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Comparing libeio/eio.c (file contents):
Revision 1.33 by root, Sat Jun 6 19:44:17 2009 UTC vs.
Revision 1.93 by root, Mon Jul 18 01:27:03 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	/* 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
58	#ifndef EIO_FINISH	78	#ifndef EIO_FINISH
59	# 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
60	#endif	80	#endif
61		81
62	#ifndef EIO_DESTROY	82	#ifndef EIO_DESTROY
…		…
65		85
66	#ifndef EIO_FEED	86	#ifndef EIO_FEED
67	# 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)
68	#endif	88	#endif
69		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
70	#ifdef _WIN32	101	#ifdef _WIN32
71		102
72	/*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 dup(fd) _dup (fd)
		117	#define dup2(fd1,fd2) _dup2 (fd1, fd2)
		118
		119	#define fchmod(fd,mode) EIO_ENOSYS ()
		120	#define chown(path,uid,gid) EIO_ENOSYS ()
		121	#define fchown(fd,uid,gid) EIO_ENOSYS ()
		122	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
		123	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
		124	#define mknod(path,mode,dev) EIO_ENOSYS ()
		125	#define sync() EIO_ENOSYS ()
		126	#define readlink(path,buf,s) EIO_ENOSYS ()
		127	#define statvfs(path,buf) EIO_ENOSYS ()
		128	#define fstatvfs(fd,buf) EIO_ENOSYS ()
		129
		130	/* we could even stat and see if it exists */
		131	static int
		132	symlink (const char *old, const char *neu)
		133	{
		134	#if WINVER >= 0x0600
		135	if (CreateSymbolicLink (neu, old, 1))
		136	return 0;
		137
		138	if (CreateSymbolicLink (neu, old, 0))
		139	return 0;
		140	#endif
		141
		142	return EIO_ERRNO (ENOENT, -1);
		143	}
		144
		145	/* POSIX API only */
		146	#define CreateHardLink(neu,old,flags) 0
		147	#define CreateSymbolicLink(neu,old,flags) 0
		148
		149	struct statvfs
		150	{
		151	int dummy;
		152	};
		153
		154	#define DT_DIR EIO_DT_DIR
		155	#define DT_REG EIO_DT_REG
		156	#define D_NAME(entp) entp.cFileName
		157	#define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG)
		158
73	#else	159	#else
74		160
75	# include "config.h"
76	# include <sys/time.h>	161	#include <sys/time.h>
77	# include <sys/select.h>	162	#include <sys/select.h>
		163	#include <sys/statvfs.h>
78	# include <unistd.h>	164	#include <unistd.h>
79	# include <utime.h>	165	#include <utime.h>
80	# include <signal.h>	166	#include <signal.h>
81	# include <dirent.h>	167	#include <dirent.h>
82		168
		169	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		170	#include <sys/mman.h>
		171	#endif
		172
		173	#define D_NAME(entp) entp->d_name
		174
83	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */	175	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
84	# if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)	176	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
85	# define _DIRENT_HAVE_D_TYPE /* sigh */	177	#define _DIRENT_HAVE_D_TYPE /* sigh */
86	# define D_INO(de) (de)->d_fileno	178	#define D_INO(de) (de)->d_fileno
87	# define D_NAMLEN(de) (de)->d_namlen	179	#define D_NAMLEN(de) (de)->d_namlen
88	# elif defined(__linux) || defined(d_ino) || _XOPEN_SOURCE >= 600	180	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
89	# define D_INO(de) (de)->d_ino	181	#define D_INO(de) (de)->d_ino
90	# endif	182	#endif
91		183
92	#ifdef _D_EXACT_NAMLEN	184	#ifdef _D_EXACT_NAMLEN
93	# undef D_NAMLEN	185	#undef D_NAMLEN
94	# define D_NAMLEN(de) _D_EXACT_NAMLEN (de)	186	#define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
95	#endif	187	#endif
96		188
97	# ifdef _DIRENT_HAVE_D_TYPE	189	#ifdef _DIRENT_HAVE_D_TYPE
98	# define D_TYPE(de) (de)->d_type	190	#define D_TYPE(de) (de)->d_type
99	# endif	191	#endif
100		192
101	# ifndef EIO_STRUCT_DIRENT	193	#ifndef EIO_STRUCT_DIRENT
102	# define EIO_STRUCT_DIRENT struct dirent	194	#define EIO_STRUCT_DIRENT struct dirent
103	# endif	195	#endif
104		196
105	#endif	197	#endif
106		198
107	#if HAVE_SENDFILE	199	#if HAVE_SENDFILE
108	# if __linux	200	# if __linux
109	# include <sys/sendfile.h>	201	# include <sys/sendfile.h>
110	# elif __freebsd	202	# elif __FreeBSD__ || defined __APPLE__
111	# include <sys/socket.h>	203	# include <sys/socket.h>
112	# include <sys/uio.h>	204	# include <sys/uio.h>
113	# elif __hpux	205	# elif __hpux
114	# include <sys/socket.h>	206	# include <sys/socket.h>
115	# elif __solaris /* not yet */	207	# elif __solaris
116	# include <sys/sendfile.h>	208	# include <sys/sendfile.h>
117	# else	209	# else
118	# error sendfile support requested but not available	210	# error sendfile support requested but not available
119	# endif	211	# endif
120	#endif	212	#endif
…		…
124	#endif	216	#endif
125	#ifndef D_INO	217	#ifndef D_INO
126	# define D_INO(de) 0	218	# define D_INO(de) 0
127	#endif	219	#endif
128	#ifndef D_NAMLEN	220	#ifndef D_NAMLEN
129	# define D_NAMLEN(de) strlen ((de)->d_name)	221	# define D_NAMLEN(entp) strlen (D_NAME (entp))
130	#endif	222	#endif
131
132	/* number of seconds after which an idle threads exit */
133	#define IDLE_TIMEOUT 10
134		223
135	/* used for struct dirent, AIX doesn't provide it */	224	/* used for struct dirent, AIX doesn't provide it */
136	#ifndef NAME_MAX	225	#ifndef NAME_MAX
137	# define NAME_MAX 4096	226	# define NAME_MAX 4096
		227	#endif
		228
		229	/* used for readlink etc. */
		230	#ifndef PATH_MAX
		231	# define PATH_MAX 4096
138	#endif	232	#endif
139		233
140	/* buffer size for various temporary buffers */	234	/* buffer size for various temporary buffers */
141	#define EIO_BUFSIZE 65536	235	#define EIO_BUFSIZE 65536
142		236
…		…
149	if (!eio_buf) \	243	if (!eio_buf) \
150	return -1;	244	return -1;
151		245
152	#define EIO_TICKS ((1000000 + 1023) >> 10)	246	#define EIO_TICKS ((1000000 + 1023) >> 10)
153		247
154	/*****************************************************************************/
155
156	#if __GNUC__ >= 3
157	# define expect(expr,value) __builtin_expect ((expr),(value))
158	#else
159	# define expect(expr,value) (expr)
160	#endif
161
162	#define expect_false(expr) expect ((expr) != 0, 0)
163	#define expect_true(expr) expect ((expr) != 0, 1)
164
165	/*****************************************************************************/
166
167	#define ETP_PRI_MIN EIO_PRI_MIN	248	#define ETP_PRI_MIN EIO_PRI_MIN
168	#define ETP_PRI_MAX EIO_PRI_MAX	249	#define ETP_PRI_MAX EIO_PRI_MAX
169		250
170	struct etp_worker;	251	struct etp_worker;
171		252
…		…
179	#define ETP_WORKER_CLEAR(req) \	260	#define ETP_WORKER_CLEAR(req) \
180	if (wrk->dbuf) \	261	if (wrk->dbuf) \
181	{ \	262	{ \
182	free (wrk->dbuf); \	263	free (wrk->dbuf); \
183	wrk->dbuf = 0; \	264	wrk->dbuf = 0; \
184	} \
185	\
186	if (wrk->dirp) \
187	{ \
188	closedir (wrk->dirp); \
189	wrk->dirp = 0; \
190	}	265	}
191		266
192	#define ETP_WORKER_COMMON \	267	#define ETP_WORKER_COMMON \
193	void *dbuf; \	268	void *dbuf;
194	DIR *dirp;
195		269
196	/*****************************************************************************/	270	/*****************************************************************************/
197		271
198	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)	272	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
199		273
200	/* calculcate time difference in ~1/EIO_TICKS of a second */	274	/* calculate time difference in ~1/EIO_TICKS of a second */
		275	ecb_inline int
201	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	276	tvdiff (struct timeval *tv1, struct timeval *tv2)
202	{	277	{
203	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	278	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
204	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);	279	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
205	}	280	}
206		281
…		…
213	static unsigned int max_poll_reqs; /* reslock */	288	static unsigned int max_poll_reqs; /* reslock */
214		289
215	static volatile unsigned int nreqs; /* reqlock */	290	static volatile unsigned int nreqs; /* reqlock */
216	static volatile unsigned int nready; /* reqlock */	291	static volatile unsigned int nready; /* reqlock */
217	static volatile unsigned int npending; /* reqlock */	292	static volatile unsigned int npending; /* reqlock */
218	static volatile unsigned int max_idle = 4;	293	static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
		294	static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
219		295
220	static mutex_t wrklock = X_MUTEX_INIT;	296	static xmutex_t wrklock;
221	static mutex_t reslock = X_MUTEX_INIT;	297	static xmutex_t reslock;
222	static mutex_t reqlock = X_MUTEX_INIT;	298	static xmutex_t reqlock;
223	static cond_t reqwait = X_COND_INIT;	299	static xcond_t reqwait;
224		300
225	#if !HAVE_PREADWRITE	301	#if !HAVE_PREADWRITE
226	/*	302	/*
227	* make our pread/pwrite emulation safe against themselves, but not against	303	* make our pread/pwrite emulation safe against themselves, but not against
228	* normal read/write by using a mutex. slows down execution a lot,	304	* normal read/write by using a mutex. slows down execution a lot,
229	* but that's your problem, not mine.	305	* but that's your problem, not mine.
230	*/	306	*/
231	static mutex_t preadwritelock = X_MUTEX_INIT;	307	static xmutex_t preadwritelock;
232	#endif	308	#endif
233		309
234	typedef struct etp_worker	310	typedef struct etp_worker
235	{	311	{
236	/* locked by wrklock */	312	/* locked by wrklock */
237	struct etp_worker *prev, *next;	313	struct etp_worker *prev, *next;
238		314
239	thread_t tid;	315	xthread_t tid;
240		316
241	/* locked by reslock, reqlock or wrklock */	317	/* locked by reslock, reqlock or wrklock */
242	ETP_REQ *req; /* currently processed request */	318	ETP_REQ *req; /* currently processed request */
243		319
244	ETP_WORKER_COMMON	320	ETP_WORKER_COMMON
245	} etp_worker;	321	} etp_worker;
246		322
247	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */	323	static etp_worker wrk_first; /* NOT etp */
248		324
249	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)	325	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
250	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)	326	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
251		327
252	/* worker threads management */	328	/* worker threads management */
253		329
		330	static void ecb_cold
254	static void etp_worker_clear (etp_worker *wrk)	331	etp_worker_clear (etp_worker *wrk)
255	{	332	{
256	ETP_WORKER_CLEAR (wrk);	333	ETP_WORKER_CLEAR (wrk);
257	}	334	}
258		335
		336	static void ecb_cold
259	static void etp_worker_free (etp_worker *wrk)	337	etp_worker_free (etp_worker *wrk)
260	{	338	{
261	wrk->next->prev = wrk->prev;	339	wrk->next->prev = wrk->prev;
262	wrk->prev->next = wrk->next;	340	wrk->prev->next = wrk->next;
263		341
264	free (wrk);	342	free (wrk);
265	}	343	}
266		344
267	static unsigned int etp_nreqs (void)	345	static unsigned int
		346	etp_nreqs (void)
268	{	347	{
269	int retval;	348	int retval;
270	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	349	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
271	retval = nreqs;	350	retval = nreqs;
272	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	351	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
273	return retval;	352	return retval;
274	}	353	}
275		354
276	static unsigned int etp_nready (void)	355	static unsigned int
		356	etp_nready (void)
277	{	357	{
278	unsigned int retval;	358	unsigned int retval;
279		359
280	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	360	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
281	retval = nready;	361	retval = nready;
282	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	362	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
283		363
284	return retval;	364	return retval;
285	}	365	}
286		366
287	static unsigned int etp_npending (void)	367	static unsigned int
		368	etp_npending (void)
288	{	369	{
289	unsigned int retval;	370	unsigned int retval;
290		371
291	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	372	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
292	retval = npending;	373	retval = npending;
293	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	374	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
294		375
295	return retval;	376	return retval;
296	}	377	}
297		378
298	static unsigned int etp_nthreads (void)	379	static unsigned int
		380	etp_nthreads (void)
299	{	381	{
300	unsigned int retval;	382	unsigned int retval;
301		383
302	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	384	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
303	retval = started;	385	retval = started;
…		…
317	} etp_reqq;	399	} etp_reqq;
318		400
319	static etp_reqq req_queue;	401	static etp_reqq req_queue;
320	static etp_reqq res_queue;	402	static etp_reqq res_queue;
321		403
		404	static void ecb_noinline ecb_cold
		405	reqq_init (etp_reqq *q)
		406	{
		407	int pri;
		408
		409	for (pri = 0; pri < ETP_NUM_PRI; ++pri)
		410	q->qs[pri] = q->qe[pri] = 0;
		411
		412	q->size = 0;
		413	}
		414
		415	static int ecb_noinline
322	static int reqq_push (etp_reqq *q, ETP_REQ *req)	416	reqq_push (etp_reqq *q, ETP_REQ *req)
323	{	417	{
324	int pri = req->pri;	418	int pri = req->pri;
325	req->next = 0;	419	req->next = 0;
326		420
327	if (q->qe[pri])	421	if (q->qe[pri])
…		…
333	q->qe[pri] = q->qs[pri] = req;	427	q->qe[pri] = q->qs[pri] = req;
334		428
335	return q->size++;	429	return q->size++;
336	}	430	}
337		431
		432	static ETP_REQ * ecb_noinline
338	static ETP_REQ *reqq_shift (etp_reqq *q)	433	reqq_shift (etp_reqq *q)
339	{	434	{
340	int pri;	435	int pri;
341		436
342	if (!q->size)	437	if (!q->size)
343	return 0;	438	return 0;
…		…
358	}	453	}
359		454
360	abort ();	455	abort ();
361	}	456	}
362		457
363	static void etp_atfork_prepare (void)	458	static int ecb_cold
		459	etp_init (void (*want_poll)(void), void (*done_poll)(void))
364	{	460	{
365	X_LOCK (wrklock);	461	X_MUTEX_CREATE (wrklock);
366	X_LOCK (reqlock);	462	X_MUTEX_CREATE (reslock);
367	X_LOCK (reslock);	463	X_MUTEX_CREATE (reqlock);
368	#if !HAVE_PREADWRITE	464	X_COND_CREATE (reqwait);
369	X_LOCK (preadwritelock);
370	#endif
371	}
372		465
373	static void etp_atfork_parent (void)	466	reqq_init (&req_queue);
374	{	467	reqq_init (&res_queue);
375	#if !HAVE_PREADWRITE
376	X_UNLOCK (preadwritelock);
377	#endif
378	X_UNLOCK (reslock);
379	X_UNLOCK (reqlock);
380	X_UNLOCK (wrklock);
381	}
382		468
383	static void etp_atfork_child (void)	469	wrk_first.next =
384	{	470	wrk_first.prev = &wrk_first;
385	ETP_REQ *prv;
386
387	while ((prv = reqq_shift (&req_queue)))
388	ETP_DESTROY (prv);
389
390	while ((prv = reqq_shift (&res_queue)))
391	ETP_DESTROY (prv);
392
393	while (wrk_first.next != &wrk_first)
394	{
395	etp_worker *wrk = wrk_first.next;
396
397	if (wrk->req)
398	ETP_DESTROY (wrk->req);
399
400	etp_worker_clear (wrk);
401	etp_worker_free (wrk);
402	}
403		471
404	started = 0;	472	started = 0;
405	idle = 0;	473	idle = 0;
406	nreqs = 0;	474	nreqs = 0;
407	nready = 0;	475	nready = 0;
408	npending = 0;	476	npending = 0;
409		477
410	etp_atfork_parent ();
411	}
412
413	static void
414	etp_once_init (void)
415	{
416	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
417	}
418
419	static int
420	etp_init (void (*want_poll)(void), void (*done_poll)(void))
421	{
422	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
423
424	pthread_once (&doinit, etp_once_init);
425
426	want_poll_cb = want_poll;	478	want_poll_cb = want_poll;
427	done_poll_cb = done_poll;	479	done_poll_cb = done_poll;
428		480
429	return 0;	481	return 0;
430	}	482	}
431		483
432	X_THREAD_PROC (etp_proc);	484	X_THREAD_PROC (etp_proc);
433		485
		486	static void ecb_cold
434	static void etp_start_thread (void)	487	etp_start_thread (void)
435	{	488	{
436	etp_worker *wrk = calloc (1, sizeof (etp_worker));	489	etp_worker *wrk = calloc (1, sizeof (etp_worker));
437		490
438	/*TODO*/	491	/*TODO*/
439	assert (("unable to allocate worker thread data", wrk));	492	assert (("unable to allocate worker thread data", wrk));
…		…
452	free (wrk);	505	free (wrk);
453		506
454	X_UNLOCK (wrklock);	507	X_UNLOCK (wrklock);
455	}	508	}
456		509
		510	static void
457	static void etp_maybe_start_thread (void)	511	etp_maybe_start_thread (void)
458	{	512	{
459	if (expect_true (etp_nthreads () >= wanted))	513	if (ecb_expect_true (etp_nthreads () >= wanted))
460	return;	514	return;
461		515
462	/* todo: maybe use idle here, but might be less exact */	516	/* todo: maybe use idle here, but might be less exact */
463	if (expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))	517	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
464	return;	518	return;
465		519
466	etp_start_thread ();	520	etp_start_thread ();
467	}	521	}
468		522
		523	static void ecb_cold
469	static void etp_end_thread (void)	524	etp_end_thread (void)
470	{	525	{
471	eio_req *req = calloc (1, sizeof (eio_req));	526	eio_req *req = calloc (1, sizeof (eio_req));
472		527
473	req->type = -1;	528	req->type = -1;
474	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;	529	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
…		…
481	X_LOCK (wrklock);	536	X_LOCK (wrklock);
482	--started;	537	--started;
483	X_UNLOCK (wrklock);	538	X_UNLOCK (wrklock);
484	}	539	}
485		540
486	static int etp_poll (void)	541	static int
		542	etp_poll (void)
487	{	543	{
488	unsigned int maxreqs;	544	unsigned int maxreqs;
489	unsigned int maxtime;	545	unsigned int maxtime;
490	struct timeval tv_start, tv_now;	546	struct timeval tv_start, tv_now;
491		547
…		…
521		577
522	X_LOCK (reqlock);	578	X_LOCK (reqlock);
523	--nreqs;	579	--nreqs;
524	X_UNLOCK (reqlock);	580	X_UNLOCK (reqlock);
525		581
526	if (expect_false (req->type == EIO_GROUP && req->size))	582	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
527	{	583	{
528	req->int1 = 1; /* mark request as delayed */	584	req->int1 = 1; /* mark request as delayed */
529	continue;	585	continue;
530	}	586	}
531	else	587	else
532	{	588	{
533	int res = ETP_FINISH (req);	589	int res = ETP_FINISH (req);
534	if (expect_false (res))	590	if (ecb_expect_false (res))
535	return res;	591	return res;
536	}	592	}
537		593
538	if (expect_false (maxreqs && !--maxreqs))	594	if (ecb_expect_false (maxreqs && !--maxreqs))
539	break;	595	break;
540		596
541	if (maxtime)	597	if (maxtime)
542	{	598	{
543	gettimeofday (&tv_now, 0);	599	gettimeofday (&tv_now, 0);
…		…
549		605
550	errno = EAGAIN;	606	errno = EAGAIN;
551	return -1;	607	return -1;
552	}	608	}
553		609
		610	static void
554	static void etp_cancel (ETP_REQ *req)	611	etp_cancel (ETP_REQ *req)
555	{	612	{
556	X_LOCK (wrklock);	613	req->cancelled = 1;
557	req->flags |= EIO_FLAG_CANCELLED;
558	X_UNLOCK (wrklock);
559		614
560	eio_grp_cancel (req);	615	eio_grp_cancel (req);
561	}	616	}
562		617
		618	static void
563	static void etp_submit (ETP_REQ *req)	619	etp_submit (ETP_REQ *req)
564	{	620	{
565	req->pri -= ETP_PRI_MIN;	621	req->pri -= ETP_PRI_MIN;
566		622
567	if (expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;	623	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;	624	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
569		625
570	if (expect_false (req->type == EIO_GROUP))	626	if (ecb_expect_false (req->type == EIO_GROUP))
571	{	627	{
572	/* I hope this is worth it :/ */	628	/* I hope this is worth it :/ */
573	X_LOCK (reqlock);	629	X_LOCK (reqlock);
574	++nreqs;	630	++nreqs;
575	X_UNLOCK (reqlock);	631	X_UNLOCK (reqlock);
…		…
594		650
595	etp_maybe_start_thread ();	651	etp_maybe_start_thread ();
596	}	652	}
597	}	653	}
598		654
		655	static void ecb_cold
599	static void etp_set_max_poll_time (double nseconds)	656	etp_set_max_poll_time (double nseconds)
600	{	657	{
601	if (WORDACCESS_UNSAFE) X_LOCK (reslock);	658	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
602	max_poll_time = nseconds;	659	max_poll_time = nseconds * EIO_TICKS;
603	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);	660	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
604	}	661	}
605		662
		663	static void ecb_cold
606	static void etp_set_max_poll_reqs (unsigned int maxreqs)	664	etp_set_max_poll_reqs (unsigned int maxreqs)
607	{	665	{
608	if (WORDACCESS_UNSAFE) X_LOCK (reslock);	666	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
609	max_poll_reqs = maxreqs;	667	max_poll_reqs = maxreqs;
610	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);	668	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
611	}	669	}
612		670
		671	static void ecb_cold
613	static void etp_set_max_idle (unsigned int nthreads)	672	etp_set_max_idle (unsigned int nthreads)
614	{	673	{
615	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	674	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
616	max_idle = nthreads <= 0 ? 1 : nthreads;	675	max_idle = nthreads;
617	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	676	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
618	}	677	}
619		678
		679	static void ecb_cold
		680	etp_set_idle_timeout (unsigned int seconds)
		681	{
		682	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		683	idle_timeout = seconds;
		684	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		685	}
		686
		687	static void ecb_cold
620	static void etp_set_min_parallel (unsigned int nthreads)	688	etp_set_min_parallel (unsigned int nthreads)
621	{	689	{
622	if (wanted < nthreads)	690	if (wanted < nthreads)
623	wanted = nthreads;	691	wanted = nthreads;
624	}	692	}
625		693
		694	static void ecb_cold
626	static void etp_set_max_parallel (unsigned int nthreads)	695	etp_set_max_parallel (unsigned int nthreads)
627	{	696	{
628	if (wanted > nthreads)	697	if (wanted > nthreads)
629	wanted = nthreads;	698	wanted = nthreads;
630		699
631	while (started > wanted)	700	while (started > wanted)
632	etp_end_thread ();	701	etp_end_thread ();
633	}	702	}
634		703
635	/*****************************************************************************/	704	/*****************************************************************************/
636		705
		706	static void
637	static void grp_try_feed (eio_req *grp)	707	grp_try_feed (eio_req *grp)
638	{	708	{
639	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	709	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
640	{	710	{
641	grp->flags &= ~EIO_FLAG_GROUPADD;	711	grp->flags &= ~EIO_FLAG_GROUPADD;
642		712
…		…
649	break;	719	break;
650	}	720	}
651	}	721	}
652	}	722	}
653		723
		724	static int
654	static int grp_dec (eio_req *grp)	725	grp_dec (eio_req *grp)
655	{	726	{
656	--grp->size;	727	--grp->size;
657		728
658	/* call feeder, if applicable */	729	/* call feeder, if applicable */
659	grp_try_feed (grp);	730	grp_try_feed (grp);
…		…
663	return eio_finish (grp);	734	return eio_finish (grp);
664	else	735	else
665	return 0;	736	return 0;
666	}	737	}
667		738
		739	static void
668	void eio_destroy (eio_req *req)	740	eio_destroy (eio_req *req)
669	{	741	{
670	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);	742	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
671	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);	743	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
672		744
673	EIO_DESTROY (req);	745	EIO_DESTROY (req);
674	}	746	}
675		747
		748	static int
676	static int eio_finish (eio_req *req)	749	eio_finish (eio_req *req)
677	{	750	{
678	int res = EIO_FINISH (req);	751	int res = EIO_FINISH (req);
679		752
680	if (req->grp)	753	if (req->grp)
681	{	754	{
…		…
689	if (grp->grp_first == req)	762	if (grp->grp_first == req)
690	grp->grp_first = req->grp_next;	763	grp->grp_first = req->grp_next;
691		764
692	res2 = grp_dec (grp);	765	res2 = grp_dec (grp);
693		766
694	if (!res && res2)	767	if (!res)
695	res = res2;	768	res = res2;
696	}	769	}
697		770
698	eio_destroy (req);	771	eio_destroy (req);
699		772
700	return res;	773	return res;
701	}	774	}
702		775
		776	void
703	void eio_grp_cancel (eio_req *grp)	777	eio_grp_cancel (eio_req *grp)
704	{	778	{
705	for (grp = grp->grp_first; grp; grp = grp->grp_next)	779	for (grp = grp->grp_first; grp; grp = grp->grp_next)
706	eio_cancel (grp);	780	eio_cancel (grp);
707	}	781	}
708		782
		783	void
709	void eio_cancel (eio_req *req)	784	eio_cancel (eio_req *req)
710	{	785	{
711	etp_cancel (req);	786	etp_cancel (req);
712	}	787	}
713		788
		789	void
714	void eio_submit (eio_req *req)	790	eio_submit (eio_req *req)
715	{	791	{
716	etp_submit (req);	792	etp_submit (req);
717	}	793	}
718		794
719	unsigned int eio_nreqs (void)	795	unsigned int
		796	eio_nreqs (void)
720	{	797	{
721	return etp_nreqs ();	798	return etp_nreqs ();
722	}	799	}
723		800
724	unsigned int eio_nready (void)	801	unsigned int
		802	eio_nready (void)
725	{	803	{
726	return etp_nready ();	804	return etp_nready ();
727	}	805	}
728		806
729	unsigned int eio_npending (void)	807	unsigned int
		808	eio_npending (void)
730	{	809	{
731	return etp_npending ();	810	return etp_npending ();
732	}	811	}
733		812
734	unsigned int eio_nthreads (void)	813	unsigned int ecb_cold
		814	eio_nthreads (void)
735	{	815	{
736	return etp_nthreads ();	816	return etp_nthreads ();
737	}	817	}
738		818
		819	void ecb_cold
739	void eio_set_max_poll_time (double nseconds)	820	eio_set_max_poll_time (double nseconds)
740	{	821	{
741	etp_set_max_poll_time (nseconds);	822	etp_set_max_poll_time (nseconds);
742	}	823	}
743		824
		825	void ecb_cold
744	void eio_set_max_poll_reqs (unsigned int maxreqs)	826	eio_set_max_poll_reqs (unsigned int maxreqs)
745	{	827	{
746	etp_set_max_poll_reqs (maxreqs);	828	etp_set_max_poll_reqs (maxreqs);
747	}	829	}
748		830
		831	void ecb_cold
749	void eio_set_max_idle (unsigned int nthreads)	832	eio_set_max_idle (unsigned int nthreads)
750	{	833	{
751	etp_set_max_idle (nthreads);	834	etp_set_max_idle (nthreads);
752	}	835	}
753		836
		837	void ecb_cold
		838	eio_set_idle_timeout (unsigned int seconds)
		839	{
		840	etp_set_idle_timeout (seconds);
		841	}
		842
		843	void ecb_cold
754	void eio_set_min_parallel (unsigned int nthreads)	844	eio_set_min_parallel (unsigned int nthreads)
755	{	845	{
756	etp_set_min_parallel (nthreads);	846	etp_set_min_parallel (nthreads);
757	}	847	}
758		848
		849	void ecb_cold
759	void eio_set_max_parallel (unsigned int nthreads)	850	eio_set_max_parallel (unsigned int nthreads)
760	{	851	{
761	etp_set_max_parallel (nthreads);	852	etp_set_max_parallel (nthreads);
762	}	853	}
763		854
764	int eio_poll (void)	855	int eio_poll (void)
…		…
773	# undef pread	864	# undef pread
774	# undef pwrite	865	# undef pwrite
775	# define pread eio__pread	866	# define pread eio__pread
776	# define pwrite eio__pwrite	867	# define pwrite eio__pwrite
777		868
778	static ssize_t	869	static eio_ssize_t
779	eio__pread (int fd, void *buf, size_t count, off_t offset)	870	eio__pread (int fd, void *buf, size_t count, off_t offset)
780	{	871	{
781	ssize_t res;	872	eio_ssize_t res;
782	off_t ooffset;	873	off_t ooffset;
783		874
784	X_LOCK (preadwritelock);	875	X_LOCK (preadwritelock);
785	ooffset = lseek (fd, 0, SEEK_CUR);	876	ooffset = lseek (fd, 0, SEEK_CUR);
786	lseek (fd, offset, SEEK_SET);	877	lseek (fd, offset, SEEK_SET);
…		…
789	X_UNLOCK (preadwritelock);	880	X_UNLOCK (preadwritelock);
790		881
791	return res;	882	return res;
792	}	883	}
793		884
794	static ssize_t	885	static eio_ssize_t
795	eio__pwrite (int fd, void *buf, size_t count, off_t offset)	886	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
796	{	887	{
797	ssize_t res;	888	eio_ssize_t res;
798	off_t ooffset;	889	off_t ooffset;
799		890
800	X_LOCK (preadwritelock);	891	X_LOCK (preadwritelock);
801	ooffset = lseek (fd, 0, SEEK_CUR);	892	ooffset = lseek (fd, 0, SEEK_CUR);
802	lseek (fd, offset, SEEK_SET);	893	lseek (fd, offset, SEEK_SET);
…		…
806		897
807	return res;	898	return res;
808	}	899	}
809	#endif	900	#endif
810		901
811	#ifndef HAVE_FUTIMES	902	#ifndef HAVE_UTIMES
812		903
813	# undef utimes	904	# undef utimes
814	# undef futimes
815	# define utimes(path,times) eio__utimes (path, times)	905	# define utimes(path,times) eio__utimes (path, times)
816	# define futimes(fd,times) eio__futimes (fd, times)
817		906
818	static int	907	static int
819	eio__utimes (const char *filename, const struct timeval times[2])	908	eio__utimes (const char *filename, const struct timeval times[2])
820	{	909	{
821	if (times)	910	if (times)
…		…
829	}	918	}
830	else	919	else
831	return utime (filename, 0);	920	return utime (filename, 0);
832	}	921	}
833		922
		923	#endif
		924
		925	#ifndef HAVE_FUTIMES
		926
		927	# undef futimes
		928	# define futimes(fd,times) eio__futimes (fd, times)
		929
		930	static int
834	static int eio__futimes (int fd, const struct timeval tv[2])	931	eio__futimes (int fd, const struct timeval tv[2])
835	{	932	{
836	errno = ENOSYS;	933	errno = ENOSYS;
837	return -1;	934	return -1;
838	}	935	}
839		936
…		…
843	# undef fdatasync	940	# undef fdatasync
844	# define fdatasync(fd) fsync (fd)	941	# define fdatasync(fd) fsync (fd)
845	#endif	942	#endif
846		943
847	/* sync_file_range always needs emulation */	944	/* sync_file_range always needs emulation */
848	int	945	static int
849	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)	946	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
850	{	947	{
851	#if HAVE_SYNC_FILE_RANGE	948	#if HAVE_SYNC_FILE_RANGE
852	int res;	949	int res;
853		950
…		…
866	if (!res || errno != ENOSYS)	963	if (!res || errno != ENOSYS)
867	return res;	964	return res;
868	#endif	965	#endif
869		966
870	/* even though we could play tricks with the flags, it's better to always	967	/* 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 */	968	* call fdatasync, as that matches the expectation of its users best */
872	return fdatasync (fd);	969	return fdatasync (fd);
		970	}
		971
		972	static int
		973	eio__fallocate (int fd, int mode, off_t offset, size_t len)
		974	{
		975	#if HAVE_FALLOCATE
		976	return fallocate (fd, mode, offset, len);
		977	#else
		978	errno = ENOSYS;
		979	return -1;
		980	#endif
873	}	981	}
874		982
875	#if !HAVE_READAHEAD	983	#if !HAVE_READAHEAD
876	# undef readahead	984	# undef readahead
877	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)	985	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
878		986
879	static ssize_t	987	static eio_ssize_t
880	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)	988	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
881	{	989	{
882	size_t todo = count;	990	size_t todo = count;
883	dBUF;	991	dBUF;
884		992
…		…
896	}	1004	}
897		1005
898	#endif	1006	#endif
899		1007
900	/* sendfile always needs emulation */	1008	/* sendfile always needs emulation */
901	static ssize_t	1009	static eio_ssize_t
902	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)	1010	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
903	{	1011	{
		1012	eio_ssize_t written = 0;
904	ssize_t res;	1013	eio_ssize_t res;
905		1014
906	if (!count)	1015	if (!count)
907	return 0;	1016	return 0;
908		1017
		1018	for (;;)
		1019	{
		1020	#ifdef __APPLE__
		1021	# undef HAVE_SENDFILE /* broken, as everything on os x */
		1022	#endif
909	#if HAVE_SENDFILE	1023	#if HAVE_SENDFILE
910	# if __linux	1024	# if __linux
		1025	off_t soffset = offset;
911	res = sendfile (ofd, ifd, &offset, count);	1026	res = sendfile (ofd, ifd, &soffset, count);
912		1027
913	# elif __freebsd	1028	# elif __FreeBSD__
914	/*	1029	/*
915	* Of course, the freebsd sendfile is a dire hack with no thoughts	1030	* Of course, the freebsd sendfile is a dire hack with no thoughts
916	* wasted on making it similar to other I/O functions.	1031	* wasted on making it similar to other I/O functions.
917	*/	1032	*/
918	{
919	off_t sbytes;	1033	off_t sbytes;
920	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	1034	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
921		1035
922	if (res < 0 && sbytes)	1036	#if 0 /* according to the manpage, this is correct, but broken behaviour */
923	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */	1037	/* freebsd' sendfile will return 0 on success */
		1038	/* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
		1039	/* not on e.g. EIO or EPIPE - sounds broken */
		1040	if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
924	res = sbytes;	1041	res = sbytes;
925	}	1042	#endif
		1043
		1044	/* according to source inspection, this is correct, and useful behaviour */
		1045	if (sbytes)
		1046	res = sbytes;
		1047
		1048	# elif defined (__APPLE__)
		1049	off_t sbytes = count;
		1050	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
		1051
		1052	/* according to the manpage, sbytes is always valid */
		1053	if (sbytes)
		1054	res = sbytes;
926		1055
927	# elif __hpux	1056	# elif __hpux
928	res = sendfile (ofd, ifd, offset, count, 0, 0);	1057	res = sendfile (ofd, ifd, offset, count, 0, 0);
929		1058
930	# elif __solaris	1059	# elif __solaris
931	{
932	struct sendfilevec vec;	1060	struct sendfilevec vec;
933	size_t sbytes;	1061	size_t sbytes;
934		1062
935	vec.sfv_fd = ifd;	1063	vec.sfv_fd = ifd;
936	vec.sfv_flag = 0;	1064	vec.sfv_flag = 0;
937	vec.sfv_off = offset;	1065	vec.sfv_off = offset;
938	vec.sfv_len = count;	1066	vec.sfv_len = count;
939		1067
940	res = sendfilev (ofd, &vec, 1, &sbytes);	1068	res = sendfilev (ofd, &vec, 1, &sbytes);
941		1069
942	if (res < 0 && sbytes)	1070	if (res < 0 && sbytes)
943	res = sbytes;	1071	res = sbytes;
944	}
945		1072
946	# endif	1073	# endif
		1074
		1075	#elif defined (_WIN32) && 0
		1076	/* does not work, just for documentation of what would need to be done */
		1077	/* actually, cannot be done like this, as TransmitFile changes the file offset, */
		1078	/* libeio guarantees that the file offset does not change, and windows */
		1079	/* has no way to get an independent handle to the same file description */
		1080	HANDLE h = TO_SOCKET (ifd);
		1081	SetFilePointer (h, offset, 0, FILE_BEGIN);
		1082	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
		1083
947	#else	1084	#else
948	res = -1;	1085	res = -1;
949	errno = ENOSYS;	1086	errno = ENOSYS;
950	#endif	1087	#endif
951		1088
		1089	/* we assume sendfile can copy at least 128mb in one go */
		1090	if (res <= 128 * 1024 * 1024)
		1091	{
		1092	if (res > 0)
		1093	written += res;
		1094
		1095	if (written)
		1096	return written;
		1097
		1098	break;
		1099	}
		1100	else
		1101	{
		1102	/* if we requested more, then probably the kernel was lazy */
		1103	written += res;
		1104	offset += res;
		1105	count -= res;
		1106
		1107	if (!count)
		1108	return written;
		1109	}
		1110	}
		1111
952	if (res < 0	1112	if (res < 0
953	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	1113	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		1114	/* BSDs */
		1115	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
		1116	|| errno == ENOTSUP
		1117	#endif
		1118	#ifdef EOPNOTSUPP /* windows */
		1119	|| errno == EOPNOTSUPP /* BSDs */
		1120	#endif
954	#if __solaris	1121	#if __solaris
955	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	1122	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
956	#endif	1123	#endif
957	)	1124	)
958	)	1125	)
…		…
962		1129
963	res = 0;	1130	res = 0;
964		1131
965	while (count)	1132	while (count)
966	{	1133	{
967	ssize_t cnt;	1134	eio_ssize_t cnt;
968		1135
969	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);	1136	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);
970		1137
971	if (cnt <= 0)	1138	if (cnt <= 0)
972	{	1139	{
…		…
989	}	1156	}
990		1157
991	return res;	1158	return res;
992	}	1159	}
993		1160
		1161	#ifdef PAGESIZE
		1162	# define eio_pagesize() PAGESIZE
		1163	#else
		1164	static intptr_t
		1165	eio_pagesize (void)
		1166	{
		1167	static intptr_t page;
		1168
		1169	if (!page)
		1170	page = sysconf (_SC_PAGESIZE);
		1171
		1172	return page;
		1173	}
		1174	#endif
		1175
		1176	static void
		1177	eio_page_align (void **addr, size_t *length)
		1178	{
		1179	intptr_t mask = eio_pagesize () - 1;
		1180
		1181	/* round down addr */
		1182	intptr_t adj = mask & (intptr_t)*addr;
		1183
		1184	*addr = (void *)((intptr_t)*addr - adj);
		1185	*length += adj;
		1186
		1187	/* round up length */
		1188	*length = (*length + mask) & ~mask;
		1189	}
		1190
		1191	#if !_POSIX_MEMLOCK
		1192	# define eio__mlockall(a) EIO_ENOSYS ()
		1193	#else
		1194
994	static int	1195	static int
		1196	eio__mlockall (int flags)
		1197	{
		1198	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1199	extern int mallopt (int, int);
		1200	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1201	#endif
		1202
		1203	if (EIO_MCL_CURRENT != MCL_CURRENT
		1204	|| EIO_MCL_FUTURE != MCL_FUTURE)
		1205	{
		1206	flags = 0
		1207	| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
		1208	| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
		1209	}
		1210
		1211	return mlockall (flags);
		1212	}
		1213	#endif
		1214
		1215	#if !_POSIX_MEMLOCK_RANGE
		1216	# define eio__mlock(a,b) EIO_ENOSYS ()
		1217	#else
		1218
		1219	static int
		1220	eio__mlock (void *addr, size_t length)
		1221	{
		1222	eio_page_align (&addr, &length);
		1223
		1224	return mlock (addr, length);
		1225	}
		1226
		1227	#endif
		1228
		1229	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1230	# define eio__msync(a,b,c) EIO_ENOSYS ()
		1231	#else
		1232
		1233	static int
		1234	eio__msync (void *mem, size_t len, int flags)
		1235	{
		1236	eio_page_align (&mem, &len);
		1237
		1238	if (EIO_MS_ASYNC != MS_SYNC
		1239	|| EIO_MS_INVALIDATE != MS_INVALIDATE
		1240	|| EIO_MS_SYNC != MS_SYNC)
		1241	{
		1242	flags = 0
		1243	| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
		1244	| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
		1245	| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
		1246	}
		1247
		1248	return msync (mem, len, flags);
		1249	}
		1250
		1251	#endif
		1252
		1253	static int
		1254	eio__mtouch (eio_req *req)
		1255	{
		1256	void *mem = req->ptr2;
		1257	size_t len = req->size;
		1258	int flags = req->int1;
		1259
		1260	eio_page_align (&mem, &len);
		1261
		1262	{
		1263	intptr_t addr = (intptr_t)mem;
		1264	intptr_t end = addr + len;
		1265	intptr_t page = eio_pagesize ();
		1266
		1267	if (addr < end)
		1268	if (flags & EIO_MT_MODIFY) /* modify */
		1269	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1270	else
		1271	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1272	}
		1273
		1274	return 0;
		1275	}
		1276
		1277	/*****************************************************************************/
		1278	/* requests implemented outside eio_execute, because they are so large */
		1279
		1280	static void
		1281	eio__realpath (eio_req *req, etp_worker *self)
		1282	{
		1283	char *rel = req->ptr1;
		1284	char *res;
		1285	char *tmp1, *tmp2;
		1286	#if SYMLOOP_MAX > 32
		1287	int symlinks = SYMLOOP_MAX;
		1288	#else
		1289	int symlinks = 32;
		1290	#endif
		1291
		1292	req->result = -1;
		1293
		1294	errno = EINVAL;
		1295	if (!rel)
		1296	return;
		1297
		1298	errno = ENOENT;
		1299	if (!*rel)
		1300	return;
		1301
		1302	if (!req->ptr2)
		1303	{
		1304	X_LOCK (wrklock);
		1305	req->flags |= EIO_FLAG_PTR2_FREE;
		1306	X_UNLOCK (wrklock);
		1307	req->ptr2 = malloc (PATH_MAX * 3);
		1308
		1309	errno = ENOMEM;
		1310	if (!req->ptr2)
		1311	return;
		1312	}
		1313
		1314	res = req->ptr2;
		1315	tmp1 = res + PATH_MAX;
		1316	tmp2 = tmp1 + PATH_MAX;
		1317
		1318	#if 0 /* disabled, the musl way to do things is just too racy */
		1319	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
		1320	/* on linux we may be able to ask the kernel */
		1321	{
		1322	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
		1323
		1324	if (fd >= 0)
		1325	{
		1326	sprintf (tmp1, "/proc/self/fd/%d", fd);
		1327	req->result = readlink (tmp1, res, PATH_MAX);
		1328	close (fd);
		1329
		1330	/* here we should probably stat the open file and the disk file, to make sure they still match */
		1331
		1332	if (req->result > 0)
		1333	goto done;
		1334	}
		1335	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
		1336	return;
		1337	}
		1338	#endif
		1339	#endif
		1340
		1341	if (*rel != '/')
		1342	{
		1343	if (!getcwd (res, PATH_MAX))
		1344	return;
		1345
		1346	if (res [1]) /* only use if not / */
		1347	res += strlen (res);
		1348	}
		1349
		1350	while (*rel)
		1351	{
		1352	eio_ssize_t len, linklen;
		1353	char *beg = rel;
		1354
		1355	while (*rel && *rel != '/')
		1356	++rel;
		1357
		1358	len = rel - beg;
		1359
		1360	if (!len) /* skip slashes */
		1361	{
		1362	++rel;
		1363	continue;
		1364	}
		1365
		1366	if (beg [0] == '.')
		1367	{
		1368	if (len == 1)
		1369	continue; /* . - nop */
		1370
		1371	if (beg [1] == '.' && len == 2)
		1372	{
		1373	/* .. - back up one component, if possible */
		1374
		1375	while (res != req->ptr2)
		1376	if (*--res == '/')
		1377	break;
		1378
		1379	continue;
		1380	}
		1381	}
		1382
		1383	errno = ENAMETOOLONG;
		1384	if (res + 1 + len + 1 >= tmp1)
		1385	return;
		1386
		1387	/* copy one component */
		1388	*res = '/';
		1389	memcpy (res + 1, beg, len);
		1390
		1391	/* zero-terminate, for readlink */
		1392	res [len + 1] = 0;
		1393
		1394	/* now check if it's a symlink */
		1395	linklen = readlink (req->ptr2, tmp1, PATH_MAX);
		1396
		1397	if (linklen < 0)
		1398	{
		1399	if (errno != EINVAL)
		1400	return;
		1401
		1402	/* it's a normal directory. hopefully */
		1403	res += len + 1;
		1404	}
		1405	else
		1406	{
		1407	/* yay, it was a symlink - build new path in tmp2 */
		1408	int rellen = strlen (rel);
		1409
		1410	errno = ENAMETOOLONG;
		1411	if (linklen + 1 + rellen >= PATH_MAX)
		1412	return;
		1413
		1414	errno = ELOOP;
		1415	if (!--symlinks)
		1416	return;
		1417
		1418	if (*tmp1 == '/')
		1419	res = req->ptr2; /* symlink resolves to an absolute path */
		1420
		1421	/* we need to be careful, as rel might point into tmp2 already */
		1422	memmove (tmp2 + linklen + 1, rel, rellen + 1);
		1423	tmp2 [linklen] = '/';
		1424	memcpy (tmp2, tmp1, linklen);
		1425
		1426	rel = tmp2;
		1427	}
		1428	}
		1429
		1430	/* special case for the lone root path */
		1431	if (res == req->ptr2)
		1432	*res++ = '/';
		1433
		1434	req->result = res - (char *)req->ptr2;
		1435
		1436	done:
		1437	req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */
		1438	}
		1439
		1440	static signed char
995	eio_dent_cmp (const void *a_, const void *b_)	1441	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
996	{	1442	{
997	const eio_dirent *a = (const eio_dirent *)a_;	1443	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_;	1444	: a->inode < b->inode ? -1
		1445	: a->inode > b->inode ? 1
		1446	: 0;
		1447	}
999		1448
1000	return (int)b->score - (int)a->score ? (int)b->score - (int)a->score	1449	#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 */	1450
		1451	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
		1452	#define EIO_SORT_FAST 60 /* when to only use insertion sort */
		1453
		1454	static void
		1455	eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
		1456	{
		1457	unsigned char bits [9 + sizeof (eio_ino_t) * 8];
		1458	unsigned char *bit = bits;
		1459
		1460	assert (CHAR_BIT == 8);
		1461	assert (sizeof (eio_dirent) * 8 < 256);
		1462	assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
		1463	assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */
		1464
		1465	if (size <= EIO_SORT_FAST)
		1466	return;
		1467
		1468	/* first prepare an array of bits to test in our radix sort */
		1469	/* try to take endianness into account, as well as differences in eio_ino_t sizes */
		1470	/* inode_bits must contain all inodes ORed together */
		1471	/* which is used to skip bits that are 0 everywhere, which is very common */
		1472	{
		1473	eio_ino_t endianness;
		1474	int i, j;
		1475
		1476	/* we store the byte offset of byte n into byte n of "endianness" */
		1477	for (i = 0; i < sizeof (eio_ino_t); ++i)
		1478	((unsigned char *)&endianness)[i] = i;
		1479
		1480	*bit++ = 0;
		1481
		1482	for (i = 0; i < sizeof (eio_ino_t); ++i)
		1483	{
		1484	/* shifting off the byte offsets out of "endianness" */
		1485	int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
		1486	endianness >>= 8;
		1487
		1488	for (j = 0; j < 8; ++j)
		1489	if (inode_bits & (((eio_ino_t)1) << (i * 8 + j)))
		1490	*bit++ = offs + j;
		1491	}
		1492
		1493	for (j = 0; j < 8; ++j)
		1494	if (score_bits & (1 << j))
		1495	*bit++ = offsetof (eio_dirent, score) * 8 + j;
		1496	}
		1497
		1498	/* now actually do the sorting (a variant of MSD radix sort) */
		1499	{
		1500	eio_dirent *base_stk [9 + sizeof (eio_ino_t) * 8], *base;
		1501	eio_dirent *end_stk [9 + sizeof (eio_ino_t) * 8], *end;
		1502	unsigned char *bit_stk [9 + sizeof (eio_ino_t) * 8];
		1503	int stk_idx = 0;
		1504
		1505	base_stk [stk_idx] = dents;
		1506	end_stk [stk_idx] = dents + size;
		1507	bit_stk [stk_idx] = bit - 1;
		1508
		1509	do
		1510	{
		1511	base = base_stk [stk_idx];
		1512	end = end_stk [stk_idx];
		1513	bit = bit_stk [stk_idx];
		1514
		1515	for (;;)
		1516	{
		1517	unsigned char O = *bit >> 3;
		1518	unsigned char M = 1 << (*bit & 7);
		1519
		1520	eio_dirent *a = base;
		1521	eio_dirent *b = end;
		1522
		1523	if (b - a < EIO_SORT_CUTOFF)
		1524	break;
		1525
		1526	/* now bit-partition the array on the bit */
		1527	/* this ugly asymmetric loop seems to perform much better than typical */
		1528	/* partition algos found in the literature */
		1529	do
		1530	if (!(((unsigned char *)a)[O] & M))
		1531	++a;
		1532	else if (!(((unsigned char *)--b)[O] & M))
		1533	{
		1534	eio_dirent tmp = *a; *a = *b; *b = tmp;
		1535	++a;
		1536	}
		1537	while (b > a);
		1538
		1539	/* next bit, or stop, if no bits left in this path */
		1540	if (!*--bit)
		1541	break;
		1542
		1543	base_stk [stk_idx] = a;
		1544	end_stk [stk_idx] = end;
		1545	bit_stk [stk_idx] = bit;
		1546	++stk_idx;
		1547
		1548	end = a;
		1549	}
		1550	}
		1551	while (stk_idx--);
		1552	}
		1553	}
		1554
		1555	static void
		1556	eio_dent_insertion_sort (eio_dirent *dents, int size)
		1557	{
		1558	/* first move the smallest element to the front, to act as a sentinel */
		1559	{
		1560	int i;
		1561	eio_dirent *min = dents;
		1562
		1563	/* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
		1564	for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
		1565	if (EIO_DENT_CMP (dents [i], <, *min))
		1566	min = &dents [i];
		1567
		1568	/* swap elements 0 and j (minimum) */
		1569	{
		1570	eio_dirent tmp = *dents; *dents = *min; *min = tmp;
		1571	}
		1572	}
		1573
		1574	/* then do standard insertion sort, assuming that all elements are >= dents [0] */
		1575	{
		1576	eio_dirent *i, *j;
		1577
		1578	for (i = dents + 1; i < dents + size; ++i)
		1579	{
		1580	eio_dirent value = *i;
		1581
		1582	for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
		1583	j [1] = j [0];
		1584
		1585	j [1] = value;
		1586	}
		1587	}
		1588	}
		1589
		1590	static void
		1591	eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
		1592	{
		1593	if (size <= 1)
		1594	return; /* our insertion sort relies on size > 0 */
		1595
		1596	/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
		1597	/* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
		1598	eio_dent_radix_sort (dents, size, score_bits, inode_bits);
		1599
		1600	/* use an insertion sort at the end, or for small arrays, */
		1601	/* as insertion sort is more efficient for small partitions */
		1602	eio_dent_insertion_sort (dents, size);
1002	}	1603	}
1003		1604
1004	/* read a full directory */	1605	/* read a full directory */
1005	static void	1606	static void
1006	eio__scandir (eio_req *req, etp_worker *self)	1607	eio__scandir (eio_req *req, etp_worker *self)
1007	{	1608	{
1008	DIR *dirp;
1009	EIO_STRUCT_DIRENT *entp;
1010	unsigned char *name, *names;	1609	char *name, *names;
1011	int namesalloc = 4096;	1610	int namesalloc = 4096 - sizeof (void *) * 4;
1012	int namesoffs = 0;	1611	int namesoffs = 0;
1013	int flags = req->int1;	1612	int flags = req->int1;
1014	eio_dirent *dents = 0;	1613	eio_dirent *dents = 0;
1015	int dentalloc = 128;	1614	int dentalloc = 128;
1016	int dentoffs = 0;	1615	int dentoffs = 0;
		1616	eio_ino_t inode_bits = 0;
		1617	#ifdef _WIN32
		1618	HANDLE dirp;
		1619	WIN32_FIND_DATA entp;
		1620	#else
		1621	DIR *dirp;
		1622	EIO_STRUCT_DIRENT *entp;
		1623	#endif
1017		1624
1018	req->result = -1;	1625	req->result = -1;
1019		1626
1020	if (!(flags & EIO_READDIR_DENTS))	1627	if (!(flags & EIO_READDIR_DENTS))
1021	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);	1628	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
1022		1629
1023	X_LOCK (wrklock);	1630	#ifdef _WIN32
1024	/* the corresponding closedir is in ETP_WORKER_CLEAR */	1631	{
		1632	int len = strlen ((const char *)req->ptr1);
		1633	char *path = malloc (MAX_PATH);
		1634	const char *fmt;
		1635
		1636	if (!len)
		1637	fmt = "./*";
		1638	else if (((const char *)req->ptr1)[len - 1] == '/' || ((const char *)req->ptr1)[len - 1] == '\\')
		1639	fmt = "%s*";
		1640	else
		1641	fmt = "%s/*";
		1642
		1643	_snprintf (path, MAX_PATH, fmt, (const char *)req->ptr1);
		1644	dirp = FindFirstFile (path, &entp);
		1645	free (path);
		1646
		1647	if (dirp == INVALID_HANDLE_VALUE)
		1648	{
		1649	dirp = 0;
		1650
		1651	switch (GetLastError ())
		1652	{
		1653	case ERROR_FILE_NOT_FOUND:
		1654	req->result = 0;
		1655	break;
		1656
		1657	case ERROR_INVALID_NAME:
		1658	case ERROR_PATH_NOT_FOUND:
		1659	case ERROR_NO_MORE_FILES:
		1660	errno = ENOENT;
		1661	break;
		1662
		1663	case ERROR_NOT_ENOUGH_MEMORY:
		1664	errno = ENOMEM;
		1665	break;
		1666
		1667	default:
		1668	errno = EINVAL;
		1669	break;
		1670	}
		1671	}
		1672	}
		1673	#else
1025	self->dirp = dirp = opendir (req->ptr1);	1674	dirp = opendir (req->ptr1);
		1675	#endif
		1676
		1677	if (req->flags & EIO_FLAG_PTR1_FREE)
		1678	free (req->ptr1);
		1679
1026	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;	1680	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;	1681	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
1029	X_UNLOCK (wrklock);	1682	req->ptr2 = names = malloc (namesalloc);
1030		1683
1031	if (dirp && names && (!flags || dents))	1684	if (dirp && names && (!flags || dents))
1032	for (;;)	1685	for (;;)
1033	{	1686	{
		1687	int done;
		1688
		1689	#ifdef _WIN32
		1690	done = !dirp;
		1691	#else
1034	errno = 0;	1692	errno = 0;
1035	entp = readdir (dirp);	1693	entp = readdir (dirp);
		1694	done = !entp;
		1695	#endif
1036		1696
1037	if (!entp)	1697	if (done)
1038	{	1698	{
		1699	#ifndef _WIN32
		1700	int old_errno = errno;
		1701	closedir (dirp);
		1702	errno = old_errno;
		1703
1039	if (errno)	1704	if (errno)
1040	break;	1705	break;
		1706	#endif
1041		1707
1042	/* sort etc. */	1708	/* sort etc. */
1043	req->int1 = flags;	1709	req->int1 = flags;
1044	req->result = dentoffs;	1710	req->result = dentoffs;
1045		1711
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	1712	if (flags & EIO_READDIR_STAT_ORDER)
1055	|| !(~flags & (EIO_READDIR_DIRS_FIRST | EIO_READDIR_FOUND_UNKNOWN)))	1713	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)	1714	else if (flags & EIO_READDIR_DIRS_FIRST)
		1715	if (flags & EIO_READDIR_FOUND_UNKNOWN)
		1716	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
		1717	else
1061	{	1718	{
1062	/* in this case, all is known, and we just put dirs first and sort them */	1719	/* in this case, all is known, and we just put dirs first and sort them */
1063	eio_dirent *ent = dents + dentoffs;	1720	eio_dirent *oth = dents + dentoffs;
1064	eio_dirent *dir = dents;	1721	eio_dirent *dir = dents;
1065		1722
		1723	/* now partition dirs to the front, and non-dirs to the back */
		1724	/* by walking from both sides and swapping if necessary */
1066	while (ent > dir)	1725	while (oth > dir)
1067	{	1726	{
1068	if (dir->type == DT_DIR)	1727	if (dir->type == EIO_DT_DIR)
1069	++dir;	1728	++dir;
1070	else
1071	{
1072	--ent;
1073
1074	if (ent->type == DT_DIR)	1729	else if ((--oth)->type == EIO_DT_DIR)
1075	{	1730	{
1076	eio_dirent tmp = *dir;	1731	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
1077	*dir = *ent;
1078	*ent = tmp;
1079		1732
1080	++dir;	1733	++dir;
1081	}	1734	}
1082	}	1735	}
		1736
		1737	/* now sort the dirs only (dirs all have the same score) */
		1738	eio_dent_sort (dents, dir - dents, 0, inode_bits);
1083	}	1739	}
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		1740
1099	break;	1741	break;
1100	}	1742	}
1101		1743
1102	/* now add the entry to our list(s) */	1744	/* now add the entry to our list(s) */
1103	name = entp->d_name;	1745	name = D_NAME (entp);
1104		1746
1105	/* skip . and .. entries */	1747	/* skip . and .. entries */
1106	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1748	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1107	{	1749	{
1108	int len = D_NAMLEN (entp) + 1;	1750	int len = D_NAMLEN (entp) + 1;
1109		1751
1110	while (expect_false (namesoffs + len > namesalloc))	1752	while (ecb_expect_false (namesoffs + len > namesalloc))
1111	{	1753	{
1112	namesalloc *= 2;	1754	namesalloc *= 2;
1113	X_LOCK (wrklock);
1114	req->ptr1 = names = realloc (names, namesalloc);	1755	req->ptr2 = names = realloc (names, namesalloc);
1115	X_UNLOCK (wrklock);
1116		1756
1117	if (!names)	1757	if (!names)
1118	break;	1758	break;
1119	}	1759	}
1120		1760
…		…
1122		1762
1123	if (dents)	1763	if (dents)
1124	{	1764	{
1125	struct eio_dirent *ent;	1765	struct eio_dirent *ent;
1126		1766
1127	if (expect_false (dentoffs == dentalloc))	1767	if (ecb_expect_false (dentoffs == dentalloc))
1128	{	1768	{
1129	dentalloc *= 2;	1769	dentalloc *= 2;
1130	X_LOCK (wrklock);
1131	req->ptr2 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));	1770	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
1132	X_UNLOCK (wrklock);
1133		1771
1134	if (!dents)	1772	if (!dents)
1135	break;	1773	break;
1136	}	1774	}
1137		1775
1138	ent = dents + dentoffs;	1776	ent = dents + dentoffs;
1139		1777
1140	ent->name = (char *)(size_t)namesoffs; /* rather dirtily we store the offset in the pointer */	1778	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
1141	ent->namelen = len - 1;	1779	ent->namelen = len - 1;
1142	ent->inode = D_INO (entp);	1780	ent->inode = D_INO (entp);
		1781
		1782	inode_bits |= ent->inode;
1143		1783
1144	switch (D_TYPE (entp))	1784	switch (D_TYPE (entp))
1145	{	1785	{
1146	default:	1786	default:
1147	ent->type = EIO_DT_UNKNOWN;	1787	ent->type = EIO_DT_UNKNOWN;
…		…
1190	#ifdef DT_WHT	1830	#ifdef DT_WHT
1191	case DT_WHT: ent->type = EIO_DT_WHT; break;	1831	case DT_WHT: ent->type = EIO_DT_WHT; break;
1192	#endif	1832	#endif
1193	}	1833	}
1194		1834
1195	ent->score = 0;	1835	ent->score = 7;
1196		1836
1197	if (flags & EIO_READDIR_DIRS_FIRST)	1837	if (flags & EIO_READDIR_DIRS_FIRST)
1198	{	1838	{
1199	if (ent->type == EIO_DT_UNKNOWN)	1839	if (ent->type == EIO_DT_UNKNOWN)
1200	{	1840	{
1201	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */	1841	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
1202	ent->score = 98;	1842	ent->score = 1;
1203	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */	1843	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 */	1844	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1205	}	1845	}
1206	else if (ent->type == EIO_DT_DIR)	1846	else if (ent->type == EIO_DT_DIR)
1207	ent->score = 100;	1847	ent->score = 0;
1208	}	1848	}
1209	}	1849	}
1210		1850
1211	namesoffs += len;	1851	namesoffs += len;
1212	++dentoffs;	1852	++dentoffs;
1213	}	1853	}
		1854
		1855	if (EIO_CANCELLED (req))
		1856	{
		1857	errno = ECANCELED;
		1858	break;
		1859	}
		1860
		1861	#ifdef _WIN32
		1862	if (!FindNextFile (dirp, &entp))
		1863	{
		1864	FindClose (dirp);
		1865	dirp = 0;
		1866	}
		1867	#endif
1214	}	1868	}
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	}	1869	}
1248		1870
1249	/*****************************************************************************/	1871	/*****************************************************************************/
1250		1872
1251	#define ALLOC(len) \	1873	#define ALLOC(len) \
…		…
1267	{	1889	{
1268	ETP_REQ *req;	1890	ETP_REQ *req;
1269	struct timespec ts;	1891	struct timespec ts;
1270	etp_worker *self = (etp_worker *)thr_arg;	1892	etp_worker *self = (etp_worker *)thr_arg;
1271		1893
1272	/* try to distribute timeouts somewhat randomly */	1894	/* try to distribute timeouts somewhat evenly */
1273	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1895	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
1274		1896
1275	for (;;)	1897	for (;;)
1276	{	1898	{
		1899	ts.tv_sec = 0;
		1900
1277	X_LOCK (reqlock);	1901	X_LOCK (reqlock);
1278		1902
1279	for (;;)	1903	for (;;)
1280	{	1904	{
1281	self->req = req = reqq_shift (&req_queue);	1905	self->req = req = reqq_shift (&req_queue);
1282		1906
1283	if (req)	1907	if (req)
1284	break;	1908	break;
1285		1909
		1910	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
		1911	{
		1912	X_UNLOCK (reqlock);
		1913	X_LOCK (wrklock);
		1914	--started;
		1915	X_UNLOCK (wrklock);
		1916	goto quit;
		1917	}
		1918
1286	++idle;	1919	++idle;
1287		1920
1288	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1921	if (idle <= max_idle)
1289	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1922	/* we are allowed to idle, so do so without any timeout */
		1923	X_COND_WAIT (reqwait, reqlock);
		1924	else
1290	{	1925	{
1291	if (idle > max_idle)	1926	/* initialise timeout once */
1292	{	1927	if (!ts.tv_sec)
1293	--idle;	1928	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		1929
1301	/* we are allowed to idle, so do so without any timeout */
1302	X_COND_WAIT (reqwait, reqlock);	1930	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
		1931	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
1303	}	1932	}
1304		1933
1305	--idle;	1934	--idle;
1306	}	1935	}
1307		1936
…		…
1310	X_UNLOCK (reqlock);	1939	X_UNLOCK (reqlock);
1311		1940
1312	if (req->type < 0)	1941	if (req->type < 0)
1313	goto quit;	1942	goto quit;
1314		1943
1315	if (!EIO_CANCELLED (req))
1316	ETP_EXECUTE (self, req);	1944	ETP_EXECUTE (self, req);
1317		1945
1318	X_LOCK (reslock);	1946	X_LOCK (reslock);
1319		1947
1320	++npending;	1948	++npending;
1321		1949
…		…
1336	return 0;	1964	return 0;
1337	}	1965	}
1338		1966
1339	/*****************************************************************************/	1967	/*****************************************************************************/
1340		1968
		1969	int ecb_cold
1341	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1970	eio_init (void (*want_poll)(void), void (*done_poll)(void))
1342	{	1971	{
		1972	#if !HAVE_PREADWRITE
		1973	X_MUTEX_CREATE (preadwritelock);
		1974	#endif
		1975
1343	return etp_init (want_poll, done_poll);	1976	return etp_init (want_poll, done_poll);
1344	}	1977	}
1345		1978
		1979	ecb_inline void
1346	static void eio_api_destroy (eio_req *req)	1980	eio_api_destroy (eio_req *req)
1347	{	1981	{
1348	free (req);	1982	free (req);
1349	}	1983	}
1350		1984
1351	#define REQ(rtype) \	1985	#define REQ(rtype) \
…		…
1370	{ \	2004	{ \
1371	eio_api_destroy (req); \	2005	eio_api_destroy (req); \
1372	return 0; \	2006	return 0; \
1373	}	2007	}
1374		2008
		2009	static void
1375	static void eio_execute (etp_worker *self, eio_req *req)	2010	eio_execute (etp_worker *self, eio_req *req)
1376	{	2011	{
1377	errno = 0;	2012	if (ecb_expect_false (EIO_CANCELLED (req)))
		2013	{
		2014	req->result = -1;
		2015	req->errorno = ECANCELED;
		2016	return;
		2017	}
1378		2018
1379	switch (req->type)	2019	switch (req->type)
1380	{	2020	{
1381	case EIO_READ: ALLOC (req->size);	2021	case EIO_READ: ALLOC (req->size);
1382	req->result = req->offs >= 0	2022	req->result = req->offs >= 0
…		…
1394	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	2034	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1395	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;	2035	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
1396	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	2036	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1397	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;	2037	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
1398		2038
		2039	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		2040	req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		2041	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		2042	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		2043
1399	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;	2044	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;	2045	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;	2046	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;	2047	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;	2048	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
…		…
1410	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;	2055	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
1411	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;	2056	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;	2057	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
1413	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;	2058	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
1414	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;	2059	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;	2060	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
1416		2061
		2062	case EIO_REALPATH: eio__realpath (req, self); break;
		2063
1417	case EIO_READLINK: ALLOC (NAME_MAX);	2064	case EIO_READLINK: ALLOC (PATH_MAX);
1418	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;	2065	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
1419		2066
1420	case EIO_SYNC: req->result = 0; sync (); break;	2067	case EIO_SYNC: req->result = 0; sync (); break;
1421	case EIO_FSYNC: req->result = fsync (req->int1); break;	2068	case EIO_FSYNC: req->result = fsync (req->int1); break;
1422	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;	2069	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
1423	case EIO_MSYNC: req->result = msync (req->ptr2, req->size, req->int1); break;	2070	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
		2071	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
1424	case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break;	2072	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
		2073	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;	2074	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		2075	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
1426		2076
1427	case EIO_READDIR: eio__scandir (req, self); break;	2077	case EIO_READDIR: eio__scandir (req, self); break;
1428		2078
1429	case EIO_BUSY:	2079	case EIO_BUSY:
1430	#ifdef _WIN32	2080	#ifdef _WIN32
1431	Sleep (req->nv1 * 1000.);	2081	Sleep (req->nv1 * 1e3);
1432	#else	2082	#else
1433	{	2083	{
1434	struct timeval tv;	2084	struct timeval tv;
1435		2085
1436	tv.tv_sec = req->nv1;	2086	tv.tv_sec = req->nv1;
1437	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;	2087	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6;
1438		2088
1439	req->result = select (0, 0, 0, 0, &tv);	2089	req->result = select (0, 0, 0, 0, &tv);
1440	}	2090	}
1441	#endif	2091	#endif
1442	break;	2092	break;
…		…
1457	times = tv;	2107	times = tv;
1458	}	2108	}
1459	else	2109	else
1460	times = 0;	2110	times = 0;
1461		2111
1462
1463	req->result = req->type == EIO_FUTIME	2112	req->result = req->type == EIO_FUTIME
1464	? futimes (req->int1, times)	2113	? futimes (req->int1, times)
1465	: utimes (req->ptr1, times);	2114	: utimes (req->ptr1, times);
1466	}	2115	}
1467	break;	2116	break;
…		…
1472	case EIO_NOP:	2121	case EIO_NOP:
1473	req->result = 0;	2122	req->result = 0;
1474	break;	2123	break;
1475		2124
1476	case EIO_CUSTOM:	2125	case EIO_CUSTOM:
1477	((void (*)(eio_req *))req->feed) (req);	2126	req->feed (req);
1478	break;	2127	break;
1479		2128
1480	default:	2129	default:
		2130	errno = ENOSYS;
1481	req->result = -1;	2131	req->result = -1;
1482	break;	2132	break;
1483	}	2133	}
1484		2134
1485	req->errorno = errno;	2135	req->errorno = errno;
…		…
1515	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)	2165	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
1516	{	2166	{
1517	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;	2167	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
1518	}	2168	}
1519		2169
		2170	eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data)
		2171	{
		2172	REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND;
		2173	}
		2174
		2175	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
		2176	{
		2177	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
		2178	}
		2179
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)	2180	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	{	2181	{
1522	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;	2182	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
1523	}	2183	}
1524		2184
		2185	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
		2186	{
		2187	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
		2188	}
		2189
1525	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)	2190	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1526	{	2191	{
1527	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;	2192	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1528	}	2193	}
1529		2194
…		…
1550	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)	2215	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
1551	{	2216	{
1552	REQ (EIO_FSTAT); req->int1 = fd; SEND;	2217	REQ (EIO_FSTAT); req->int1 = fd; SEND;
1553	}	2218	}
1554		2219
		2220	eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data)
		2221	{
		2222	REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
		2223	}
		2224
1555	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)	2225	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
1556	{	2226	{
1557	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;	2227	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
1558	}	2228	}
1559		2229
…		…
1565	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)	2235	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
1566	{	2236	{
1567	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;	2237	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1568	}	2238	}
1569		2239
1570	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)	2240	eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1571	{	2241	{
1572	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2242	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1573	}	2243	}
1574		2244
1575	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)	2245	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)	2265	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
1596	{	2266	{
1597	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;	2267	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1598	}	2268	}
1599		2269
1600	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)	2270	eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1601	{	2271	{
1602	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2272	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1603	}	2273	}
1604		2274
1605	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)	2275	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)	2291	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
1622	{	2292	{
1623	return eio__1path (EIO_READLINK, path, pri, cb, data);	2293	return eio__1path (EIO_READLINK, path, pri, cb, data);
1624	}	2294	}
1625		2295
		2296	eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
		2297	{
		2298	return eio__1path (EIO_REALPATH, path, pri, cb, data);
		2299	}
		2300
1626	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)	2301	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
1627	{	2302	{
1628	return eio__1path (EIO_STAT, path, pri, cb, data);	2303	return eio__1path (EIO_STAT, path, pri, cb, data);
1629	}	2304	}
1630		2305
1631	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)	2306	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
1632	{	2307	{
1633	return eio__1path (EIO_LSTAT, path, pri, cb, data);	2308	return eio__1path (EIO_LSTAT, path, pri, cb, data);
1634	}	2309	}
1635		2310
		2311	eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data)
		2312	{
		2313	return eio__1path (EIO_STATVFS, path, pri, cb, data);
		2314	}
		2315
1636	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)	2316	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
1637	{	2317	{
1638	return eio__1path (EIO_UNLINK, path, pri, cb, data);	2318	return eio__1path (EIO_UNLINK, path, pri, cb, data);
1639	}	2319	}
1640		2320
…		…
1648	REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;	2328	REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
1649	}	2329	}
1650		2330
1651	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)	2331	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1652	{	2332	{
1653	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND;	2333	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND;
1654	}	2334	}
1655		2335
1656	static eio_req *	2336	static eio_req *
1657	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)	2337	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1658	{	2338	{
…		…
1682	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)	2362	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1683	{	2363	{
1684	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);	2364	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
1685	}	2365	}
1686		2366
1687	eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data)	2367	eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
1688	{	2368	{
1689	REQ (EIO_CUSTOM); req->feed = (void (*)(eio_req *))execute; SEND;	2369	REQ (EIO_CUSTOM); req->feed = execute; SEND;
1690	}	2370	}
1691		2371
1692	#endif	2372	#endif
1693		2373
1694	eio_req *eio_grp (eio_cb cb, void *data)	2374	eio_req *eio_grp (eio_cb cb, void *data)
…		…
1703	#undef SEND	2383	#undef SEND
1704		2384
1705	/*****************************************************************************/	2385	/*****************************************************************************/
1706	/* grp functions */	2386	/* grp functions */
1707		2387
		2388	void
1708	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	2389	eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1709	{	2390	{
1710	grp->int2 = limit;	2391	grp->int2 = limit;
1711	grp->feed = feed;	2392	grp->feed = feed;
1712		2393
1713	grp_try_feed (grp);	2394	grp_try_feed (grp);
1714	}	2395	}
1715		2396
		2397	void
1716	void eio_grp_limit (eio_req *grp, int limit)	2398	eio_grp_limit (eio_req *grp, int limit)
1717	{	2399	{
1718	grp->int2 = limit;	2400	grp->int2 = limit;
1719		2401
1720	grp_try_feed (grp);	2402	grp_try_feed (grp);
1721	}	2403	}
1722		2404
		2405	void
1723	void eio_grp_add (eio_req *grp, eio_req *req)	2406	eio_grp_add (eio_req *grp, eio_req *req)
1724	{	2407	{
1725	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2408	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
1726		2409
1727	grp->flags |= EIO_FLAG_GROUPADD;	2410	grp->flags |= EIO_FLAG_GROUPADD;
1728		2411
…		…
1739	}	2422	}
1740		2423
1741	/*****************************************************************************/	2424	/*****************************************************************************/
1742	/* misc garbage */	2425	/* misc garbage */
1743		2426
		2427	eio_ssize_t
1744	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)	2428	eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
1745	{	2429	{
1746	etp_worker wrk;	2430	etp_worker wrk;
		2431	eio_ssize_t ret;
1747		2432
1748	wrk.dbuf = 0;	2433	wrk.dbuf = 0;
1749		2434
1750	eio__sendfile (ofd, ifd, offset, count, &wrk);	2435	ret = eio__sendfile (ofd, ifd, offset, count, &wrk);
1751		2436
1752	if (wrk.dbuf)	2437	if (wrk.dbuf)
1753	free (wrk.dbuf);	2438	free (wrk.dbuf);
1754	}
1755		2439
		2440	return ret;
		2441	}
		2442

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