1985	req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		1986	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		1987	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		1988
1399	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;	1989	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
1400	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;	1990	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
1401	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;	1991	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
1402	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;	1992	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
1403	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;	1993	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
…		…
1410	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;	2000	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
1411	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;	2001	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
1412	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;	2002	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
1413	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;	2003	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
1414	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;	2004	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
1415	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->int3); break;	2005	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
1416		2006
		2007	case EIO_REALPATH: eio__realpath (req, self); break;
		2008
1417	case EIO_READLINK: ALLOC (NAME_MAX);	2009	case EIO_READLINK: ALLOC (PATH_MAX);
1418	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;	2010	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
1419		2011
1420	case EIO_SYNC: req->result = 0; sync (); break;	2012	case EIO_SYNC: req->result = 0; sync (); break;
1421	case EIO_FSYNC: req->result = fsync (req->int1); break;	2013	case EIO_FSYNC: req->result = fsync (req->int1); break;
1422	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;	2014	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
1423	case EIO_MSYNC: req->result = msync (req->ptr2, req->size, req->int1); break;	2015	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
		2016	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
1424	case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break;	2017	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
		2018	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
1425	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;	2019	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		2020	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
1426		2021
1427	case EIO_READDIR: eio__scandir (req, self); break;	2022	case EIO_READDIR: eio__scandir (req, self); break;
1428		2023
1429	case EIO_BUSY:	2024	case EIO_BUSY:
1430	#ifdef _WIN32	2025	#ifdef _WIN32
1431	Sleep (req->nv1 * 1000.);	2026	Sleep (req->nv1 * 1e3);
1432	#else	2027	#else
1433	{	2028	{
1434	struct timeval tv;	2029	struct timeval tv;
1435		2030
1436	tv.tv_sec = req->nv1;	2031	tv.tv_sec = req->nv1;
1437	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;	2032	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6;
1438		2033
1439	req->result = select (0, 0, 0, 0, &tv);	2034	req->result = select (0, 0, 0, 0, &tv);
1440	}	2035	}
1441	#endif	2036	#endif
1442	break;	2037	break;
…		…
1457	times = tv;	2052	times = tv;
1458	}	2053	}
1459	else	2054	else
1460	times = 0;	2055	times = 0;
1461		2056
1462
1463	req->result = req->type == EIO_FUTIME	2057	req->result = req->type == EIO_FUTIME
1464	? futimes (req->int1, times)	2058	? futimes (req->int1, times)
1465	: utimes (req->ptr1, times);	2059	: utimes (req->ptr1, times);
1466	}	2060	}
1467	break;	2061	break;
…		…
1472	case EIO_NOP:	2066	case EIO_NOP:
1473	req->result = 0;	2067	req->result = 0;
1474	break;	2068	break;
1475		2069
1476	case EIO_CUSTOM:	2070	case EIO_CUSTOM:
1477	((void (*)(eio_req *))req->feed) (req);	2071	req->feed (req);
1478	break;	2072	break;
1479		2073
1480	default:	2074	default:
		2075	errno = ENOSYS;
1481	req->result = -1;	2076	req->result = -1;
1482	break;	2077	break;
1483	}	2078	}
1484		2079
1485	req->errorno = errno;	2080	req->errorno = errno;
…		…
1515	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)	2110	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
1516	{	2111	{
1517	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;	2112	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
1518	}	2113	}
1519		2114
		2115	eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data)
		2116	{
		2117	REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND;
		2118	}
		2119
		2120	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
		2121	{
		2122	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
		2123	}
		2124
1520	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)	2125	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
1521	{	2126	{
1522	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;	2127	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
1523	}	2128	}
1524		2129
		2130	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
		2131	{
		2132	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
		2133	}
		2134
1525	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)	2135	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1526	{	2136	{
1527	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;	2137	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1528	}	2138	}
1529		2139
…		…
1550	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)	2160	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
1551	{	2161	{
1552	REQ (EIO_FSTAT); req->int1 = fd; SEND;	2162	REQ (EIO_FSTAT); req->int1 = fd; SEND;
1553	}	2163	}
1554		2164
		2165	eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data)
		2166	{
		2167	REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
		2168	}
		2169
1555	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)	2170	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
1556	{	2171	{
1557	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;	2172	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
1558	}	2173	}
1559		2174
…		…
1565	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)	2180	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
1566	{	2181	{
1567	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;	2182	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1568	}	2183	}
1569		2184
1570	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)	2185	eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1571	{	2186	{
1572	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2187	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1573	}	2188	}
1574		2189
1575	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)	2190	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
…		…
1595	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)	2210	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
1596	{	2211	{
1597	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;	2212	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1598	}	2213	}
1599		2214
1600	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)	2215	eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1601	{	2216	{
1602	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2217	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1603	}	2218	}
1604		2219
1605	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)	2220	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
…		…
1621	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)	2236	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
1622	{	2237	{
1623	return eio__1path (EIO_READLINK, path, pri, cb, data);	2238	return eio__1path (EIO_READLINK, path, pri, cb, data);
1624	}	2239	}
1625		2240
		2241	eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
		2242	{
		2243	return eio__1path (EIO_REALPATH, path, pri, cb, data);
		2244	}
		2245
1626	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)	2246	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
1627	{	2247	{
1628	return eio__1path (EIO_STAT, path, pri, cb, data);	2248	return eio__1path (EIO_STAT, path, pri, cb, data);
1629	}	2249	}
1630		2250
1631	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)	2251	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
1632	{	2252	{
1633	return eio__1path (EIO_LSTAT, path, pri, cb, data);	2253	return eio__1path (EIO_LSTAT, path, pri, cb, data);
1634	}	2254	}
1635		2255
		2256	eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data)
		2257	{
		2258	return eio__1path (EIO_STATVFS, path, pri, cb, data);
		2259	}
		2260
1636	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)	2261	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
1637	{	2262	{
1638	return eio__1path (EIO_UNLINK, path, pri, cb, data);	2263	return eio__1path (EIO_UNLINK, path, pri, cb, data);
1639	}	2264	}
1640		2265
…		…
1648	REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;	2273	REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
1649	}	2274	}
1650		2275
1651	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)	2276	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1652	{	2277	{
1653	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND;	2278	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND;
1654	}	2279	}
1655		2280
1656	static eio_req *	2281	static eio_req *
1657	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)	2282	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1658	{	2283	{
…		…
1682	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)	2307	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1683	{	2308	{
1684	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);	2309	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
1685	}	2310	}
1686		2311
1687	eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data)	2312	eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
1688	{	2313	{
1689	REQ (EIO_CUSTOM); req->feed = (void (*)(eio_req *))execute; SEND;	2314	REQ (EIO_CUSTOM); req->feed = execute; SEND;
1690	}	2315	}
1691		2316
1692	#endif	2317	#endif
1693		2318
1694	eio_req *eio_grp (eio_cb cb, void *data)	2319	eio_req *eio_grp (eio_cb cb, void *data)
…		…
1703	#undef SEND	2328	#undef SEND
1704		2329
1705	/*****************************************************************************/	2330	/*****************************************************************************/
1706	/* grp functions */	2331	/* grp functions */
1707		2332
		2333	void
1708	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	2334	eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1709	{	2335	{
1710	grp->int2 = limit;	2336	grp->int2 = limit;
1711	grp->feed = feed;	2337	grp->feed = feed;
1712		2338
1713	grp_try_feed (grp);	2339	grp_try_feed (grp);
1714	}	2340	}
1715		2341
		2342	void
1716	void eio_grp_limit (eio_req *grp, int limit)	2343	eio_grp_limit (eio_req *grp, int limit)
1717	{	2344	{
1718	grp->int2 = limit;	2345	grp->int2 = limit;
1719		2346
1720	grp_try_feed (grp);	2347	grp_try_feed (grp);
1721	}	2348	}
1722		2349
		2350	void
1723	void eio_grp_add (eio_req *grp, eio_req *req)	2351	eio_grp_add (eio_req *grp, eio_req *req)
1724	{	2352	{
1725	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2353	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
1726		2354
1727	grp->flags |= EIO_FLAG_GROUPADD;	2355	grp->flags |= EIO_FLAG_GROUPADD;
1728		2356
…		…
1739	}	2367	}
1740		2368
1741	/*****************************************************************************/	2369	/*****************************************************************************/
1742	/* misc garbage */	2370	/* misc garbage */
1743		2371
		2372	eio_ssize_t
1744	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)	2373	eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
1745	{	2374	{
1746	etp_worker wrk;	2375	etp_worker wrk;
		2376	eio_ssize_t ret;
1747		2377
1748	wrk.dbuf = 0;	2378	wrk.dbuf = 0;
1749		2379
1750	eio__sendfile (ofd, ifd, offset, count, &wrk);	2380	ret = eio__sendfile (ofd, ifd, offset, count, &wrk);
1751		2381
1752	if (wrk.dbuf)	2382	if (wrk.dbuf)
1753	free (wrk.dbuf);	2383	free (wrk.dbuf);
1754	}
1755		2384
		2385	return ret;
		2386	}
		2387

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