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Comparing libeio/eio.c (file contents):
Revision 1.106 by root, Mon Sep 26 20:19:08 2011 UTC vs.
Revision 1.150 by root, Fri Jun 15 02:57:36 2018 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) 2007,2008,2009,2010,2011,2012,2013,2016,2017 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 X_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>
…		…
58	#include <sys/stat.h>	53	#include <sys/stat.h>
59	#include <limits.h>	54	#include <limits.h>
60	#include <fcntl.h>	55	#include <fcntl.h>
61	#include <assert.h>	56	#include <assert.h>
62		57
63	#if _POSIX_VERSION >= 200809L
64	# define HAVE_AT 1
65	#else
66	# define HAVE_AT 0
67	#endif
68
69	/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */	58	/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */
70	/* intptr_t only comes from stdint.h, says idiot openbsd coder */	59	/* intptr_t only comes from stdint.h, says idiot openbsd coder */
71	#if HAVE_STDINT_H	60	#if HAVE_STDINT_H
72	# include <stdint.h>	61	# include <stdint.h>
73	#endif	62	#endif
…		…
126	#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))
127		116
128	#define chmod(path,mode) _chmod (path, mode)	117	#define chmod(path,mode) _chmod (path, mode)
129	#define dup(fd) _dup (fd)	118	#define dup(fd) _dup (fd)
130	#define dup2(fd1,fd2) _dup2 (fd1, fd2)	119	#define dup2(fd1,fd2) _dup2 (fd1, fd2)
		120	#define pipe(fds) _pipe (fds, 4096, O_BINARY)
131		121
		122	#define fcntl(fd,cmd,arg) EIO_ENOSYS ()
		123	#define ioctl(fd,cmd,arg) EIO_ENOSYS ()
132	#define fchmod(fd,mode) EIO_ENOSYS ()	124	#define fchmod(fd,mode) EIO_ENOSYS ()
133	#define chown(path,uid,gid) EIO_ENOSYS ()	125	#define chown(path,uid,gid) EIO_ENOSYS ()
134	#define fchown(fd,uid,gid) EIO_ENOSYS ()	126	#define fchown(fd,uid,gid) EIO_ENOSYS ()
135	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */	127	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
136	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */	128	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
137	#define mknod(path,mode,dev) EIO_ENOSYS ()	129	#define mknod(path,mode,dev) EIO_ENOSYS ()
138	#define sync() EIO_ENOSYS ()	130	#define sync() EIO_ENOSYS ()
139	#define readlink(path,buf,s) EIO_ENOSYS ()	131	#define readlink(path,buf,s) EIO_ENOSYS ()
140	#define statvfs(path,buf) EIO_ENOSYS ()	132	#define statvfs(path,buf) EIO_ENOSYS ()
141	#define fstatvfs(fd,buf) EIO_ENOSYS ()	133	#define fstatvfs(fd,buf) EIO_ENOSYS ()
		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	}
142		169
143	/* rename() uses MoveFile, which fails to overwrite */	170	/* rename() uses MoveFile, which fails to overwrite */
144	#define rename(old,neu) eio__rename (old, neu)	171	#define rename(old,neu) eio__rename (old, neu)
145		172
146	static int	173	static int
…		…
174	/* we could even stat and see if it exists */	201	/* we could even stat and see if it exists */
175	static int	202	static int
176	symlink (const char *old, const char *neu)	203	symlink (const char *old, const char *neu)
177	{	204	{
178	#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)
179	if (CreateSymbolicLink (neu, old, 1))	213	if (CreateSymbolicLink (neu, old, flags))
180	return 0;	214	return 0;
181
182	if (CreateSymbolicLink (neu, old, 0))
183	return 0;
184	#endif	215	#endif
185		216
186	return EIO_ERRNO (ENOENT, -1);	217	return EIO_ERRNO (ENOENT, -1);
187	}	218	}
188		219
189	/* POSIX API only */	220	/* POSIX API only, causing trouble for win32 apps */
190	#define CreateHardLink(neu,old,flags) 0	221	#define CreateHardLink(neu,old,flags) 0 /* not really creating hardlink, still using relative paths? */
191	#define CreateSymbolicLink(neu,old,flags) 0	222	#define CreateSymbolicLink(neu,old,flags) 0 /* vista+ only */
192		223
193	struct statvfs	224	struct statvfs
194	{	225	{
195	int dummy;	226	int dummy;
196	};	227	};
…		…
200	#define D_NAME(entp) entp.cFileName	231	#define D_NAME(entp) entp.cFileName
201	#define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG)	232	#define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG)
202		233
203	#else	234	#else
204		235
		236	#include <sys/ioctl.h>
205	#include <sys/time.h>	237	#include <sys/time.h>
206	#include <sys/select.h>	238	#include <sys/select.h>
207	#include <sys/statvfs.h>
208	#include <unistd.h>	239	#include <unistd.h>
209	#include <signal.h>	240	#include <signal.h>
210	#include <dirent.h>	241	#include <dirent.h>
211		242
		243	#ifdef ANDROID
		244	#include <sys/vfs.h>
		245	#define statvfs statfs
		246	#define fstatvfs fstatfs
		247	#include <asm/page.h> /* supposedly limits.h does #define PAGESIZE PAGESIZE */
		248	#else
		249	#include <sys/statvfs.h>
		250	#endif
		251
212	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES	252	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
213	#include <sys/mman.h>	253	#include <sys/mman.h>
214	#endif	254	#endif
215		255
216	#define D_NAME(entp) entp->d_name	256	#define D_NAME(entp) entp->d_name
217		257
218	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */	258	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
219	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__	259	#if __FreeBSD__ || __NetBSD__ || __OpenBSD__
220	#define _DIRENT_HAVE_D_TYPE /* sigh */	260	#define _DIRENT_HAVE_D_TYPE /* sigh */
221	#define D_INO(de) (de)->d_fileno	261	#define D_INO(de) (de)->d_fileno
222	#define D_NAMLEN(de) (de)->d_namlen	262	#define D_NAMLEN(de) (de)->d_namlen
223	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600	263	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
224	#define D_INO(de) (de)->d_ino	264	#define D_INO(de) (de)->d_ino
…		…
243	# include <utime.h>	283	# include <utime.h>
244	#endif	284	#endif
245		285
246	#if HAVE_SYS_SYSCALL_H	286	#if HAVE_SYS_SYSCALL_H
247	# include <sys/syscall.h>	287	# include <sys/syscall.h>
248	#endif
249
250	#if HAVE_SYS_PRCTL_H
251	# include <sys/prctl.h>
252	#endif	288	#endif
253		289
254	#if HAVE_SENDFILE	290	#if HAVE_SENDFILE
255	# if __linux	291	# if __linux
256	# include <sys/sendfile.h>	292	# include <sys/sendfile.h>
…		…
264	# else	300	# else
265	# error sendfile support requested but not available	301	# error sendfile support requested but not available
266	# endif	302	# endif
267	#endif	303	#endif
268		304
		305	#if HAVE_RENAMEAT2
		306	# include <sys/syscall.h>
		307	# include <linux/fs.h>
		308	#endif
		309
269	#ifndef D_TYPE	310	#ifndef D_TYPE
270	# define D_TYPE(de) 0	311	# define D_TYPE(de) 0
271	#endif	312	#endif
272	#ifndef D_INO	313	#ifndef D_INO
273	# define D_INO(de) 0	314	# define D_INO(de) 0
…		…
281	# define NAME_MAX 4096	322	# define NAME_MAX 4096
282	#endif	323	#endif
283		324
284	/* used for readlink etc. */	325	/* used for readlink etc. */
285	#ifndef PATH_MAX	326	#ifndef PATH_MAX
286	# define PATH_MAX 4096	327	# define PATH_MAX 0
287	#endif	328	#endif
		329
		330	#ifndef O_CLOEXEC
		331	#define O_CLOEXEC 0
		332	#endif
		333
		334	#ifndef EIO_PATH_MIN
		335	# define EIO_PATH_MIN 8160
		336	#endif
		337
		338	#define EIO_PATH_MAX (PATH_MAX <= EIO_PATH_MIN ? EIO_PATH_MIN : PATH_MAX)
288		339
289	/* buffer size for various temporary buffers */	340	/* buffer size for various temporary buffers */
290	#define EIO_BUFSIZE 65536	341	#define EIO_BUFSIZE 65536
291		342
292	#define dBUF \	343	#define dBUF \
293	char *eio_buf = malloc (EIO_BUFSIZE); \	344	char *eio_buf = malloc (EIO_BUFSIZE); \
294	errno = ENOMEM; \	345	errno = ENOMEM; \
295	if (!eio_buf) \	346	if (!eio_buf) \
296	return -1	347	return -1
297		348
298	#define FUBd \	349	#define FUBd \
299	free (eio_buf)	350	free (eio_buf)
300		351
301	#define EIO_TICKS ((1000000 + 1023) >> 10)
302
303	/*****************************************************************************/	352	/*****************************************************************************/
304		353
305	struct tmpbuf	354	struct etp_tmpbuf;
		355
		356	#if _POSIX_VERSION >= 200809L
		357	#define HAVE_AT 1
		358	#define WD2FD(wd) ((wd) ? (wd)->fd : AT_FDCWD)
		359	#ifndef O_SEARCH
		360	#define O_SEARCH O_RDONLY
		361	#endif
		362	#else
		363	#define HAVE_AT 0
		364	static const char *wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path);
		365	#endif
		366
		367	struct eio_pwd
306	{	368	{
307	void *ptr;	369	#if HAVE_AT
		370	int fd;
		371	#endif
308	int len;	372	int len;
		373	char str[1]; /* actually, a 0-terminated canonical path */
309	};	374	};
310
311	static void *
312	tmpbuf_get (struct tmpbuf *buf, int len)
313	{
314	if (buf->len < len)
315	{
316	free (buf->ptr);
317	buf->ptr = malloc (buf->len = len);
318	}
319
320	return buf->ptr;
321	}
322		375
323	/*****************************************************************************/	376	/*****************************************************************************/
324		377
325	#define ETP_PRI_MIN EIO_PRI_MIN	378	#define ETP_PRI_MIN EIO_PRI_MIN
326	#define ETP_PRI_MAX EIO_PRI_MAX	379	#define ETP_PRI_MAX EIO_PRI_MAX
327		380
		381	#define ETP_TYPE_QUIT -1
		382	#define ETP_TYPE_GROUP EIO_GROUP
		383
		384	static void eio_nop_callback (void) { }
		385	static void (*eio_want_poll_cb)(void) = eio_nop_callback;
		386	static void (*eio_done_poll_cb)(void) = eio_nop_callback;
		387
		388	#define ETP_WANT_POLL(pool) eio_want_poll_cb ()
		389	#define ETP_DONE_POLL(pool) eio_done_poll_cb ()
		390
328	struct etp_worker;	391	struct etp_worker;
329
330	#define ETP_REQ eio_req	392	#define ETP_REQ eio_req
331	#define ETP_DESTROY(req) eio_destroy (req)	393	#define ETP_DESTROY(req) eio_destroy (req)
332	static int eio_finish (eio_req *req);	394	static int eio_finish (eio_req *req);
333	#define ETP_FINISH(req) eio_finish (req)	395	#define ETP_FINISH(req) eio_finish (req)
334	static void eio_execute (struct etp_worker *self, eio_req *req);	396	static void eio_execute (struct etp_worker *self, eio_req *req);
335	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)	397	#define ETP_EXECUTE(wrk,req) eio_execute (wrk, req)
336		398
337	/*****************************************************************************/	399	#include "etp.c"
338		400
339	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)	401	static struct etp_pool eio_pool;
340		402	#define EIO_POOL (&eio_pool)
341	/* calculate time difference in ~1/EIO_TICKS of a second */
342	ecb_inline int
343	tvdiff (struct timeval *tv1, struct timeval *tv2)
344	{
345	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
346	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
347	}
348
349	static unsigned int started, idle, wanted = 4;
350
351	static void (*want_poll_cb) (void);
352	static void (*done_poll_cb) (void);
353
354	static unsigned int max_poll_time; /* reslock */
355	static unsigned int max_poll_reqs; /* reslock */
356
357	static unsigned int nreqs; /* reqlock */
358	static unsigned int nready; /* reqlock */
359	static unsigned int npending; /* reqlock */
360	static unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
361	static unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
362
363	static xmutex_t wrklock;
364	static xmutex_t reslock;
365	static xmutex_t reqlock;
366	static xcond_t reqwait;
367
368	#if !HAVE_PREADWRITE
369	/*
370	* make our pread/pwrite emulation safe against themselves, but not against
371	* normal read/write by using a mutex. slows down execution a lot,
372	* but that's your problem, not mine.
373	*/
374	static xmutex_t preadwritelock;
375	#endif
376
377	typedef struct etp_worker
378	{
379	struct tmpbuf tmpbuf;
380
381	/* locked by wrklock */
382	struct etp_worker *prev, *next;
383
384	xthread_t tid;
385
386	#ifdef ETP_WORKER_COMMON
387	ETP_WORKER_COMMON
388	#endif
389	} etp_worker;
390
391	static etp_worker wrk_first; /* NOT etp */
392
393	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
394	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
395
396	/* worker threads management */
397
398	static void ecb_cold
399	etp_worker_clear (etp_worker *wrk)
400	{
401	}
402
403	static void ecb_cold
404	etp_worker_free (etp_worker *wrk)
405	{
406	free (wrk->tmpbuf.ptr);
407
408	wrk->next->prev = wrk->prev;
409	wrk->prev->next = wrk->next;
410
411	free (wrk);
412	}
413
414	static unsigned int
415	etp_nreqs (void)
416	{
417	int retval;
418	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
419	retval = nreqs;
420	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
421	return retval;
422	}
423
424	static unsigned int
425	etp_nready (void)
426	{
427	unsigned int retval;
428
429	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
430	retval = nready;
431	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
432
433	return retval;
434	}
435
436	static unsigned int
437	etp_npending (void)
438	{
439	unsigned int retval;
440
441	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
442	retval = npending;
443	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
444
445	return retval;
446	}
447
448	static unsigned int
449	etp_nthreads (void)
450	{
451	unsigned int retval;
452
453	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
454	retval = started;
455	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
456
457	return retval;
458	}
459
460	/*
461	* a somewhat faster data structure might be nice, but
462	* with 8 priorities this actually needs <20 insns
463	* per shift, the most expensive operation.
464	*/
465	typedef struct {
466	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
467	int size;
468	} etp_reqq;
469
470	static etp_reqq req_queue;
471	static etp_reqq res_queue;
472
473	static void ecb_noinline ecb_cold
474	reqq_init (etp_reqq *q)
475	{
476	int pri;
477
478	for (pri = 0; pri < ETP_NUM_PRI; ++pri)
479	q->qs[pri] = q->qe[pri] = 0;
480
481	q->size = 0;
482	}
483
484	static int ecb_noinline
485	reqq_push (etp_reqq *q, ETP_REQ *req)
486	{
487	int pri = req->pri;
488	req->next = 0;
489
490	if (q->qe[pri])
491	{
492	q->qe[pri]->next = req;
493	q->qe[pri] = req;
494	}
495	else
496	q->qe[pri] = q->qs[pri] = req;
497
498	return q->size++;
499	}
500
501	static ETP_REQ * ecb_noinline
502	reqq_shift (etp_reqq *q)
503	{
504	int pri;
505
506	if (!q->size)
507	return 0;
508
509	--q->size;
510
511	for (pri = ETP_NUM_PRI; pri--; )
512	{
513	eio_req *req = q->qs[pri];
514
515	if (req)
516	{
517	if (!(q->qs[pri] = (eio_req *)req->next))
518	q->qe[pri] = 0;
519
520	return req;
521	}
522	}
523
524	abort ();
525	}
526
527	static int ecb_cold
528	etp_init (void (*want_poll)(void), void (*done_poll)(void))
529	{
530	X_MUTEX_CREATE (wrklock);
531	X_MUTEX_CREATE (reslock);
532	X_MUTEX_CREATE (reqlock);
533	X_COND_CREATE (reqwait);
534
535	reqq_init (&req_queue);
536	reqq_init (&res_queue);
537
538	wrk_first.next =
539	wrk_first.prev = &wrk_first;
540
541	started = 0;
542	idle = 0;
543	nreqs = 0;
544	nready = 0;
545	npending = 0;
546
547	want_poll_cb = want_poll;
548	done_poll_cb = done_poll;
549
550	return 0;
551	}
552
553	X_THREAD_PROC (etp_proc);
554
555	static void ecb_cold
556	etp_start_thread (void)
557	{
558	etp_worker *wrk = calloc (1, sizeof (etp_worker));
559
560	/*TODO*/
561	assert (("unable to allocate worker thread data", wrk));
562
563	X_LOCK (wrklock);
564
565	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
566	{
567	wrk->prev = &wrk_first;
568	wrk->next = wrk_first.next;
569	wrk_first.next->prev = wrk;
570	wrk_first.next = wrk;
571	++started;
572	}
573	else
574	free (wrk);
575
576	X_UNLOCK (wrklock);
577	}
578
579	static void
580	etp_maybe_start_thread (void)
581	{
582	if (ecb_expect_true (etp_nthreads () >= wanted))
583	return;
584
585	/* todo: maybe use idle here, but might be less exact */
586	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
587	return;
588
589	etp_start_thread ();
590	}
591
592	static void ecb_cold
593	etp_end_thread (void)
594	{
595	eio_req *req = calloc (1, sizeof (eio_req)); /* will be freed by worker */
596
597	req->type = -1;
598	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
599
600	X_LOCK (reqlock);
601	reqq_push (&req_queue, req);
602	X_COND_SIGNAL (reqwait);
603	X_UNLOCK (reqlock);
604
605	X_LOCK (wrklock);
606	--started;
607	X_UNLOCK (wrklock);
608	}
609
610	static int
611	etp_poll (void)
612	{
613	unsigned int maxreqs;
614	unsigned int maxtime;
615	struct timeval tv_start, tv_now;
616
617	X_LOCK (reslock);
618	maxreqs = max_poll_reqs;
619	maxtime = max_poll_time;
620	X_UNLOCK (reslock);
621
622	if (maxtime)
623	gettimeofday (&tv_start, 0);
624
625	for (;;)
626	{
627	ETP_REQ *req;
628
629	etp_maybe_start_thread ();
630
631	X_LOCK (reslock);
632	req = reqq_shift (&res_queue);
633
634	if (req)
635	{
636	--npending;
637
638	if (!res_queue.size && done_poll_cb)
639	done_poll_cb ();
640	}
641
642	X_UNLOCK (reslock);
643
644	if (!req)
645	return 0;
646
647	X_LOCK (reqlock);
648	--nreqs;
649	X_UNLOCK (reqlock);
650
651	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
652	{
653	req->int1 = 1; /* mark request as delayed */
654	continue;
655	}
656	else
657	{
658	int res = ETP_FINISH (req);
659	if (ecb_expect_false (res))
660	return res;
661	}
662
663	if (ecb_expect_false (maxreqs && !--maxreqs))
664	break;
665
666	if (maxtime)
667	{
668	gettimeofday (&tv_now, 0);
669
670	if (tvdiff (&tv_start, &tv_now) >= maxtime)
671	break;
672	}
673	}
674
675	errno = EAGAIN;
676	return -1;
677	}
678
679	static void
680	etp_cancel (ETP_REQ *req)
681	{
682	req->cancelled = 1;
683
684	eio_grp_cancel (req);
685	}
686
687	static void
688	etp_submit (ETP_REQ *req)
689	{
690	req->pri -= ETP_PRI_MIN;
691
692	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
693	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
694
695	if (ecb_expect_false (req->type == EIO_GROUP))
696	{
697	/* I hope this is worth it :/ */
698	X_LOCK (reqlock);
699	++nreqs;
700	X_UNLOCK (reqlock);
701
702	X_LOCK (reslock);
703
704	++npending;
705
706	if (!reqq_push (&res_queue, req) && want_poll_cb)
707	want_poll_cb ();
708
709	X_UNLOCK (reslock);
710	}
711	else
712	{
713	X_LOCK (reqlock);
714	++nreqs;
715	++nready;
716	reqq_push (&req_queue, req);
717	X_COND_SIGNAL (reqwait);
718	X_UNLOCK (reqlock);
719
720	etp_maybe_start_thread ();
721	}
722	}
723
724	static void ecb_cold
725	etp_set_max_poll_time (double nseconds)
726	{
727	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
728	max_poll_time = nseconds * EIO_TICKS;
729	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
730	}
731
732	static void ecb_cold
733	etp_set_max_poll_reqs (unsigned int maxreqs)
734	{
735	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
736	max_poll_reqs = maxreqs;
737	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
738	}
739
740	static void ecb_cold
741	etp_set_max_idle (unsigned int nthreads)
742	{
743	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
744	max_idle = nthreads;
745	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
746	}
747
748	static void ecb_cold
749	etp_set_idle_timeout (unsigned int seconds)
750	{
751	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
752	idle_timeout = seconds;
753	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
754	}
755
756	static void ecb_cold
757	etp_set_min_parallel (unsigned int nthreads)
758	{
759	if (wanted < nthreads)
760	wanted = nthreads;
761	}
762
763	static void ecb_cold
764	etp_set_max_parallel (unsigned int nthreads)
765	{
766	if (wanted > nthreads)
767	wanted = nthreads;
768
769	while (started > wanted)
770	etp_end_thread ();
771	}
772		403
773	/*****************************************************************************/	404	/*****************************************************************************/
774		405
775	static void	406	static void
776	grp_try_feed (eio_req *grp)	407	grp_try_feed (eio_req *grp)
777	{	408	{
778	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	409	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
779	{	410	{
780	grp->flags &= ~EIO_FLAG_GROUPADD;	411	grp->flags &= ~ETP_FLAG_GROUPADD;
781		412
782	EIO_FEED (grp);	413	EIO_FEED (grp);
783		414
784	/* stop if no progress has been made */	415	/* stop if no progress has been made */
785	if (!(grp->flags & EIO_FLAG_GROUPADD))	416	if (!(grp->flags & ETP_FLAG_GROUPADD))
786	{	417	{
787	grp->feed = 0;	418	grp->feed = 0;
788	break;	419	break;
789	}	420	}
790	}	421	}
…		…
797		428
798	/* call feeder, if applicable */	429	/* call feeder, if applicable */
799	grp_try_feed (grp);	430	grp_try_feed (grp);
800		431
801	/* finish, if done */	432	/* finish, if done */
802	if (!grp->size && grp->int1)	433	if (!grp->size && grp->flags & ETP_FLAG_DELAYED)
803	return eio_finish (grp);	434	return eio_finish (grp);
804	else	435	else
805	return 0;	436	return 0;
806	}	437	}
807		438
…		…
843	}	474	}
844		475
845	void	476	void
846	eio_grp_cancel (eio_req *grp)	477	eio_grp_cancel (eio_req *grp)
847	{	478	{
848	for (grp = grp->grp_first; grp; grp = grp->grp_next)	479	etp_grp_cancel (EIO_POOL, grp);
849	eio_cancel (grp);
850	}	480	}
851		481
852	void	482	void
853	eio_cancel (eio_req *req)	483	eio_cancel (eio_req *req)
854	{	484	{
855	etp_cancel (req);	485	etp_cancel (EIO_POOL, req);
856	}	486	}
857		487
858	void	488	void
859	eio_submit (eio_req *req)	489	eio_submit (eio_req *req)
860	{	490	{
861	etp_submit (req);	491	etp_submit (EIO_POOL, req);
862	}	492	}
863		493
864	unsigned int	494	unsigned int
865	eio_nreqs (void)	495	eio_nreqs (void)
866	{	496	{
867	return etp_nreqs ();	497	return etp_nreqs (EIO_POOL);
868	}	498	}
869		499
870	unsigned int	500	unsigned int
871	eio_nready (void)	501	eio_nready (void)
872	{	502	{
873	return etp_nready ();	503	return etp_nready (EIO_POOL);
874	}	504	}
875		505
876	unsigned int	506	unsigned int
877	eio_npending (void)	507	eio_npending (void)
878	{	508	{
879	return etp_npending ();	509	return etp_npending (EIO_POOL);
880	}	510	}
881		511
882	unsigned int ecb_cold	512	unsigned int ecb_cold
883	eio_nthreads (void)	513	eio_nthreads (void)
884	{	514	{
885	return etp_nthreads ();	515	return etp_nthreads (EIO_POOL);
886	}	516	}
887		517
888	void ecb_cold	518	void ecb_cold
889	eio_set_max_poll_time (double nseconds)	519	eio_set_max_poll_time (double nseconds)
890	{	520	{
891	etp_set_max_poll_time (nseconds);	521	etp_set_max_poll_time (EIO_POOL, nseconds);
892	}	522	}
893		523
894	void ecb_cold	524	void ecb_cold
895	eio_set_max_poll_reqs (unsigned int maxreqs)	525	eio_set_max_poll_reqs (unsigned int maxreqs)
896	{	526	{
897	etp_set_max_poll_reqs (maxreqs);	527	etp_set_max_poll_reqs (EIO_POOL, maxreqs);
898	}	528	}
899		529
900	void ecb_cold	530	void ecb_cold
901	eio_set_max_idle (unsigned int nthreads)	531	eio_set_max_idle (unsigned int nthreads)
902	{	532	{
903	etp_set_max_idle (nthreads);	533	etp_set_max_idle (EIO_POOL, nthreads);
904	}	534	}
905		535
906	void ecb_cold	536	void ecb_cold
907	eio_set_idle_timeout (unsigned int seconds)	537	eio_set_idle_timeout (unsigned int seconds)
908	{	538	{
909	etp_set_idle_timeout (seconds);	539	etp_set_idle_timeout (EIO_POOL, seconds);
910	}	540	}
911		541
912	void ecb_cold	542	void ecb_cold
913	eio_set_min_parallel (unsigned int nthreads)	543	eio_set_min_parallel (unsigned int nthreads)
914	{	544	{
915	etp_set_min_parallel (nthreads);	545	etp_set_min_parallel (EIO_POOL, nthreads);
916	}	546	}
917		547
918	void ecb_cold	548	void ecb_cold
919	eio_set_max_parallel (unsigned int nthreads)	549	eio_set_max_parallel (unsigned int nthreads)
920	{	550	{
921	etp_set_max_parallel (nthreads);	551	etp_set_max_parallel (EIO_POOL, nthreads);
922	}	552	}
923		553
924	int eio_poll (void)	554	int eio_poll (void)
925	{	555	{
926	return etp_poll ();	556	return etp_poll (EIO_POOL);
927	}	557	}
928		558
929	/*****************************************************************************/	559	/*****************************************************************************/
930	/* work around various missing functions */	560	/* work around various missing functions */
931		561
932	#if !HAVE_PREADWRITE	562	#if HAVE_POSIX_CLOSE && !__linux
933	# undef pread	563	# define eio__close(fd) posix_close (fd, 0)
934	# undef pwrite	564	#else
935	# define pread eio__pread	565	# define eio__close(fd) close (fd)
936	# define pwrite eio__pwrite
937
938	static eio_ssize_t
939	eio__pread (int fd, void *buf, size_t count, off_t offset)
940	{
941	eio_ssize_t res;
942	off_t ooffset;
943
944	X_LOCK (preadwritelock);
945	ooffset = lseek (fd, 0, SEEK_CUR);
946	lseek (fd, offset, SEEK_SET);
947	res = read (fd, buf, count);
948	lseek (fd, ooffset, SEEK_SET);
949	X_UNLOCK (preadwritelock);
950
951	return res;
952	}
953
954	static eio_ssize_t
955	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
956	{
957	eio_ssize_t res;
958	off_t ooffset;
959
960	X_LOCK (preadwritelock);
961	ooffset = lseek (fd, 0, SEEK_CUR);
962	lseek (fd, offset, SEEK_SET);
963	res = write (fd, buf, count);
964	lseek (fd, ooffset, SEEK_SET);
965	X_UNLOCK (preadwritelock);
966
967	return res;
968	}
969	#endif	566	#endif
		567
		568	/* close() without disturbing errno */
		569	static void
		570	silent_close (int fd)
		571	{
		572	int saved_errno = errno;
		573	eio__close (fd);
		574	errno = saved_errno;
		575	}
970		576
971	#ifndef HAVE_UTIMES	577	#ifndef HAVE_UTIMES
972		578
973	# undef utimes	579	# undef utimes
974	# define utimes(path,times) eio__utimes (path, times)	580	# define utimes(path,times) eio__utimes (path, times)
…		…
1016	int res;	622	int res;
1017		623
1018	#if HAVE_SYS_SYNCFS	624	#if HAVE_SYS_SYNCFS
1019	res = (int)syscall (__NR_syncfs, (int)(fd));	625	res = (int)syscall (__NR_syncfs, (int)(fd));
1020	#else	626	#else
1021	res = -1;	627	res = EIO_ENOSYS ();
1022	errno = ENOSYS;
1023	#endif	628	#endif
1024		629
1025	if (res < 0 && errno == ENOSYS && fd >= 0)	630	if (res < 0 && errno == ENOSYS && fd >= 0)
1026	sync ();	631	sync ();
1027		632
…		…
1057	}	662	}
1058		663
1059	static int	664	static int
1060	eio__fallocate (int fd, int mode, off_t offset, size_t len)	665	eio__fallocate (int fd, int mode, off_t offset, size_t len)
1061	{	666	{
1062	#if HAVE_FALLOCATE	667	#if HAVE_LINUX_FALLOCATE
1063	return fallocate (fd, mode, offset, len);	668	return fallocate (fd, mode, offset, len);
1064	#else	669	#else
1065	errno = ENOSYS;	670	return EIO_ENOSYS ();
1066	return -1;
1067	#endif	671	#endif
1068	}	672	}
1069		673
1070	#if !HAVE_READAHEAD	674	#if !HAVE_READAHEAD
1071	# undef readahead	675	# undef readahead
…		…
1086	todo -= len;	690	todo -= len;
1087	}	691	}
1088		692
1089	FUBd;	693	FUBd;
1090		694
1091	errno = 0;	695	/* linux's readahead basically only fails for EBADF or EINVAL (not mmappable) */
		696	/* but not for e.g. EIO or eof, so we also never fail */
1092	return count;	697	return 0;
1093	}	698	}
1094		699
1095	#endif	700	#endif
1096		701
1097	/* sendfile always needs emulation */	702	/* sendfile always needs emulation */
…		…
1132		737
1133	/* according to source inspection, this is correct, and useful behaviour */	738	/* according to source inspection, this is correct, and useful behaviour */
1134	if (sbytes)	739	if (sbytes)
1135	res = sbytes;	740	res = sbytes;
1136		741
1137	# elif defined (__APPLE__)	742	# elif defined __APPLE__
1138	off_t sbytes = count;	743	off_t sbytes = count;
1139	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);	744	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
1140		745
1141	/* according to the manpage, sbytes is always valid */	746	/* according to the manpage, sbytes is always valid */
1142	if (sbytes)	747	if (sbytes)
…		…
1169	HANDLE h = TO_SOCKET (ifd);	774	HANDLE h = TO_SOCKET (ifd);
1170	SetFilePointer (h, offset, 0, FILE_BEGIN);	775	SetFilePointer (h, offset, 0, FILE_BEGIN);
1171	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);	776	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
1172		777
1173	#else	778	#else
1174	res = -1;	779	res = EIO_ENOSYS ();
1175	errno = ENOSYS;
1176	#endif	780	#endif
1177		781
1178	/* we assume sendfile can copy at least 128mb in one go */	782	/* we assume sendfile can copy at least 128mb in one go */
1179	if (res <= 128 * 1024 * 1024)	783	if (res <= 128 * 1024 * 1024)
1180	{	784	{
…		…
1355	intptr_t end = addr + len;	959	intptr_t end = addr + len;
1356	intptr_t page = eio_pagesize ();	960	intptr_t page = eio_pagesize ();
1357		961
1358	if (addr < end)	962	if (addr < end)
1359	if (flags & EIO_MT_MODIFY) /* modify */	963	if (flags & EIO_MT_MODIFY) /* modify */
1360	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));	964	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < end && !EIO_CANCELLED (req));
1361	else	965	else
1362	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));	966	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < end && !EIO_CANCELLED (req));
1363	}	967	}
1364		968
1365	return 0;	969	return 0;
1366	}	970	}
1367		971
1368	/*****************************************************************************/	972	/*****************************************************************************/
1369	/* requests implemented outside eio_execute, because they are so large */	973	/* requests implemented outside eio_execute, because they are so large */
1370		974
1371	/* copies some absolute path to tmpbuf */	975	static void
1372	static char *	976	eio__lseek (eio_req *req)
1373	eio__getwd (struct tmpbuf *tmpbuf, eio_wd wd)
1374	{	977	{
1375	if (wd == EIO_CWD)	978	/* this usually gets optimised away completely, or your compiler sucks, */
1376	return getcwd (tmpbuf->ptr, PATH_MAX);	979	/* or the whence constants really are not 0, 1, 2 */
		980	int whence = req->int2 == EIO_SEEK_SET ? SEEK_SET
		981	: req->int2 == EIO_SEEK_CUR ? SEEK_CUR
		982	: req->int2 == EIO_SEEK_END ? SEEK_END
		983	: req->int2;
1377		984
1378	#if HAVE_AT	985	req->offs = lseek (req->int1, req->offs, whence);
1379	abort (); /*TODO*/	986	req->result = req->offs == (off_t)-1 ? -1 : 0;
1380	#else
1381	strcpy (tmpbuf->ptr, wd);
1382	#endif
1383	return tmpbuf->ptr;
1384	}	987	}
1385		988
1386	/* result will always end up in tmpbuf, there is always space for adding a 0-byte */	989	/* result will always end up in tmpbuf, there is always space for adding a 0-byte */
1387	static int	990	static int
1388	eio__realpath (struct tmpbuf *tmpbuf, eio_wd wd, const char *path)	991	eio__realpath (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
1389	{	992	{
		993	char *res;
1390	const char *rel = path;	994	const char *rel = path;
1391	char *res;
1392	char *tmp1, *tmp2;	995	char *tmp1, *tmp2;
1393	#if SYMLOOP_MAX > 32	996	#if SYMLOOP_MAX > 32
1394	int symlinks = SYMLOOP_MAX;	997	int symlinks = SYMLOOP_MAX;
1395	#else	998	#else
1396	int symlinks = 32;	999	int symlinks = 32;
1397	#endif	1000	#endif
1398		1001
1399	/*D*/ /*TODO: wd ignored */
1400
1401	errno = EINVAL;	1002	errno = EINVAL;
1402	if (!rel)	1003	if (!rel)
1403	return -1;	1004	return -1;
1404		1005
1405	errno = ENOENT;	1006	errno = ENOENT;
1406	if (!*rel)	1007	if (!*rel)
1407	return -1;	1008	return -1;
1408		1009
1409	res = tmpbuf_get (tmpbuf, PATH_MAX * 3);	1010	res = etp_tmpbuf_get (tmpbuf, EIO_PATH_MAX * 3);
		1011	#ifdef _WIN32
		1012	if (_access (rel, 4) != 0)
		1013	return -1;
		1014
		1015	symlinks = GetFullPathName (rel, EIO_PATH_MAX * 3, res, 0);
		1016
		1017	errno = ENAMETOOLONG;
		1018	if (symlinks >= EIO_PATH_MAX * 3)
		1019	return -1;
		1020
		1021	errno = EIO;
		1022	if (symlinks <= 0)
		1023	return -1;
		1024
		1025	return symlinks;
		1026
		1027	#else
1410	tmp1 = res + PATH_MAX;	1028	tmp1 = res + EIO_PATH_MAX;
1411	tmp2 = tmp1 + PATH_MAX;	1029	tmp2 = tmp1 + EIO_PATH_MAX;
1412		1030
1413	#if 0 /* disabled, the musl way to do things is just too racy */	1031	#if 0 /* disabled, the musl way to do things is just too racy */
1414	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)	1032	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
1415	/* on linux we may be able to ask the kernel */	1033	/* on linux we may be able to ask the kernel */
1416	{	1034	{
1417	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);	1035	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
1418		1036
1419	if (fd >= 0)	1037	if (fd >= 0)
1420	{	1038	{
1421	sprintf (tmp1, "/proc/self/fd/%d", fd);	1039	sprintf (tmp1, "/proc/self/fd/%d", fd);
1422	req->result = readlink (tmp1, res, PATH_MAX);	1040	req->result = readlink (tmp1, res, EIO_PATH_MAX);
1423	close (fd);
1424
1425	/* here we should probably stat the open file and the disk file, to make sure they still match */	1041	/* here we should probably stat the open file and the disk file, to make sure they still match */
		1042	eio__close (fd);
1426		1043
1427	if (req->result > 0)	1044	if (req->result > 0)
1428	goto done;	1045	goto done;
1429	}	1046	}
1430	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)	1047	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
1431	return;	1048	return -1;
1432	}	1049	}
1433	#endif	1050	#endif
1434	#endif	1051	#endif
1435		1052
1436	if (*rel != '/')	1053	if (*rel != '/')
1437	{	1054	{
1438	if (!eio__getwd (tmpbuf, wd))	1055	int len;
		1056
		1057	errno = ENOENT;
		1058	if (wd == EIO_INVALID_WD)
1439	return -1;	1059	return -1;
		1060
		1061	if (wd == EIO_CWD)
		1062	{
		1063	if (!getcwd (res, EIO_PATH_MAX))
		1064	return -1;
		1065
		1066	len = strlen (res);
		1067	}
		1068	else
		1069	memcpy (res, wd->str, len = wd->len);
1440		1070
1441	if (res [1]) /* only use if not / */	1071	if (res [1]) /* only use if not / */
1442	res += strlen (res);	1072	res += len;
1443	}	1073	}
1444		1074
1445	while (*rel)	1075	while (*rel)
1446	{	1076	{
1447	eio_ssize_t len, linklen;	1077	eio_ssize_t len, linklen;
…		…
1475	}	1105	}
1476	}	1106	}
1477		1107
1478	errno = ENAMETOOLONG;	1108	errno = ENAMETOOLONG;
1479	if (res + 1 + len + 1 >= tmp1)	1109	if (res + 1 + len + 1 >= tmp1)
1480	return;	1110	return -1;
1481		1111
1482	/* copy one component */	1112	/* copy one component */
1483	*res = '/';	1113	*res = '/';
1484	memcpy (res + 1, beg, len);	1114	memcpy (res + 1, beg, len);
1485		1115
1486	/* zero-terminate, for readlink */	1116	/* zero-terminate, for readlink */
1487	res [len + 1] = 0;	1117	res [len + 1] = 0;
1488		1118
1489	/* now check if it's a symlink */	1119	/* now check if it's a symlink */
1490	linklen = readlink (tmpbuf->ptr, tmp1, PATH_MAX);	1120	linklen = readlink (tmpbuf->ptr, tmp1, EIO_PATH_MAX);
1491		1121
1492	if (linklen < 0)	1122	if (linklen < 0)
1493	{	1123	{
1494	if (errno != EINVAL)	1124	if (errno != EINVAL)
1495	return -1;	1125	return -1;
…		…
1501	{	1131	{
1502	/* yay, it was a symlink - build new path in tmp2 */	1132	/* yay, it was a symlink - build new path in tmp2 */
1503	int rellen = strlen (rel);	1133	int rellen = strlen (rel);
1504		1134
1505	errno = ENAMETOOLONG;	1135	errno = ENAMETOOLONG;
1506	if (linklen + 1 + rellen >= PATH_MAX)	1136	if (linklen + 1 + rellen >= EIO_PATH_MAX) /* also catch linklen >= EIO_PATH_MAX */
1507	return -1;	1137	return -1;
1508		1138
1509	errno = ELOOP;	1139	errno = ELOOP;
1510	if (!--symlinks)	1140	if (!--symlinks)
1511	return -1;	1141	return -1;
…		…
1525	/* special case for the lone root path */	1155	/* special case for the lone root path */
1526	if (res == tmpbuf->ptr)	1156	if (res == tmpbuf->ptr)
1527	*res++ = '/';	1157	*res++ = '/';
1528		1158
1529	return res - (char *)tmpbuf->ptr;	1159	return res - (char *)tmpbuf->ptr;
		1160	#endif
1530	}	1161	}
1531		1162
1532	static signed char	1163	static signed char
1533	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)	1164	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
1534	{	1165	{
…		…
1694	eio_dent_insertion_sort (dents, size);	1325	eio_dent_insertion_sort (dents, size);
1695	}	1326	}
1696		1327
1697	/* read a full directory */	1328	/* read a full directory */
1698	static void	1329	static void
1699	eio__scandir (eio_req *req)	1330	eio__scandir (eio_req *req, etp_worker *self)
1700	{	1331	{
1701	char *name, *names;	1332	char *name, *names;
1702	int namesalloc = 4096 - sizeof (void *) * 4;	1333	int namesalloc = 4096 - sizeof (void *) * 4;
1703	int namesoffs = 0;	1334	int namesoffs = 0;
1704	int flags = req->int1;	1335	int flags = req->int1;
…		…
1722	#ifdef _WIN32	1353	#ifdef _WIN32
1723	{	1354	{
1724	int len = strlen ((const char *)req->ptr1);	1355	int len = strlen ((const char *)req->ptr1);
1725	char *path = malloc (MAX_PATH);	1356	char *path = malloc (MAX_PATH);
1726	const char *fmt;	1357	const char *fmt;
		1358	const char *reqpath = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
1727		1359
1728	if (!len)	1360	if (!len)
1729	fmt = "./*";	1361	fmt = "./*";
1730	else if (((const char *)req->ptr1)[len - 1] == '/' || ((const char *)req->ptr1)[len - 1] == '\\')	1362	else if (reqpath[len - 1] == '/' || reqpath[len - 1] == '\\')
1731	fmt = "%s*";	1363	fmt = "%s*";
1732	else	1364	else
1733	fmt = "%s/*";	1365	fmt = "%s/*";
1734		1366
1735	_snprintf (path, MAX_PATH, fmt, (const char *)req->ptr1);	1367	_snprintf (path, MAX_PATH, fmt, reqpath);
1736	dirp = FindFirstFile (path, &entp);	1368	dirp = FindFirstFile (path, &entp);
1737	free (path);	1369	free (path);
1738		1370
1739	if (dirp == INVALID_HANDLE_VALUE)	1371	if (dirp == INVALID_HANDLE_VALUE)
1740	{	1372	{
…		…
1762		1394
1763	return;	1395	return;
1764	}	1396	}
1765	}	1397	}
1766	#else	1398	#else
		1399	#if HAVE_AT
		1400	if (req->wd)
		1401	{
		1402	int fd = openat (WD2FD (req->wd), req->ptr1, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
		1403
		1404	if (fd < 0)
		1405	return;
		1406
		1407	dirp = fdopendir (fd);
		1408
		1409	if (!dirp)
		1410	silent_close (fd);
		1411	}
		1412	else
1767	dirp = opendir (req->ptr1);	1413	dirp = opendir (req->ptr1);
		1414	#else
		1415	dirp = opendir (wd_expand (&self->tmpbuf, req->wd, req->ptr1));
		1416	#endif
1768		1417
1769	if (!dirp)	1418	if (!dirp)
1770	return;	1419	return;
1771	#endif	1420	#endif
1772		1421
…		…
1889	#ifdef DT_FIFO	1538	#ifdef DT_FIFO
1890	case DT_FIFO: ent->type = EIO_DT_FIFO; break;	1539	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
1891	#endif	1540	#endif
1892	#ifdef DT_CHR	1541	#ifdef DT_CHR
1893	case DT_CHR: ent->type = EIO_DT_CHR; break;	1542	case DT_CHR: ent->type = EIO_DT_CHR; break;
1894	#endif	1543	#endif
1895	#ifdef DT_MPC	1544	#ifdef DT_MPC
1896	case DT_MPC: ent->type = EIO_DT_MPC; break;	1545	case DT_MPC: ent->type = EIO_DT_MPC; break;
1897	#endif	1546	#endif
1898	#ifdef DT_DIR	1547	#ifdef DT_DIR
1899	case DT_DIR: ent->type = EIO_DT_DIR; break;	1548	case DT_DIR: ent->type = EIO_DT_DIR; break;
1900	#endif	1549	#endif
1901	#ifdef DT_NAM	1550	#ifdef DT_NAM
1902	case DT_NAM: ent->type = EIO_DT_NAM; break;	1551	case DT_NAM: ent->type = EIO_DT_NAM; break;
1903	#endif	1552	#endif
1904	#ifdef DT_BLK	1553	#ifdef DT_BLK
1905	case DT_BLK: ent->type = EIO_DT_BLK; break;	1554	case DT_BLK: ent->type = EIO_DT_BLK; break;
1906	#endif	1555	#endif
1907	#ifdef DT_MPB	1556	#ifdef DT_MPB
1908	case DT_MPB: ent->type = EIO_DT_MPB; break;	1557	case DT_MPB: ent->type = EIO_DT_MPB; break;
1909	#endif	1558	#endif
1910	#ifdef DT_REG	1559	#ifdef DT_REG
1911	case DT_REG: ent->type = EIO_DT_REG; break;	1560	case DT_REG: ent->type = EIO_DT_REG; break;
1912	#endif	1561	#endif
1913	#ifdef DT_NWK	1562	#ifdef DT_NWK
1914	case DT_NWK: ent->type = EIO_DT_NWK; break;	1563	case DT_NWK: ent->type = EIO_DT_NWK; break;
1915	#endif	1564	#endif
1916	#ifdef DT_CMP	1565	#ifdef DT_CMP
1917	case DT_CMP: ent->type = EIO_DT_CMP; break;	1566	case DT_CMP: ent->type = EIO_DT_CMP; break;
1918	#endif	1567	#endif
1919	#ifdef DT_LNK	1568	#ifdef DT_LNK
1920	case DT_LNK: ent->type = EIO_DT_LNK; break;	1569	case DT_LNK: ent->type = EIO_DT_LNK; break;
1921	#endif	1570	#endif
1922	#ifdef DT_SOCK	1571	#ifdef DT_SOCK
1923	case DT_SOCK: ent->type = EIO_DT_SOCK; break;	1572	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
…		…
1936	{	1585	{
1937	if (ent->type == EIO_DT_UNKNOWN)	1586	if (ent->type == EIO_DT_UNKNOWN)
1938	{	1587	{
1939	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */	1588	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
1940	ent->score = 1;	1589	ent->score = 1;
1941	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */	1590	else if (!strchr (name, '.')) /* absence of dots indicate likely dirs */
1942	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */	1591	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1943	}	1592	}
1944	else if (ent->type == EIO_DT_DIR)	1593	else if (ent->type == EIO_DT_DIR)
1945	ent->score = 0;	1594	ent->score = 0;
1946	}	1595	}
…		…
1966	}	1615	}
1967	}	1616	}
1968		1617
1969	/*****************************************************************************/	1618	/*****************************************************************************/
1970	/* working directory stuff */	1619	/* working directory stuff */
		1620	/* various deficiencies in the posix 2008 api force us to */
		1621	/* keep the absolute path in string form at all times */
		1622	/* fuck yeah. */
		1623
		1624	#if !HAVE_AT
		1625
		1626	/* a bit like realpath, but usually faster because it doesn'T have to return */
		1627	/* an absolute or canonical path */
		1628	static const char *
		1629	wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
		1630	{
		1631	if (!wd || *path == '/')
		1632	return path;
		1633
		1634	if (path [0] == '.' && !path [1])
		1635	return wd->str;
		1636
		1637	{
		1638	int l1 = wd->len;
		1639	int l2 = strlen (path);
		1640
		1641	char *res = etp_tmpbuf_get (tmpbuf, l1 + l2 + 2);
		1642
		1643	memcpy (res, wd->str, l1);
		1644	res [l1] = '/';
		1645	memcpy (res + l1 + 1, path, l2 + 1);
		1646
		1647	return res;
		1648	}
		1649	}
		1650
		1651	#endif
		1652
		1653	static eio_wd
		1654	eio__wd_open_sync (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
		1655	{
		1656	int fd;
		1657	eio_wd res;
		1658	int len = eio__realpath (tmpbuf, wd, path);
		1659
		1660	if (len < 0)
		1661	return EIO_INVALID_WD;
1971		1662
1972	#if HAVE_AT	1663	#if HAVE_AT
		1664	fd = openat (WD2FD (wd), path, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
1973		1665
1974	#define WD2FD(wd) ((wd) ? ((int)(long)(wd)) - 1 : AT_FDCWD)	1666	if (fd < 0)
1975		1667	return EIO_INVALID_WD;
1976	#ifndef O_SEARCH
1977	# define O_SEARCH O_RDONLY
1978	#endif	1668	#endif
		1669
		1670	res = malloc (sizeof (*res) + len); /* one extra 0-byte */
		1671
		1672	#if HAVE_AT
		1673	res->fd = fd;
		1674	#endif
		1675
		1676	res->len = len;
		1677	memcpy (res->str, tmpbuf->ptr, len);
		1678	res->str [len] = 0;
		1679
		1680	return res;
		1681	}
1979		1682
1980	eio_wd	1683	eio_wd
1981	eio_wd_open_sync (eio_wd wd, const char *path)	1684	eio_wd_open_sync (eio_wd wd, const char *path)
1982	{	1685	{
1983	int fd = openat (WD2FD (wd), path, O_CLOEXEC | O_SEARCH | O_DIRECTORY);	1686	struct etp_tmpbuf tmpbuf = { };
1984
1985	return fd >= 0 ? (eio_wd)(long)(fd + 1) : EIO_INVALID_WD;
1986	}
1987
1988	static eio_wd
1989	eio__wd_open_sync (struct tmpbuf *tmpbuf, eio_wd wd, const char *path)
1990	{
1991	return eio_wd_open_sync (wd, path);	1687	wd = eio__wd_open_sync (&tmpbuf, wd, path);
		1688	free (tmpbuf.ptr);
		1689
		1690	return wd;
1992	}	1691	}
1993		1692
1994	void	1693	void
1995	eio_wd_close_sync (eio_wd wd)	1694	eio_wd_close_sync (eio_wd wd)
1996	{	1695	{
1997	int fd = WD2FD (wd);	1696	if (wd != EIO_INVALID_WD && wd != EIO_CWD)
1998		1697	{
1999	if (fd >= 0)	1698	#if HAVE_AT
2000	close (fd);	1699	eio__close (wd->fd);
		1700	#endif
		1701	free (wd);
		1702	}
2001	}	1703	}
		1704
		1705	#if HAVE_AT
		1706
		1707	static int
		1708	eio__renameat2 (int olddirfd, const char *oldpath, int newdirfd, const char *newpath, unsigned int flags)
		1709	{
		1710	#if HAVE_RENAMEAT2
		1711	return syscall (SYS_renameat2, olddirfd, oldpath, newdirfd, newpath, flags);
		1712	#else
		1713	if (flags)
		1714	return EIO_ENOSYS ();
		1715
		1716	return renameat (olddirfd, oldpath, newdirfd, newpath);
		1717	#endif
		1718	}
		1719
		1720	/* they forgot these */
2002		1721
2003	static int	1722	static int
2004	eio__truncateat (int dirfd, const char *path, off_t length)	1723	eio__truncateat (int dirfd, const char *path, off_t length)
2005	{	1724	{
2006	int fd = openat (dirfd, path, O_WRONLY | O_CLOEXEC);	1725	int fd = openat (dirfd, path, O_WRONLY | O_CLOEXEC);
…		…
2008		1727
2009	if (fd < 0)	1728	if (fd < 0)
2010	return fd;	1729	return fd;
2011		1730
2012	res = ftruncate (fd, length);	1731	res = ftruncate (fd, length);
2013	close (fd);	1732	silent_close (fd);
2014	return res;	1733	return res;
2015	}	1734	}
2016		1735
2017	static int	1736	static int
2018	eio__statvfsat (int dirfd, const char *path, struct statvfs *buf)	1737	eio__statvfsat (int dirfd, const char *path, struct statvfs *buf)
…		…
2022		1741
2023	if (fd < 0)	1742	if (fd < 0)
2024	return fd;	1743	return fd;
2025		1744
2026	res = fstatvfs (fd, buf);	1745	res = fstatvfs (fd, buf);
2027	close (fd);	1746	silent_close (fd);
2028	return res;	1747	return res;
2029
2030	}
2031
2032	#else
2033
2034	/* on legacy systems, we represent the working directories simply by their path strings */
2035
2036	static const char *
2037	wd_expand (struct tmpbuf *tmpbuf, eio_wd wd, const char *path)
2038	{
2039	if (!wd || *path == '/')
2040	return path;
2041
2042	{
2043	int l1 = strlen ((const char *)wd);
2044	int l2 = strlen (path);
2045
2046	char *res = tmpbuf_get (tmpbuf, l1 + l2 + 2);
2047
2048	memcpy (res, wd, l1);
2049	res [l1] = '/';
2050	memcpy (res + l1 + 1, path, l2 + 1);
2051
2052	return res;
2053	}
2054	}
2055
2056	static eio_wd
2057	eio__wd_open_sync (struct tmpbuf *tmpbuf, eio_wd wd, const char *path)
2058	{
2059	if (*path == '/') /* absolute paths ignore wd */
2060	path = strdup (path);
2061	else if (path [0] == '.' && !path [1]) /* special case '.', as it is common */
2062	return wd;
2063	else
2064	{
2065	int len = eio__realpath (tmpbuf, wd, path);
2066
2067	path = EIO_INVALID_WD;
2068
2069	if (len >= 0)
2070	{
2071	((char *)tmpbuf->ptr)[len] = 0;
2072	path = strdup (tmpbuf->ptr);
2073	}
2074	}
2075
2076	if (!path)
2077	path = EIO_INVALID_WD;
2078
2079	return (eio_wd)path;
2080	}
2081
2082	eio_wd
2083	eio_wd_open_sync (eio_wd wd, const char *path)
2084	{
2085	struct tmpbuf tmpbuf = { 0 };
2086	wd = eio__wd_open_sync (&tmpbuf, wd, path);
2087	free (tmpbuf.ptr);
2088
2089	return wd;
2090	}
2091
2092	void
2093	eio_wd_close_sync (eio_wd wd)
2094	{
2095	if (wd != EIO_INVALID_WD)
2096	free (wd);
2097	}	1748	}
2098		1749
2099	#endif	1750	#endif
2100		1751
2101	/*****************************************************************************/	1752	/*****************************************************************************/
2102		1753
2103	#define ALLOC(len) \	1754	#define ALLOC(len) \
2104	if (!req->ptr2) \	1755	if (!req->ptr2) \
2105	{ \	1756	{ \
2106	X_LOCK (wrklock); \	1757	X_LOCK (EIO_POOL->wrklock); \
2107	req->flags |= EIO_FLAG_PTR2_FREE; \	1758	req->flags |= EIO_FLAG_PTR2_FREE; \
2108	X_UNLOCK (wrklock); \	1759	X_UNLOCK (EIO_POOL->wrklock); \
2109	req->ptr2 = malloc (len); \	1760	req->ptr2 = malloc (len); \
2110	if (!req->ptr2) \	1761	if (!req->ptr2) \
2111	{ \	1762	{ \
2112	errno = ENOMEM; \	1763	errno = ENOMEM; \
2113	req->result = -1; \	1764	req->result = -1; \
2114	break; \	1765	goto alloc_fail; \
2115	} \	1766	} \
2116	}	1767	}
2117		1768
2118	X_THREAD_PROC (etp_proc)	1769	/*****************************************************************************/
2119	{
2120	ETP_REQ *req;
2121	struct timespec ts;
2122	etp_worker *self = (etp_worker *)thr_arg;
2123		1770
2124	#if HAVE_PRCTL_SET_NAME	1771	static void
2125	prctl (PR_SET_NAME, (unsigned long)"eio_thread", 0, 0, 0);	1772	eio__slurp (int fd, eio_req *req)
2126	#endif	1773	{
		1774	req->result = fd;
2127		1775
2128	/* try to distribute timeouts somewhat evenly */	1776	if (fd < 0)
2129	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1777	return;
2130		1778
2131	for (;;)	1779	if (req->offs < 0 || !req->size) /* do we need the size? */
2132	{	1780	{
2133	ts.tv_sec = 0;	1781	off_t size = lseek (fd, 0, SEEK_END);
2134		1782
2135	X_LOCK (reqlock);
2136
2137	for (;;)
2138	{
2139	req = reqq_shift (&req_queue);
2140
2141	if (req)
2142	break;
2143
2144	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
2145	{
2146	X_UNLOCK (reqlock);
2147	X_LOCK (wrklock);
2148	--started;
2149	X_UNLOCK (wrklock);
2150	goto quit;
2151	}
2152
2153	++idle;
2154
2155	if (idle <= max_idle)
2156	/* we are allowed to idle, so do so without any timeout */
2157	X_COND_WAIT (reqwait, reqlock);
2158	else
2159	{
2160	/* initialise timeout once */
2161	if (!ts.tv_sec)
2162	ts.tv_sec = time (0) + idle_timeout;
2163
2164	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
2165	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
2166	}
2167
2168	--idle;
2169	}
2170
2171	--nready;
2172
2173	X_UNLOCK (reqlock);
2174
2175	if (req->type < 0)	1783	if (req->offs < 0)
2176	goto quit;	1784	req->offs += size;
2177		1785
2178	ETP_EXECUTE (self, req);	1786	if (!req->size)
2179		1787	req->size = size - req->offs;
2180	X_LOCK (reslock);
2181
2182	++npending;
2183
2184	if (!reqq_push (&res_queue, req) && want_poll_cb)
2185	want_poll_cb ();
2186
2187	etp_worker_clear (self);
2188
2189	X_UNLOCK (reslock);
2190	}	1788	}
2191		1789
2192	quit:	1790	ALLOC (req->size);
2193	free (req);	1791	req->result = pread (fd, req->ptr2, req->size, req->offs);
2194		1792
2195	X_LOCK (wrklock);	1793	silent_close (fd);
2196	etp_worker_free (self);
2197	X_UNLOCK (wrklock);
2198		1794
2199	return 0;	1795	alloc_fail:
		1796	;
2200	}	1797	}
2201
2202	/*****************************************************************************/
2203		1798
2204	int ecb_cold	1799	int ecb_cold
2205	eio_init (void (*want_poll)(void), void (*done_poll)(void))	1800	eio_init (void (*want_poll)(void), void (*done_poll)(void))
2206	{	1801	{
2207	#if !HAVE_PREADWRITE	1802	eio_want_poll_cb = want_poll;
2208	X_MUTEX_CREATE (preadwritelock);	1803	eio_done_poll_cb = done_poll;
2209	#endif
2210		1804
2211	return etp_init (want_poll, done_poll);	1805	return etp_init (EIO_POOL, 0, 0, 0);
2212	}	1806	}
2213		1807
2214	ecb_inline void	1808	ecb_inline void
2215	eio_api_destroy (eio_req *req)	1809	eio_api_destroy (eio_req *req)
2216	{	1810	{
2217	free (req);	1811	free (req);
2218	}	1812	}
2219		1813
2220	#define REQ(rtype) \	1814	#define REQ(rtype) \
2221	eio_req *req; \	1815	eio_req *req; \
2222	\	1816	\
2223	req = (eio_req *)calloc (1, sizeof *req); \	1817	req = (eio_req *)calloc (1, sizeof *req); \
2224	if (!req) \	1818	if (!req) \
2225	return 0; \	1819	return 0; \
…		…
2239	{ \	1833	{ \
2240	eio_api_destroy (req); \	1834	eio_api_destroy (req); \
2241	return 0; \	1835	return 0; \
2242	}	1836	}
2243		1837
		1838	#define SINGLEDOT(ptr) (0[(char *)(ptr)] == '.' && !1[(char *)(ptr)])
		1839
2244	static void	1840	static void
2245	eio_execute (etp_worker *self, eio_req *req)	1841	eio_execute (etp_worker *self, eio_req *req)
2246	{	1842	{
2247	#if HAVE_AT	1843	#if HAVE_AT
2248	int dirfd;	1844	int dirfd;
…		…
2279	req->result = req->wd == EIO_INVALID_WD ? -1 : 0;	1875	req->result = req->wd == EIO_INVALID_WD ? -1 : 0;
2280	break;	1876	break;
2281	case EIO_WD_CLOSE: req->result = 0;	1877	case EIO_WD_CLOSE: req->result = 0;
2282	eio_wd_close_sync (req->wd); break;	1878	eio_wd_close_sync (req->wd); break;
2283		1879
		1880	case EIO_SEEK: eio__lseek (req); break;
2284	case EIO_READ: ALLOC (req->size);	1881	case EIO_READ: ALLOC (req->size);
2285	req->result = req->offs >= 0	1882	req->result = req->offs >= 0
2286	? pread (req->int1, req->ptr2, req->size, req->offs)	1883	? pread (req->int1, req->ptr2, req->size, req->offs)
2287	: read (req->int1, req->ptr2, req->size); break;	1884	: read (req->int1, req->ptr2, req->size); break;
2288	case EIO_WRITE: req->result = req->offs >= 0	1885	case EIO_WRITE: req->result = req->offs >= 0
2289	? pwrite (req->int1, req->ptr2, req->size, req->offs)	1886	? pwrite (req->int1, req->ptr2, req->size, req->offs)
2290	: write (req->int1, req->ptr2, req->size); break;	1887	: write (req->int1, req->ptr2, req->size); break;
		1888
		1889	case EIO_FCNTL: req->result = fcntl (req->int1, (int) req->int2, req->ptr2); break;
		1890	case EIO_IOCTL: req->result = ioctl (req->int1, (unsigned long)req->int2, req->ptr2); break;
2291		1891
2292	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;	1892	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
2293	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break;	1893	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break;
2294		1894
2295	#if HAVE_AT	1895	#if HAVE_AT
…		…
2300	req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, AT_SYMLINK_NOFOLLOW); break;	1900	req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, AT_SYMLINK_NOFOLLOW); break;
2301	case EIO_CHOWN: req->result = fchownat (dirfd, req->ptr1, req->int2, req->int3, 0); break;	1901	case EIO_CHOWN: req->result = fchownat (dirfd, req->ptr1, req->int2, req->int3, 0); break;
2302	case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break;	1902	case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break;
2303	case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break;	1903	case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break;
2304	case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break;	1904	case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break;
		1905	case EIO_SLURP: eio__slurp ( openat (dirfd, req->ptr1, O_RDONLY | O_CLOEXEC), req); break;
2305		1906
2306	case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break;	1907	case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break;
2307	case EIO_RMDIR: req->result = unlinkat (dirfd, req->ptr1, AT_REMOVEDIR); break;	1908	case EIO_RMDIR: /* complications arise because "." cannot be removed, so we might have to expand */
		1909	req->result = req->wd && SINGLEDOT (req->ptr1)
		1910	? rmdir (req->wd->str)
		1911	: unlinkat (dirfd, req->ptr1, AT_REMOVEDIR); break;
2308	case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break;	1912	case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break;
2309	case EIO_RENAME: req->result = renameat (dirfd, req->ptr1, WD2FD (req->int3), req->ptr2); break;	1913	case EIO_RENAME: req->result = eio__renameat2 (
		1914	dirfd,
		1915	/* complications arise because "." cannot be renamed, so we might have to expand */
		1916	req->wd && SINGLEDOT (req->ptr1) ? req->wd->str : req->ptr1,
		1917	WD2FD ((eio_wd)req->int3),
		1918	req->ptr2,
		1919	req->int2
		1920	);
		1921	break;
2310	case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD (req->int3), req->ptr2, 0); break;	1922	case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break;
2311	case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break;	1923	case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break;
2312	case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;	1924	case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
2313	case EIO_READLINK: ALLOC (PATH_MAX);
2314	req->result = readlinkat (dirfd, req->ptr1, req->ptr2, PATH_MAX); break;
2315	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));	1925	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2316	req->result = eio__statvfsat (dirfd, req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;	1926	req->result = eio__statvfsat (dirfd, req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		1927	case EIO_READLINK: ALLOC (EIO_PATH_MAX);
		1928	req->result = readlinkat (dirfd, req->ptr1, req->ptr2, EIO_PATH_MAX);
		1929	if (req->result == EIO_PATH_MAX)
		1930	{
		1931	req->result = -1;
		1932	errno = ENAMETOOLONG;
		1933	}
		1934	break;
2317	case EIO_UTIME:	1935	case EIO_UTIME:
2318	case EIO_FUTIME:	1936	case EIO_FUTIME:
2319	{	1937	{
2320	struct timespec ts[2];	1938	struct timespec ts[2];
2321	struct timespec *times;	1939	struct timespec *times;
…		…
2346	req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break;	1964	req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
2347	case EIO_CHOWN: req->result = chown (path , req->int2, req->int3); break;	1965	case EIO_CHOWN: req->result = chown (path , req->int2, req->int3); break;
2348	case EIO_CHMOD: req->result = chmod (path , (mode_t)req->int2); break;	1966	case EIO_CHMOD: req->result = chmod (path , (mode_t)req->int2); break;
2349	case EIO_TRUNCATE: req->result = truncate (path , req->offs); break;	1967	case EIO_TRUNCATE: req->result = truncate (path , req->offs); break;
2350	case EIO_OPEN: req->result = open (path , req->int1, (mode_t)req->int2); break;	1968	case EIO_OPEN: req->result = open (path , req->int1, (mode_t)req->int2); break;
		1969	case EIO_SLURP: eio__slurp ( open (path , O_RDONLY | O_CLOEXEC), req); break;
2351		1970
2352	case EIO_UNLINK: req->result = unlink (path ); break;	1971	case EIO_UNLINK: req->result = unlink (path ); break;
2353	case EIO_RMDIR: req->result = rmdir (path ); break;	1972	case EIO_RMDIR: req->result = rmdir (path ); break;
2354	case EIO_MKDIR: req->result = mkdir (path , (mode_t)req->int2); break;	1973	case EIO_MKDIR: req->result = mkdir (path , (mode_t)req->int2); break;
2355	case EIO_RENAME: req->result = rename (path , req->ptr2); break;	1974	case EIO_RENAME: req->result = req->int2 ? EIO_ENOSYS () : rename (path, req->ptr2); break;
2356	case EIO_LINK: req->result = link (path , req->ptr2); break;	1975	case EIO_LINK: req->result = link (path , req->ptr2); break;
2357	case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break;	1976	case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break;
2358	case EIO_MKNOD: req->result = mknod (path , (mode_t)req->int2, (dev_t)req->offs); break;	1977	case EIO_MKNOD: req->result = mknod (path , (mode_t)req->int2, (dev_t)req->offs); break;
2359	case EIO_READLINK: ALLOC (PATH_MAX);
2360	req->result = readlink (path, req->ptr2, PATH_MAX); break;
2361	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));	1978	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2362	req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break;	1979	req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break;
		1980	case EIO_READLINK: ALLOC (EIO_PATH_MAX);
		1981	req->result = readlink (path, req->ptr2, EIO_PATH_MAX);
		1982	if (req->result == EIO_PATH_MAX)
		1983	{
		1984	req->result = -1;
		1985	errno = ENAMETOOLONG;
		1986	}
		1987	break;
2363		1988
2364	case EIO_UTIME:	1989	case EIO_UTIME:
2365	case EIO_FUTIME:	1990	case EIO_FUTIME:
2366	{	1991	{
2367	struct timeval tv[2];	1992	struct timeval tv[2];
…		…
2402		2027
2403	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;	2028	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
2404	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;	2029	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
2405	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;	2030	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
2406		2031
2407	case EIO_CLOSE: req->result = close (req->int1); break;	2032	case EIO_CLOSE: req->result = eio__close (req->int1); break;
2408	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;	2033	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
2409	case EIO_SYNC: req->result = 0; sync (); break;	2034	case EIO_SYNC: req->result = 0; sync (); break;
2410	case EIO_FSYNC: req->result = fsync (req->int1); break;	2035	case EIO_FSYNC: req->result = fsync (req->int1); break;
2411	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;	2036	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
2412	case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break;	2037	case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break;
…		…
2415	case EIO_MTOUCH: req->result = eio__mtouch (req); break;	2040	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
2416	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;	2041	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
2417	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;	2042	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
2418	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;	2043	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
2419		2044
2420	case EIO_READDIR: eio__scandir (req); break;	2045	case EIO_READDIR: eio__scandir (req, self); break;
2421		2046
2422	case EIO_BUSY:	2047	case EIO_BUSY:
2423	#ifdef _WIN32	2048	#ifdef _WIN32
2424	Sleep (req->nv1 * 1e3);	2049	Sleep (req->nv1 * 1e3);
2425	#else	2050	#else
…		…
2432	req->result = select (0, 0, 0, 0, &tv);	2057	req->result = select (0, 0, 0, 0, &tv);
2433	}	2058	}
2434	#endif	2059	#endif
2435	break;	2060	break;
2436		2061
		2062	#if 0
2437	case EIO_GROUP:	2063	case EIO_GROUP:
2438	abort (); /* handled in eio_request */	2064	abort (); /* handled in eio_request */
		2065	#endif
2439		2066
2440	case EIO_NOP:	2067	case EIO_NOP:
2441	req->result = 0;	2068	req->result = 0;
2442	break;	2069	break;
2443		2070
2444	case EIO_CUSTOM:	2071	case EIO_CUSTOM:
2445	req->feed (req);	2072	req->feed (req);
2446	break;	2073	break;
2447		2074
2448	default:	2075	default:
2449	errno = ENOSYS;
2450	req->result = -1;	2076	req->result = EIO_ENOSYS ();
2451	break;	2077	break;
2452	}	2078	}
2453		2079
		2080	alloc_fail:
2454	req->errorno = errno;	2081	req->errorno = errno;
2455	}	2082	}
2456		2083
2457	#ifndef EIO_NO_WRAPPERS	2084	#ifndef EIO_NO_WRAPPERS
2458		2085
		2086	eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data)
		2087	{
		2088	REQ (EIO_WD_OPEN); PATH; SEND;
		2089	}
		2090
		2091	eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data)
		2092	{
		2093	REQ (EIO_WD_CLOSE); req->wd = wd; SEND;
		2094	}
		2095
2459	eio_req *eio_nop (int pri, eio_cb cb, void *data)	2096	eio_req *eio_nop (int pri, eio_cb cb, void *data)
2460	{	2097	{
2461	REQ (EIO_NOP); SEND;	2098	REQ (EIO_NOP); SEND;
2462	}	2099	}
2463		2100
…		…
2524	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)	2161	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
2525	{	2162	{
2526	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;	2163	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
2527	}	2164	}
2528		2165
		2166	eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data)
		2167	{
		2168	REQ (EIO_SEEK); req->int1 = fd; req->offs = offset; req->int2 = whence; SEND;
		2169	}
		2170
2529	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)	2171	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
2530	{	2172	{
2531	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;	2173	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
2532	}	2174	}
2533		2175
2534	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)	2176	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
2535	{	2177	{
2536	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;	2178	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		2179	}
		2180
		2181	eio_req *eio_fcntl (int fd, int cmd, void *arg, int pri, eio_cb cb, void *data)
		2182	{
		2183	REQ (EIO_IOCTL); req->int1 = fd; req->int2 = cmd; req->ptr2 = arg; SEND;
		2184	}
		2185
		2186	eio_req *eio_ioctl (int fd, unsigned long request, void *buf, int pri, eio_cb cb, void *data)
		2187	{
		2188	REQ (EIO_IOCTL); req->int1 = fd; req->int2 = request; req->ptr2 = buf; SEND;
2537	}	2189	}
2538		2190
2539	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)	2191	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
2540	{	2192	{
2541	REQ (EIO_FSTAT); req->int1 = fd; SEND;	2193	REQ (EIO_FSTAT); req->int1 = fd; SEND;
…		…
2686	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)	2338	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2687	{	2339	{
2688	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);	2340	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
2689	}	2341	}
2690		2342
		2343	eio_req *eio_slurp (const char *path, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		2344	{
		2345	REQ (EIO_SLURP); PATH; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		2346	}
		2347
2691	eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)	2348	eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
2692	{	2349	{
2693	REQ (EIO_CUSTOM); req->feed = execute; SEND;	2350	REQ (EIO_CUSTOM); req->feed = execute; SEND;
2694	}	2351	}
2695		2352
…		…
2729	void	2386	void
2730	eio_grp_add (eio_req *grp, eio_req *req)	2387	eio_grp_add (eio_req *grp, eio_req *req)
2731	{	2388	{
2732	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2389	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
2733		2390
2734	grp->flags |= EIO_FLAG_GROUPADD;	2391	grp->flags |= ETP_FLAG_GROUPADD;
2735		2392
2736	++grp->size;	2393	++grp->size;
2737	req->grp = grp;	2394	req->grp = grp;
2738		2395
2739	req->grp_prev = 0;	2396	req->grp_prev = 0;

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