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Comparing libeio/eio.c (file contents):
Revision 1.95 by root, Tue Jul 19 04:56:43 2011 UTC vs.
Revision 1.144 by root, Tue Dec 27 09:58:44 2016 UTC

1	/*	1	/*
2	* libeio implementation	2	* libeio implementation
3	*	3	*
4	* Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libeio@schmorp.de>	4	* Copyright (c) 2007,2008,2009,2010,2011,2012,2013,2016 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	*
10	* 1. Redistributions of source code must retain the above copyright notice,	10	* 1. Redistributions of source code must retain the above copyright notice,
11	* this list of conditions and the following disclaimer.	11	* this list of conditions and the following disclaimer.
12	*	12	*
13	* 2. Redistributions in binary form must reproduce the above copyright	13	* 2. Redistributions in binary form must reproduce the above copyright
14	* notice, this list of conditions and the following disclaimer in the	14	* notice, this list of conditions and the following disclaimer in the
15	* documentation and/or other materials provided with the distribution.	15	* documentation and/or other materials provided with the distribution.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-	18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO	19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-	20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,	21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
…		…
42	#endif	42	#endif
43		43
44	#include "eio.h"	44	#include "eio.h"
45	#include "ecb.h"	45	#include "ecb.h"
46		46
47	#ifdef EIO_STACKSIZE
48	# define XTHREAD_STACKSIZE EIO_STACKSIZE
49	#endif
50	#include "xthread.h"
51
52	#include <errno.h>	47	#include <errno.h>
53	#include <stddef.h>	48	#include <stddef.h>
54	#include <stdlib.h>	49	#include <stdlib.h>
55	#include <string.h>	50	#include <string.h>
56	#include <errno.h>	51	#include <errno.h>
…		…
105	#ifdef _WIN32	100	#ifdef _WIN32
106		101
107	#undef PAGESIZE	102	#undef PAGESIZE
108	#define PAGESIZE 4096 /* GetSystemInfo? */	103	#define PAGESIZE 4096 /* GetSystemInfo? */
109		104
		105	/* TODO: look at how perl does stat (non-sloppy), unlink (ro-files), utime, link */
		106
110	#ifdef EIO_STRUCT_STATI64	107	#ifdef EIO_STRUCT_STATI64
		108	/* look at perl's non-sloppy stat */
111	#define stat(path,buf) _stati64 (path,buf)	109	#define stat(path,buf) _stati64 (path,buf)
112	#define fstat(fd,buf) _fstati64 (fd,buf)	110	#define fstat(fd,buf) _fstati64 (fd,buf)
113	#endif	111	#endif
114	#define lstat(path,buf) stat (path,buf)	112	#define lstat(path,buf) stat (path,buf)
115	#define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))	113	#define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
…		…
117	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))	115	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
118		116
119	#define chmod(path,mode) _chmod (path, mode)	117	#define chmod(path,mode) _chmod (path, mode)
120	#define dup(fd) _dup (fd)	118	#define dup(fd) _dup (fd)
121	#define dup2(fd1,fd2) _dup2 (fd1, fd2)	119	#define dup2(fd1,fd2) _dup2 (fd1, fd2)
		120	#define pipe(fds) _pipe (fds, 4096, O_BINARY)
122		121
		122	#define fcntl(fd,cmd,arg) EIO_ENOSYS ()
		123	#define ioctl(fd,cmd,arg) EIO_ENOSYS ()
123	#define fchmod(fd,mode) EIO_ENOSYS ()	124	#define fchmod(fd,mode) EIO_ENOSYS ()
124	#define chown(path,uid,gid) EIO_ENOSYS ()	125	#define chown(path,uid,gid) EIO_ENOSYS ()
125	#define fchown(fd,uid,gid) EIO_ENOSYS ()	126	#define fchown(fd,uid,gid) EIO_ENOSYS ()
126	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */	127	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
127	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */	128	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
…		…
129	#define sync() EIO_ENOSYS ()	130	#define sync() EIO_ENOSYS ()
130	#define readlink(path,buf,s) EIO_ENOSYS ()	131	#define readlink(path,buf,s) EIO_ENOSYS ()
131	#define statvfs(path,buf) EIO_ENOSYS ()	132	#define statvfs(path,buf) EIO_ENOSYS ()
132	#define fstatvfs(fd,buf) EIO_ENOSYS ()	133	#define fstatvfs(fd,buf) EIO_ENOSYS ()
133		134
		135	#define pread(fd,buf,count,offset) eio__pread (fd, buf, count, offset)
		136	#define pwrite(fd,buf,count,offset) eio__pwrite (fd, buf, count, offset)
		137
		138	#if __GNUC__
		139	typedef long long eio_off_t; /* signed for compatibility to msvc */
		140	#else
		141	typedef __int64 eio_off_t; /* unsigned not supported by msvc */
		142	#endif
		143
		144	static eio_ssize_t
		145	eio__pread (int fd, void *buf, eio_ssize_t count, eio_off_t offset)
		146	{
		147	OVERLAPPED o = { 0 };
		148	DWORD got;
		149
		150	o.Offset = offset;
		151	o.OffsetHigh = offset >> 32;
		152
		153	return ReadFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o)
		154	? got : -1;
		155	}
		156
		157	static eio_ssize_t
		158	eio__pwrite (int fd, void *buf, eio_ssize_t count, eio_off_t offset)
		159	{
		160	OVERLAPPED o = { 0 };
		161	DWORD got;
		162
		163	o.Offset = offset;
		164	o.OffsetHigh = offset >> 32;
		165
		166	return WriteFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o)
		167	? got : -1;
		168	}
		169
		170	/* rename() uses MoveFile, which fails to overwrite */
		171	#define rename(old,neu) eio__rename (old, neu)
		172
		173	static int
		174	eio__rename (const char *old, const char *neu)
		175	{
		176	if (MoveFileEx (old, neu, MOVEFILE_REPLACE_EXISTING))
		177	return 0;
		178
		179	/* should steal _dosmaperr */
		180	switch (GetLastError ())
		181	{
		182	case ERROR_FILE_NOT_FOUND:
		183	case ERROR_PATH_NOT_FOUND:
		184	case ERROR_INVALID_DRIVE:
		185	case ERROR_NO_MORE_FILES:
		186	case ERROR_BAD_NETPATH:
		187	case ERROR_BAD_NET_NAME:
		188	case ERROR_BAD_PATHNAME:
		189	case ERROR_FILENAME_EXCED_RANGE:
		190	errno = ENOENT;
		191	break;
		192
		193	default:
		194	errno = EACCES;
		195	break;
		196	}
		197
		198	return -1;
		199	}
		200
134	/* we could even stat and see if it exists */	201	/* we could even stat and see if it exists */
135	static int	202	static int
136	symlink (const char *old, const char *neu)	203	symlink (const char *old, const char *neu)
137	{	204	{
138	#if WINVER >= 0x0600	205	#if WINVER >= 0x0600
		206	int flags;
		207
		208	/* This tries out all combinations of SYMBOLIC_LINK_FLAG_DIRECTORY
		209	* and SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE,
		210	* with directory first.
		211	*/
		212	for (flags = 3; flags >= 0; --flags)
139	if (CreateSymbolicLink (neu, old, 1))	213	if (CreateSymbolicLink (neu, old, flags))
140	return 0;	214	return 0;
141
142	if (CreateSymbolicLink (neu, old, 0))
143	return 0;
144	#endif	215	#endif
145		216
146	return EIO_ERRNO (ENOENT, -1);	217	return EIO_ERRNO (ENOENT, -1);
147	}	218	}
148		219
149	/* POSIX API only */	220	/* POSIX API only, causing trouble for win32 apps */
150	#define CreateHardLink(neu,old,flags) 0	221	#define CreateHardLink(neu,old,flags) 0 /* not really creating hardlink, still using relative paths? */
151	#define CreateSymbolicLink(neu,old,flags) 0	222	#define CreateSymbolicLink(neu,old,flags) 0 /* vista+ only */
152		223
153	struct statvfs	224	struct statvfs
154	{	225	{
155	int dummy;	226	int dummy;
156	};	227	};
…		…
162		233
163	#else	234	#else
164		235
165	#include <sys/time.h>	236	#include <sys/time.h>
166	#include <sys/select.h>	237	#include <sys/select.h>
167	#include <sys/statvfs.h>
168	#include <unistd.h>	238	#include <unistd.h>
169	#include <utime.h>
170	#include <signal.h>	239	#include <signal.h>
171	#include <dirent.h>	240	#include <dirent.h>
		241
		242	#ifdef ANDROID
		243	#include <sys/vfs.h>
		244	#define statvfs statfs
		245	#define fstatvfs fstatfs
		246	#include <asm/page.h> /* supposedly limits.h does #define PAGESIZE PAGESIZE */
		247	#else
		248	#include <sys/statvfs.h>
		249	#endif
172		250
173	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES	251	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
174	#include <sys/mman.h>	252	#include <sys/mman.h>
175	#endif	253	#endif
176		254
177	#define D_NAME(entp) entp->d_name	255	#define D_NAME(entp) entp->d_name
178		256
179	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */	257	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
180	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__	258	#if __FreeBSD__ || __NetBSD__ || __OpenBSD__
181	#define _DIRENT_HAVE_D_TYPE /* sigh */	259	#define _DIRENT_HAVE_D_TYPE /* sigh */
182	#define D_INO(de) (de)->d_fileno	260	#define D_INO(de) (de)->d_fileno
183	#define D_NAMLEN(de) (de)->d_namlen	261	#define D_NAMLEN(de) (de)->d_namlen
184	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600	262	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
185	#define D_INO(de) (de)->d_ino	263	#define D_INO(de) (de)->d_ino
…		…
196		274
197	#ifndef EIO_STRUCT_DIRENT	275	#ifndef EIO_STRUCT_DIRENT
198	#define EIO_STRUCT_DIRENT struct dirent	276	#define EIO_STRUCT_DIRENT struct dirent
199	#endif	277	#endif
200		278
		279	#endif
		280
		281	#if HAVE_UTIMES
		282	# include <utime.h>
		283	#endif
		284
		285	#if HAVE_SYS_SYSCALL_H
		286	# include <sys/syscall.h>
201	#endif	287	#endif
202		288
203	#if HAVE_SENDFILE	289	#if HAVE_SENDFILE
204	# if __linux	290	# if __linux
205	# include <sys/sendfile.h>	291	# include <sys/sendfile.h>
…		…
230	# define NAME_MAX 4096	316	# define NAME_MAX 4096
231	#endif	317	#endif
232		318
233	/* used for readlink etc. */	319	/* used for readlink etc. */
234	#ifndef PATH_MAX	320	#ifndef PATH_MAX
235	# define PATH_MAX 4096	321	# define PATH_MAX 0
236	#endif	322	#endif
		323
		324	#ifndef EIO_PATH_MIN
		325	# define EIO_PATH_MIN 8160
		326	#endif
		327
		328	#define EIO_PATH_MAX (PATH_MAX <= EIO_PATH_MIN ? EIO_PATH_MIN : PATH_MAX)
237		329
238	/* buffer size for various temporary buffers */	330	/* buffer size for various temporary buffers */
239	#define EIO_BUFSIZE 65536	331	#define EIO_BUFSIZE 65536
240		332
241	#define dBUF \	333	#define dBUF \
242	char *eio_buf = malloc (EIO_BUFSIZE); \	334	char *eio_buf = malloc (EIO_BUFSIZE); \
243	errno = ENOMEM; \	335	errno = ENOMEM; \
244	if (!eio_buf) \	336	if (!eio_buf) \
245	return -1	337	return -1
246		338
247	#define FUBd \	339	#define FUBd \
248	free (eio_buf)	340	free (eio_buf)
249		341
250	#define EIO_TICKS ((1000000 + 1023) >> 10)	342	/*****************************************************************************/
		343
		344	struct etp_tmpbuf;
		345
		346	#if _POSIX_VERSION >= 200809L
		347	#define HAVE_AT 1
		348	#define WD2FD(wd) ((wd) ? (wd)->fd : AT_FDCWD)
		349	#ifndef O_SEARCH
		350	#define O_SEARCH O_RDONLY
		351	#endif
		352	#else
		353	#define HAVE_AT 0
		354	static const char *wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path);
		355	#endif
		356
		357	struct eio_pwd
		358	{
		359	#if HAVE_AT
		360	int fd;
		361	#endif
		362	int len;
		363	char str[1]; /* actually, a 0-terminated canonical path */
		364	};
		365
		366	/*****************************************************************************/
251		367
252	#define ETP_PRI_MIN EIO_PRI_MIN	368	#define ETP_PRI_MIN EIO_PRI_MIN
253	#define ETP_PRI_MAX EIO_PRI_MAX	369	#define ETP_PRI_MAX EIO_PRI_MAX
254		370
		371	#define ETP_TYPE_QUIT -1
		372	#define ETP_TYPE_GROUP EIO_GROUP
		373
		374	static void eio_nop_callback (void) { }
		375	static void (*eio_want_poll_cb)(void) = eio_nop_callback;
		376	static void (*eio_done_poll_cb)(void) = eio_nop_callback;
		377
		378	#define ETP_WANT_POLL(pool) eio_want_poll_cb ()
		379	#define ETP_DONE_POLL(pool) eio_done_poll_cb ()
		380
255	struct etp_worker;	381	struct etp_worker;
256
257	#define ETP_REQ eio_req	382	#define ETP_REQ eio_req
258	#define ETP_DESTROY(req) eio_destroy (req)	383	#define ETP_DESTROY(req) eio_destroy (req)
259	static int eio_finish (eio_req *req);	384	static int eio_finish (eio_req *req);
260	#define ETP_FINISH(req) eio_finish (req)	385	#define ETP_FINISH(req) eio_finish (req)
261	static void eio_execute (struct etp_worker *self, eio_req *req);	386	static void eio_execute (struct etp_worker *self, eio_req *req);
262	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)	387	#define ETP_EXECUTE(wrk,req) eio_execute (wrk, req)
263		388
264	/*****************************************************************************/	389	#include "etp.c"
265		390
266	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)	391	static struct etp_pool eio_pool;
267		392	#define EIO_POOL (&eio_pool)
268	/* calculate time difference in ~1/EIO_TICKS of a second */
269	ecb_inline int
270	tvdiff (struct timeval *tv1, struct timeval *tv2)
271	{
272	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
273	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
274	}
275
276	static unsigned int started, idle, wanted = 4;
277
278	static void (*want_poll_cb) (void);
279	static void (*done_poll_cb) (void);
280
281	static unsigned int max_poll_time; /* reslock */
282	static unsigned int max_poll_reqs; /* reslock */
283
284	static volatile unsigned int nreqs; /* reqlock */
285	static volatile unsigned int nready; /* reqlock */
286	static volatile unsigned int npending; /* reqlock */
287	static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
288	static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
289
290	static xmutex_t wrklock;
291	static xmutex_t reslock;
292	static xmutex_t reqlock;
293	static xcond_t reqwait;
294
295	#if !HAVE_PREADWRITE
296	/*
297	* make our pread/pwrite emulation safe against themselves, but not against
298	* normal read/write by using a mutex. slows down execution a lot,
299	* but that's your problem, not mine.
300	*/
301	static xmutex_t preadwritelock;
302	#endif
303
304	typedef struct etp_worker
305	{
306	/* locked by wrklock */
307	struct etp_worker *prev, *next;
308
309	xthread_t tid;
310
311	/* locked by reslock, reqlock or wrklock */
312	ETP_REQ *req; /* currently processed request */
313
314	#ifdef ETP_WORKER_COMMON
315	ETP_WORKER_COMMON
316	#endif
317	} etp_worker;
318
319	static etp_worker wrk_first; /* NOT etp */
320
321	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
322	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
323
324	/* worker threads management */
325
326	static void ecb_cold
327	etp_worker_clear (etp_worker *wrk)
328	{
329	}
330
331	static void ecb_cold
332	etp_worker_free (etp_worker *wrk)
333	{
334	wrk->next->prev = wrk->prev;
335	wrk->prev->next = wrk->next;
336
337	free (wrk);
338	}
339
340	static unsigned int
341	etp_nreqs (void)
342	{
343	int retval;
344	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
345	retval = nreqs;
346	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
347	return retval;
348	}
349
350	static unsigned int
351	etp_nready (void)
352	{
353	unsigned int retval;
354
355	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
356	retval = nready;
357	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
358
359	return retval;
360	}
361
362	static unsigned int
363	etp_npending (void)
364	{
365	unsigned int retval;
366
367	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
368	retval = npending;
369	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
370
371	return retval;
372	}
373
374	static unsigned int
375	etp_nthreads (void)
376	{
377	unsigned int retval;
378
379	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
380	retval = started;
381	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
382
383	return retval;
384	}
385
386	/*
387	* a somewhat faster data structure might be nice, but
388	* with 8 priorities this actually needs <20 insns
389	* per shift, the most expensive operation.
390	*/
391	typedef struct {
392	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
393	int size;
394	} etp_reqq;
395
396	static etp_reqq req_queue;
397	static etp_reqq res_queue;
398
399	static void ecb_noinline ecb_cold
400	reqq_init (etp_reqq *q)
401	{
402	int pri;
403
404	for (pri = 0; pri < ETP_NUM_PRI; ++pri)
405	q->qs[pri] = q->qe[pri] = 0;
406
407	q->size = 0;
408	}
409
410	static int ecb_noinline
411	reqq_push (etp_reqq *q, ETP_REQ *req)
412	{
413	int pri = req->pri;
414	req->next = 0;
415
416	if (q->qe[pri])
417	{
418	q->qe[pri]->next = req;
419	q->qe[pri] = req;
420	}
421	else
422	q->qe[pri] = q->qs[pri] = req;
423
424	return q->size++;
425	}
426
427	static ETP_REQ * ecb_noinline
428	reqq_shift (etp_reqq *q)
429	{
430	int pri;
431
432	if (!q->size)
433	return 0;
434
435	--q->size;
436
437	for (pri = ETP_NUM_PRI; pri--; )
438	{
439	eio_req *req = q->qs[pri];
440
441	if (req)
442	{
443	if (!(q->qs[pri] = (eio_req *)req->next))
444	q->qe[pri] = 0;
445
446	return req;
447	}
448	}
449
450	abort ();
451	}
452
453	static int ecb_cold
454	etp_init (void (*want_poll)(void), void (*done_poll)(void))
455	{
456	X_MUTEX_CREATE (wrklock);
457	X_MUTEX_CREATE (reslock);
458	X_MUTEX_CREATE (reqlock);
459	X_COND_CREATE (reqwait);
460
461	reqq_init (&req_queue);
462	reqq_init (&res_queue);
463
464	wrk_first.next =
465	wrk_first.prev = &wrk_first;
466
467	started = 0;
468	idle = 0;
469	nreqs = 0;
470	nready = 0;
471	npending = 0;
472
473	want_poll_cb = want_poll;
474	done_poll_cb = done_poll;
475
476	return 0;
477	}
478
479	X_THREAD_PROC (etp_proc);
480
481	static void ecb_cold
482	etp_start_thread (void)
483	{
484	etp_worker *wrk = calloc (1, sizeof (etp_worker));
485
486	/*TODO*/
487	assert (("unable to allocate worker thread data", wrk));
488
489	X_LOCK (wrklock);
490
491	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
492	{
493	wrk->prev = &wrk_first;
494	wrk->next = wrk_first.next;
495	wrk_first.next->prev = wrk;
496	wrk_first.next = wrk;
497	++started;
498	}
499	else
500	free (wrk);
501
502	X_UNLOCK (wrklock);
503	}
504
505	static void
506	etp_maybe_start_thread (void)
507	{
508	if (ecb_expect_true (etp_nthreads () >= wanted))
509	return;
510
511	/* todo: maybe use idle here, but might be less exact */
512	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
513	return;
514
515	etp_start_thread ();
516	}
517
518	static void ecb_cold
519	etp_end_thread (void)
520	{
521	eio_req *req = calloc (1, sizeof (eio_req));
522
523	req->type = -1;
524	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
525
526	X_LOCK (reqlock);
527	reqq_push (&req_queue, req);
528	X_COND_SIGNAL (reqwait);
529	X_UNLOCK (reqlock);
530
531	X_LOCK (wrklock);
532	--started;
533	X_UNLOCK (wrklock);
534	}
535
536	static int
537	etp_poll (void)
538	{
539	unsigned int maxreqs;
540	unsigned int maxtime;
541	struct timeval tv_start, tv_now;
542
543	X_LOCK (reslock);
544	maxreqs = max_poll_reqs;
545	maxtime = max_poll_time;
546	X_UNLOCK (reslock);
547
548	if (maxtime)
549	gettimeofday (&tv_start, 0);
550
551	for (;;)
552	{
553	ETP_REQ *req;
554
555	etp_maybe_start_thread ();
556
557	X_LOCK (reslock);
558	req = reqq_shift (&res_queue);
559
560	if (req)
561	{
562	--npending;
563
564	if (!res_queue.size && done_poll_cb)
565	done_poll_cb ();
566	}
567
568	X_UNLOCK (reslock);
569
570	if (!req)
571	return 0;
572
573	X_LOCK (reqlock);
574	--nreqs;
575	X_UNLOCK (reqlock);
576
577	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
578	{
579	req->int1 = 1; /* mark request as delayed */
580	continue;
581	}
582	else
583	{
584	int res = ETP_FINISH (req);
585	if (ecb_expect_false (res))
586	return res;
587	}
588
589	if (ecb_expect_false (maxreqs && !--maxreqs))
590	break;
591
592	if (maxtime)
593	{
594	gettimeofday (&tv_now, 0);
595
596	if (tvdiff (&tv_start, &tv_now) >= maxtime)
597	break;
598	}
599	}
600
601	errno = EAGAIN;
602	return -1;
603	}
604
605	static void
606	etp_cancel (ETP_REQ *req)
607	{
608	req->cancelled = 1;
609
610	eio_grp_cancel (req);
611	}
612
613	static void
614	etp_submit (ETP_REQ *req)
615	{
616	req->pri -= ETP_PRI_MIN;
617
618	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
619	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
620
621	if (ecb_expect_false (req->type == EIO_GROUP))
622	{
623	/* I hope this is worth it :/ */
624	X_LOCK (reqlock);
625	++nreqs;
626	X_UNLOCK (reqlock);
627
628	X_LOCK (reslock);
629
630	++npending;
631
632	if (!reqq_push (&res_queue, req) && want_poll_cb)
633	want_poll_cb ();
634
635	X_UNLOCK (reslock);
636	}
637	else
638	{
639	X_LOCK (reqlock);
640	++nreqs;
641	++nready;
642	reqq_push (&req_queue, req);
643	X_COND_SIGNAL (reqwait);
644	X_UNLOCK (reqlock);
645
646	etp_maybe_start_thread ();
647	}
648	}
649
650	static void ecb_cold
651	etp_set_max_poll_time (double nseconds)
652	{
653	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
654	max_poll_time = nseconds * EIO_TICKS;
655	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
656	}
657
658	static void ecb_cold
659	etp_set_max_poll_reqs (unsigned int maxreqs)
660	{
661	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
662	max_poll_reqs = maxreqs;
663	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
664	}
665
666	static void ecb_cold
667	etp_set_max_idle (unsigned int nthreads)
668	{
669	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
670	max_idle = nthreads;
671	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
672	}
673
674	static void ecb_cold
675	etp_set_idle_timeout (unsigned int seconds)
676	{
677	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
678	idle_timeout = seconds;
679	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
680	}
681
682	static void ecb_cold
683	etp_set_min_parallel (unsigned int nthreads)
684	{
685	if (wanted < nthreads)
686	wanted = nthreads;
687	}
688
689	static void ecb_cold
690	etp_set_max_parallel (unsigned int nthreads)
691	{
692	if (wanted > nthreads)
693	wanted = nthreads;
694
695	while (started > wanted)
696	etp_end_thread ();
697	}
698		393
699	/*****************************************************************************/	394	/*****************************************************************************/
700		395
701	static void	396	static void
702	grp_try_feed (eio_req *grp)	397	grp_try_feed (eio_req *grp)
703	{	398	{
704	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	399	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
705	{	400	{
706	grp->flags &= ~EIO_FLAG_GROUPADD;	401	grp->flags &= ~ETP_FLAG_GROUPADD;
707		402
708	EIO_FEED (grp);	403	EIO_FEED (grp);
709		404
710	/* stop if no progress has been made */	405	/* stop if no progress has been made */
711	if (!(grp->flags & EIO_FLAG_GROUPADD))	406	if (!(grp->flags & ETP_FLAG_GROUPADD))
712	{	407	{
713	grp->feed = 0;	408	grp->feed = 0;
714	break;	409	break;
715	}	410	}
716	}	411	}
…		…
723		418
724	/* call feeder, if applicable */	419	/* call feeder, if applicable */
725	grp_try_feed (grp);	420	grp_try_feed (grp);
726		421
727	/* finish, if done */	422	/* finish, if done */
728	if (!grp->size && grp->int1)	423	if (!grp->size && grp->flags & ETP_FLAG_DELAYED)
729	return eio_finish (grp);	424	return eio_finish (grp);
730	else	425	else
731	return 0;	426	return 0;
732	}	427	}
733		428
…		…
769	}	464	}
770		465
771	void	466	void
772	eio_grp_cancel (eio_req *grp)	467	eio_grp_cancel (eio_req *grp)
773	{	468	{
774	for (grp = grp->grp_first; grp; grp = grp->grp_next)	469	etp_grp_cancel (EIO_POOL, grp);
775	eio_cancel (grp);
776	}	470	}
777		471
778	void	472	void
779	eio_cancel (eio_req *req)	473	eio_cancel (eio_req *req)
780	{	474	{
781	etp_cancel (req);	475	etp_cancel (EIO_POOL, req);
782	}	476	}
783		477
784	void	478	void
785	eio_submit (eio_req *req)	479	eio_submit (eio_req *req)
786	{	480	{
787	etp_submit (req);	481	etp_submit (EIO_POOL, req);
788	}	482	}
789		483
790	unsigned int	484	unsigned int
791	eio_nreqs (void)	485	eio_nreqs (void)
792	{	486	{
793	return etp_nreqs ();	487	return etp_nreqs (EIO_POOL);
794	}	488	}
795		489
796	unsigned int	490	unsigned int
797	eio_nready (void)	491	eio_nready (void)
798	{	492	{
799	return etp_nready ();	493	return etp_nready (EIO_POOL);
800	}	494	}
801		495
802	unsigned int	496	unsigned int
803	eio_npending (void)	497	eio_npending (void)
804	{	498	{
805	return etp_npending ();	499	return etp_npending (EIO_POOL);
806	}	500	}
807		501
808	unsigned int ecb_cold	502	unsigned int ecb_cold
809	eio_nthreads (void)	503	eio_nthreads (void)
810	{	504	{
811	return etp_nthreads ();	505	return etp_nthreads (EIO_POOL);
812	}	506	}
813		507
814	void ecb_cold	508	void ecb_cold
815	eio_set_max_poll_time (double nseconds)	509	eio_set_max_poll_time (double nseconds)
816	{	510	{
817	etp_set_max_poll_time (nseconds);	511	etp_set_max_poll_time (EIO_POOL, nseconds);
818	}	512	}
819		513
820	void ecb_cold	514	void ecb_cold
821	eio_set_max_poll_reqs (unsigned int maxreqs)	515	eio_set_max_poll_reqs (unsigned int maxreqs)
822	{	516	{
823	etp_set_max_poll_reqs (maxreqs);	517	etp_set_max_poll_reqs (EIO_POOL, maxreqs);
824	}	518	}
825		519
826	void ecb_cold	520	void ecb_cold
827	eio_set_max_idle (unsigned int nthreads)	521	eio_set_max_idle (unsigned int nthreads)
828	{	522	{
829	etp_set_max_idle (nthreads);	523	etp_set_max_idle (EIO_POOL, nthreads);
830	}	524	}
831		525
832	void ecb_cold	526	void ecb_cold
833	eio_set_idle_timeout (unsigned int seconds)	527	eio_set_idle_timeout (unsigned int seconds)
834	{	528	{
835	etp_set_idle_timeout (seconds);	529	etp_set_idle_timeout (EIO_POOL, seconds);
836	}	530	}
837		531
838	void ecb_cold	532	void ecb_cold
839	eio_set_min_parallel (unsigned int nthreads)	533	eio_set_min_parallel (unsigned int nthreads)
840	{	534	{
841	etp_set_min_parallel (nthreads);	535	etp_set_min_parallel (EIO_POOL, nthreads);
842	}	536	}
843		537
844	void ecb_cold	538	void ecb_cold
845	eio_set_max_parallel (unsigned int nthreads)	539	eio_set_max_parallel (unsigned int nthreads)
846	{	540	{
847	etp_set_max_parallel (nthreads);	541	etp_set_max_parallel (EIO_POOL, nthreads);
848	}	542	}
849		543
850	int eio_poll (void)	544	int eio_poll (void)
851	{	545	{
852	return etp_poll ();	546	return etp_poll (EIO_POOL);
853	}	547	}
854		548
855	/*****************************************************************************/	549	/*****************************************************************************/
856	/* work around various missing functions */	550	/* work around various missing functions */
857
858	#if !HAVE_PREADWRITE
859	# undef pread
860	# undef pwrite
861	# define pread eio__pread
862	# define pwrite eio__pwrite
863
864	static eio_ssize_t
865	eio__pread (int fd, void *buf, size_t count, off_t offset)
866	{
867	eio_ssize_t res;
868	off_t ooffset;
869
870	X_LOCK (preadwritelock);
871	ooffset = lseek (fd, 0, SEEK_CUR);
872	lseek (fd, offset, SEEK_SET);
873	res = read (fd, buf, count);
874	lseek (fd, ooffset, SEEK_SET);
875	X_UNLOCK (preadwritelock);
876
877	return res;
878	}
879
880	static eio_ssize_t
881	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
882	{
883	eio_ssize_t res;
884	off_t ooffset;
885
886	X_LOCK (preadwritelock);
887	ooffset = lseek (fd, 0, SEEK_CUR);
888	lseek (fd, offset, SEEK_SET);
889	res = write (fd, buf, count);
890	lseek (fd, ooffset, SEEK_SET);
891	X_UNLOCK (preadwritelock);
892
893	return res;
894	}
895	#endif
896		551
897	#ifndef HAVE_UTIMES	552	#ifndef HAVE_UTIMES
898		553
899	# undef utimes	554	# undef utimes
900	# define utimes(path,times) eio__utimes (path, times)	555	# define utimes(path,times) eio__utimes (path, times)
…		…
933		588
934	#if !HAVE_FDATASYNC	589	#if !HAVE_FDATASYNC
935	# undef fdatasync	590	# undef fdatasync
936	# define fdatasync(fd) fsync (fd)	591	# define fdatasync(fd) fsync (fd)
937	#endif	592	#endif
		593
		594	static int
		595	eio__syncfs (int fd)
		596	{
		597	int res;
		598
		599	#if HAVE_SYS_SYNCFS
		600	res = (int)syscall (__NR_syncfs, (int)(fd));
		601	#else
		602	res = EIO_ENOSYS ();
		603	#endif
		604
		605	if (res < 0 && errno == ENOSYS && fd >= 0)
		606	sync ();
		607
		608	return res;
		609	}
938		610
939	/* sync_file_range always needs emulation */	611	/* sync_file_range always needs emulation */
940	static int	612	static int
941	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)	613	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
942	{	614	{
…		…
965	}	637	}
966		638
967	static int	639	static int
968	eio__fallocate (int fd, int mode, off_t offset, size_t len)	640	eio__fallocate (int fd, int mode, off_t offset, size_t len)
969	{	641	{
970	#if HAVE_FALLOCATE	642	#if HAVE_LINUX_FALLOCATE
971	return fallocate (fd, mode, offset, len);	643	return fallocate (fd, mode, offset, len);
972	#else	644	#else
973	errno = ENOSYS;	645	return EIO_ENOSYS ();
974	return -1;
975	#endif	646	#endif
976	}	647	}
977		648
978	#if !HAVE_READAHEAD	649	#if !HAVE_READAHEAD
979	# undef readahead	650	# undef readahead
…		…
994	todo -= len;	665	todo -= len;
995	}	666	}
996		667
997	FUBd;	668	FUBd;
998		669
999	errno = 0;	670	/* linux's readahead basically only fails for EBADF or EINVAL (not mmappable) */
		671	/* but not for e.g. EIO or eof, so we also never fail */
1000	return count;	672	return 0;
1001	}	673	}
1002		674
1003	#endif	675	#endif
1004		676
1005	/* sendfile always needs emulation */	677	/* sendfile always needs emulation */
…		…
1040		712
1041	/* according to source inspection, this is correct, and useful behaviour */	713	/* according to source inspection, this is correct, and useful behaviour */
1042	if (sbytes)	714	if (sbytes)
1043	res = sbytes;	715	res = sbytes;
1044		716
1045	# elif defined (__APPLE__)	717	# elif defined __APPLE__
1046	off_t sbytes = count;	718	off_t sbytes = count;
1047	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);	719	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
1048		720
1049	/* according to the manpage, sbytes is always valid */	721	/* according to the manpage, sbytes is always valid */
1050	if (sbytes)	722	if (sbytes)
…		…
1077	HANDLE h = TO_SOCKET (ifd);	749	HANDLE h = TO_SOCKET (ifd);
1078	SetFilePointer (h, offset, 0, FILE_BEGIN);	750	SetFilePointer (h, offset, 0, FILE_BEGIN);
1079	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);	751	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
1080		752
1081	#else	753	#else
1082	res = -1;	754	res = EIO_ENOSYS ();
1083	errno = ENOSYS;
1084	#endif	755	#endif
1085		756
1086	/* we assume sendfile can copy at least 128mb in one go */	757	/* we assume sendfile can copy at least 128mb in one go */
1087	if (res <= 128 * 1024 * 1024)	758	if (res <= 128 * 1024 * 1024)
1088	{	759	{
…		…
1275		946
1276	/*****************************************************************************/	947	/*****************************************************************************/
1277	/* requests implemented outside eio_execute, because they are so large */	948	/* requests implemented outside eio_execute, because they are so large */
1278		949
1279	static void	950	static void
1280	eio__realpath (eio_req *req, etp_worker *self)	951	eio__lseek (eio_req *req)
1281	{	952	{
1282	char *rel = req->ptr1;	953	/* this usually gets optimised away completely, or your compiler sucks, */
		954	/* or the whence constants really are not 0, 1, 2 */
		955	int whence = req->int2 == EIO_SEEK_SET ? SEEK_SET
		956	: req->int2 == EIO_SEEK_CUR ? SEEK_CUR
		957	: req->int2 == EIO_SEEK_END ? SEEK_END
		958	: req->int2;
		959
		960	req->offs = lseek (req->int1, req->offs, whence);
		961	req->result = req->offs == (off_t)-1 ? -1 : 0;
		962	}
		963
		964	/* result will always end up in tmpbuf, there is always space for adding a 0-byte */
		965	static int
		966	eio__realpath (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
		967	{
1283	char *res;	968	char *res;
		969	const char *rel = path;
1284	char *tmp1, *tmp2;	970	char *tmp1, *tmp2;
1285	#if SYMLOOP_MAX > 32	971	#if SYMLOOP_MAX > 32
1286	int symlinks = SYMLOOP_MAX;	972	int symlinks = SYMLOOP_MAX;
1287	#else	973	#else
1288	int symlinks = 32;	974	int symlinks = 32;
1289	#endif	975	#endif
1290		976
1291	req->result = -1;
1292
1293	errno = EINVAL;	977	errno = EINVAL;
1294	if (!rel)	978	if (!rel)
1295	return;	979	return -1;
1296		980
1297	errno = ENOENT;	981	errno = ENOENT;
1298	if (!*rel)	982	if (!*rel)
1299	return;	983	return -1;
1300		984
1301	if (!req->ptr2)	985	res = etp_tmpbuf_get (tmpbuf, EIO_PATH_MAX * 3);
1302	{	986	#ifdef _WIN32
1303	X_LOCK (wrklock);	987	if (_access (rel, 4) != 0)
1304	req->flags |= EIO_FLAG_PTR2_FREE;
1305	X_UNLOCK (wrklock);
1306	req->ptr2 = malloc (PATH_MAX * 3);
1307
1308	errno = ENOMEM;
1309	if (!req->ptr2)
1310	return;	988	return -1;
1311	}
1312		989
1313	res = req->ptr2;	990	symlinks = GetFullPathName (rel, EIO_PATH_MAX * 3, res, 0);
		991
		992	errno = ENAMETOOLONG;
		993	if (symlinks >= EIO_PATH_MAX * 3)
		994	return -1;
		995
		996	errno = EIO;
		997	if (symlinks <= 0)
		998	return -1;
		999
		1000	return symlinks;
		1001
		1002	#else
1314	tmp1 = res + PATH_MAX;	1003	tmp1 = res + EIO_PATH_MAX;
1315	tmp2 = tmp1 + PATH_MAX;	1004	tmp2 = tmp1 + EIO_PATH_MAX;
1316		1005
1317	#if 0 /* disabled, the musl way to do things is just too racy */	1006	#if 0 /* disabled, the musl way to do things is just too racy */
1318	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)	1007	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
1319	/* on linux we may be able to ask the kernel */	1008	/* on linux we may be able to ask the kernel */
1320	{	1009	{
1321	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);	1010	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
1322		1011
1323	if (fd >= 0)	1012	if (fd >= 0)
1324	{	1013	{
1325	sprintf (tmp1, "/proc/self/fd/%d", fd);	1014	sprintf (tmp1, "/proc/self/fd/%d", fd);
1326	req->result = readlink (tmp1, res, PATH_MAX);	1015	req->result = readlink (tmp1, res, EIO_PATH_MAX);
		1016	/* here we should probably stat the open file and the disk file, to make sure they still match */
1327	close (fd);	1017	close (fd);
1328
1329	/* here we should probably stat the open file and the disk file, to make sure they still match */
1330		1018
1331	if (req->result > 0)	1019	if (req->result > 0)
1332	goto done;	1020	goto done;
1333	}	1021	}
1334	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)	1022	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
1335	return;	1023	return -1;
1336	}	1024	}
1337	#endif	1025	#endif
1338	#endif	1026	#endif
1339		1027
1340	if (*rel != '/')	1028	if (*rel != '/')
1341	{	1029	{
1342	if (!getcwd (res, PATH_MAX))	1030	int len;
		1031
		1032	errno = ENOENT;
		1033	if (wd == EIO_INVALID_WD)
1343	return;	1034	return -1;
		1035
		1036	if (wd == EIO_CWD)
		1037	{
		1038	if (!getcwd (res, EIO_PATH_MAX))
		1039	return -1;
		1040
		1041	len = strlen (res);
		1042	}
		1043	else
		1044	memcpy (res, wd->str, len = wd->len);
1344		1045
1345	if (res [1]) /* only use if not / */	1046	if (res [1]) /* only use if not / */
1346	res += strlen (res);	1047	res += len;
1347	}	1048	}
1348		1049
1349	while (*rel)	1050	while (*rel)
1350	{	1051	{
1351	eio_ssize_t len, linklen;	1052	eio_ssize_t len, linklen;
1352	char *beg = rel;	1053	const char *beg = rel;
1353		1054
1354	while (*rel && *rel != '/')	1055	while (*rel && *rel != '/')
1355	++rel;	1056	++rel;
1356		1057
1357	len = rel - beg;	1058	len = rel - beg;
…		…
1369		1070
1370	if (beg [1] == '.' && len == 2)	1071	if (beg [1] == '.' && len == 2)
1371	{	1072	{
1372	/* .. - back up one component, if possible */	1073	/* .. - back up one component, if possible */
1373		1074
1374	while (res != req->ptr2)	1075	while (res != tmpbuf->ptr)
1375	if (*--res == '/')	1076	if (*--res == '/')
1376	break;	1077	break;
1377		1078
1378	continue;	1079	continue;
1379	}	1080	}
1380	}	1081	}
1381		1082
1382	errno = ENAMETOOLONG;	1083	errno = ENAMETOOLONG;
1383	if (res + 1 + len + 1 >= tmp1)	1084	if (res + 1 + len + 1 >= tmp1)
1384	return;	1085	return -1;
1385		1086
1386	/* copy one component */	1087	/* copy one component */
1387	*res = '/';	1088	*res = '/';
1388	memcpy (res + 1, beg, len);	1089	memcpy (res + 1, beg, len);
1389		1090
1390	/* zero-terminate, for readlink */	1091	/* zero-terminate, for readlink */
1391	res [len + 1] = 0;	1092	res [len + 1] = 0;
1392		1093
1393	/* now check if it's a symlink */	1094	/* now check if it's a symlink */
1394	linklen = readlink (req->ptr2, tmp1, PATH_MAX);	1095	linklen = readlink (tmpbuf->ptr, tmp1, EIO_PATH_MAX);
1395		1096
1396	if (linklen < 0)	1097	if (linklen < 0)
1397	{	1098	{
1398	if (errno != EINVAL)	1099	if (errno != EINVAL)
1399	return;	1100	return -1;
1400		1101
1401	/* it's a normal directory. hopefully */	1102	/* it's a normal directory. hopefully */
1402	res += len + 1;	1103	res += len + 1;
1403	}	1104	}
1404	else	1105	else
1405	{	1106	{
1406	/* yay, it was a symlink - build new path in tmp2 */	1107	/* yay, it was a symlink - build new path in tmp2 */
1407	int rellen = strlen (rel);	1108	int rellen = strlen (rel);
1408		1109
1409	errno = ENAMETOOLONG;	1110	errno = ENAMETOOLONG;
1410	if (linklen + 1 + rellen >= PATH_MAX)	1111	if (linklen + 1 + rellen >= EIO_PATH_MAX) /* also catch linklen >= EIO_PATH_MAX */
1411	return;	1112	return -1;
1412		1113
1413	errno = ELOOP;	1114	errno = ELOOP;
1414	if (!--symlinks)	1115	if (!--symlinks)
1415	return;	1116	return -1;
1416		1117
1417	if (*tmp1 == '/')	1118	if (*tmp1 == '/')
1418	res = req->ptr2; /* symlink resolves to an absolute path */	1119	res = tmpbuf->ptr; /* symlink resolves to an absolute path */
1419		1120
1420	/* we need to be careful, as rel might point into tmp2 already */	1121	/* we need to be careful, as rel might point into tmp2 already */
1421	memmove (tmp2 + linklen + 1, rel, rellen + 1);	1122	memmove (tmp2 + linklen + 1, rel, rellen + 1);
1422	tmp2 [linklen] = '/';	1123	tmp2 [linklen] = '/';
1423	memcpy (tmp2, tmp1, linklen);	1124	memcpy (tmp2, tmp1, linklen);
…		…
1425	rel = tmp2;	1126	rel = tmp2;
1426	}	1127	}
1427	}	1128	}
1428		1129
1429	/* special case for the lone root path */	1130	/* special case for the lone root path */
1430	if (res == req->ptr2)	1131	if (res == tmpbuf->ptr)
1431	*res++ = '/';	1132	*res++ = '/';
1432		1133
1433	req->result = res - (char *)req->ptr2;	1134	return res - (char *)tmpbuf->ptr;
1434		1135	#endif
1435	done:
1436	req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */
1437	}	1136	}
1438		1137
1439	static signed char	1138	static signed char
1440	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)	1139	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
1441	{	1140	{
…		…
1629	#ifdef _WIN32	1328	#ifdef _WIN32
1630	{	1329	{
1631	int len = strlen ((const char *)req->ptr1);	1330	int len = strlen ((const char *)req->ptr1);
1632	char *path = malloc (MAX_PATH);	1331	char *path = malloc (MAX_PATH);
1633	const char *fmt;	1332	const char *fmt;
		1333	const char *reqpath = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
1634		1334
1635	if (!len)	1335	if (!len)
1636	fmt = "./*";	1336	fmt = "./*";
1637	else if (((const char *)req->ptr1)[len - 1] == '/' || ((const char *)req->ptr1)[len - 1] == '\\')	1337	else if (reqpath[len - 1] == '/' || reqpath[len - 1] == '\\')
1638	fmt = "%s*";	1338	fmt = "%s*";
1639	else	1339	else
1640	fmt = "%s/*";	1340	fmt = "%s/*";
1641		1341
1642	_snprintf (path, MAX_PATH, fmt, (const char *)req->ptr1);	1342	_snprintf (path, MAX_PATH, fmt, reqpath);
1643	dirp = FindFirstFile (path, &entp);	1343	dirp = FindFirstFile (path, &entp);
1644	free (path);	1344	free (path);
1645		1345
1646	if (dirp == INVALID_HANDLE_VALUE)	1346	if (dirp == INVALID_HANDLE_VALUE)
1647	{	1347	{
1648	dirp = 0;	1348	/* should steal _dosmaperr */
1649
1650	switch (GetLastError ())	1349	switch (GetLastError ())
1651	{	1350	{
1652	case ERROR_FILE_NOT_FOUND:	1351	case ERROR_FILE_NOT_FOUND:
1653	req->result = 0;	1352	req->result = 0;
1654	break;	1353	break;
1655		1354
1656	case ERROR_INVALID_NAME:	1355	case ERROR_INVALID_NAME:
1657	case ERROR_PATH_NOT_FOUND:	1356	case ERROR_PATH_NOT_FOUND:
1658	case ERROR_NO_MORE_FILES:	1357	case ERROR_NO_MORE_FILES:
1659	errno = ENOENT;	1358	errno = ENOENT;
1660	break;	1359	break;
1661		1360
1662	case ERROR_NOT_ENOUGH_MEMORY:	1361	case ERROR_NOT_ENOUGH_MEMORY:
1663	errno = ENOMEM;	1362	errno = ENOMEM;
1664	break;	1363	break;
1665		1364
1666	default:	1365	default:
1667	errno = EINVAL;	1366	errno = EINVAL;
1668	break;	1367	break;
1669	}	1368	}
		1369
		1370	return;
1670	}	1371	}
1671	}	1372	}
1672	#else	1373	#else
		1374	#if HAVE_AT
		1375	if (req->wd)
		1376	{
		1377	int fd = openat (WD2FD (req->wd), req->ptr1, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
		1378
		1379	if (fd < 0)
		1380	return;
		1381
		1382	dirp = fdopendir (fd);
		1383
		1384	if (!dirp)
		1385	close (fd);
		1386	}
		1387	else
1673	dirp = opendir (req->ptr1);	1388	dirp = opendir (req->ptr1);
		1389	#else
		1390	dirp = opendir (wd_expand (&self->tmpbuf, req->wd, req->ptr1));
		1391	#endif
		1392
		1393	if (!dirp)
		1394	return;
1674	#endif	1395	#endif
1675		1396
1676	if (req->flags & EIO_FLAG_PTR1_FREE)	1397	if (req->flags & EIO_FLAG_PTR1_FREE)
1677	free (req->ptr1);	1398	free (req->ptr1);
1678		1399
1679	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;	1400	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
1680	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;	1401	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
1681	req->ptr2 = names = malloc (namesalloc);	1402	req->ptr2 = names = malloc (namesalloc);
1682		1403
1683	if (dirp && names && (!flags || dents))	1404	if (!names || (flags && !dents))
		1405	return;
		1406
1684	for (;;)	1407	for (;;)
1685	{	1408	{
1686	int done;	1409	int done;
1687		1410
1688	#ifdef _WIN32	1411	#ifdef _WIN32
1689	done = !dirp;	1412	done = !dirp;
1690	#else	1413	#else
1691	errno = 0;	1414	errno = 0;
1692	entp = readdir (dirp);	1415	entp = readdir (dirp);
1693	done = !entp;	1416	done = !entp;
1694	#endif	1417	#endif
1695		1418
1696	if (done)	1419	if (done)
1697	{	1420	{
1698	#ifndef _WIN32	1421	#ifndef _WIN32
1699	int old_errno = errno;	1422	int old_errno = errno;
1700	closedir (dirp);	1423	closedir (dirp);
1701	errno = old_errno;	1424	errno = old_errno;
1702		1425
1703	if (errno)	1426	if (errno)
1704	break;	1427	break;
1705	#endif	1428	#endif
1706		1429
1707	/* sort etc. */	1430	/* sort etc. */
1708	req->int1 = flags;	1431	req->int1 = flags;
1709	req->result = dentoffs;	1432	req->result = dentoffs;
1710		1433
1711	if (flags & EIO_READDIR_STAT_ORDER)	1434	if (flags & EIO_READDIR_STAT_ORDER)
1712	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);	1435	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
1713	else if (flags & EIO_READDIR_DIRS_FIRST)	1436	else if (flags & EIO_READDIR_DIRS_FIRST)
1714	if (flags & EIO_READDIR_FOUND_UNKNOWN)	1437	if (flags & EIO_READDIR_FOUND_UNKNOWN)
1715	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */	1438	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
1716	else	1439	else
		1440	{
		1441	/* in this case, all is known, and we just put dirs first and sort them */
		1442	eio_dirent *oth = dents + dentoffs;
		1443	eio_dirent *dir = dents;
		1444
		1445	/* now partition dirs to the front, and non-dirs to the back */
		1446	/* by walking from both sides and swapping if necessary */
		1447	while (oth > dir)
		1448	{
		1449	if (dir->type == EIO_DT_DIR)
		1450	++dir;
		1451	else if ((--oth)->type == EIO_DT_DIR)
		1452	{
		1453	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
		1454
		1455	++dir;
		1456	}
		1457	}
		1458
		1459	/* now sort the dirs only (dirs all have the same score) */
		1460	eio_dent_sort (dents, dir - dents, 0, inode_bits);
		1461	}
		1462
		1463	break;
		1464	}
		1465
		1466	/* now add the entry to our list(s) */
		1467	name = D_NAME (entp);
		1468
		1469	/* skip . and .. entries */
		1470	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1471	{
		1472	int len = D_NAMLEN (entp) + 1;
		1473
		1474	while (ecb_expect_false (namesoffs + len > namesalloc))
		1475	{
		1476	namesalloc *= 2;
		1477	req->ptr2 = names = realloc (names, namesalloc);
		1478
		1479	if (!names)
		1480	break;
		1481	}
		1482
		1483	memcpy (names + namesoffs, name, len);
		1484
		1485	if (dents)
		1486	{
		1487	struct eio_dirent *ent;
		1488
		1489	if (ecb_expect_false (dentoffs == dentalloc))
1717	{	1490	{
1718	/* in this case, all is known, and we just put dirs first and sort them */	1491	dentalloc *= 2;
		1492	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
		1493
		1494	if (!dents)
		1495	break;
		1496	}
		1497
1719	eio_dirent *oth = dents + dentoffs;	1498	ent = dents + dentoffs;
1720	eio_dirent *dir = dents;
1721		1499
1722	/* now partition dirs to the front, and non-dirs to the back */	1500	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
1723	/* by walking from both sides and swapping if necessary */	1501	ent->namelen = len - 1;
1724	while (oth > dir)	1502	ent->inode = D_INO (entp);
		1503
		1504	inode_bits |= ent->inode;
		1505
		1506	switch (D_TYPE (entp))
		1507	{
		1508	default:
		1509	ent->type = EIO_DT_UNKNOWN;
		1510	flags |= EIO_READDIR_FOUND_UNKNOWN;
		1511	break;
		1512
		1513	#ifdef DT_FIFO
		1514	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
		1515	#endif
		1516	#ifdef DT_CHR
		1517	case DT_CHR: ent->type = EIO_DT_CHR; break;
		1518	#endif
		1519	#ifdef DT_MPC
		1520	case DT_MPC: ent->type = EIO_DT_MPC; break;
		1521	#endif
		1522	#ifdef DT_DIR
		1523	case DT_DIR: ent->type = EIO_DT_DIR; break;
		1524	#endif
		1525	#ifdef DT_NAM
		1526	case DT_NAM: ent->type = EIO_DT_NAM; break;
		1527	#endif
		1528	#ifdef DT_BLK
		1529	case DT_BLK: ent->type = EIO_DT_BLK; break;
		1530	#endif
		1531	#ifdef DT_MPB
		1532	case DT_MPB: ent->type = EIO_DT_MPB; break;
		1533	#endif
		1534	#ifdef DT_REG
		1535	case DT_REG: ent->type = EIO_DT_REG; break;
		1536	#endif
		1537	#ifdef DT_NWK
		1538	case DT_NWK: ent->type = EIO_DT_NWK; break;
		1539	#endif
		1540	#ifdef DT_CMP
		1541	case DT_CMP: ent->type = EIO_DT_CMP; break;
		1542	#endif
		1543	#ifdef DT_LNK
		1544	case DT_LNK: ent->type = EIO_DT_LNK; break;
		1545	#endif
		1546	#ifdef DT_SOCK
		1547	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
		1548	#endif
		1549	#ifdef DT_DOOR
		1550	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
		1551	#endif
		1552	#ifdef DT_WHT
		1553	case DT_WHT: ent->type = EIO_DT_WHT; break;
		1554	#endif
		1555	}
		1556
		1557	ent->score = 7;
		1558
		1559	if (flags & EIO_READDIR_DIRS_FIRST)
		1560	{
		1561	if (ent->type == EIO_DT_UNKNOWN)
1725	{	1562	{
1726	if (dir->type == EIO_DT_DIR)	1563	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
1727	++dir;	1564	ent->score = 1;
1728	else if ((--oth)->type == EIO_DT_DIR)	1565	else if (!strchr (name, '.')) /* absence of dots indicate likely dirs */
1729	{	1566	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1730	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
1731
1732	++dir;
1733	}
1734	}	1567	}
1735		1568	else if (ent->type == EIO_DT_DIR)
1736	/* now sort the dirs only (dirs all have the same score) */	1569	ent->score = 0;
1737	eio_dent_sort (dents, dir - dents, 0, inode_bits);
1738	}	1570	}
1739
1740	break;
1741	}
1742
1743	/* now add the entry to our list(s) */
1744	name = D_NAME (entp);
1745
1746	/* skip . and .. entries */
1747	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1748	{
1749	int len = D_NAMLEN (entp) + 1;
1750
1751	while (ecb_expect_false (namesoffs + len > namesalloc))
1752	{
1753	namesalloc *= 2;
1754	req->ptr2 = names = realloc (names, namesalloc);
1755
1756	if (!names)
1757	break;
1758	}	1571	}
1759		1572
1760	memcpy (names + namesoffs, name, len);
1761
1762	if (dents)
1763	{
1764	struct eio_dirent *ent;
1765
1766	if (ecb_expect_false (dentoffs == dentalloc))
1767	{
1768	dentalloc *= 2;
1769	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
1770
1771	if (!dents)
1772	break;
1773	}
1774
1775	ent = dents + dentoffs;
1776
1777	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
1778	ent->namelen = len - 1;
1779	ent->inode = D_INO (entp);
1780
1781	inode_bits |= ent->inode;
1782
1783	switch (D_TYPE (entp))
1784	{
1785	default:
1786	ent->type = EIO_DT_UNKNOWN;
1787	flags |= EIO_READDIR_FOUND_UNKNOWN;
1788	break;
1789
1790	#ifdef DT_FIFO
1791	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
1792	#endif
1793	#ifdef DT_CHR
1794	case DT_CHR: ent->type = EIO_DT_CHR; break;
1795	#endif
1796	#ifdef DT_MPC
1797	case DT_MPC: ent->type = EIO_DT_MPC; break;
1798	#endif
1799	#ifdef DT_DIR
1800	case DT_DIR: ent->type = EIO_DT_DIR; break;
1801	#endif
1802	#ifdef DT_NAM
1803	case DT_NAM: ent->type = EIO_DT_NAM; break;
1804	#endif
1805	#ifdef DT_BLK
1806	case DT_BLK: ent->type = EIO_DT_BLK; break;
1807	#endif
1808	#ifdef DT_MPB
1809	case DT_MPB: ent->type = EIO_DT_MPB; break;
1810	#endif
1811	#ifdef DT_REG
1812	case DT_REG: ent->type = EIO_DT_REG; break;
1813	#endif
1814	#ifdef DT_NWK
1815	case DT_NWK: ent->type = EIO_DT_NWK; break;
1816	#endif
1817	#ifdef DT_CMP
1818	case DT_CMP: ent->type = EIO_DT_CMP; break;
1819	#endif
1820	#ifdef DT_LNK
1821	case DT_LNK: ent->type = EIO_DT_LNK; break;
1822	#endif
1823	#ifdef DT_SOCK
1824	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
1825	#endif
1826	#ifdef DT_DOOR
1827	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
1828	#endif
1829	#ifdef DT_WHT
1830	case DT_WHT: ent->type = EIO_DT_WHT; break;
1831	#endif
1832	}
1833
1834	ent->score = 7;
1835
1836	if (flags & EIO_READDIR_DIRS_FIRST)
1837	{
1838	if (ent->type == EIO_DT_UNKNOWN)
1839	{
1840	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
1841	ent->score = 1;
1842	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
1843	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1844	}
1845	else if (ent->type == EIO_DT_DIR)
1846	ent->score = 0;
1847	}
1848	}
1849
1850	namesoffs += len;	1573	namesoffs += len;
1851	++dentoffs;	1574	++dentoffs;
1852	}	1575	}
1853		1576
1854	if (EIO_CANCELLED (req))	1577	if (EIO_CANCELLED (req))
1855	{	1578	{
1856	errno = ECANCELED;	1579	errno = ECANCELED;
1857	break;	1580	break;
1858	}	1581	}
1859		1582
1860	#ifdef _WIN32	1583	#ifdef _WIN32
1861	if (!FindNextFile (dirp, &entp))	1584	if (!FindNextFile (dirp, &entp))
1862	{	1585	{
1863	FindClose (dirp);	1586	FindClose (dirp);
1864	dirp = 0;	1587	dirp = 0;
1865	}	1588	}
1866	#endif	1589	#endif
1867	}	1590	}
1868	}	1591	}
		1592
		1593	/*****************************************************************************/
		1594	/* working directory stuff */
		1595	/* various deficiencies in the posix 2008 api force us to */
		1596	/* keep the absolute path in string form at all times */
		1597	/* fuck yeah. */
		1598
		1599	#if !HAVE_AT
		1600
		1601	/* a bit like realpath, but usually faster because it doesn'T have to return */
		1602	/* an absolute or canonical path */
		1603	static const char *
		1604	wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
		1605	{
		1606	if (!wd || *path == '/')
		1607	return path;
		1608
		1609	if (path [0] == '.' && !path [1])
		1610	return wd->str;
		1611
		1612	{
		1613	int l1 = wd->len;
		1614	int l2 = strlen (path);
		1615
		1616	char *res = etp_tmpbuf_get (tmpbuf, l1 + l2 + 2);
		1617
		1618	memcpy (res, wd->str, l1);
		1619	res [l1] = '/';
		1620	memcpy (res + l1 + 1, path, l2 + 1);
		1621
		1622	return res;
		1623	}
		1624	}
		1625
		1626	#endif
		1627
		1628	static eio_wd
		1629	eio__wd_open_sync (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
		1630	{
		1631	int fd;
		1632	eio_wd res;
		1633	int len = eio__realpath (tmpbuf, wd, path);
		1634
		1635	if (len < 0)
		1636	return EIO_INVALID_WD;
		1637
		1638	#if HAVE_AT
		1639	fd = openat (WD2FD (wd), path, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
		1640
		1641	if (fd < 0)
		1642	return EIO_INVALID_WD;
		1643	#endif
		1644
		1645	res = malloc (sizeof (*res) + len); /* one extra 0-byte */
		1646
		1647	#if HAVE_AT
		1648	res->fd = fd;
		1649	#endif
		1650
		1651	res->len = len;
		1652	memcpy (res->str, tmpbuf->ptr, len);
		1653	res->str [len] = 0;
		1654
		1655	return res;
		1656	}
		1657
		1658	eio_wd
		1659	eio_wd_open_sync (eio_wd wd, const char *path)
		1660	{
		1661	struct etp_tmpbuf tmpbuf = { };
		1662	wd = eio__wd_open_sync (&tmpbuf, wd, path);
		1663	free (tmpbuf.ptr);
		1664
		1665	return wd;
		1666	}
		1667
		1668	void
		1669	eio_wd_close_sync (eio_wd wd)
		1670	{
		1671	if (wd != EIO_INVALID_WD && wd != EIO_CWD)
		1672	{
		1673	#if HAVE_AT
		1674	close (wd->fd);
		1675	#endif
		1676	free (wd);
		1677	}
		1678	}
		1679
		1680	#if HAVE_AT
		1681
		1682	/* they forgot these */
		1683
		1684	static int
		1685	eio__truncateat (int dirfd, const char *path, off_t length)
		1686	{
		1687	int fd = openat (dirfd, path, O_WRONLY | O_CLOEXEC);
		1688	int res;
		1689
		1690	if (fd < 0)
		1691	return fd;
		1692
		1693	res = ftruncate (fd, length);
		1694	close (fd);
		1695	return res;
		1696	}
		1697
		1698	static int
		1699	eio__statvfsat (int dirfd, const char *path, struct statvfs *buf)
		1700	{
		1701	int fd = openat (dirfd, path, O_SEARCH | O_CLOEXEC);
		1702	int res;
		1703
		1704	if (fd < 0)
		1705	return fd;
		1706
		1707	res = fstatvfs (fd, buf);
		1708	close (fd);
		1709	return res;
		1710
		1711	}
		1712
		1713	#endif
1869		1714
1870	/*****************************************************************************/	1715	/*****************************************************************************/
1871		1716
1872	#define ALLOC(len) \	1717	#define ALLOC(len) \
1873	if (!req->ptr2) \	1718	if (!req->ptr2) \
1874	{ \	1719	{ \
1875	X_LOCK (wrklock); \	1720	X_LOCK (EIO_POOL->wrklock); \
1876	req->flags |= EIO_FLAG_PTR2_FREE; \	1721	req->flags |= EIO_FLAG_PTR2_FREE; \
1877	X_UNLOCK (wrklock); \	1722	X_UNLOCK (EIO_POOL->wrklock); \
1878	req->ptr2 = malloc (len); \	1723	req->ptr2 = malloc (len); \
1879	if (!req->ptr2) \	1724	if (!req->ptr2) \
1880	{ \	1725	{ \
1881	errno = ENOMEM; \	1726	errno = ENOMEM; \
1882	req->result = -1; \	1727	req->result = -1; \
1883	break; \	1728	break; \
1884	} \	1729	} \
1885	}	1730	}
1886		1731
1887	X_THREAD_PROC (etp_proc)
1888	{
1889	ETP_REQ *req;
1890	struct timespec ts;
1891	etp_worker *self = (etp_worker *)thr_arg;
1892
1893	/* try to distribute timeouts somewhat evenly */
1894	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
1895
1896	for (;;)
1897	{
1898	ts.tv_sec = 0;
1899
1900	X_LOCK (reqlock);
1901
1902	for (;;)
1903	{
1904	self->req = req = reqq_shift (&req_queue);
1905
1906	if (req)
1907	break;
1908
1909	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
1910	{
1911	X_UNLOCK (reqlock);
1912	X_LOCK (wrklock);
1913	--started;
1914	X_UNLOCK (wrklock);
1915	goto quit;
1916	}
1917
1918	++idle;
1919
1920	if (idle <= max_idle)
1921	/* we are allowed to idle, so do so without any timeout */
1922	X_COND_WAIT (reqwait, reqlock);
1923	else
1924	{
1925	/* initialise timeout once */
1926	if (!ts.tv_sec)
1927	ts.tv_sec = time (0) + idle_timeout;
1928
1929	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
1930	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
1931	}
1932
1933	--idle;
1934	}
1935
1936	--nready;
1937
1938	X_UNLOCK (reqlock);
1939
1940	if (req->type < 0)
1941	goto quit;
1942
1943	ETP_EXECUTE (self, req);
1944
1945	X_LOCK (reslock);
1946
1947	++npending;
1948
1949	if (!reqq_push (&res_queue, req) && want_poll_cb)
1950	want_poll_cb ();
1951
1952	self->req = 0;
1953	etp_worker_clear (self);
1954
1955	X_UNLOCK (reslock);
1956	}
1957
1958	quit:
1959	X_LOCK (wrklock);
1960	etp_worker_free (self);
1961	X_UNLOCK (wrklock);
1962
1963	return 0;
1964	}
1965
1966	/*****************************************************************************/	1732	/*****************************************************************************/
1967		1733
1968	int ecb_cold	1734	int ecb_cold
1969	eio_init (void (*want_poll)(void), void (*done_poll)(void))	1735	eio_init (void (*want_poll)(void), void (*done_poll)(void))
1970	{	1736	{
1971	#if !HAVE_PREADWRITE	1737	eio_want_poll_cb = want_poll;
1972	X_MUTEX_CREATE (preadwritelock);	1738	eio_done_poll_cb = done_poll;
1973	#endif
1974		1739
1975	return etp_init (want_poll, done_poll);	1740	return etp_init (EIO_POOL, 0, 0, 0);
1976	}	1741	}
1977		1742
1978	ecb_inline void	1743	ecb_inline void
1979	eio_api_destroy (eio_req *req)	1744	eio_api_destroy (eio_req *req)
1980	{	1745	{
1981	free (req);	1746	free (req);
1982	}	1747	}
1983		1748
1984	#define REQ(rtype) \	1749	#define REQ(rtype) \
1985	eio_req *req; \	1750	eio_req *req; \
1986	\	1751	\
1987	req = (eio_req *)calloc (1, sizeof *req); \	1752	req = (eio_req *)calloc (1, sizeof *req); \
1988	if (!req) \	1753	if (!req) \
1989	return 0; \	1754	return 0; \
…		…
2003	{ \	1768	{ \
2004	eio_api_destroy (req); \	1769	eio_api_destroy (req); \
2005	return 0; \	1770	return 0; \
2006	}	1771	}
2007		1772
		1773	#define SINGLEDOT(ptr) (0[(char *)(ptr)] == '.' && !1[(char *)(ptr)])
		1774
2008	static void	1775	static void
2009	eio_execute (etp_worker *self, eio_req *req)	1776	eio_execute (etp_worker *self, eio_req *req)
2010	{	1777	{
		1778	#if HAVE_AT
		1779	int dirfd;
		1780	#else
		1781	const char *path;
		1782	#endif
		1783
2011	if (ecb_expect_false (EIO_CANCELLED (req)))	1784	if (ecb_expect_false (EIO_CANCELLED (req)))
2012	{	1785	{
2013	req->result = -1;	1786	req->result = -1;
2014	req->errorno = ECANCELED;	1787	req->errorno = ECANCELED;
2015	return;	1788	return;
2016	}	1789	}
2017		1790
		1791	if (ecb_expect_false (req->wd == EIO_INVALID_WD))
		1792	{
		1793	req->result = -1;
		1794	req->errorno = ENOENT;
		1795	return;
		1796	}
		1797
		1798	if (req->type >= EIO_OPEN)
		1799	{
		1800	#if HAVE_AT
		1801	dirfd = WD2FD (req->wd);
		1802	#else
		1803	path = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
		1804	#endif
		1805	}
		1806
2018	switch (req->type)	1807	switch (req->type)
2019	{	1808	{
		1809	case EIO_WD_OPEN: req->wd = eio__wd_open_sync (&self->tmpbuf, req->wd, req->ptr1);
		1810	req->result = req->wd == EIO_INVALID_WD ? -1 : 0;
		1811	break;
		1812	case EIO_WD_CLOSE: req->result = 0;
		1813	eio_wd_close_sync (req->wd); break;
		1814
		1815	case EIO_SEEK: eio__lseek (req); break;
2020	case EIO_READ: ALLOC (req->size);	1816	case EIO_READ: ALLOC (req->size);
2021	req->result = req->offs >= 0	1817	req->result = req->offs >= 0
2022	? pread (req->int1, req->ptr2, req->size, req->offs)	1818	? pread (req->int1, req->ptr2, req->size, req->offs)
2023	: read (req->int1, req->ptr2, req->size); break;	1819	: read (req->int1, req->ptr2, req->size); break;
2024	case EIO_WRITE: req->result = req->offs >= 0	1820	case EIO_WRITE: req->result = req->offs >= 0
2025	? pwrite (req->int1, req->ptr2, req->size, req->offs)	1821	? pwrite (req->int1, req->ptr2, req->size, req->offs)
2026	: write (req->int1, req->ptr2, req->size); break;	1822	: write (req->int1, req->ptr2, req->size); break;
2027		1823
		1824	case EIO_FCNTL: req->result = fcntl (req->int1, (int) req->int2, req->ptr2); break;
		1825	case EIO_IOCTL: req->result = ioctl (req->int1, (unsigned long)req->int2, req->ptr2); break;
		1826
2028	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;	1827	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
2029	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break;	1828	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break;
2030		1829
		1830	#if HAVE_AT
		1831
2031	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1832	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2032	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;	1833	req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, 0); break;
2033	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1834	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1835	req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, AT_SYMLINK_NOFOLLOW); break;
		1836	case EIO_CHOWN: req->result = fchownat (dirfd, req->ptr1, req->int2, req->int3, 0); break;
		1837	case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break;
		1838	case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break;
		1839	case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break;
		1840
		1841	case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break;
		1842	case EIO_RMDIR: /* complications arise because "." cannot be removed, so we might have to expand */
		1843	req->result = req->wd && SINGLEDOT (req->ptr1)
		1844	? rmdir (req->wd->str)
		1845	: unlinkat (dirfd, req->ptr1, AT_REMOVEDIR); break;
		1846	case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break;
		1847	case EIO_RENAME: /* complications arise because "." cannot be renamed, so we might have to expand */
		1848	req->result = req->wd && SINGLEDOT (req->ptr1)
		1849	? rename (req->wd->str, req->ptr2)
		1850	: renameat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2); break;
		1851	case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break;
		1852	case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break;
		1853	case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
		1854	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		1855	req->result = eio__statvfsat (dirfd, req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		1856	case EIO_READLINK: ALLOC (EIO_PATH_MAX);
		1857	req->result = readlinkat (dirfd, req->ptr1, req->ptr2, EIO_PATH_MAX);
		1858	if (req->result == EIO_PATH_MAX)
		1859	{
		1860	req->result = -1;
		1861	errno = ENAMETOOLONG;
		1862	}
		1863	break;
		1864	case EIO_UTIME:
		1865	case EIO_FUTIME:
		1866	{
		1867	struct timespec ts[2];
		1868	struct timespec *times;
		1869
		1870	if (req->nv1 != -1. || req->nv2 != -1.)
		1871	{
		1872	ts[0].tv_sec = req->nv1;
		1873	ts[0].tv_nsec = (req->nv1 - ts[0].tv_sec) * 1e9;
		1874	ts[1].tv_sec = req->nv2;
		1875	ts[1].tv_nsec = (req->nv2 - ts[1].tv_sec) * 1e9;
		1876
		1877	times = ts;
		1878	}
		1879	else
		1880	times = 0;
		1881
		1882	req->result = req->type == EIO_FUTIME
		1883	? futimens (req->int1, times)
		1884	: utimensat (dirfd, req->ptr1, times, 0);
		1885	}
		1886	break;
		1887
		1888	#else
		1889
		1890	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1891	req->result = stat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
		1892	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2034	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;	1893	req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
		1894	case EIO_CHOWN: req->result = chown (path , req->int2, req->int3); break;
		1895	case EIO_CHMOD: req->result = chmod (path , (mode_t)req->int2); break;
		1896	case EIO_TRUNCATE: req->result = truncate (path , req->offs); break;
		1897	case EIO_OPEN: req->result = open (path , req->int1, (mode_t)req->int2); break;
		1898
		1899	case EIO_UNLINK: req->result = unlink (path ); break;
		1900	case EIO_RMDIR: req->result = rmdir (path ); break;
		1901	case EIO_MKDIR: req->result = mkdir (path , (mode_t)req->int2); break;
		1902	case EIO_RENAME: req->result = rename (path , req->ptr2); break;
		1903	case EIO_LINK: req->result = link (path , req->ptr2); break;
		1904	case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break;
		1905	case EIO_MKNOD: req->result = mknod (path , (mode_t)req->int2, (dev_t)req->offs); break;
		1906	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		1907	req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break;
		1908	case EIO_READLINK: ALLOC (EIO_PATH_MAX);
		1909	req->result = readlink (path, req->ptr2, EIO_PATH_MAX);
		1910	if (req->result == EIO_PATH_MAX)
		1911	{
		1912	req->result = -1;
		1913	errno = ENAMETOOLONG;
		1914	}
		1915	break;
		1916
		1917	case EIO_UTIME:
		1918	case EIO_FUTIME:
		1919	{
		1920	struct timeval tv[2];
		1921	struct timeval *times;
		1922
		1923	if (req->nv1 != -1. || req->nv2 != -1.)
		1924	{
		1925	tv[0].tv_sec = req->nv1;
		1926	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1e6;
		1927	tv[1].tv_sec = req->nv2;
		1928	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1e6;
		1929
		1930	times = tv;
		1931	}
		1932	else
		1933	times = 0;
		1934
		1935	req->result = req->type == EIO_FUTIME
		1936	? futimes (req->int1, times)
		1937	: utimes (req->ptr1, times);
		1938	}
		1939	break;
		1940
		1941	#endif
		1942
		1943	case EIO_REALPATH: if (0 <= (req->result = eio__realpath (&self->tmpbuf, req->wd, req->ptr1)))
		1944	{
		1945	ALLOC (req->result);
		1946	memcpy (req->ptr2, self->tmpbuf.ptr, req->result);
		1947	}
		1948	break;
		1949
2035	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1950	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2036	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;	1951	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
2037		1952
2038	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2039	req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
2040	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));	1953	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2041	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;	1954	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
2042		1955
2043	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
2044	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;	1956	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
2045	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
2046	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;	1957	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
2047	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
2048	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;	1958	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
2049		1959
2050	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
2051	case EIO_CLOSE: req->result = close (req->int1); break;	1960	case EIO_CLOSE: req->result = close (req->int1); break;
2052	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;	1961	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
2053	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
2054	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
2055	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
2056	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
2057	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
2058	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
2059	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
2060
2061	case EIO_REALPATH: eio__realpath (req, self); break;
2062
2063	case EIO_READLINK: ALLOC (PATH_MAX);
2064	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
2065
2066	case EIO_SYNC: req->result = 0; sync (); break;	1962	case EIO_SYNC: req->result = 0; sync (); break;
2067	case EIO_FSYNC: req->result = fsync (req->int1); break;	1963	case EIO_FSYNC: req->result = fsync (req->int1); break;
2068	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;	1964	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		1965	case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break;
		1966	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
2069	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;	1967	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
2070	case EIO_MTOUCH: req->result = eio__mtouch (req); break;	1968	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
2071	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;	1969	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
2072	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;	1970	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
2073	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
2074	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;	1971	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
2075		1972
2076	case EIO_READDIR: eio__scandir (req, self); break;	1973	case EIO_READDIR: eio__scandir (req, self); break;
2077		1974
2078	case EIO_BUSY:	1975	case EIO_BUSY:
…		…
2088	req->result = select (0, 0, 0, 0, &tv);	1985	req->result = select (0, 0, 0, 0, &tv);
2089	}	1986	}
2090	#endif	1987	#endif
2091	break;	1988	break;
2092		1989
2093	case EIO_UTIME:	1990	#if 0
2094	case EIO_FUTIME:
2095	{
2096	struct timeval tv[2];
2097	struct timeval *times;
2098
2099	if (req->nv1 != -1. || req->nv2 != -1.)
2100	{
2101	tv[0].tv_sec = req->nv1;
2102	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
2103	tv[1].tv_sec = req->nv2;
2104	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
2105
2106	times = tv;
2107	}
2108	else
2109	times = 0;
2110
2111	req->result = req->type == EIO_FUTIME
2112	? futimes (req->int1, times)
2113	: utimes (req->ptr1, times);
2114	}
2115	break;
2116
2117	case EIO_GROUP:	1991	case EIO_GROUP:
2118	abort (); /* handled in eio_request */	1992	abort (); /* handled in eio_request */
		1993	#endif
2119		1994
2120	case EIO_NOP:	1995	case EIO_NOP:
2121	req->result = 0;	1996	req->result = 0;
2122	break;	1997	break;
2123		1998
2124	case EIO_CUSTOM:	1999	case EIO_CUSTOM:
2125	req->feed (req);	2000	req->feed (req);
2126	break;	2001	break;
2127		2002
2128	default:	2003	default:
2129	errno = ENOSYS;
2130	req->result = -1;	2004	req->result = EIO_ENOSYS ();
2131	break;	2005	break;
2132	}	2006	}
2133		2007
2134	req->errorno = errno;	2008	req->errorno = errno;
2135	}	2009	}
2136		2010
2137	#ifndef EIO_NO_WRAPPERS	2011	#ifndef EIO_NO_WRAPPERS
2138		2012
		2013	eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data)
		2014	{
		2015	REQ (EIO_WD_OPEN); PATH; SEND;
		2016	}
		2017
		2018	eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data)
		2019	{
		2020	REQ (EIO_WD_CLOSE); req->wd = wd; SEND;
		2021	}
		2022
2139	eio_req *eio_nop (int pri, eio_cb cb, void *data)	2023	eio_req *eio_nop (int pri, eio_cb cb, void *data)
2140	{	2024	{
2141	REQ (EIO_NOP); SEND;	2025	REQ (EIO_NOP); SEND;
2142	}	2026	}
2143		2027
…		…
2159	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)	2043	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
2160	{	2044	{
2161	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;	2045	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
2162	}	2046	}
2163		2047
		2048	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
		2049	{
		2050	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
		2051	}
		2052
		2053	eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data)
		2054	{
		2055	REQ (EIO_SYNCFS); req->int1 = fd; SEND;
		2056	}
		2057
		2058	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		2059	{
		2060	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		2061	}
		2062
2164	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)	2063	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
2165	{	2064	{
2166	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;	2065	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
2167	}	2066	}
2168		2067
…		…
2174	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)	2073	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
2175	{	2074	{
2176	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;	2075	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
2177	}	2076	}
2178		2077
2179	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	{
2181	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
2182	}
2183
2184	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)	2078	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
2185	{	2079	{
2186	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;	2080	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
2187	}	2081	}
2188		2082
2189	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
2190	{
2191	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
2192	}
2193
2194	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)	2083	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
2195	{	2084	{
2196	REQ (EIO_CLOSE); req->int1 = fd; SEND;	2085	REQ (EIO_CLOSE); req->int1 = fd; SEND;
2197	}	2086	}
2198		2087
2199	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)	2088	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
2200	{	2089	{
2201	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;	2090	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
2202	}	2091	}
2203		2092
		2093	eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data)
		2094	{
		2095	REQ (EIO_SEEK); req->int1 = fd; req->offs = offset; req->int2 = whence; SEND;
		2096	}
		2097
2204	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)	2098	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
2205	{	2099	{
2206	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;	2100	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
2207	}	2101	}
2208		2102
2209	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)	2103	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
2210	{	2104	{
2211	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;	2105	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		2106	}
		2107
		2108	eio_req *eio_fcntl (int fd, int cmd, void *arg, int pri, eio_cb cb, void *data)
		2109	{
		2110	REQ (EIO_IOCTL); req->int1 = fd; req->int2 = cmd; req->ptr2 = arg; SEND;
		2111	}
		2112
		2113	eio_req *eio_ioctl (int fd, unsigned long request, void *buf, int pri, eio_cb cb, void *data)
		2114	{
		2115	REQ (EIO_IOCTL); req->int1 = fd; req->int2 = request; req->ptr2 = buf; SEND;
2212	}	2116	}
2213		2117
2214	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)	2118	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
2215	{	2119	{
2216	REQ (EIO_FSTAT); req->int1 = fd; SEND;	2120	REQ (EIO_FSTAT); req->int1 = fd; SEND;
…		…
2404	void	2308	void
2405	eio_grp_add (eio_req *grp, eio_req *req)	2309	eio_grp_add (eio_req *grp, eio_req *req)
2406	{	2310	{
2407	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2311	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
2408		2312
2409	grp->flags |= EIO_FLAG_GROUPADD;	2313	grp->flags |= ETP_FLAG_GROUPADD;
2410		2314
2411	++grp->size;	2315	++grp->size;
2412	req->grp = grp;	2316	req->grp = grp;
2413		2317
2414	req->grp_prev = 0;	2318	req->grp_prev = 0;

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