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Comparing libeio/eio.c (file contents):
Revision 1.104 by root, Mon Sep 26 16:54:25 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>
…		…
120	#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))
121		116
122	#define chmod(path,mode) _chmod (path, mode)	117	#define chmod(path,mode) _chmod (path, mode)
123	#define dup(fd) _dup (fd)	118	#define dup(fd) _dup (fd)
124	#define dup2(fd1,fd2) _dup2 (fd1, fd2)	119	#define dup2(fd1,fd2) _dup2 (fd1, fd2)
		120	#define pipe(fds) _pipe (fds, 4096, O_BINARY)
125		121
		122	#define fcntl(fd,cmd,arg) EIO_ENOSYS ()
		123	#define ioctl(fd,cmd,arg) EIO_ENOSYS ()
126	#define fchmod(fd,mode) EIO_ENOSYS ()	124	#define fchmod(fd,mode) EIO_ENOSYS ()
127	#define chown(path,uid,gid) EIO_ENOSYS ()	125	#define chown(path,uid,gid) EIO_ENOSYS ()
128	#define fchown(fd,uid,gid) EIO_ENOSYS ()	126	#define fchown(fd,uid,gid) EIO_ENOSYS ()
129	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */	127	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
130	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */	128	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
131	#define mknod(path,mode,dev) EIO_ENOSYS ()	129	#define mknod(path,mode,dev) EIO_ENOSYS ()
132	#define sync() EIO_ENOSYS ()	130	#define sync() EIO_ENOSYS ()
133	#define readlink(path,buf,s) EIO_ENOSYS ()	131	#define readlink(path,buf,s) EIO_ENOSYS ()
134	#define statvfs(path,buf) EIO_ENOSYS ()	132	#define statvfs(path,buf) EIO_ENOSYS ()
135	#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	}
136		169
137	/* rename() uses MoveFile, which fails to overwrite */	170	/* rename() uses MoveFile, which fails to overwrite */
138	#define rename(old,neu) eio__rename (old, neu)	171	#define rename(old,neu) eio__rename (old, neu)
139		172
140	static int	173	static int
…		…
168	/* we could even stat and see if it exists */	201	/* we could even stat and see if it exists */
169	static int	202	static int
170	symlink (const char *old, const char *neu)	203	symlink (const char *old, const char *neu)
171	{	204	{
172	#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)
173	if (CreateSymbolicLink (neu, old, 1))	213	if (CreateSymbolicLink (neu, old, flags))
174	return 0;	214	return 0;
175
176	if (CreateSymbolicLink (neu, old, 0))
177	return 0;
178	#endif	215	#endif
179		216
180	return EIO_ERRNO (ENOENT, -1);	217	return EIO_ERRNO (ENOENT, -1);
181	}	218	}
182		219
183	/* POSIX API only */	220	/* POSIX API only, causing trouble for win32 apps */
184	#define CreateHardLink(neu,old,flags) 0	221	#define CreateHardLink(neu,old,flags) 0 /* not really creating hardlink, still using relative paths? */
185	#define CreateSymbolicLink(neu,old,flags) 0	222	#define CreateSymbolicLink(neu,old,flags) 0 /* vista+ only */
186		223
187	struct statvfs	224	struct statvfs
188	{	225	{
189	int dummy;	226	int dummy;
190	};	227	};
…		…
194	#define D_NAME(entp) entp.cFileName	231	#define D_NAME(entp) entp.cFileName
195	#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)
196		233
197	#else	234	#else
198		235
		236	#include <sys/ioctl.h>
199	#include <sys/time.h>	237	#include <sys/time.h>
200	#include <sys/select.h>	238	#include <sys/select.h>
201	#include <sys/statvfs.h>
202	#include <unistd.h>	239	#include <unistd.h>
203	#include <signal.h>	240	#include <signal.h>
204	#include <dirent.h>	241	#include <dirent.h>
205		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
206	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES	252	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
207	#include <sys/mman.h>	253	#include <sys/mman.h>
208	#endif	254	#endif
209		255
210	#define D_NAME(entp) entp->d_name	256	#define D_NAME(entp) entp->d_name
211		257
212	/* 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 */
213	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__	259	#if __FreeBSD__ || __NetBSD__ || __OpenBSD__
214	#define _DIRENT_HAVE_D_TYPE /* sigh */	260	#define _DIRENT_HAVE_D_TYPE /* sigh */
215	#define D_INO(de) (de)->d_fileno	261	#define D_INO(de) (de)->d_fileno
216	#define D_NAMLEN(de) (de)->d_namlen	262	#define D_NAMLEN(de) (de)->d_namlen
217	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600	263	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
218	#define D_INO(de) (de)->d_ino	264	#define D_INO(de) (de)->d_ino
…		…
237	# include <utime.h>	283	# include <utime.h>
238	#endif	284	#endif
239		285
240	#if HAVE_SYS_SYSCALL_H	286	#if HAVE_SYS_SYSCALL_H
241	# include <sys/syscall.h>	287	# include <sys/syscall.h>
242	#endif
243
244	#if HAVE_SYS_PRCTL_H
245	# include <sys/prctl.h>
246	#endif	288	#endif
247		289
248	#if HAVE_SENDFILE	290	#if HAVE_SENDFILE
249	# if __linux	291	# if __linux
250	# include <sys/sendfile.h>	292	# include <sys/sendfile.h>
…		…
258	# else	300	# else
259	# error sendfile support requested but not available	301	# error sendfile support requested but not available
260	# endif	302	# endif
261	#endif	303	#endif
262		304
		305	#if HAVE_RENAMEAT2
		306	# include <sys/syscall.h>
		307	# include <linux/fs.h>
		308	#endif
		309
263	#ifndef D_TYPE	310	#ifndef D_TYPE
264	# define D_TYPE(de) 0	311	# define D_TYPE(de) 0
265	#endif	312	#endif
266	#ifndef D_INO	313	#ifndef D_INO
267	# define D_INO(de) 0	314	# define D_INO(de) 0
…		…
275	# define NAME_MAX 4096	322	# define NAME_MAX 4096
276	#endif	323	#endif
277		324
278	/* used for readlink etc. */	325	/* used for readlink etc. */
279	#ifndef PATH_MAX	326	#ifndef PATH_MAX
280	# define PATH_MAX 4096	327	# define PATH_MAX 0
281	#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)
282		339
283	/* buffer size for various temporary buffers */	340	/* buffer size for various temporary buffers */
284	#define EIO_BUFSIZE 65536	341	#define EIO_BUFSIZE 65536
285		342
286	#define dBUF \	343	#define dBUF \
287	char *eio_buf = malloc (EIO_BUFSIZE); \	344	char *eio_buf = malloc (EIO_BUFSIZE); \
288	errno = ENOMEM; \	345	errno = ENOMEM; \
289	if (!eio_buf) \	346	if (!eio_buf) \
290	return -1	347	return -1
291		348
292	#define FUBd \	349	#define FUBd \
293	free (eio_buf)	350	free (eio_buf)
294		351
295	#define EIO_TICKS ((1000000 + 1023) >> 10)
296
297	/*****************************************************************************/	352	/*****************************************************************************/
298		353
299	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
300	{	368	{
301	void *ptr;	369	#if HAVE_AT
		370	int fd;
		371	#endif
302	int len;	372	int len;
		373	char str[1]; /* actually, a 0-terminated canonical path */
303	};	374	};
304
305	static void *
306	tmpbuf_get (struct tmpbuf *buf, int len)
307	{
308	if (buf->len < len)
309	{
310	free (buf->ptr);
311	buf->ptr = malloc (buf->len = len);
312	}
313
314	return buf->ptr;
315	}
316		375
317	/*****************************************************************************/	376	/*****************************************************************************/
318		377
319	#define ETP_PRI_MIN EIO_PRI_MIN	378	#define ETP_PRI_MIN EIO_PRI_MIN
320	#define ETP_PRI_MAX EIO_PRI_MAX	379	#define ETP_PRI_MAX EIO_PRI_MAX
321		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
322	struct etp_worker;	391	struct etp_worker;
323
324	#define ETP_REQ eio_req	392	#define ETP_REQ eio_req
325	#define ETP_DESTROY(req) eio_destroy (req)	393	#define ETP_DESTROY(req) eio_destroy (req)
326	static int eio_finish (eio_req *req);	394	static int eio_finish (eio_req *req);
327	#define ETP_FINISH(req) eio_finish (req)	395	#define ETP_FINISH(req) eio_finish (req)
328	static void eio_execute (struct etp_worker *self, eio_req *req);	396	static void eio_execute (struct etp_worker *self, eio_req *req);
329	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)	397	#define ETP_EXECUTE(wrk,req) eio_execute (wrk, req)
330		398
331	/*****************************************************************************/	399	#include "etp.c"
332		400
333	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)	401	static struct etp_pool eio_pool;
334		402	#define EIO_POOL (&eio_pool)
335	/* calculate time difference in ~1/EIO_TICKS of a second */
336	ecb_inline int
337	tvdiff (struct timeval *tv1, struct timeval *tv2)
338	{
339	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
340	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
341	}
342
343	static unsigned int started, idle, wanted = 4;
344
345	static void (*want_poll_cb) (void);
346	static void (*done_poll_cb) (void);
347
348	static unsigned int max_poll_time; /* reslock */
349	static unsigned int max_poll_reqs; /* reslock */
350
351	static unsigned int nreqs; /* reqlock */
352	static unsigned int nready; /* reqlock */
353	static unsigned int npending; /* reqlock */
354	static unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
355	static unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
356
357	static xmutex_t wrklock;
358	static xmutex_t reslock;
359	static xmutex_t reqlock;
360	static xcond_t reqwait;
361
362	#if !HAVE_PREADWRITE
363	/*
364	* make our pread/pwrite emulation safe against themselves, but not against
365	* normal read/write by using a mutex. slows down execution a lot,
366	* but that's your problem, not mine.
367	*/
368	static xmutex_t preadwritelock;
369	#endif
370
371	typedef struct etp_worker
372	{
373	struct tmpbuf tmpbuf;
374
375	/* locked by wrklock */
376	struct etp_worker *prev, *next;
377
378	xthread_t tid;
379
380	#ifdef ETP_WORKER_COMMON
381	ETP_WORKER_COMMON
382	#endif
383	} etp_worker;
384
385	static etp_worker wrk_first; /* NOT etp */
386
387	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
388	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
389
390	/* worker threads management */
391
392	static void ecb_cold
393	etp_worker_clear (etp_worker *wrk)
394	{
395	}
396
397	static void ecb_cold
398	etp_worker_free (etp_worker *wrk)
399	{
400	free (wrk->tmpbuf.ptr);
401
402	wrk->next->prev = wrk->prev;
403	wrk->prev->next = wrk->next;
404
405	free (wrk);
406	}
407
408	static unsigned int
409	etp_nreqs (void)
410	{
411	int retval;
412	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
413	retval = nreqs;
414	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
415	return retval;
416	}
417
418	static unsigned int
419	etp_nready (void)
420	{
421	unsigned int retval;
422
423	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
424	retval = nready;
425	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
426
427	return retval;
428	}
429
430	static unsigned int
431	etp_npending (void)
432	{
433	unsigned int retval;
434
435	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
436	retval = npending;
437	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
438
439	return retval;
440	}
441
442	static unsigned int
443	etp_nthreads (void)
444	{
445	unsigned int retval;
446
447	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
448	retval = started;
449	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
450
451	return retval;
452	}
453
454	/*
455	* a somewhat faster data structure might be nice, but
456	* with 8 priorities this actually needs <20 insns
457	* per shift, the most expensive operation.
458	*/
459	typedef struct {
460	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
461	int size;
462	} etp_reqq;
463
464	static etp_reqq req_queue;
465	static etp_reqq res_queue;
466
467	static void ecb_noinline ecb_cold
468	reqq_init (etp_reqq *q)
469	{
470	int pri;
471
472	for (pri = 0; pri < ETP_NUM_PRI; ++pri)
473	q->qs[pri] = q->qe[pri] = 0;
474
475	q->size = 0;
476	}
477
478	static int ecb_noinline
479	reqq_push (etp_reqq *q, ETP_REQ *req)
480	{
481	int pri = req->pri;
482	req->next = 0;
483
484	if (q->qe[pri])
485	{
486	q->qe[pri]->next = req;
487	q->qe[pri] = req;
488	}
489	else
490	q->qe[pri] = q->qs[pri] = req;
491
492	return q->size++;
493	}
494
495	static ETP_REQ * ecb_noinline
496	reqq_shift (etp_reqq *q)
497	{
498	int pri;
499
500	if (!q->size)
501	return 0;
502
503	--q->size;
504
505	for (pri = ETP_NUM_PRI; pri--; )
506	{
507	eio_req *req = q->qs[pri];
508
509	if (req)
510	{
511	if (!(q->qs[pri] = (eio_req *)req->next))
512	q->qe[pri] = 0;
513
514	return req;
515	}
516	}
517
518	abort ();
519	}
520
521	static int ecb_cold
522	etp_init (void (*want_poll)(void), void (*done_poll)(void))
523	{
524	X_MUTEX_CREATE (wrklock);
525	X_MUTEX_CREATE (reslock);
526	X_MUTEX_CREATE (reqlock);
527	X_COND_CREATE (reqwait);
528
529	reqq_init (&req_queue);
530	reqq_init (&res_queue);
531
532	wrk_first.next =
533	wrk_first.prev = &wrk_first;
534
535	started = 0;
536	idle = 0;
537	nreqs = 0;
538	nready = 0;
539	npending = 0;
540
541	want_poll_cb = want_poll;
542	done_poll_cb = done_poll;
543
544	return 0;
545	}
546
547	X_THREAD_PROC (etp_proc);
548
549	static void ecb_cold
550	etp_start_thread (void)
551	{
552	etp_worker *wrk = calloc (1, sizeof (etp_worker));
553
554	/*TODO*/
555	assert (("unable to allocate worker thread data", wrk));
556
557	X_LOCK (wrklock);
558
559	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
560	{
561	wrk->prev = &wrk_first;
562	wrk->next = wrk_first.next;
563	wrk_first.next->prev = wrk;
564	wrk_first.next = wrk;
565	++started;
566	}
567	else
568	free (wrk);
569
570	X_UNLOCK (wrklock);
571	}
572
573	static void
574	etp_maybe_start_thread (void)
575	{
576	if (ecb_expect_true (etp_nthreads () >= wanted))
577	return;
578
579	/* todo: maybe use idle here, but might be less exact */
580	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
581	return;
582
583	etp_start_thread ();
584	}
585
586	static void ecb_cold
587	etp_end_thread (void)
588	{
589	eio_req *req = calloc (1, sizeof (eio_req));
590
591	req->type = -1;
592	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
593
594	X_LOCK (reqlock);
595	reqq_push (&req_queue, req);
596	X_COND_SIGNAL (reqwait);
597	X_UNLOCK (reqlock);
598
599	X_LOCK (wrklock);
600	--started;
601	X_UNLOCK (wrklock);
602	}
603
604	static int
605	etp_poll (void)
606	{
607	unsigned int maxreqs;
608	unsigned int maxtime;
609	struct timeval tv_start, tv_now;
610
611	X_LOCK (reslock);
612	maxreqs = max_poll_reqs;
613	maxtime = max_poll_time;
614	X_UNLOCK (reslock);
615
616	if (maxtime)
617	gettimeofday (&tv_start, 0);
618
619	for (;;)
620	{
621	ETP_REQ *req;
622
623	etp_maybe_start_thread ();
624
625	X_LOCK (reslock);
626	req = reqq_shift (&res_queue);
627
628	if (req)
629	{
630	--npending;
631
632	if (!res_queue.size && done_poll_cb)
633	done_poll_cb ();
634	}
635
636	X_UNLOCK (reslock);
637
638	if (!req)
639	return 0;
640
641	X_LOCK (reqlock);
642	--nreqs;
643	X_UNLOCK (reqlock);
644
645	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
646	{
647	req->int1 = 1; /* mark request as delayed */
648	continue;
649	}
650	else
651	{
652	int res = ETP_FINISH (req);
653	if (ecb_expect_false (res))
654	return res;
655	}
656
657	if (ecb_expect_false (maxreqs && !--maxreqs))
658	break;
659
660	if (maxtime)
661	{
662	gettimeofday (&tv_now, 0);
663
664	if (tvdiff (&tv_start, &tv_now) >= maxtime)
665	break;
666	}
667	}
668
669	errno = EAGAIN;
670	return -1;
671	}
672
673	static void
674	etp_cancel (ETP_REQ *req)
675	{
676	req->cancelled = 1;
677
678	eio_grp_cancel (req);
679	}
680
681	static void
682	etp_submit (ETP_REQ *req)
683	{
684	req->pri -= ETP_PRI_MIN;
685
686	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
687	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
688
689	if (ecb_expect_false (req->type == EIO_GROUP))
690	{
691	/* I hope this is worth it :/ */
692	X_LOCK (reqlock);
693	++nreqs;
694	X_UNLOCK (reqlock);
695
696	X_LOCK (reslock);
697
698	++npending;
699
700	if (!reqq_push (&res_queue, req) && want_poll_cb)
701	want_poll_cb ();
702
703	X_UNLOCK (reslock);
704	}
705	else
706	{
707	X_LOCK (reqlock);
708	++nreqs;
709	++nready;
710	reqq_push (&req_queue, req);
711	X_COND_SIGNAL (reqwait);
712	X_UNLOCK (reqlock);
713
714	etp_maybe_start_thread ();
715	}
716	}
717
718	static void ecb_cold
719	etp_set_max_poll_time (double nseconds)
720	{
721	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
722	max_poll_time = nseconds * EIO_TICKS;
723	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
724	}
725
726	static void ecb_cold
727	etp_set_max_poll_reqs (unsigned int maxreqs)
728	{
729	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
730	max_poll_reqs = maxreqs;
731	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
732	}
733
734	static void ecb_cold
735	etp_set_max_idle (unsigned int nthreads)
736	{
737	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
738	max_idle = nthreads;
739	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
740	}
741
742	static void ecb_cold
743	etp_set_idle_timeout (unsigned int seconds)
744	{
745	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
746	idle_timeout = seconds;
747	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
748	}
749
750	static void ecb_cold
751	etp_set_min_parallel (unsigned int nthreads)
752	{
753	if (wanted < nthreads)
754	wanted = nthreads;
755	}
756
757	static void ecb_cold
758	etp_set_max_parallel (unsigned int nthreads)
759	{
760	if (wanted > nthreads)
761	wanted = nthreads;
762
763	while (started > wanted)
764	etp_end_thread ();
765	}
766		403
767	/*****************************************************************************/	404	/*****************************************************************************/
768		405
769	static void	406	static void
770	grp_try_feed (eio_req *grp)	407	grp_try_feed (eio_req *grp)
771	{	408	{
772	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	409	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
773	{	410	{
774	grp->flags &= ~EIO_FLAG_GROUPADD;	411	grp->flags &= ~ETP_FLAG_GROUPADD;
775		412
776	EIO_FEED (grp);	413	EIO_FEED (grp);
777		414
778	/* stop if no progress has been made */	415	/* stop if no progress has been made */
779	if (!(grp->flags & EIO_FLAG_GROUPADD))	416	if (!(grp->flags & ETP_FLAG_GROUPADD))
780	{	417	{
781	grp->feed = 0;	418	grp->feed = 0;
782	break;	419	break;
783	}	420	}
784	}	421	}
…		…
791		428
792	/* call feeder, if applicable */	429	/* call feeder, if applicable */
793	grp_try_feed (grp);	430	grp_try_feed (grp);
794		431
795	/* finish, if done */	432	/* finish, if done */
796	if (!grp->size && grp->int1)	433	if (!grp->size && grp->flags & ETP_FLAG_DELAYED)
797	return eio_finish (grp);	434	return eio_finish (grp);
798	else	435	else
799	return 0;	436	return 0;
800	}	437	}
801		438
…		…
837	}	474	}
838		475
839	void	476	void
840	eio_grp_cancel (eio_req *grp)	477	eio_grp_cancel (eio_req *grp)
841	{	478	{
842	for (grp = grp->grp_first; grp; grp = grp->grp_next)	479	etp_grp_cancel (EIO_POOL, grp);
843	eio_cancel (grp);
844	}	480	}
845		481
846	void	482	void
847	eio_cancel (eio_req *req)	483	eio_cancel (eio_req *req)
848	{	484	{
849	etp_cancel (req);	485	etp_cancel (EIO_POOL, req);
850	}	486	}
851		487
852	void	488	void
853	eio_submit (eio_req *req)	489	eio_submit (eio_req *req)
854	{	490	{
855	etp_submit (req);	491	etp_submit (EIO_POOL, req);
856	}	492	}
857		493
858	unsigned int	494	unsigned int
859	eio_nreqs (void)	495	eio_nreqs (void)
860	{	496	{
861	return etp_nreqs ();	497	return etp_nreqs (EIO_POOL);
862	}	498	}
863		499
864	unsigned int	500	unsigned int
865	eio_nready (void)	501	eio_nready (void)
866	{	502	{
867	return etp_nready ();	503	return etp_nready (EIO_POOL);
868	}	504	}
869		505
870	unsigned int	506	unsigned int
871	eio_npending (void)	507	eio_npending (void)
872	{	508	{
873	return etp_npending ();	509	return etp_npending (EIO_POOL);
874	}	510	}
875		511
876	unsigned int ecb_cold	512	unsigned int ecb_cold
877	eio_nthreads (void)	513	eio_nthreads (void)
878	{	514	{
879	return etp_nthreads ();	515	return etp_nthreads (EIO_POOL);
880	}	516	}
881		517
882	void ecb_cold	518	void ecb_cold
883	eio_set_max_poll_time (double nseconds)	519	eio_set_max_poll_time (double nseconds)
884	{	520	{
885	etp_set_max_poll_time (nseconds);	521	etp_set_max_poll_time (EIO_POOL, nseconds);
886	}	522	}
887		523
888	void ecb_cold	524	void ecb_cold
889	eio_set_max_poll_reqs (unsigned int maxreqs)	525	eio_set_max_poll_reqs (unsigned int maxreqs)
890	{	526	{
891	etp_set_max_poll_reqs (maxreqs);	527	etp_set_max_poll_reqs (EIO_POOL, maxreqs);
892	}	528	}
893		529
894	void ecb_cold	530	void ecb_cold
895	eio_set_max_idle (unsigned int nthreads)	531	eio_set_max_idle (unsigned int nthreads)
896	{	532	{
897	etp_set_max_idle (nthreads);	533	etp_set_max_idle (EIO_POOL, nthreads);
898	}	534	}
899		535
900	void ecb_cold	536	void ecb_cold
901	eio_set_idle_timeout (unsigned int seconds)	537	eio_set_idle_timeout (unsigned int seconds)
902	{	538	{
903	etp_set_idle_timeout (seconds);	539	etp_set_idle_timeout (EIO_POOL, seconds);
904	}	540	}
905		541
906	void ecb_cold	542	void ecb_cold
907	eio_set_min_parallel (unsigned int nthreads)	543	eio_set_min_parallel (unsigned int nthreads)
908	{	544	{
909	etp_set_min_parallel (nthreads);	545	etp_set_min_parallel (EIO_POOL, nthreads);
910	}	546	}
911		547
912	void ecb_cold	548	void ecb_cold
913	eio_set_max_parallel (unsigned int nthreads)	549	eio_set_max_parallel (unsigned int nthreads)
914	{	550	{
915	etp_set_max_parallel (nthreads);	551	etp_set_max_parallel (EIO_POOL, nthreads);
916	}	552	}
917		553
918	int eio_poll (void)	554	int eio_poll (void)
919	{	555	{
920	return etp_poll ();	556	return etp_poll (EIO_POOL);
921	}	557	}
922		558
923	/*****************************************************************************/	559	/*****************************************************************************/
924	/* work around various missing functions */	560	/* work around various missing functions */
925		561
926	#if !HAVE_PREADWRITE	562	#if HAVE_POSIX_CLOSE && !__linux
927	# undef pread	563	# define eio__close(fd) posix_close (fd, 0)
928	# undef pwrite	564	#else
929	# define pread eio__pread	565	# define eio__close(fd) close (fd)
930	# define pwrite eio__pwrite
931
932	static eio_ssize_t
933	eio__pread (int fd, void *buf, size_t count, off_t offset)
934	{
935	eio_ssize_t res;
936	off_t ooffset;
937
938	X_LOCK (preadwritelock);
939	ooffset = lseek (fd, 0, SEEK_CUR);
940	lseek (fd, offset, SEEK_SET);
941	res = read (fd, buf, count);
942	lseek (fd, ooffset, SEEK_SET);
943	X_UNLOCK (preadwritelock);
944
945	return res;
946	}
947
948	static eio_ssize_t
949	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
950	{
951	eio_ssize_t res;
952	off_t ooffset;
953
954	X_LOCK (preadwritelock);
955	ooffset = lseek (fd, 0, SEEK_CUR);
956	lseek (fd, offset, SEEK_SET);
957	res = write (fd, buf, count);
958	lseek (fd, ooffset, SEEK_SET);
959	X_UNLOCK (preadwritelock);
960
961	return res;
962	}
963	#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	}
964		576
965	#ifndef HAVE_UTIMES	577	#ifndef HAVE_UTIMES
966		578
967	# undef utimes	579	# undef utimes
968	# define utimes(path,times) eio__utimes (path, times)	580	# define utimes(path,times) eio__utimes (path, times)
…		…
1010	int res;	622	int res;
1011		623
1012	#if HAVE_SYS_SYNCFS	624	#if HAVE_SYS_SYNCFS
1013	res = (int)syscall (__NR_syncfs, (int)(fd));	625	res = (int)syscall (__NR_syncfs, (int)(fd));
1014	#else	626	#else
1015	res = -1;	627	res = EIO_ENOSYS ();
1016	errno = ENOSYS;
1017	#endif	628	#endif
1018		629
1019	if (res < 0 && errno == ENOSYS && fd >= 0)	630	if (res < 0 && errno == ENOSYS && fd >= 0)
1020	sync ();	631	sync ();
1021		632
…		…
1051	}	662	}
1052		663
1053	static int	664	static int
1054	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)
1055	{	666	{
1056	#if HAVE_FALLOCATE	667	#if HAVE_LINUX_FALLOCATE
1057	return fallocate (fd, mode, offset, len);	668	return fallocate (fd, mode, offset, len);
1058	#else	669	#else
1059	errno = ENOSYS;	670	return EIO_ENOSYS ();
1060	return -1;
1061	#endif	671	#endif
1062	}	672	}
1063		673
1064	#if !HAVE_READAHEAD	674	#if !HAVE_READAHEAD
1065	# undef readahead	675	# undef readahead
…		…
1080	todo -= len;	690	todo -= len;
1081	}	691	}
1082		692
1083	FUBd;	693	FUBd;
1084		694
1085	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 */
1086	return count;	697	return 0;
1087	}	698	}
1088		699
1089	#endif	700	#endif
1090		701
1091	/* sendfile always needs emulation */	702	/* sendfile always needs emulation */
…		…
1126		737
1127	/* according to source inspection, this is correct, and useful behaviour */	738	/* according to source inspection, this is correct, and useful behaviour */
1128	if (sbytes)	739	if (sbytes)
1129	res = sbytes;	740	res = sbytes;
1130		741
1131	# elif defined (__APPLE__)	742	# elif defined __APPLE__
1132	off_t sbytes = count;	743	off_t sbytes = count;
1133	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);	744	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
1134		745
1135	/* according to the manpage, sbytes is always valid */	746	/* according to the manpage, sbytes is always valid */
1136	if (sbytes)	747	if (sbytes)
…		…
1163	HANDLE h = TO_SOCKET (ifd);	774	HANDLE h = TO_SOCKET (ifd);
1164	SetFilePointer (h, offset, 0, FILE_BEGIN);	775	SetFilePointer (h, offset, 0, FILE_BEGIN);
1165	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);	776	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
1166		777
1167	#else	778	#else
1168	res = -1;	779	res = EIO_ENOSYS ();
1169	errno = ENOSYS;
1170	#endif	780	#endif
1171		781
1172	/* we assume sendfile can copy at least 128mb in one go */	782	/* we assume sendfile can copy at least 128mb in one go */
1173	if (res <= 128 * 1024 * 1024)	783	if (res <= 128 * 1024 * 1024)
1174	{	784	{
…		…
1349	intptr_t end = addr + len;	959	intptr_t end = addr + len;
1350	intptr_t page = eio_pagesize ();	960	intptr_t page = eio_pagesize ();
1351		961
1352	if (addr < end)	962	if (addr < end)
1353	if (flags & EIO_MT_MODIFY) /* modify */	963	if (flags & EIO_MT_MODIFY) /* modify */
1354	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));
1355	else	965	else
1356	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));
1357	}	967	}
1358		968
1359	return 0;	969	return 0;
1360	}	970	}
1361		971
1362	/*****************************************************************************/	972	/*****************************************************************************/
1363	/* requests implemented outside eio_execute, because they are so large */	973	/* requests implemented outside eio_execute, because they are so large */
1364		974
1365	/* copies some absolute path to tmpbuf */	975	static void
1366	static char *	976	eio__lseek (eio_req *req)
1367	eio__getwd (struct tmpbuf *tmpbuf, eio_wd wd)
1368	{	977	{
1369	if (wd == EIO_CWD)	978	/* this usually gets optimised away completely, or your compiler sucks, */
1370	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;
1371		984
1372	#if HAVE_AT	985	req->offs = lseek (req->int1, req->offs, whence);
1373	abort (); /*TODO*/	986	req->result = req->offs == (off_t)-1 ? -1 : 0;
1374	#else
1375	strcpy (tmpbuf->ptr, wd);
1376	#endif
1377	return tmpbuf->ptr;
1378	}	987	}
1379		988
1380	/* 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 */
1381	static int	990	static int
1382	eio__realpath (struct tmpbuf *tmpbuf, eio_wd wd, const char *path)	991	eio__realpath (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
1383	{	992	{
		993	char *res;
1384	const char *rel = path;	994	const char *rel = path;
1385	char *res;
1386	char *tmp1, *tmp2;	995	char *tmp1, *tmp2;
1387	#if SYMLOOP_MAX > 32	996	#if SYMLOOP_MAX > 32
1388	int symlinks = SYMLOOP_MAX;	997	int symlinks = SYMLOOP_MAX;
1389	#else	998	#else
1390	int symlinks = 32;	999	int symlinks = 32;
1391	#endif	1000	#endif
1392		1001
1393	/*D*/ /*TODO: wd ignored */
1394
1395	errno = EINVAL;	1002	errno = EINVAL;
1396	if (!rel)	1003	if (!rel)
1397	return -1;	1004	return -1;
1398		1005
1399	errno = ENOENT;	1006	errno = ENOENT;
1400	if (!*rel)	1007	if (!*rel)
1401	return -1;	1008	return -1;
1402		1009
1403	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
1404	tmp1 = res + PATH_MAX;	1028	tmp1 = res + EIO_PATH_MAX;
1405	tmp2 = tmp1 + PATH_MAX;	1029	tmp2 = tmp1 + EIO_PATH_MAX;
1406		1030
1407	#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 */
1408	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)	1032	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
1409	/* on linux we may be able to ask the kernel */	1033	/* on linux we may be able to ask the kernel */
1410	{	1034	{
1411	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);
1412		1036
1413	if (fd >= 0)	1037	if (fd >= 0)
1414	{	1038	{
1415	sprintf (tmp1, "/proc/self/fd/%d", fd);	1039	sprintf (tmp1, "/proc/self/fd/%d", fd);
1416	req->result = readlink (tmp1, res, PATH_MAX);	1040	req->result = readlink (tmp1, res, EIO_PATH_MAX);
1417	close (fd);
1418
1419	/* 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);
1420		1043
1421	if (req->result > 0)	1044	if (req->result > 0)
1422	goto done;	1045	goto done;
1423	}	1046	}
1424	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)
1425	return;	1048	return -1;
1426	}	1049	}
1427	#endif	1050	#endif
1428	#endif	1051	#endif
1429		1052
1430	if (*rel != '/')	1053	if (*rel != '/')
1431	{	1054	{
1432	if (!eio__getwd (tmpbuf, wd))	1055	int len;
		1056
		1057	errno = ENOENT;
		1058	if (wd == EIO_INVALID_WD)
1433	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);
1434		1070
1435	if (res [1]) /* only use if not / */	1071	if (res [1]) /* only use if not / */
1436	res += strlen (res);	1072	res += len;
1437	}	1073	}
1438		1074
1439	while (*rel)	1075	while (*rel)
1440	{	1076	{
1441	eio_ssize_t len, linklen;	1077	eio_ssize_t len, linklen;
…		…
1469	}	1105	}
1470	}	1106	}
1471		1107
1472	errno = ENAMETOOLONG;	1108	errno = ENAMETOOLONG;
1473	if (res + 1 + len + 1 >= tmp1)	1109	if (res + 1 + len + 1 >= tmp1)
1474	return;	1110	return -1;
1475		1111
1476	/* copy one component */	1112	/* copy one component */
1477	*res = '/';	1113	*res = '/';
1478	memcpy (res + 1, beg, len);	1114	memcpy (res + 1, beg, len);
1479		1115
1480	/* zero-terminate, for readlink */	1116	/* zero-terminate, for readlink */
1481	res [len + 1] = 0;	1117	res [len + 1] = 0;
1482		1118
1483	/* now check if it's a symlink */	1119	/* now check if it's a symlink */
1484	linklen = readlink (tmpbuf->ptr, tmp1, PATH_MAX);	1120	linklen = readlink (tmpbuf->ptr, tmp1, EIO_PATH_MAX);
1485		1121
1486	if (linklen < 0)	1122	if (linklen < 0)
1487	{	1123	{
1488	if (errno != EINVAL)	1124	if (errno != EINVAL)
1489	return -1;	1125	return -1;
…		…
1495	{	1131	{
1496	/* yay, it was a symlink - build new path in tmp2 */	1132	/* yay, it was a symlink - build new path in tmp2 */
1497	int rellen = strlen (rel);	1133	int rellen = strlen (rel);
1498		1134
1499	errno = ENAMETOOLONG;	1135	errno = ENAMETOOLONG;
1500	if (linklen + 1 + rellen >= PATH_MAX)	1136	if (linklen + 1 + rellen >= EIO_PATH_MAX) /* also catch linklen >= EIO_PATH_MAX */
1501	return -1;	1137	return -1;
1502		1138
1503	errno = ELOOP;	1139	errno = ELOOP;
1504	if (!--symlinks)	1140	if (!--symlinks)
1505	return -1;	1141	return -1;
…		…
1519	/* special case for the lone root path */	1155	/* special case for the lone root path */
1520	if (res == tmpbuf->ptr)	1156	if (res == tmpbuf->ptr)
1521	*res++ = '/';	1157	*res++ = '/';
1522		1158
1523	return res - (char *)tmpbuf->ptr;	1159	return res - (char *)tmpbuf->ptr;
		1160	#endif
1524	}	1161	}
1525		1162
1526	static signed char	1163	static signed char
1527	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)	1164	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
1528	{	1165	{
…		…
1688	eio_dent_insertion_sort (dents, size);	1325	eio_dent_insertion_sort (dents, size);
1689	}	1326	}
1690		1327
1691	/* read a full directory */	1328	/* read a full directory */
1692	static void	1329	static void
1693	eio__scandir (eio_req *req)	1330	eio__scandir (eio_req *req, etp_worker *self)
1694	{	1331	{
1695	char *name, *names;	1332	char *name, *names;
1696	int namesalloc = 4096 - sizeof (void *) * 4;	1333	int namesalloc = 4096 - sizeof (void *) * 4;
1697	int namesoffs = 0;	1334	int namesoffs = 0;
1698	int flags = req->int1;	1335	int flags = req->int1;
…		…
1716	#ifdef _WIN32	1353	#ifdef _WIN32
1717	{	1354	{
1718	int len = strlen ((const char *)req->ptr1);	1355	int len = strlen ((const char *)req->ptr1);
1719	char *path = malloc (MAX_PATH);	1356	char *path = malloc (MAX_PATH);
1720	const char *fmt;	1357	const char *fmt;
		1358	const char *reqpath = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
1721		1359
1722	if (!len)	1360	if (!len)
1723	fmt = "./*";	1361	fmt = "./*";
1724	else if (((const char *)req->ptr1)[len - 1] == '/' || ((const char *)req->ptr1)[len - 1] == '\\')	1362	else if (reqpath[len - 1] == '/' || reqpath[len - 1] == '\\')
1725	fmt = "%s*";	1363	fmt = "%s*";
1726	else	1364	else
1727	fmt = "%s/*";	1365	fmt = "%s/*";
1728		1366
1729	_snprintf (path, MAX_PATH, fmt, (const char *)req->ptr1);	1367	_snprintf (path, MAX_PATH, fmt, reqpath);
1730	dirp = FindFirstFile (path, &entp);	1368	dirp = FindFirstFile (path, &entp);
1731	free (path);	1369	free (path);
1732		1370
1733	if (dirp == INVALID_HANDLE_VALUE)	1371	if (dirp == INVALID_HANDLE_VALUE)
1734	{	1372	{
…		…
1756		1394
1757	return;	1395	return;
1758	}	1396	}
1759	}	1397	}
1760	#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
1761	dirp = opendir (req->ptr1);	1413	dirp = opendir (req->ptr1);
		1414	#else
		1415	dirp = opendir (wd_expand (&self->tmpbuf, req->wd, req->ptr1));
		1416	#endif
1762		1417
1763	if (!dirp)	1418	if (!dirp)
1764	return;	1419	return;
1765	#endif	1420	#endif
1766		1421
…		…
1883	#ifdef DT_FIFO	1538	#ifdef DT_FIFO
1884	case DT_FIFO: ent->type = EIO_DT_FIFO; break;	1539	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
1885	#endif	1540	#endif
1886	#ifdef DT_CHR	1541	#ifdef DT_CHR
1887	case DT_CHR: ent->type = EIO_DT_CHR; break;	1542	case DT_CHR: ent->type = EIO_DT_CHR; break;
1888	#endif	1543	#endif
1889	#ifdef DT_MPC	1544	#ifdef DT_MPC
1890	case DT_MPC: ent->type = EIO_DT_MPC; break;	1545	case DT_MPC: ent->type = EIO_DT_MPC; break;
1891	#endif	1546	#endif
1892	#ifdef DT_DIR	1547	#ifdef DT_DIR
1893	case DT_DIR: ent->type = EIO_DT_DIR; break;	1548	case DT_DIR: ent->type = EIO_DT_DIR; break;
1894	#endif	1549	#endif
1895	#ifdef DT_NAM	1550	#ifdef DT_NAM
1896	case DT_NAM: ent->type = EIO_DT_NAM; break;	1551	case DT_NAM: ent->type = EIO_DT_NAM; break;
1897	#endif	1552	#endif
1898	#ifdef DT_BLK	1553	#ifdef DT_BLK
1899	case DT_BLK: ent->type = EIO_DT_BLK; break;	1554	case DT_BLK: ent->type = EIO_DT_BLK; break;
1900	#endif	1555	#endif
1901	#ifdef DT_MPB	1556	#ifdef DT_MPB
1902	case DT_MPB: ent->type = EIO_DT_MPB; break;	1557	case DT_MPB: ent->type = EIO_DT_MPB; break;
1903	#endif	1558	#endif
1904	#ifdef DT_REG	1559	#ifdef DT_REG
1905	case DT_REG: ent->type = EIO_DT_REG; break;	1560	case DT_REG: ent->type = EIO_DT_REG; break;
1906	#endif	1561	#endif
1907	#ifdef DT_NWK	1562	#ifdef DT_NWK
1908	case DT_NWK: ent->type = EIO_DT_NWK; break;	1563	case DT_NWK: ent->type = EIO_DT_NWK; break;
1909	#endif	1564	#endif
1910	#ifdef DT_CMP	1565	#ifdef DT_CMP
1911	case DT_CMP: ent->type = EIO_DT_CMP; break;	1566	case DT_CMP: ent->type = EIO_DT_CMP; break;
1912	#endif	1567	#endif
1913	#ifdef DT_LNK	1568	#ifdef DT_LNK
1914	case DT_LNK: ent->type = EIO_DT_LNK; break;	1569	case DT_LNK: ent->type = EIO_DT_LNK; break;
1915	#endif	1570	#endif
1916	#ifdef DT_SOCK	1571	#ifdef DT_SOCK
1917	case DT_SOCK: ent->type = EIO_DT_SOCK; break;	1572	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
…		…
1930	{	1585	{
1931	if (ent->type == EIO_DT_UNKNOWN)	1586	if (ent->type == EIO_DT_UNKNOWN)
1932	{	1587	{
1933	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 */
1934	ent->score = 1;	1589	ent->score = 1;
1935	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */	1590	else if (!strchr (name, '.')) /* absence of dots indicate likely dirs */
1936	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 */
1937	}	1592	}
1938	else if (ent->type == EIO_DT_DIR)	1593	else if (ent->type == EIO_DT_DIR)
1939	ent->score = 0;	1594	ent->score = 0;
1940	}	1595	}
…		…
1960	}	1615	}
1961	}	1616	}
1962		1617
1963	/*****************************************************************************/	1618	/*****************************************************************************/
1964	/* 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;
1965		1662
1966	#if HAVE_AT	1663	#if HAVE_AT
		1664	fd = openat (WD2FD (wd), path, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
1967		1665
1968	#define WD2FD(wd) (wd ? ((int)wd) - 1 : AT_FDCWD)	1666	if (fd < 0)
		1667	return EIO_INVALID_WD;
		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	}
1969		1682
1970	eio_wd	1683	eio_wd
1971	eio_wd_open_sync (eio_wd wd, const char *path)	1684	eio_wd_open_sync (eio_wd wd, const char *path)
1972	{	1685	{
1973	int fd = openat (WD2FD (wd), path, O_CLOEXEC | O_SEARCH | O_DIRECTORY);	1686	struct etp_tmpbuf tmpbuf = { };
		1687	wd = eio__wd_open_sync (&tmpbuf, wd, path);
		1688	free (tmpbuf.ptr);
1974		1689
1975	return fd >= 0 ? (eio_wd)(fd + 1) : EIO_INVALID_WD;	1690	return wd;
1976	}	1691	}
1977		1692
1978	void	1693	void
1979	eio_wd_close_sync (eio_wd wd)	1694	eio_wd_close_sync (eio_wd wd)
1980	{	1695	{
1981	int fd = WD2FD (wd);	1696	if (wd != EIO_INVALID_WD && wd != EIO_CWD)
1982		1697	{
1983	if (fd >= 0)	1698	#if HAVE_AT
1984	close (fd);	1699	eio__close (wd->fd);
		1700	#endif
		1701	free (wd);
		1702	}
1985	}	1703	}
1986		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);
1987	#else	1712	#else
		1713	if (flags)
		1714	return EIO_ENOSYS ();
1988		1715
1989	/* on legacy systems, we represent the working directories simply by their path strings */	1716	return renameat (olddirfd, oldpath, newdirfd, newpath);
1990		1717	#endif
1991	static const char *
1992	wd_expand (struct tmpbuf *tmpbuf, eio_wd wd, const char *path)
1993	{
1994	if (!wd || *path == '/')
1995	return path;
1996
1997	{
1998	int l1 = strlen ((const char *)wd);
1999	int l2 = strlen (path);
2000
2001	char *res = tmpbuf_get (tmpbuf, l1 + l2 + 2);
2002
2003	memcpy (res, wd, l1);
2004	res [l1] = '/';
2005	memcpy (res + l1 + 1, path, l2 + 1);
2006
2007	return res;
2008	}
2009	}	1718	}
2010		1719
2011	eio_wd	1720	/* they forgot these */
2012	eio__wd_open_sync (struct tmpbuf *tmpbuf, eio_wd wd, const char *path)	1721
		1722	static int
		1723	eio__truncateat (int dirfd, const char *path, off_t length)
2013	{	1724	{
2014	if (*path == '/') /* absolute paths ignore wd */	1725	int fd = openat (dirfd, path, O_WRONLY | O_CLOEXEC);
2015	path = strdup (path);	1726	int res;
2016	else if (path [0] == '.' && !path [1]) /* special case '.', as it is common */	1727
		1728	if (fd < 0)
2017	return wd;	1729	return fd;
2018	else
2019	{
2020	int len = eio__realpath (tmpbuf, wd, path);
2021		1730
2022	path = EIO_INVALID_WD;	1731	res = ftruncate (fd, length);
2023		1732	silent_close (fd);
2024	if (len >= 0)	1733	return res;
2025	{
2026	((char *)tmpbuf->ptr)[len] = 0;
2027	path = strdup (tmpbuf->ptr);
2028	}
2029	}
2030
2031	if (!path)
2032	path = EIO_INVALID_WD;
2033
2034	return (eio_wd)path;
2035	}	1734	}
2036		1735
2037	eio_wd	1736	static int
2038	eio_wd_open_sync (eio_wd wd, const char *path)	1737	eio__statvfsat (int dirfd, const char *path, struct statvfs *buf)
2039	{	1738	{
2040	struct tmpbuf tmpbuf = { 0 };	1739	int fd = openat (dirfd, path, O_SEARCH | O_CLOEXEC);
2041	wd = eio__wd_open_sync (&tmpbuf, wd, path);	1740	int res;
2042	free (tmpbuf.ptr);
2043		1741
		1742	if (fd < 0)
2044	return wd;	1743	return fd;
2045	}
2046		1744
2047	void	1745	res = fstatvfs (fd, buf);
2048	eio_wd_close_sync (eio_wd wd)	1746	silent_close (fd);
2049	{	1747	return res;
2050	if (wd != EIO_INVALID_WD)
2051	free (wd);
2052	}	1748	}
2053		1749
2054	#endif	1750	#endif
2055		1751
2056	/*****************************************************************************/	1752	/*****************************************************************************/
2057		1753
2058	#define ALLOC(len) \	1754	#define ALLOC(len) \
2059	if (!req->ptr2) \	1755	if (!req->ptr2) \
2060	{ \	1756	{ \
2061	X_LOCK (wrklock); \	1757	X_LOCK (EIO_POOL->wrklock); \
2062	req->flags |= EIO_FLAG_PTR2_FREE; \	1758	req->flags |= EIO_FLAG_PTR2_FREE; \
2063	X_UNLOCK (wrklock); \	1759	X_UNLOCK (EIO_POOL->wrklock); \
2064	req->ptr2 = malloc (len); \	1760	req->ptr2 = malloc (len); \
2065	if (!req->ptr2) \	1761	if (!req->ptr2) \
2066	{ \	1762	{ \
2067	errno = ENOMEM; \	1763	errno = ENOMEM; \
2068	req->result = -1; \	1764	req->result = -1; \
2069	break; \	1765	goto alloc_fail; \
2070	} \	1766	} \
2071	}	1767	}
2072		1768
2073	X_THREAD_PROC (etp_proc)	1769	/*****************************************************************************/
2074	{
2075	ETP_REQ *req;
2076	struct timespec ts;
2077	etp_worker *self = (etp_worker *)thr_arg;
2078		1770
2079	#if HAVE_PRCTL_SET_NAME	1771	static void
2080	prctl (PR_SET_NAME, (unsigned long)"eio_thread", 0, 0, 0);	1772	eio__slurp (int fd, eio_req *req)
2081	#endif	1773	{
		1774	req->result = fd;
2082		1775
2083	/* try to distribute timeouts somewhat evenly */	1776	if (fd < 0)
2084	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1777	return;
2085		1778
2086	for (;;)	1779	if (req->offs < 0 || !req->size) /* do we need the size? */
2087	{	1780	{
2088	ts.tv_sec = 0;	1781	off_t size = lseek (fd, 0, SEEK_END);
2089		1782
2090	X_LOCK (reqlock);
2091
2092	for (;;)
2093	{
2094	req = reqq_shift (&req_queue);
2095
2096	if (req)
2097	break;
2098
2099	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
2100	{
2101	X_UNLOCK (reqlock);
2102	X_LOCK (wrklock);
2103	--started;
2104	X_UNLOCK (wrklock);
2105	goto quit;
2106	}
2107
2108	++idle;
2109
2110	if (idle <= max_idle)
2111	/* we are allowed to idle, so do so without any timeout */
2112	X_COND_WAIT (reqwait, reqlock);
2113	else
2114	{
2115	/* initialise timeout once */
2116	if (!ts.tv_sec)
2117	ts.tv_sec = time (0) + idle_timeout;
2118
2119	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
2120	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
2121	}
2122
2123	--idle;
2124	}
2125
2126	--nready;
2127
2128	X_UNLOCK (reqlock);
2129
2130	if (req->type < 0)	1783	if (req->offs < 0)
2131	goto quit;	1784	req->offs += size;
2132		1785
2133	ETP_EXECUTE (self, req);	1786	if (!req->size)
2134		1787	req->size = size - req->offs;
2135	X_LOCK (reslock);
2136
2137	++npending;
2138
2139	if (!reqq_push (&res_queue, req) && want_poll_cb)
2140	want_poll_cb ();
2141
2142	etp_worker_clear (self);
2143
2144	X_UNLOCK (reslock);
2145	}	1788	}
2146		1789
2147	quit:	1790	ALLOC (req->size);
2148	free (req);	1791	req->result = pread (fd, req->ptr2, req->size, req->offs);
2149		1792
2150	X_LOCK (wrklock);	1793	silent_close (fd);
2151	etp_worker_free (self);
2152	X_UNLOCK (wrklock);
2153		1794
2154	return 0;	1795	alloc_fail:
		1796	;
2155	}	1797	}
2156
2157	/*****************************************************************************/
2158		1798
2159	int ecb_cold	1799	int ecb_cold
2160	eio_init (void (*want_poll)(void), void (*done_poll)(void))	1800	eio_init (void (*want_poll)(void), void (*done_poll)(void))
2161	{	1801	{
2162	#if !HAVE_PREADWRITE	1802	eio_want_poll_cb = want_poll;
2163	X_MUTEX_CREATE (preadwritelock);	1803	eio_done_poll_cb = done_poll;
2164	#endif
2165		1804
2166	return etp_init (want_poll, done_poll);	1805	return etp_init (EIO_POOL, 0, 0, 0);
2167	}	1806	}
2168		1807
2169	ecb_inline void	1808	ecb_inline void
2170	eio_api_destroy (eio_req *req)	1809	eio_api_destroy (eio_req *req)
2171	{	1810	{
2172	free (req);	1811	free (req);
2173	}	1812	}
2174		1813
2175	#define REQ(rtype) \	1814	#define REQ(rtype) \
2176	eio_req *req; \	1815	eio_req *req; \
2177	\	1816	\
2178	req = (eio_req *)calloc (1, sizeof *req); \	1817	req = (eio_req *)calloc (1, sizeof *req); \
2179	if (!req) \	1818	if (!req) \
2180	return 0; \	1819	return 0; \
…		…
2194	{ \	1833	{ \
2195	eio_api_destroy (req); \	1834	eio_api_destroy (req); \
2196	return 0; \	1835	return 0; \
2197	}	1836	}
2198		1837
		1838	#define SINGLEDOT(ptr) (0[(char *)(ptr)] == '.' && !1[(char *)(ptr)])
		1839
2199	static void	1840	static void
2200	eio_execute (etp_worker *self, eio_req *req)	1841	eio_execute (etp_worker *self, eio_req *req)
2201	{	1842	{
2202	#if HAVE_AT	1843	#if HAVE_AT
2203	int dirfd;	1844	int dirfd;
…		…
2231	switch (req->type)	1872	switch (req->type)
2232	{	1873	{
2233	case EIO_WD_OPEN: req->wd = eio__wd_open_sync (&self->tmpbuf, req->wd, req->ptr1);	1874	case EIO_WD_OPEN: req->wd = eio__wd_open_sync (&self->tmpbuf, req->wd, req->ptr1);
2234	req->result = req->wd == EIO_INVALID_WD ? -1 : 0;	1875	req->result = req->wd == EIO_INVALID_WD ? -1 : 0;
2235	break;	1876	break;
		1877	case EIO_WD_CLOSE: req->result = 0;
		1878	eio_wd_close_sync (req->wd); break;
		1879
2236	case EIO_WD_CLOSE: eio_wd_close_sync (req->wd); break;	1880	case EIO_SEEK: eio__lseek (req); break;
2237
2238	case EIO_READ: ALLOC (req->size);	1881	case EIO_READ: ALLOC (req->size);
2239	req->result = req->offs >= 0	1882	req->result = req->offs >= 0
2240	? pread (req->int1, req->ptr2, req->size, req->offs)	1883	? pread (req->int1, req->ptr2, req->size, req->offs)
2241	: read (req->int1, req->ptr2, req->size); break;	1884	: read (req->int1, req->ptr2, req->size); break;
2242	case EIO_WRITE: req->result = req->offs >= 0	1885	case EIO_WRITE: req->result = req->offs >= 0
2243	? pwrite (req->int1, req->ptr2, req->size, req->offs)	1886	? pwrite (req->int1, req->ptr2, req->size, req->offs)
2244	: write (req->int1, req->ptr2, req->size); break;	1887	: write (req->int1, req->ptr2, req->size); break;
2245		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;
		1891
2246	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;
2247	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;
2248		1894
2249	#if HAVE_AT	1895	#if HAVE_AT
2250	case EIO_GETPATH: abort ();	1896
2251	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1897	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2252	req->result = fstatat (dirfd, path, (EIO_STRUCT_STAT *)req->ptr2); break;	1898	req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, 0); break;
2253	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1899	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2254	req->result = lstat (dirfd, path, (EIO_STRUCT_STAT *)req->ptr2); break;	1900	req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, AT_SYMLINK_NOFOLLOW); break;
2255	#if 0/*D*/	1901	case EIO_CHOWN: req->result = fchownat (dirfd, req->ptr1, req->int2, req->int3, 0); break;
		1902	case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break;
		1903	case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); 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;
		1906
		1907	case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); 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;
		1912	case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); 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;
		1922	case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break;
		1923	case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break;
		1924	case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
2256	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));	1925	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2257	req->result = statvfs (dirfd, path, (EIO_STRUCT_STATVFS *)req->ptr2); break;	1926	req->result = eio__statvfsat (dirfd, req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
2258	#endif	1927	case EIO_READLINK: ALLOC (EIO_PATH_MAX);
2259	case EIO_CHOWN: req->result = chown (dirfd, path, req->int2, req->int3); break;	1928	req->result = readlinkat (dirfd, req->ptr1, req->ptr2, EIO_PATH_MAX);
2260	case EIO_CHMOD: req->result = chmod (dirfd, path, (mode_t)req->int2); break;	1929	if (req->result == EIO_PATH_MAX)
2261	case EIO_TRUNCATE: req->result = truncate (dirfd, path, req->offs); break;	1930	{
2262	case EIO_OPEN: req->result = open (dirfd, path, req->int1, (mode_t)req->int2); break;	1931	req->result = -1;
		1932	errno = ENAMETOOLONG;
		1933	}
		1934	break;
		1935	case EIO_UTIME:
		1936	case EIO_FUTIME:
		1937	{
		1938	struct timespec ts[2];
		1939	struct timespec *times;
2263		1940
2264	case EIO_UNLINK: req->result = unlink (dirfd, path); break;	1941	if (req->nv1 != -1. || req->nv2 != -1.)
2265	case EIO_RMDIR: req->result = rmdir (dirfd, path); break;	1942	{
2266	case EIO_MKDIR: req->result = mkdir (dirfd, path, (mode_t)req->int2); break;	1943	ts[0].tv_sec = req->nv1;
2267	case EIO_RENAME: req->result = rename (dirfd, path, req->ptr2); break;	1944	ts[0].tv_nsec = (req->nv1 - ts[0].tv_sec) * 1e9;
2268	case EIO_LINK: req->result = link (dirfd, path, req->ptr2); break;	1945	ts[1].tv_sec = req->nv2;
2269	case EIO_SYMLINK: req->result = symlink (dirfd, path, req->ptr2); break;	1946	ts[1].tv_nsec = (req->nv2 - ts[1].tv_sec) * 1e9;
2270	case EIO_MKNOD: req->result = mknod (dirfd, path, (mode_t)req->int2, (dev_t)req->offs); break;	1947
		1948	times = ts;
		1949	}
		1950	else
		1951	times = 0;
		1952
		1953	req->result = req->type == EIO_FUTIME
		1954	? futimens (req->int1, times)
		1955	: utimensat (dirfd, req->ptr1, times, 0);
		1956	}
		1957	break;
		1958
2271	#else	1959	#else
		1960
2272	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1961	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2273	req->result = stat (path , (EIO_STRUCT_STAT *)req->ptr2); break;	1962	req->result = stat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
2274	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1963	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2275	req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break;	1964	req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
2276	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;
2277	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;
2278	case EIO_TRUNCATE: req->result = truncate (path , req->offs); break;	1967	case EIO_TRUNCATE: req->result = truncate (path , req->offs); break;
2279	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;
2280		1970
2281	case EIO_UNLINK: req->result = unlink (path ); break;	1971	case EIO_UNLINK: req->result = unlink (path ); break;
2282	case EIO_RMDIR: req->result = rmdir (path ); break;	1972	case EIO_RMDIR: req->result = rmdir (path ); break;
2283	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;
2284	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;
2285	case EIO_LINK: req->result = link (path , req->ptr2); break;	1975	case EIO_LINK: req->result = link (path , req->ptr2); break;
2286	case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break;	1976	case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break;
2287	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;
2288		1978	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		1979	req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break;
2289	case EIO_READLINK: ALLOC (PATH_MAX);	1980	case EIO_READLINK: ALLOC (EIO_PATH_MAX);
2290	req->result = readlink (path, req->ptr2, PATH_MAX); break;	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;
		1988
		1989	case EIO_UTIME:
		1990	case EIO_FUTIME:
		1991	{
		1992	struct timeval tv[2];
		1993	struct timeval *times;
		1994
		1995	if (req->nv1 != -1. || req->nv2 != -1.)
		1996	{
		1997	tv[0].tv_sec = req->nv1;
		1998	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1e6;
		1999	tv[1].tv_sec = req->nv2;
		2000	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1e6;
		2001
		2002	times = tv;
		2003	}
		2004	else
		2005	times = 0;
		2006
		2007	req->result = req->type == EIO_FUTIME
		2008	? futimes (req->int1, times)
		2009	: utimes (req->ptr1, times);
		2010	}
		2011	break;
		2012
2291	#endif	2013	#endif
2292		2014
2293	case EIO_REALPATH: if (0 <= (req->result = eio__realpath (&self->tmpbuf, req->wd, req->ptr1)))	2015	case EIO_REALPATH: if (0 <= (req->result = eio__realpath (&self->tmpbuf, req->wd, req->ptr1)))
2294	{	2016	{
2295	ALLOC (req->result);	2017	ALLOC (req->result);
2296	memcpy (req->ptr2, self->tmpbuf.ptr, req->result);	2018	memcpy (req->ptr2, self->tmpbuf.ptr, req->result);
2297	}	2019	}
2298	break;	2020	break;
2299		2021
2300	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); /*D*/
2301	req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break;
2302
2303	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	2022	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2304	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;	2023	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
2305		2024
2306	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));	2025	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2307	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;	2026	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
2308		2027
2309	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;
2310	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;
2311	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;	2030	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
2312		2031
2313	case EIO_CLOSE: req->result = close (req->int1); break;	2032	case EIO_CLOSE: req->result = eio__close (req->int1); break;
2314	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;	2033	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
2315	case EIO_SYNC: req->result = 0; sync (); break;	2034	case EIO_SYNC: req->result = 0; sync (); break;
2316	case EIO_FSYNC: req->result = fsync (req->int1); break;	2035	case EIO_FSYNC: req->result = fsync (req->int1); break;
2317	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;	2036	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
2318	case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break;	2037	case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break;
…		…
2321	case EIO_MTOUCH: req->result = eio__mtouch (req); break;	2040	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
2322	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;
2323	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;	2042	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
2324	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;
2325		2044
2326	case EIO_READDIR: eio__scandir (req); break;	2045	case EIO_READDIR: eio__scandir (req, self); break;
2327		2046
2328	case EIO_BUSY:	2047	case EIO_BUSY:
2329	#ifdef _WIN32	2048	#ifdef _WIN32
2330	Sleep (req->nv1 * 1e3);	2049	Sleep (req->nv1 * 1e3);
2331	#else	2050	#else
…		…
2338	req->result = select (0, 0, 0, 0, &tv);	2057	req->result = select (0, 0, 0, 0, &tv);
2339	}	2058	}
2340	#endif	2059	#endif
2341	break;	2060	break;
2342		2061
2343	case EIO_UTIME:	2062	#if 0
2344	case EIO_FUTIME:
2345	{
2346	struct timeval tv[2];
2347	struct timeval *times;
2348
2349	if (req->nv1 != -1. || req->nv2 != -1.)
2350	{
2351	tv[0].tv_sec = req->nv1;
2352	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
2353	tv[1].tv_sec = req->nv2;
2354	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
2355
2356	times = tv;
2357	}
2358	else
2359	times = 0;
2360
2361	req->result = req->type == EIO_FUTIME
2362	? futimes (req->int1, times)
2363	: utimes (req->ptr1, times);
2364	}
2365	break;
2366
2367	case EIO_GROUP:	2063	case EIO_GROUP:
2368	abort (); /* handled in eio_request */	2064	abort (); /* handled in eio_request */
		2065	#endif
2369		2066
2370	case EIO_NOP:	2067	case EIO_NOP:
2371	req->result = 0;	2068	req->result = 0;
2372	break;	2069	break;
2373		2070
2374	case EIO_CUSTOM:	2071	case EIO_CUSTOM:
2375	req->feed (req);	2072	req->feed (req);
2376	break;	2073	break;
2377		2074
2378	default:	2075	default:
2379	errno = ENOSYS;
2380	req->result = -1;	2076	req->result = EIO_ENOSYS ();
2381	break;	2077	break;
2382	}	2078	}
2383		2079
		2080	alloc_fail:
2384	req->errorno = errno;	2081	req->errorno = errno;
2385	}	2082	}
2386		2083
2387	#ifndef EIO_NO_WRAPPERS	2084	#ifndef EIO_NO_WRAPPERS
2388		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
2389	eio_req *eio_nop (int pri, eio_cb cb, void *data)	2096	eio_req *eio_nop (int pri, eio_cb cb, void *data)
2390	{	2097	{
2391	REQ (EIO_NOP); SEND;	2098	REQ (EIO_NOP); SEND;
2392	}	2099	}
2393		2100
…		…
2454	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)
2455	{	2162	{
2456	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;
2457	}	2164	}
2458		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
2459	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)
2460	{	2172	{
2461	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;
2462	}	2174	}
2463		2175
2464	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)
2465	{	2177	{
2466	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;
2467	}	2189	}
2468		2190
2469	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)
2470	{	2192	{
2471	REQ (EIO_FSTAT); req->int1 = fd; SEND;	2193	REQ (EIO_FSTAT); req->int1 = fd; SEND;
…		…
2616	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)
2617	{	2339	{
2618	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);	2340	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
2619	}	2341	}
2620		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
2621	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)
2622	{	2349	{
2623	REQ (EIO_CUSTOM); req->feed = execute; SEND;	2350	REQ (EIO_CUSTOM); req->feed = execute; SEND;
2624	}	2351	}
2625		2352
…		…
2659	void	2386	void
2660	eio_grp_add (eio_req *grp, eio_req *req)	2387	eio_grp_add (eio_req *grp, eio_req *req)
2661	{	2388	{
2662	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));
2663		2390
2664	grp->flags |= EIO_FLAG_GROUPADD;	2391	grp->flags |= ETP_FLAG_GROUPADD;
2665		2392
2666	++grp->size;	2393	++grp->size;
2667	req->grp = grp;	2394	req->grp = grp;
2668		2395
2669	req->grp_prev = 0;	2396	req->grp_prev = 0;

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