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Comparing libeio/eio.c (file contents):
Revision 1.102 by root, Sun Aug 21 01:03:09 2011 UTC vs.
Revision 1.139 by root, Thu Jun 25 18:14:19 2015 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 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,
…		…
120	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))	120	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
121		121
122	#define chmod(path,mode) _chmod (path, mode)	122	#define chmod(path,mode) _chmod (path, mode)
123	#define dup(fd) _dup (fd)	123	#define dup(fd) _dup (fd)
124	#define dup2(fd1,fd2) _dup2 (fd1, fd2)	124	#define dup2(fd1,fd2) _dup2 (fd1, fd2)
		125	#define pipe(fds) _pipe (fds, 4096, O_BINARY)
125		126
126	#define fchmod(fd,mode) EIO_ENOSYS ()	127	#define fchmod(fd,mode) EIO_ENOSYS ()
127	#define chown(path,uid,gid) EIO_ENOSYS ()	128	#define chown(path,uid,gid) EIO_ENOSYS ()
128	#define fchown(fd,uid,gid) EIO_ENOSYS ()	129	#define fchown(fd,uid,gid) EIO_ENOSYS ()
129	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */	130	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
…		…
131	#define mknod(path,mode,dev) EIO_ENOSYS ()	132	#define mknod(path,mode,dev) EIO_ENOSYS ()
132	#define sync() EIO_ENOSYS ()	133	#define sync() EIO_ENOSYS ()
133	#define readlink(path,buf,s) EIO_ENOSYS ()	134	#define readlink(path,buf,s) EIO_ENOSYS ()
134	#define statvfs(path,buf) EIO_ENOSYS ()	135	#define statvfs(path,buf) EIO_ENOSYS ()
135	#define fstatvfs(fd,buf) EIO_ENOSYS ()	136	#define fstatvfs(fd,buf) EIO_ENOSYS ()
		137
		138	#define pread(fd,buf,count,offset) eio__pread (fd, buf, count, offset)
		139	#define pwrite(fd,buf,count,offset) eio__pwrite (fd, buf, count, offset)
		140
		141	#if __GNUC__
		142	typedef long long eio_off_t; /* signed for compatibility to msvc */
		143	#else
		144	typedef __int64 eio_off_t; /* unsigned not supported by msvc */
		145	#endif
		146
		147	static eio_ssize_t
		148	eio__pread (int fd, void *buf, eio_ssize_t count, eio_off_t offset)
		149	{
		150	OVERLAPPED o = { 0 };
		151	DWORD got;
		152
		153	o.Offset = offset;
		154	o.OffsetHigh = offset >> 32;
		155
		156	return ReadFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o)
		157	? got : -1;
		158	}
		159
		160	static eio_ssize_t
		161	eio__pwrite (int fd, void *buf, eio_ssize_t count, eio_off_t offset)
		162	{
		163	OVERLAPPED o = { 0 };
		164	DWORD got;
		165
		166	o.Offset = offset;
		167	o.OffsetHigh = offset >> 32;
		168
		169	return WriteFile ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd), buf, count, &got, &o)
		170	? got : -1;
		171	}
136		172
137	/* rename() uses MoveFile, which fails to overwrite */	173	/* rename() uses MoveFile, which fails to overwrite */
138	#define rename(old,neu) eio__rename (old, neu)	174	#define rename(old,neu) eio__rename (old, neu)
139		175
140	static int	176	static int
…		…
178	#endif	214	#endif
179		215
180	return EIO_ERRNO (ENOENT, -1);	216	return EIO_ERRNO (ENOENT, -1);
181	}	217	}
182		218
183	/* POSIX API only */	219	/* POSIX API only, causing trouble for win32 apps */
184	#define CreateHardLink(neu,old,flags) 0	220	#define CreateHardLink(neu,old,flags) 0 /* not really creating hardlink, still using relative paths? */
185	#define CreateSymbolicLink(neu,old,flags) 0	221	#define CreateSymbolicLink(neu,old,flags) 0 /* vista+ only */
186		222
187	struct statvfs	223	struct statvfs
188	{	224	{
189	int dummy;	225	int dummy;
190	};	226	};
…		…
196		232
197	#else	233	#else
198		234
199	#include <sys/time.h>	235	#include <sys/time.h>
200	#include <sys/select.h>	236	#include <sys/select.h>
201	#include <sys/statvfs.h>
202	#include <unistd.h>	237	#include <unistd.h>
203	#include <signal.h>	238	#include <signal.h>
204	#include <dirent.h>	239	#include <dirent.h>
205		240
		241	#ifdef ANDROID
		242	#include <sys/vfs.h>
		243	#define statvfs statfs
		244	#define fstatvfs fstatfs
		245	#include <asm/page.h> /* supposedly limits.h does #define PAGESIZE PAGESIZE */
		246	#else
		247	#include <sys/statvfs.h>
		248	#endif
		249
206	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES	250	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
207	#include <sys/mman.h>	251	#include <sys/mman.h>
208	#endif	252	#endif
209		253
210	#define D_NAME(entp) entp->d_name	254	#define D_NAME(entp) entp->d_name
211		255
212	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */	256	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
213	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__	257	#if __FreeBSD__ || __NetBSD__ || __OpenBSD__
214	#define _DIRENT_HAVE_D_TYPE /* sigh */	258	#define _DIRENT_HAVE_D_TYPE /* sigh */
215	#define D_INO(de) (de)->d_fileno	259	#define D_INO(de) (de)->d_fileno
216	#define D_NAMLEN(de) (de)->d_namlen	260	#define D_NAMLEN(de) (de)->d_namlen
217	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600	261	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
218	#define D_INO(de) (de)->d_ino	262	#define D_INO(de) (de)->d_ino
…		…
281	#endif	325	#endif
282		326
283	/* buffer size for various temporary buffers */	327	/* buffer size for various temporary buffers */
284	#define EIO_BUFSIZE 65536	328	#define EIO_BUFSIZE 65536
285		329
286	#define dBUF \	330	#define dBUF \
287	char *eio_buf = malloc (EIO_BUFSIZE); \	331	char *eio_buf = malloc (EIO_BUFSIZE); \
288	errno = ENOMEM; \	332	errno = ENOMEM; \
289	if (!eio_buf) \	333	if (!eio_buf) \
290	return -1	334	return -1
291		335
292	#define FUBd \	336	#define FUBd \
293	free (eio_buf)	337	free (eio_buf)
294		338
295	#define EIO_TICKS ((1000000 + 1023) >> 10)	339	/*****************************************************************************/
		340
		341	struct etp_tmpbuf;
		342
		343	#if _POSIX_VERSION >= 200809L
		344	#define HAVE_AT 1
		345	#define WD2FD(wd) ((wd) ? (wd)->fd : AT_FDCWD)
		346	#ifndef O_SEARCH
		347	#define O_SEARCH O_RDONLY
		348	#endif
		349	#else
		350	#define HAVE_AT 0
		351	static const char *wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path);
		352	#endif
		353
		354	struct eio_pwd
		355	{
		356	#if HAVE_AT
		357	int fd;
		358	#endif
		359	int len;
		360	char str[1]; /* actually, a 0-terminated canonical path */
		361	};
		362
		363	/*****************************************************************************/
296		364
297	#define ETP_PRI_MIN EIO_PRI_MIN	365	#define ETP_PRI_MIN EIO_PRI_MIN
298	#define ETP_PRI_MAX EIO_PRI_MAX	366	#define ETP_PRI_MAX EIO_PRI_MAX
299		367
		368	#define ETP_TYPE_QUIT -1
		369	#define ETP_TYPE_GROUP EIO_GROUP
		370
		371	static void eio_nop_callback (void) { }
		372	static void (*eio_want_poll_cb)(void) = eio_nop_callback;
		373	static void (*eio_done_poll_cb)(void) = eio_nop_callback;
		374
		375	#define ETP_WANT_POLL(pool) eio_want_poll_cb ()
		376	#define ETP_DONE_POLL(pool) eio_done_poll_cb ()
		377
300	struct etp_worker;	378	struct etp_worker;
301
302	#define ETP_REQ eio_req	379	#define ETP_REQ eio_req
303	#define ETP_DESTROY(req) eio_destroy (req)	380	#define ETP_DESTROY(req) eio_destroy (req)
304	static int eio_finish (eio_req *req);	381	static int eio_finish (eio_req *req);
305	#define ETP_FINISH(req) eio_finish (req)	382	#define ETP_FINISH(req) eio_finish (req)
306	static void eio_execute (struct etp_worker *self, eio_req *req);	383	static void eio_execute (struct etp_worker *self, eio_req *req);
307	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)	384	#define ETP_EXECUTE(wrk,req) eio_execute (wrk, req)
308		385
309	/*****************************************************************************/	386	#include "etp.c"
310		387
311	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)	388	static struct etp_pool eio_pool;
312		389	#define EIO_POOL (&eio_pool)
313	/* calculate time difference in ~1/EIO_TICKS of a second */
314	ecb_inline int
315	tvdiff (struct timeval *tv1, struct timeval *tv2)
316	{
317	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
318	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
319	}
320
321	static unsigned int started, idle, wanted = 4;
322
323	static void (*want_poll_cb) (void);
324	static void (*done_poll_cb) (void);
325
326	static unsigned int max_poll_time; /* reslock */
327	static unsigned int max_poll_reqs; /* reslock */
328
329	static unsigned int nreqs; /* reqlock */
330	static unsigned int nready; /* reqlock */
331	static unsigned int npending; /* reqlock */
332	static unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
333	static unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
334
335	static xmutex_t wrklock;
336	static xmutex_t reslock;
337	static xmutex_t reqlock;
338	static xcond_t reqwait;
339
340	#if !HAVE_PREADWRITE
341	/*
342	* make our pread/pwrite emulation safe against themselves, but not against
343	* normal read/write by using a mutex. slows down execution a lot,
344	* but that's your problem, not mine.
345	*/
346	static xmutex_t preadwritelock;
347	#endif
348
349	typedef struct etp_worker
350	{
351	/* locked by wrklock */
352	struct etp_worker *prev, *next;
353
354	xthread_t tid;
355
356	/* locked by reslock, reqlock or wrklock */
357	ETP_REQ *req; /* currently processed request */
358
359	#ifdef ETP_WORKER_COMMON
360	ETP_WORKER_COMMON
361	#endif
362	} etp_worker;
363
364	static etp_worker wrk_first; /* NOT etp */
365
366	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
367	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
368
369	/* worker threads management */
370
371	static void ecb_cold
372	etp_worker_clear (etp_worker *wrk)
373	{
374	}
375
376	static void ecb_cold
377	etp_worker_free (etp_worker *wrk)
378	{
379	wrk->next->prev = wrk->prev;
380	wrk->prev->next = wrk->next;
381
382	free (wrk);
383	}
384
385	static unsigned int
386	etp_nreqs (void)
387	{
388	int retval;
389	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
390	retval = nreqs;
391	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
392	return retval;
393	}
394
395	static unsigned int
396	etp_nready (void)
397	{
398	unsigned int retval;
399
400	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
401	retval = nready;
402	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
403
404	return retval;
405	}
406
407	static unsigned int
408	etp_npending (void)
409	{
410	unsigned int retval;
411
412	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
413	retval = npending;
414	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
415
416	return retval;
417	}
418
419	static unsigned int
420	etp_nthreads (void)
421	{
422	unsigned int retval;
423
424	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
425	retval = started;
426	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
427
428	return retval;
429	}
430
431	/*
432	* a somewhat faster data structure might be nice, but
433	* with 8 priorities this actually needs <20 insns
434	* per shift, the most expensive operation.
435	*/
436	typedef struct {
437	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
438	int size;
439	} etp_reqq;
440
441	static etp_reqq req_queue;
442	static etp_reqq res_queue;
443
444	static void ecb_noinline ecb_cold
445	reqq_init (etp_reqq *q)
446	{
447	int pri;
448
449	for (pri = 0; pri < ETP_NUM_PRI; ++pri)
450	q->qs[pri] = q->qe[pri] = 0;
451
452	q->size = 0;
453	}
454
455	static int ecb_noinline
456	reqq_push (etp_reqq *q, ETP_REQ *req)
457	{
458	int pri = req->pri;
459	req->next = 0;
460
461	if (q->qe[pri])
462	{
463	q->qe[pri]->next = req;
464	q->qe[pri] = req;
465	}
466	else
467	q->qe[pri] = q->qs[pri] = req;
468
469	return q->size++;
470	}
471
472	static ETP_REQ * ecb_noinline
473	reqq_shift (etp_reqq *q)
474	{
475	int pri;
476
477	if (!q->size)
478	return 0;
479
480	--q->size;
481
482	for (pri = ETP_NUM_PRI; pri--; )
483	{
484	eio_req *req = q->qs[pri];
485
486	if (req)
487	{
488	if (!(q->qs[pri] = (eio_req *)req->next))
489	q->qe[pri] = 0;
490
491	return req;
492	}
493	}
494
495	abort ();
496	}
497
498	static int ecb_cold
499	etp_init (void (*want_poll)(void), void (*done_poll)(void))
500	{
501	X_MUTEX_CREATE (wrklock);
502	X_MUTEX_CREATE (reslock);
503	X_MUTEX_CREATE (reqlock);
504	X_COND_CREATE (reqwait);
505
506	reqq_init (&req_queue);
507	reqq_init (&res_queue);
508
509	wrk_first.next =
510	wrk_first.prev = &wrk_first;
511
512	started = 0;
513	idle = 0;
514	nreqs = 0;
515	nready = 0;
516	npending = 0;
517
518	want_poll_cb = want_poll;
519	done_poll_cb = done_poll;
520
521	return 0;
522	}
523
524	X_THREAD_PROC (etp_proc);
525
526	static void ecb_cold
527	etp_start_thread (void)
528	{
529	etp_worker *wrk = calloc (1, sizeof (etp_worker));
530
531	/*TODO*/
532	assert (("unable to allocate worker thread data", wrk));
533
534	X_LOCK (wrklock);
535
536	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
537	{
538	wrk->prev = &wrk_first;
539	wrk->next = wrk_first.next;
540	wrk_first.next->prev = wrk;
541	wrk_first.next = wrk;
542	++started;
543	}
544	else
545	free (wrk);
546
547	X_UNLOCK (wrklock);
548	}
549
550	static void
551	etp_maybe_start_thread (void)
552	{
553	if (ecb_expect_true (etp_nthreads () >= wanted))
554	return;
555
556	/* todo: maybe use idle here, but might be less exact */
557	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
558	return;
559
560	etp_start_thread ();
561	}
562
563	static void ecb_cold
564	etp_end_thread (void)
565	{
566	eio_req *req = calloc (1, sizeof (eio_req));
567
568	req->type = -1;
569	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
570
571	X_LOCK (reqlock);
572	reqq_push (&req_queue, req);
573	X_COND_SIGNAL (reqwait);
574	X_UNLOCK (reqlock);
575
576	X_LOCK (wrklock);
577	--started;
578	X_UNLOCK (wrklock);
579	}
580
581	static int
582	etp_poll (void)
583	{
584	unsigned int maxreqs;
585	unsigned int maxtime;
586	struct timeval tv_start, tv_now;
587
588	X_LOCK (reslock);
589	maxreqs = max_poll_reqs;
590	maxtime = max_poll_time;
591	X_UNLOCK (reslock);
592
593	if (maxtime)
594	gettimeofday (&tv_start, 0);
595
596	for (;;)
597	{
598	ETP_REQ *req;
599
600	etp_maybe_start_thread ();
601
602	X_LOCK (reslock);
603	req = reqq_shift (&res_queue);
604
605	if (req)
606	{
607	--npending;
608
609	if (!res_queue.size && done_poll_cb)
610	done_poll_cb ();
611	}
612
613	X_UNLOCK (reslock);
614
615	if (!req)
616	return 0;
617
618	X_LOCK (reqlock);
619	--nreqs;
620	X_UNLOCK (reqlock);
621
622	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
623	{
624	req->int1 = 1; /* mark request as delayed */
625	continue;
626	}
627	else
628	{
629	int res = ETP_FINISH (req);
630	if (ecb_expect_false (res))
631	return res;
632	}
633
634	if (ecb_expect_false (maxreqs && !--maxreqs))
635	break;
636
637	if (maxtime)
638	{
639	gettimeofday (&tv_now, 0);
640
641	if (tvdiff (&tv_start, &tv_now) >= maxtime)
642	break;
643	}
644	}
645
646	errno = EAGAIN;
647	return -1;
648	}
649
650	static void
651	etp_cancel (ETP_REQ *req)
652	{
653	req->cancelled = 1;
654
655	eio_grp_cancel (req);
656	}
657
658	static void
659	etp_submit (ETP_REQ *req)
660	{
661	req->pri -= ETP_PRI_MIN;
662
663	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
664	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
665
666	if (ecb_expect_false (req->type == EIO_GROUP))
667	{
668	/* I hope this is worth it :/ */
669	X_LOCK (reqlock);
670	++nreqs;
671	X_UNLOCK (reqlock);
672
673	X_LOCK (reslock);
674
675	++npending;
676
677	if (!reqq_push (&res_queue, req) && want_poll_cb)
678	want_poll_cb ();
679
680	X_UNLOCK (reslock);
681	}
682	else
683	{
684	X_LOCK (reqlock);
685	++nreqs;
686	++nready;
687	reqq_push (&req_queue, req);
688	X_COND_SIGNAL (reqwait);
689	X_UNLOCK (reqlock);
690
691	etp_maybe_start_thread ();
692	}
693	}
694
695	static void ecb_cold
696	etp_set_max_poll_time (double nseconds)
697	{
698	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
699	max_poll_time = nseconds * EIO_TICKS;
700	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
701	}
702
703	static void ecb_cold
704	etp_set_max_poll_reqs (unsigned int maxreqs)
705	{
706	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
707	max_poll_reqs = maxreqs;
708	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
709	}
710
711	static void ecb_cold
712	etp_set_max_idle (unsigned int nthreads)
713	{
714	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
715	max_idle = nthreads;
716	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
717	}
718
719	static void ecb_cold
720	etp_set_idle_timeout (unsigned int seconds)
721	{
722	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
723	idle_timeout = seconds;
724	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
725	}
726
727	static void ecb_cold
728	etp_set_min_parallel (unsigned int nthreads)
729	{
730	if (wanted < nthreads)
731	wanted = nthreads;
732	}
733
734	static void ecb_cold
735	etp_set_max_parallel (unsigned int nthreads)
736	{
737	if (wanted > nthreads)
738	wanted = nthreads;
739
740	while (started > wanted)
741	etp_end_thread ();
742	}
743		390
744	/*****************************************************************************/	391	/*****************************************************************************/
745		392
746	static void	393	static void
747	grp_try_feed (eio_req *grp)	394	grp_try_feed (eio_req *grp)
748	{	395	{
749	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	396	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
750	{	397	{
751	grp->flags &= ~EIO_FLAG_GROUPADD;	398	grp->flags &= ~ETP_FLAG_GROUPADD;
752		399
753	EIO_FEED (grp);	400	EIO_FEED (grp);
754		401
755	/* stop if no progress has been made */	402	/* stop if no progress has been made */
756	if (!(grp->flags & EIO_FLAG_GROUPADD))	403	if (!(grp->flags & ETP_FLAG_GROUPADD))
757	{	404	{
758	grp->feed = 0;	405	grp->feed = 0;
759	break;	406	break;
760	}	407	}
761	}	408	}
…		…
768		415
769	/* call feeder, if applicable */	416	/* call feeder, if applicable */
770	grp_try_feed (grp);	417	grp_try_feed (grp);
771		418
772	/* finish, if done */	419	/* finish, if done */
773	if (!grp->size && grp->int1)	420	if (!grp->size && grp->flags & ETP_FLAG_DELAYED)
774	return eio_finish (grp);	421	return eio_finish (grp);
775	else	422	else
776	return 0;	423	return 0;
777	}	424	}
778		425
…		…
814	}	461	}
815		462
816	void	463	void
817	eio_grp_cancel (eio_req *grp)	464	eio_grp_cancel (eio_req *grp)
818	{	465	{
819	for (grp = grp->grp_first; grp; grp = grp->grp_next)	466	etp_grp_cancel (EIO_POOL, grp);
820	eio_cancel (grp);
821	}	467	}
822		468
823	void	469	void
824	eio_cancel (eio_req *req)	470	eio_cancel (eio_req *req)
825	{	471	{
826	etp_cancel (req);	472	etp_cancel (EIO_POOL, req);
827	}	473	}
828		474
829	void	475	void
830	eio_submit (eio_req *req)	476	eio_submit (eio_req *req)
831	{	477	{
832	etp_submit (req);	478	etp_submit (EIO_POOL, req);
833	}	479	}
834		480
835	unsigned int	481	unsigned int
836	eio_nreqs (void)	482	eio_nreqs (void)
837	{	483	{
838	return etp_nreqs ();	484	return etp_nreqs (EIO_POOL);
839	}	485	}
840		486
841	unsigned int	487	unsigned int
842	eio_nready (void)	488	eio_nready (void)
843	{	489	{
844	return etp_nready ();	490	return etp_nready (EIO_POOL);
845	}	491	}
846		492
847	unsigned int	493	unsigned int
848	eio_npending (void)	494	eio_npending (void)
849	{	495	{
850	return etp_npending ();	496	return etp_npending (EIO_POOL);
851	}	497	}
852		498
853	unsigned int ecb_cold	499	unsigned int ecb_cold
854	eio_nthreads (void)	500	eio_nthreads (void)
855	{	501	{
856	return etp_nthreads ();	502	return etp_nthreads (EIO_POOL);
857	}	503	}
858		504
859	void ecb_cold	505	void ecb_cold
860	eio_set_max_poll_time (double nseconds)	506	eio_set_max_poll_time (double nseconds)
861	{	507	{
862	etp_set_max_poll_time (nseconds);	508	etp_set_max_poll_time (EIO_POOL, nseconds);
863	}	509	}
864		510
865	void ecb_cold	511	void ecb_cold
866	eio_set_max_poll_reqs (unsigned int maxreqs)	512	eio_set_max_poll_reqs (unsigned int maxreqs)
867	{	513	{
868	etp_set_max_poll_reqs (maxreqs);	514	etp_set_max_poll_reqs (EIO_POOL, maxreqs);
869	}	515	}
870		516
871	void ecb_cold	517	void ecb_cold
872	eio_set_max_idle (unsigned int nthreads)	518	eio_set_max_idle (unsigned int nthreads)
873	{	519	{
874	etp_set_max_idle (nthreads);	520	etp_set_max_idle (EIO_POOL, nthreads);
875	}	521	}
876		522
877	void ecb_cold	523	void ecb_cold
878	eio_set_idle_timeout (unsigned int seconds)	524	eio_set_idle_timeout (unsigned int seconds)
879	{	525	{
880	etp_set_idle_timeout (seconds);	526	etp_set_idle_timeout (EIO_POOL, seconds);
881	}	527	}
882		528
883	void ecb_cold	529	void ecb_cold
884	eio_set_min_parallel (unsigned int nthreads)	530	eio_set_min_parallel (unsigned int nthreads)
885	{	531	{
886	etp_set_min_parallel (nthreads);	532	etp_set_min_parallel (EIO_POOL, nthreads);
887	}	533	}
888		534
889	void ecb_cold	535	void ecb_cold
890	eio_set_max_parallel (unsigned int nthreads)	536	eio_set_max_parallel (unsigned int nthreads)
891	{	537	{
892	etp_set_max_parallel (nthreads);	538	etp_set_max_parallel (EIO_POOL, nthreads);
893	}	539	}
894		540
895	int eio_poll (void)	541	int eio_poll (void)
896	{	542	{
897	return etp_poll ();	543	return etp_poll (EIO_POOL);
898	}	544	}
899		545
900	/*****************************************************************************/	546	/*****************************************************************************/
901	/* work around various missing functions */	547	/* work around various missing functions */
902
903	#if !HAVE_PREADWRITE
904	# undef pread
905	# undef pwrite
906	# define pread eio__pread
907	# define pwrite eio__pwrite
908
909	static eio_ssize_t
910	eio__pread (int fd, void *buf, size_t count, off_t offset)
911	{
912	eio_ssize_t res;
913	off_t ooffset;
914
915	X_LOCK (preadwritelock);
916	ooffset = lseek (fd, 0, SEEK_CUR);
917	lseek (fd, offset, SEEK_SET);
918	res = read (fd, buf, count);
919	lseek (fd, ooffset, SEEK_SET);
920	X_UNLOCK (preadwritelock);
921
922	return res;
923	}
924
925	static eio_ssize_t
926	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
927	{
928	eio_ssize_t res;
929	off_t ooffset;
930
931	X_LOCK (preadwritelock);
932	ooffset = lseek (fd, 0, SEEK_CUR);
933	lseek (fd, offset, SEEK_SET);
934	res = write (fd, buf, count);
935	lseek (fd, ooffset, SEEK_SET);
936	X_UNLOCK (preadwritelock);
937
938	return res;
939	}
940	#endif
941		548
942	#ifndef HAVE_UTIMES	549	#ifndef HAVE_UTIMES
943		550
944	# undef utimes	551	# undef utimes
945	# define utimes(path,times) eio__utimes (path, times)	552	# define utimes(path,times) eio__utimes (path, times)
…		…
987	int res;	594	int res;
988		595
989	#if HAVE_SYS_SYNCFS	596	#if HAVE_SYS_SYNCFS
990	res = (int)syscall (__NR_syncfs, (int)(fd));	597	res = (int)syscall (__NR_syncfs, (int)(fd));
991	#else	598	#else
992	res = -1;	599	res = EIO_ENOSYS ();
993	errno = ENOSYS;
994	#endif	600	#endif
995		601
996	if (res < 0 && errno == ENOSYS && fd >= 0)	602	if (res < 0 && errno == ENOSYS && fd >= 0)
997	sync ();	603	sync ();
998		604
…		…
1028	}	634	}
1029		635
1030	static int	636	static int
1031	eio__fallocate (int fd, int mode, off_t offset, size_t len)	637	eio__fallocate (int fd, int mode, off_t offset, size_t len)
1032	{	638	{
1033	#if HAVE_FALLOCATE	639	#if HAVE_LINUX_FALLOCATE
1034	return fallocate (fd, mode, offset, len);	640	return fallocate (fd, mode, offset, len);
1035	#else	641	#else
1036	errno = ENOSYS;	642	return EIO_ENOSYS ();
1037	return -1;
1038	#endif	643	#endif
1039	}	644	}
1040		645
1041	#if !HAVE_READAHEAD	646	#if !HAVE_READAHEAD
1042	# undef readahead	647	# undef readahead
…		…
1057	todo -= len;	662	todo -= len;
1058	}	663	}
1059		664
1060	FUBd;	665	FUBd;
1061		666
1062	errno = 0;	667	/* linux's readahead basically only fails for EBADF or EINVAL (not mmappable) */
		668	/* but not for e.g. EIO or eof, so we also never fail */
1063	return count;	669	return 0;
1064	}	670	}
1065		671
1066	#endif	672	#endif
1067		673
1068	/* sendfile always needs emulation */	674	/* sendfile always needs emulation */
…		…
1103		709
1104	/* according to source inspection, this is correct, and useful behaviour */	710	/* according to source inspection, this is correct, and useful behaviour */
1105	if (sbytes)	711	if (sbytes)
1106	res = sbytes;	712	res = sbytes;
1107		713
1108	# elif defined (__APPLE__)	714	# elif defined __APPLE__
1109	off_t sbytes = count;	715	off_t sbytes = count;
1110	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);	716	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
1111		717
1112	/* according to the manpage, sbytes is always valid */	718	/* according to the manpage, sbytes is always valid */
1113	if (sbytes)	719	if (sbytes)
…		…
1140	HANDLE h = TO_SOCKET (ifd);	746	HANDLE h = TO_SOCKET (ifd);
1141	SetFilePointer (h, offset, 0, FILE_BEGIN);	747	SetFilePointer (h, offset, 0, FILE_BEGIN);
1142	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);	748	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
1143		749
1144	#else	750	#else
1145	res = -1;	751	res = EIO_ENOSYS ();
1146	errno = ENOSYS;
1147	#endif	752	#endif
1148		753
1149	/* we assume sendfile can copy at least 128mb in one go */	754	/* we assume sendfile can copy at least 128mb in one go */
1150	if (res <= 128 * 1024 * 1024)	755	if (res <= 128 * 1024 * 1024)
1151	{	756	{
…		…
1338		943
1339	/*****************************************************************************/	944	/*****************************************************************************/
1340	/* requests implemented outside eio_execute, because they are so large */	945	/* requests implemented outside eio_execute, because they are so large */
1341		946
1342	static void	947	static void
1343	eio__realpath (eio_req *req, etp_worker *self)	948	eio__lseek (eio_req *req)
1344	{	949	{
1345	char *rel = req->ptr1;	950	/* this usually gets optimised away completely, or your compiler sucks, */
		951	/* or the whence constants really are not 0, 1, 2 */
		952	int whence = req->int2 == EIO_SEEK_SET ? SEEK_SET
		953	: req->int2 == EIO_SEEK_CUR ? SEEK_CUR
		954	: req->int2 == EIO_SEEK_END ? SEEK_END
		955	: req->int2;
		956
		957	req->offs = lseek (req->int1, req->offs, whence);
		958	req->result = req->offs == (off_t)-1 ? -1 : 0;
		959	}
		960
		961	/* result will always end up in tmpbuf, there is always space for adding a 0-byte */
		962	static int
		963	eio__realpath (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
		964	{
1346	char *res;	965	char *res;
		966	const char *rel = path;
1347	char *tmp1, *tmp2;	967	char *tmp1, *tmp2;
1348	#if SYMLOOP_MAX > 32	968	#if SYMLOOP_MAX > 32
1349	int symlinks = SYMLOOP_MAX;	969	int symlinks = SYMLOOP_MAX;
1350	#else	970	#else
1351	int symlinks = 32;	971	int symlinks = 32;
1352	#endif	972	#endif
1353		973
1354	req->result = -1;
1355
1356	errno = EINVAL;	974	errno = EINVAL;
1357	if (!rel)	975	if (!rel)
1358	return;	976	return -1;
1359		977
1360	errno = ENOENT;	978	errno = ENOENT;
1361	if (!*rel)	979	if (!*rel)
1362	return;	980	return -1;
1363		981
1364	if (!req->ptr2)	982	res = etp_tmpbuf_get (tmpbuf, PATH_MAX * 3);
1365	{	983	#ifdef _WIN32
1366	X_LOCK (wrklock);	984	if (_access (rel, 4) != 0)
1367	req->flags |= EIO_FLAG_PTR2_FREE;
1368	X_UNLOCK (wrklock);
1369	req->ptr2 = malloc (PATH_MAX * 3);
1370
1371	errno = ENOMEM;
1372	if (!req->ptr2)
1373	return;	985	return -1;
1374	}
1375		986
1376	res = req->ptr2;	987	symlinks = GetFullPathName (rel, PATH_MAX * 3, res, 0);
		988
		989	errno = ENAMETOOLONG;
		990	if (symlinks >= PATH_MAX * 3)
		991	return -1;
		992
		993	errno = EIO;
		994	if (symlinks <= 0)
		995	return -1;
		996
		997	return symlinks;
		998
		999	#else
1377	tmp1 = res + PATH_MAX;	1000	tmp1 = res + PATH_MAX;
1378	tmp2 = tmp1 + PATH_MAX;	1001	tmp2 = tmp1 + PATH_MAX;
1379		1002
1380	#if 0 /* disabled, the musl way to do things is just too racy */	1003	#if 0 /* disabled, the musl way to do things is just too racy */
1381	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)	1004	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
…		…
1385		1008
1386	if (fd >= 0)	1009	if (fd >= 0)
1387	{	1010	{
1388	sprintf (tmp1, "/proc/self/fd/%d", fd);	1011	sprintf (tmp1, "/proc/self/fd/%d", fd);
1389	req->result = readlink (tmp1, res, PATH_MAX);	1012	req->result = readlink (tmp1, res, PATH_MAX);
		1013	/* here we should probably stat the open file and the disk file, to make sure they still match */
1390	close (fd);	1014	close (fd);
1391
1392	/* here we should probably stat the open file and the disk file, to make sure they still match */
1393		1015
1394	if (req->result > 0)	1016	if (req->result > 0)
1395	goto done;	1017	goto done;
1396	}	1018	}
1397	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)	1019	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
1398	return;	1020	return -1;
1399	}	1021	}
1400	#endif	1022	#endif
1401	#endif	1023	#endif
1402		1024
1403	if (*rel != '/')	1025	if (*rel != '/')
1404	{	1026	{
		1027	int len;
		1028
		1029	errno = ENOENT;
		1030	if (wd == EIO_INVALID_WD)
		1031	return -1;
		1032
		1033	if (wd == EIO_CWD)
		1034	{
1405	if (!getcwd (res, PATH_MAX))	1035	if (!getcwd (res, PATH_MAX))
1406	return;	1036	return -1;
		1037
		1038	len = strlen (res);
		1039	}
		1040	else
		1041	memcpy (res, wd->str, len = wd->len);
1407		1042
1408	if (res [1]) /* only use if not / */	1043	if (res [1]) /* only use if not / */
1409	res += strlen (res);	1044	res += len;
1410	}	1045	}
1411		1046
1412	while (*rel)	1047	while (*rel)
1413	{	1048	{
1414	eio_ssize_t len, linklen;	1049	eio_ssize_t len, linklen;
1415	char *beg = rel;	1050	const char *beg = rel;
1416		1051
1417	while (*rel && *rel != '/')	1052	while (*rel && *rel != '/')
1418	++rel;	1053	++rel;
1419		1054
1420	len = rel - beg;	1055	len = rel - beg;
…		…
1432		1067
1433	if (beg [1] == '.' && len == 2)	1068	if (beg [1] == '.' && len == 2)
1434	{	1069	{
1435	/* .. - back up one component, if possible */	1070	/* .. - back up one component, if possible */
1436		1071
1437	while (res != req->ptr2)	1072	while (res != tmpbuf->ptr)
1438	if (*--res == '/')	1073	if (*--res == '/')
1439	break;	1074	break;
1440		1075
1441	continue;	1076	continue;
1442	}	1077	}
1443	}	1078	}
1444		1079
1445	errno = ENAMETOOLONG;	1080	errno = ENAMETOOLONG;
1446	if (res + 1 + len + 1 >= tmp1)	1081	if (res + 1 + len + 1 >= tmp1)
1447	return;	1082	return -1;
1448		1083
1449	/* copy one component */	1084	/* copy one component */
1450	*res = '/';	1085	*res = '/';
1451	memcpy (res + 1, beg, len);	1086	memcpy (res + 1, beg, len);
1452		1087
1453	/* zero-terminate, for readlink */	1088	/* zero-terminate, for readlink */
1454	res [len + 1] = 0;	1089	res [len + 1] = 0;
1455		1090
1456	/* now check if it's a symlink */	1091	/* now check if it's a symlink */
1457	linklen = readlink (req->ptr2, tmp1, PATH_MAX);	1092	linklen = readlink (tmpbuf->ptr, tmp1, PATH_MAX);
1458		1093
1459	if (linklen < 0)	1094	if (linklen < 0)
1460	{	1095	{
1461	if (errno != EINVAL)	1096	if (errno != EINVAL)
1462	return;	1097	return -1;
1463		1098
1464	/* it's a normal directory. hopefully */	1099	/* it's a normal directory. hopefully */
1465	res += len + 1;	1100	res += len + 1;
1466	}	1101	}
1467	else	1102	else
…		…
1469	/* yay, it was a symlink - build new path in tmp2 */	1104	/* yay, it was a symlink - build new path in tmp2 */
1470	int rellen = strlen (rel);	1105	int rellen = strlen (rel);
1471		1106
1472	errno = ENAMETOOLONG;	1107	errno = ENAMETOOLONG;
1473	if (linklen + 1 + rellen >= PATH_MAX)	1108	if (linklen + 1 + rellen >= PATH_MAX)
1474	return;	1109	return -1;
1475		1110
1476	errno = ELOOP;	1111	errno = ELOOP;
1477	if (!--symlinks)	1112	if (!--symlinks)
1478	return;	1113	return -1;
1479		1114
1480	if (*tmp1 == '/')	1115	if (*tmp1 == '/')
1481	res = req->ptr2; /* symlink resolves to an absolute path */	1116	res = tmpbuf->ptr; /* symlink resolves to an absolute path */
1482		1117
1483	/* we need to be careful, as rel might point into tmp2 already */	1118	/* we need to be careful, as rel might point into tmp2 already */
1484	memmove (tmp2 + linklen + 1, rel, rellen + 1);	1119	memmove (tmp2 + linklen + 1, rel, rellen + 1);
1485	tmp2 [linklen] = '/';	1120	tmp2 [linklen] = '/';
1486	memcpy (tmp2, tmp1, linklen);	1121	memcpy (tmp2, tmp1, linklen);
…		…
1488	rel = tmp2;	1123	rel = tmp2;
1489	}	1124	}
1490	}	1125	}
1491		1126
1492	/* special case for the lone root path */	1127	/* special case for the lone root path */
1493	if (res == req->ptr2)	1128	if (res == tmpbuf->ptr)
1494	*res++ = '/';	1129	*res++ = '/';
1495		1130
1496	req->result = res - (char *)req->ptr2;	1131	return res - (char *)tmpbuf->ptr;
1497		1132	#endif
1498	done:
1499	req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */
1500	}	1133	}
1501		1134
1502	static signed char	1135	static signed char
1503	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)	1136	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
1504	{	1137	{
…		…
1692	#ifdef _WIN32	1325	#ifdef _WIN32
1693	{	1326	{
1694	int len = strlen ((const char *)req->ptr1);	1327	int len = strlen ((const char *)req->ptr1);
1695	char *path = malloc (MAX_PATH);	1328	char *path = malloc (MAX_PATH);
1696	const char *fmt;	1329	const char *fmt;
		1330	const char *reqpath = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
1697		1331
1698	if (!len)	1332	if (!len)
1699	fmt = "./*";	1333	fmt = "./*";
1700	else if (((const char *)req->ptr1)[len - 1] == '/' || ((const char *)req->ptr1)[len - 1] == '\\')	1334	else if (reqpath[len - 1] == '/' || reqpath[len - 1] == '\\')
1701	fmt = "%s*";	1335	fmt = "%s*";
1702	else	1336	else
1703	fmt = "%s/*";	1337	fmt = "%s/*";
1704		1338
1705	_snprintf (path, MAX_PATH, fmt, (const char *)req->ptr1);	1339	_snprintf (path, MAX_PATH, fmt, reqpath);
1706	dirp = FindFirstFile (path, &entp);	1340	dirp = FindFirstFile (path, &entp);
1707	free (path);	1341	free (path);
1708		1342
1709	if (dirp == INVALID_HANDLE_VALUE)	1343	if (dirp == INVALID_HANDLE_VALUE)
1710	{	1344	{
1711	dirp = 0;
1712
1713	/* should steal _dosmaperr */	1345	/* should steal _dosmaperr */
1714	switch (GetLastError ())	1346	switch (GetLastError ())
1715	{	1347	{
1716	case ERROR_FILE_NOT_FOUND:	1348	case ERROR_FILE_NOT_FOUND:
1717	req->result = 0;	1349	req->result = 0;
1718	break;	1350	break;
1719		1351
1720	case ERROR_INVALID_NAME:	1352	case ERROR_INVALID_NAME:
1721	case ERROR_PATH_NOT_FOUND:	1353	case ERROR_PATH_NOT_FOUND:
1722	case ERROR_NO_MORE_FILES:	1354	case ERROR_NO_MORE_FILES:
1723	errno = ENOENT;	1355	errno = ENOENT;
1724	break;	1356	break;
1725		1357
1726	case ERROR_NOT_ENOUGH_MEMORY:	1358	case ERROR_NOT_ENOUGH_MEMORY:
1727	errno = ENOMEM;	1359	errno = ENOMEM;
1728	break;	1360	break;
1729		1361
1730	default:	1362	default:
1731	errno = EINVAL;	1363	errno = EINVAL;
1732	break;	1364	break;
1733	}	1365	}
		1366
		1367	return;
1734	}	1368	}
1735	}	1369	}
1736	#else	1370	#else
		1371	#if HAVE_AT
		1372	if (req->wd)
		1373	{
		1374	int fd = openat (WD2FD (req->wd), req->ptr1, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
		1375
		1376	if (fd < 0)
		1377	return;
		1378
		1379	dirp = fdopendir (fd);
		1380
		1381	if (!dirp)
		1382	close (fd);
		1383	}
		1384	else
1737	dirp = opendir (req->ptr1);	1385	dirp = opendir (req->ptr1);
		1386	#else
		1387	dirp = opendir (wd_expand (&self->tmpbuf, req->wd, req->ptr1));
		1388	#endif
		1389
		1390	if (!dirp)
		1391	return;
1738	#endif	1392	#endif
1739		1393
1740	if (req->flags & EIO_FLAG_PTR1_FREE)	1394	if (req->flags & EIO_FLAG_PTR1_FREE)
1741	free (req->ptr1);	1395	free (req->ptr1);
1742		1396
1743	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;	1397	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
1744	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;	1398	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
1745	req->ptr2 = names = malloc (namesalloc);	1399	req->ptr2 = names = malloc (namesalloc);
1746		1400
1747	if (dirp && names && (!flags || dents))	1401	if (!names || (flags && !dents))
		1402	return;
		1403
1748	for (;;)	1404	for (;;)
1749	{	1405	{
1750	int done;	1406	int done;
1751		1407
1752	#ifdef _WIN32	1408	#ifdef _WIN32
1753	done = !dirp;	1409	done = !dirp;
1754	#else	1410	#else
1755	errno = 0;	1411	errno = 0;
1756	entp = readdir (dirp);	1412	entp = readdir (dirp);
1757	done = !entp;	1413	done = !entp;
1758	#endif	1414	#endif
1759		1415
1760	if (done)	1416	if (done)
1761	{	1417	{
1762	#ifndef _WIN32	1418	#ifndef _WIN32
1763	int old_errno = errno;	1419	int old_errno = errno;
1764	closedir (dirp);	1420	closedir (dirp);
1765	errno = old_errno;	1421	errno = old_errno;
1766		1422
1767	if (errno)	1423	if (errno)
1768	break;	1424	break;
1769	#endif	1425	#endif
1770		1426
1771	/* sort etc. */	1427	/* sort etc. */
1772	req->int1 = flags;	1428	req->int1 = flags;
1773	req->result = dentoffs;	1429	req->result = dentoffs;
1774		1430
1775	if (flags & EIO_READDIR_STAT_ORDER)	1431	if (flags & EIO_READDIR_STAT_ORDER)
1776	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);	1432	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
1777	else if (flags & EIO_READDIR_DIRS_FIRST)	1433	else if (flags & EIO_READDIR_DIRS_FIRST)
1778	if (flags & EIO_READDIR_FOUND_UNKNOWN)	1434	if (flags & EIO_READDIR_FOUND_UNKNOWN)
1779	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */	1435	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
1780	else	1436	else
		1437	{
		1438	/* in this case, all is known, and we just put dirs first and sort them */
		1439	eio_dirent *oth = dents + dentoffs;
		1440	eio_dirent *dir = dents;
		1441
		1442	/* now partition dirs to the front, and non-dirs to the back */
		1443	/* by walking from both sides and swapping if necessary */
		1444	while (oth > dir)
		1445	{
		1446	if (dir->type == EIO_DT_DIR)
		1447	++dir;
		1448	else if ((--oth)->type == EIO_DT_DIR)
		1449	{
		1450	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
		1451
		1452	++dir;
		1453	}
		1454	}
		1455
		1456	/* now sort the dirs only (dirs all have the same score) */
		1457	eio_dent_sort (dents, dir - dents, 0, inode_bits);
		1458	}
		1459
		1460	break;
		1461	}
		1462
		1463	/* now add the entry to our list(s) */
		1464	name = D_NAME (entp);
		1465
		1466	/* skip . and .. entries */
		1467	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1468	{
		1469	int len = D_NAMLEN (entp) + 1;
		1470
		1471	while (ecb_expect_false (namesoffs + len > namesalloc))
		1472	{
		1473	namesalloc *= 2;
		1474	req->ptr2 = names = realloc (names, namesalloc);
		1475
		1476	if (!names)
		1477	break;
		1478	}
		1479
		1480	memcpy (names + namesoffs, name, len);
		1481
		1482	if (dents)
		1483	{
		1484	struct eio_dirent *ent;
		1485
		1486	if (ecb_expect_false (dentoffs == dentalloc))
1781	{	1487	{
1782	/* in this case, all is known, and we just put dirs first and sort them */	1488	dentalloc *= 2;
		1489	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
		1490
		1491	if (!dents)
		1492	break;
		1493	}
		1494
1783	eio_dirent *oth = dents + dentoffs;	1495	ent = dents + dentoffs;
1784	eio_dirent *dir = dents;
1785		1496
1786	/* now partition dirs to the front, and non-dirs to the back */	1497	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
1787	/* by walking from both sides and swapping if necessary */	1498	ent->namelen = len - 1;
1788	while (oth > dir)	1499	ent->inode = D_INO (entp);
		1500
		1501	inode_bits |= ent->inode;
		1502
		1503	switch (D_TYPE (entp))
		1504	{
		1505	default:
		1506	ent->type = EIO_DT_UNKNOWN;
		1507	flags |= EIO_READDIR_FOUND_UNKNOWN;
		1508	break;
		1509
		1510	#ifdef DT_FIFO
		1511	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
		1512	#endif
		1513	#ifdef DT_CHR
		1514	case DT_CHR: ent->type = EIO_DT_CHR; break;
		1515	#endif
		1516	#ifdef DT_MPC
		1517	case DT_MPC: ent->type = EIO_DT_MPC; break;
		1518	#endif
		1519	#ifdef DT_DIR
		1520	case DT_DIR: ent->type = EIO_DT_DIR; break;
		1521	#endif
		1522	#ifdef DT_NAM
		1523	case DT_NAM: ent->type = EIO_DT_NAM; break;
		1524	#endif
		1525	#ifdef DT_BLK
		1526	case DT_BLK: ent->type = EIO_DT_BLK; break;
		1527	#endif
		1528	#ifdef DT_MPB
		1529	case DT_MPB: ent->type = EIO_DT_MPB; break;
		1530	#endif
		1531	#ifdef DT_REG
		1532	case DT_REG: ent->type = EIO_DT_REG; break;
		1533	#endif
		1534	#ifdef DT_NWK
		1535	case DT_NWK: ent->type = EIO_DT_NWK; break;
		1536	#endif
		1537	#ifdef DT_CMP
		1538	case DT_CMP: ent->type = EIO_DT_CMP; break;
		1539	#endif
		1540	#ifdef DT_LNK
		1541	case DT_LNK: ent->type = EIO_DT_LNK; break;
		1542	#endif
		1543	#ifdef DT_SOCK
		1544	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
		1545	#endif
		1546	#ifdef DT_DOOR
		1547	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
		1548	#endif
		1549	#ifdef DT_WHT
		1550	case DT_WHT: ent->type = EIO_DT_WHT; break;
		1551	#endif
		1552	}
		1553
		1554	ent->score = 7;
		1555
		1556	if (flags & EIO_READDIR_DIRS_FIRST)
		1557	{
		1558	if (ent->type == EIO_DT_UNKNOWN)
1789	{	1559	{
1790	if (dir->type == EIO_DT_DIR)	1560	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
1791	++dir;	1561	ent->score = 1;
1792	else if ((--oth)->type == EIO_DT_DIR)	1562	else if (!strchr (name, '.')) /* absence of dots indicate likely dirs */
1793	{	1563	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1794	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
1795
1796	++dir;
1797	}
1798	}	1564	}
1799		1565	else if (ent->type == EIO_DT_DIR)
1800	/* now sort the dirs only (dirs all have the same score) */	1566	ent->score = 0;
1801	eio_dent_sort (dents, dir - dents, 0, inode_bits);
1802	}	1567	}
1803
1804	break;
1805	}
1806
1807	/* now add the entry to our list(s) */
1808	name = D_NAME (entp);
1809
1810	/* skip . and .. entries */
1811	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1812	{
1813	int len = D_NAMLEN (entp) + 1;
1814
1815	while (ecb_expect_false (namesoffs + len > namesalloc))
1816	{
1817	namesalloc *= 2;
1818	req->ptr2 = names = realloc (names, namesalloc);
1819
1820	if (!names)
1821	break;
1822	}	1568	}
1823		1569
1824	memcpy (names + namesoffs, name, len);
1825
1826	if (dents)
1827	{
1828	struct eio_dirent *ent;
1829
1830	if (ecb_expect_false (dentoffs == dentalloc))
1831	{
1832	dentalloc *= 2;
1833	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
1834
1835	if (!dents)
1836	break;
1837	}
1838
1839	ent = dents + dentoffs;
1840
1841	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
1842	ent->namelen = len - 1;
1843	ent->inode = D_INO (entp);
1844
1845	inode_bits |= ent->inode;
1846
1847	switch (D_TYPE (entp))
1848	{
1849	default:
1850	ent->type = EIO_DT_UNKNOWN;
1851	flags |= EIO_READDIR_FOUND_UNKNOWN;
1852	break;
1853
1854	#ifdef DT_FIFO
1855	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
1856	#endif
1857	#ifdef DT_CHR
1858	case DT_CHR: ent->type = EIO_DT_CHR; break;
1859	#endif
1860	#ifdef DT_MPC
1861	case DT_MPC: ent->type = EIO_DT_MPC; break;
1862	#endif
1863	#ifdef DT_DIR
1864	case DT_DIR: ent->type = EIO_DT_DIR; break;
1865	#endif
1866	#ifdef DT_NAM
1867	case DT_NAM: ent->type = EIO_DT_NAM; break;
1868	#endif
1869	#ifdef DT_BLK
1870	case DT_BLK: ent->type = EIO_DT_BLK; break;
1871	#endif
1872	#ifdef DT_MPB
1873	case DT_MPB: ent->type = EIO_DT_MPB; break;
1874	#endif
1875	#ifdef DT_REG
1876	case DT_REG: ent->type = EIO_DT_REG; break;
1877	#endif
1878	#ifdef DT_NWK
1879	case DT_NWK: ent->type = EIO_DT_NWK; break;
1880	#endif
1881	#ifdef DT_CMP
1882	case DT_CMP: ent->type = EIO_DT_CMP; break;
1883	#endif
1884	#ifdef DT_LNK
1885	case DT_LNK: ent->type = EIO_DT_LNK; break;
1886	#endif
1887	#ifdef DT_SOCK
1888	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
1889	#endif
1890	#ifdef DT_DOOR
1891	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
1892	#endif
1893	#ifdef DT_WHT
1894	case DT_WHT: ent->type = EIO_DT_WHT; break;
1895	#endif
1896	}
1897
1898	ent->score = 7;
1899
1900	if (flags & EIO_READDIR_DIRS_FIRST)
1901	{
1902	if (ent->type == EIO_DT_UNKNOWN)
1903	{
1904	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
1905	ent->score = 1;
1906	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
1907	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1908	}
1909	else if (ent->type == EIO_DT_DIR)
1910	ent->score = 0;
1911	}
1912	}
1913
1914	namesoffs += len;	1570	namesoffs += len;
1915	++dentoffs;	1571	++dentoffs;
1916	}	1572	}
1917		1573
1918	if (EIO_CANCELLED (req))	1574	if (EIO_CANCELLED (req))
1919	{	1575	{
1920	errno = ECANCELED;	1576	errno = ECANCELED;
1921	break;	1577	break;
1922	}	1578	}
1923		1579
1924	#ifdef _WIN32	1580	#ifdef _WIN32
1925	if (!FindNextFile (dirp, &entp))	1581	if (!FindNextFile (dirp, &entp))
1926	{	1582	{
1927	FindClose (dirp);	1583	FindClose (dirp);
1928	dirp = 0;	1584	dirp = 0;
1929	}	1585	}
1930	#endif	1586	#endif
1931	}	1587	}
1932	}	1588	}
		1589
		1590	/*****************************************************************************/
		1591	/* working directory stuff */
		1592	/* various deficiencies in the posix 2008 api force us to */
		1593	/* keep the absolute path in string form at all times */
		1594	/* fuck yeah. */
		1595
		1596	#if !HAVE_AT
		1597
		1598	/* a bit like realpath, but usually faster because it doesn'T have to return */
		1599	/* an absolute or canonical path */
		1600	static const char *
		1601	wd_expand (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
		1602	{
		1603	if (!wd || *path == '/')
		1604	return path;
		1605
		1606	if (path [0] == '.' && !path [1])
		1607	return wd->str;
		1608
		1609	{
		1610	int l1 = wd->len;
		1611	int l2 = strlen (path);
		1612
		1613	char *res = etp_tmpbuf_get (tmpbuf, l1 + l2 + 2);
		1614
		1615	memcpy (res, wd->str, l1);
		1616	res [l1] = '/';
		1617	memcpy (res + l1 + 1, path, l2 + 1);
		1618
		1619	return res;
		1620	}
		1621	}
		1622
		1623	#endif
		1624
		1625	static eio_wd
		1626	eio__wd_open_sync (struct etp_tmpbuf *tmpbuf, eio_wd wd, const char *path)
		1627	{
		1628	int fd;
		1629	eio_wd res;
		1630	int len = eio__realpath (tmpbuf, wd, path);
		1631
		1632	if (len < 0)
		1633	return EIO_INVALID_WD;
		1634
		1635	#if HAVE_AT
		1636	fd = openat (WD2FD (wd), path, O_CLOEXEC | O_SEARCH | O_DIRECTORY);
		1637
		1638	if (fd < 0)
		1639	return EIO_INVALID_WD;
		1640	#endif
		1641
		1642	res = malloc (sizeof (*res) + len); /* one extra 0-byte */
		1643
		1644	#if HAVE_AT
		1645	res->fd = fd;
		1646	#endif
		1647
		1648	res->len = len;
		1649	memcpy (res->str, tmpbuf->ptr, len);
		1650	res->str [len] = 0;
		1651
		1652	return res;
		1653	}
		1654
		1655	eio_wd
		1656	eio_wd_open_sync (eio_wd wd, const char *path)
		1657	{
		1658	struct etp_tmpbuf tmpbuf = { };
		1659	wd = eio__wd_open_sync (&tmpbuf, wd, path);
		1660	free (tmpbuf.ptr);
		1661
		1662	return wd;
		1663	}
		1664
		1665	void
		1666	eio_wd_close_sync (eio_wd wd)
		1667	{
		1668	if (wd != EIO_INVALID_WD && wd != EIO_CWD)
		1669	{
		1670	#if HAVE_AT
		1671	close (wd->fd);
		1672	#endif
		1673	free (wd);
		1674	}
		1675	}
		1676
		1677	#if HAVE_AT
		1678
		1679	/* they forgot these */
		1680
		1681	static int
		1682	eio__truncateat (int dirfd, const char *path, off_t length)
		1683	{
		1684	int fd = openat (dirfd, path, O_WRONLY | O_CLOEXEC);
		1685	int res;
		1686
		1687	if (fd < 0)
		1688	return fd;
		1689
		1690	res = ftruncate (fd, length);
		1691	close (fd);
		1692	return res;
		1693	}
		1694
		1695	static int
		1696	eio__statvfsat (int dirfd, const char *path, struct statvfs *buf)
		1697	{
		1698	int fd = openat (dirfd, path, O_SEARCH | O_CLOEXEC);
		1699	int res;
		1700
		1701	if (fd < 0)
		1702	return fd;
		1703
		1704	res = fstatvfs (fd, buf);
		1705	close (fd);
		1706	return res;
		1707
		1708	}
		1709
		1710	#endif
1933		1711
1934	/*****************************************************************************/	1712	/*****************************************************************************/
1935		1713
1936	#define ALLOC(len) \	1714	#define ALLOC(len) \
1937	if (!req->ptr2) \	1715	if (!req->ptr2) \
1938	{ \	1716	{ \
1939	X_LOCK (wrklock); \	1717	X_LOCK (EIO_POOL->wrklock); \
1940	req->flags |= EIO_FLAG_PTR2_FREE; \	1718	req->flags |= EIO_FLAG_PTR2_FREE; \
1941	X_UNLOCK (wrklock); \	1719	X_UNLOCK (EIO_POOL->wrklock); \
1942	req->ptr2 = malloc (len); \	1720	req->ptr2 = malloc (len); \
1943	if (!req->ptr2) \	1721	if (!req->ptr2) \
1944	{ \	1722	{ \
1945	errno = ENOMEM; \	1723	errno = ENOMEM; \
1946	req->result = -1; \	1724	req->result = -1; \
1947	break; \	1725	break; \
1948	} \	1726	} \
1949	}	1727	}
1950		1728
1951	X_THREAD_PROC (etp_proc)
1952	{
1953	ETP_REQ *req;
1954	struct timespec ts;
1955	etp_worker *self = (etp_worker *)thr_arg;
1956
1957	#if HAVE_PRCTL_SET_NAME
1958	prctl (PR_SET_NAME, (unsigned long)"eio_thread", 0, 0, 0);
1959	#endif
1960
1961	/* try to distribute timeouts somewhat evenly */
1962	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
1963
1964	for (;;)
1965	{
1966	ts.tv_sec = 0;
1967
1968	X_LOCK (reqlock);
1969
1970	for (;;)
1971	{
1972	self->req = req = reqq_shift (&req_queue);
1973
1974	if (req)
1975	break;
1976
1977	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
1978	{
1979	X_UNLOCK (reqlock);
1980	X_LOCK (wrklock);
1981	--started;
1982	X_UNLOCK (wrklock);
1983	goto quit;
1984	}
1985
1986	++idle;
1987
1988	if (idle <= max_idle)
1989	/* we are allowed to idle, so do so without any timeout */
1990	X_COND_WAIT (reqwait, reqlock);
1991	else
1992	{
1993	/* initialise timeout once */
1994	if (!ts.tv_sec)
1995	ts.tv_sec = time (0) + idle_timeout;
1996
1997	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
1998	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
1999	}
2000
2001	--idle;
2002	}
2003
2004	--nready;
2005
2006	X_UNLOCK (reqlock);
2007
2008	if (req->type < 0)
2009	goto quit;
2010
2011	ETP_EXECUTE (self, req);
2012
2013	X_LOCK (reslock);
2014
2015	++npending;
2016
2017	if (!reqq_push (&res_queue, req) && want_poll_cb)
2018	want_poll_cb ();
2019
2020	self->req = 0;
2021	etp_worker_clear (self);
2022
2023	X_UNLOCK (reslock);
2024	}
2025
2026	quit:
2027	X_LOCK (wrklock);
2028	etp_worker_free (self);
2029	X_UNLOCK (wrklock);
2030
2031	return 0;
2032	}
2033
2034	/*****************************************************************************/	1729	/*****************************************************************************/
2035		1730
2036	int ecb_cold	1731	int ecb_cold
2037	eio_init (void (*want_poll)(void), void (*done_poll)(void))	1732	eio_init (void (*want_poll)(void), void (*done_poll)(void))
2038	{	1733	{
2039	#if !HAVE_PREADWRITE	1734	eio_want_poll_cb = want_poll;
2040	X_MUTEX_CREATE (preadwritelock);	1735	eio_done_poll_cb = done_poll;
2041	#endif
2042		1736
2043	return etp_init (want_poll, done_poll);	1737	return etp_init (EIO_POOL, 0, 0, 0);
2044	}	1738	}
2045		1739
2046	ecb_inline void	1740	ecb_inline void
2047	eio_api_destroy (eio_req *req)	1741	eio_api_destroy (eio_req *req)
2048	{	1742	{
2049	free (req);	1743	free (req);
2050	}	1744	}
2051		1745
2052	#define REQ(rtype) \	1746	#define REQ(rtype) \
2053	eio_req *req; \	1747	eio_req *req; \
2054	\	1748	\
2055	req = (eio_req *)calloc (1, sizeof *req); \	1749	req = (eio_req *)calloc (1, sizeof *req); \
2056	if (!req) \	1750	if (!req) \
2057	return 0; \	1751	return 0; \
…		…
2071	{ \	1765	{ \
2072	eio_api_destroy (req); \	1766	eio_api_destroy (req); \
2073	return 0; \	1767	return 0; \
2074	}	1768	}
2075		1769
		1770	#define SINGLEDOT(ptr) (0[(char *)(ptr)] == '.' && !1[(char *)(ptr)])
		1771
2076	static void	1772	static void
2077	eio_execute (etp_worker *self, eio_req *req)	1773	eio_execute (etp_worker *self, eio_req *req)
2078	{	1774	{
		1775	#if HAVE_AT
		1776	int dirfd;
		1777	#else
		1778	const char *path;
		1779	#endif
		1780
2079	if (ecb_expect_false (EIO_CANCELLED (req)))	1781	if (ecb_expect_false (EIO_CANCELLED (req)))
2080	{	1782	{
2081	req->result = -1;	1783	req->result = -1;
2082	req->errorno = ECANCELED;	1784	req->errorno = ECANCELED;
2083	return;	1785	return;
2084	}	1786	}
2085		1787
		1788	if (ecb_expect_false (req->wd == EIO_INVALID_WD))
		1789	{
		1790	req->result = -1;
		1791	req->errorno = ENOENT;
		1792	return;
		1793	}
		1794
		1795	if (req->type >= EIO_OPEN)
		1796	{
		1797	#if HAVE_AT
		1798	dirfd = WD2FD (req->wd);
		1799	#else
		1800	path = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
		1801	#endif
		1802	}
		1803
2086	switch (req->type)	1804	switch (req->type)
2087	{	1805	{
		1806	case EIO_WD_OPEN: req->wd = eio__wd_open_sync (&self->tmpbuf, req->wd, req->ptr1);
		1807	req->result = req->wd == EIO_INVALID_WD ? -1 : 0;
		1808	break;
		1809	case EIO_WD_CLOSE: req->result = 0;
		1810	eio_wd_close_sync (req->wd); break;
		1811
		1812	case EIO_SEEK: eio__lseek (req); break;
2088	case EIO_READ: ALLOC (req->size);	1813	case EIO_READ: ALLOC (req->size);
2089	req->result = req->offs >= 0	1814	req->result = req->offs >= 0
2090	? pread (req->int1, req->ptr2, req->size, req->offs)	1815	? pread (req->int1, req->ptr2, req->size, req->offs)
2091	: read (req->int1, req->ptr2, req->size); break;	1816	: read (req->int1, req->ptr2, req->size); break;
2092	case EIO_WRITE: req->result = req->offs >= 0	1817	case EIO_WRITE: req->result = req->offs >= 0
…		…
2094	: write (req->int1, req->ptr2, req->size); break;	1819	: write (req->int1, req->ptr2, req->size); break;
2095		1820
2096	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;	1821	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
2097	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break;	1822	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break;
2098		1823
		1824	#if HAVE_AT
		1825
2099	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1826	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2100	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;	1827	req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, 0); break;
2101	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1828	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1829	req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, AT_SYMLINK_NOFOLLOW); break;
		1830	case EIO_CHOWN: req->result = fchownat (dirfd, req->ptr1, req->int2, req->int3, 0); break;
		1831	case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break;
		1832	case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break;
		1833	case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break;
		1834
		1835	case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break;
		1836	case EIO_RMDIR: /* complications arise because "." cannot be removed, so we might have to expand */
		1837	req->result = req->wd && SINGLEDOT (req->ptr1)
		1838	? rmdir (req->wd->str)
		1839	: unlinkat (dirfd, req->ptr1, AT_REMOVEDIR); break;
		1840	case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break;
		1841	case EIO_RENAME: /* complications arise because "." cannot be renamed, so we might have to expand */
		1842	req->result = req->wd && SINGLEDOT (req->ptr1)
		1843	? rename (req->wd->str, req->ptr2)
		1844	: renameat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2); break;
		1845	case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break;
		1846	case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break;
		1847	case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
		1848	case EIO_READLINK: ALLOC (PATH_MAX);
		1849	req->result = readlinkat (dirfd, req->ptr1, req->ptr2, PATH_MAX); break;
		1850	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		1851	req->result = eio__statvfsat (dirfd, req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		1852	case EIO_UTIME:
		1853	case EIO_FUTIME:
		1854	{
		1855	struct timespec ts[2];
		1856	struct timespec *times;
		1857
		1858	if (req->nv1 != -1. || req->nv2 != -1.)
		1859	{
		1860	ts[0].tv_sec = req->nv1;
		1861	ts[0].tv_nsec = (req->nv1 - ts[0].tv_sec) * 1e9;
		1862	ts[1].tv_sec = req->nv2;
		1863	ts[1].tv_nsec = (req->nv2 - ts[1].tv_sec) * 1e9;
		1864
		1865	times = ts;
		1866	}
		1867	else
		1868	times = 0;
		1869
		1870	req->result = req->type == EIO_FUTIME
		1871	? futimens (req->int1, times)
		1872	: utimensat (dirfd, req->ptr1, times, 0);
		1873	}
		1874	break;
		1875
		1876	#else
		1877
		1878	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1879	req->result = stat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
		1880	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2102	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;	1881	req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break;
		1882	case EIO_CHOWN: req->result = chown (path , req->int2, req->int3); break;
		1883	case EIO_CHMOD: req->result = chmod (path , (mode_t)req->int2); break;
		1884	case EIO_TRUNCATE: req->result = truncate (path , req->offs); break;
		1885	case EIO_OPEN: req->result = open (path , req->int1, (mode_t)req->int2); break;
		1886
		1887	case EIO_UNLINK: req->result = unlink (path ); break;
		1888	case EIO_RMDIR: req->result = rmdir (path ); break;
		1889	case EIO_MKDIR: req->result = mkdir (path , (mode_t)req->int2); break;
		1890	case EIO_RENAME: req->result = rename (path , req->ptr2); break;
		1891	case EIO_LINK: req->result = link (path , req->ptr2); break;
		1892	case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break;
		1893	case EIO_MKNOD: req->result = mknod (path , (mode_t)req->int2, (dev_t)req->offs); break;
		1894	case EIO_READLINK: ALLOC (PATH_MAX);
		1895	req->result = readlink (path, req->ptr2, PATH_MAX); break;
		1896	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		1897	req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break;
		1898
		1899	case EIO_UTIME:
		1900	case EIO_FUTIME:
		1901	{
		1902	struct timeval tv[2];
		1903	struct timeval *times;
		1904
		1905	if (req->nv1 != -1. || req->nv2 != -1.)
		1906	{
		1907	tv[0].tv_sec = req->nv1;
		1908	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1e6;
		1909	tv[1].tv_sec = req->nv2;
		1910	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1e6;
		1911
		1912	times = tv;
		1913	}
		1914	else
		1915	times = 0;
		1916
		1917	req->result = req->type == EIO_FUTIME
		1918	? futimes (req->int1, times)
		1919	: utimes (req->ptr1, times);
		1920	}
		1921	break;
		1922
		1923	#endif
		1924
		1925	case EIO_REALPATH: if (0 <= (req->result = eio__realpath (&self->tmpbuf, req->wd, req->ptr1)))
		1926	{
		1927	ALLOC (req->result);
		1928	memcpy (req->ptr2, self->tmpbuf.ptr, req->result);
		1929	}
		1930	break;
		1931
2103	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1932	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2104	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;	1933	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
2105		1934
2106	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2107	req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
2108	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));	1935	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2109	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;	1936	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
2110		1937
2111	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
2112	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;	1938	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
2113	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
2114	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;	1939	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
2115	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
2116	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;	1940	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
2117		1941
2118	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
2119	case EIO_CLOSE: req->result = close (req->int1); break;	1942	case EIO_CLOSE: req->result = close (req->int1); break;
2120	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;	1943	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
2121	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
2122	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
2123	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
2124	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
2125	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
2126	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
2127	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
2128
2129	case EIO_REALPATH: eio__realpath (req, self); break;
2130
2131	case EIO_READLINK: ALLOC (PATH_MAX);
2132	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
2133
2134	case EIO_SYNC: req->result = 0; sync (); break;	1944	case EIO_SYNC: req->result = 0; sync (); break;
2135	case EIO_FSYNC: req->result = fsync (req->int1); break;	1945	case EIO_FSYNC: req->result = fsync (req->int1); break;
2136	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;	1946	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
2137	case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break;	1947	case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break;
2138	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;	1948	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
…		…
2157	req->result = select (0, 0, 0, 0, &tv);	1967	req->result = select (0, 0, 0, 0, &tv);
2158	}	1968	}
2159	#endif	1969	#endif
2160	break;	1970	break;
2161		1971
2162	case EIO_UTIME:	1972	#if 0
2163	case EIO_FUTIME:
2164	{
2165	struct timeval tv[2];
2166	struct timeval *times;
2167
2168	if (req->nv1 != -1. || req->nv2 != -1.)
2169	{
2170	tv[0].tv_sec = req->nv1;
2171	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
2172	tv[1].tv_sec = req->nv2;
2173	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
2174
2175	times = tv;
2176	}
2177	else
2178	times = 0;
2179
2180	req->result = req->type == EIO_FUTIME
2181	? futimes (req->int1, times)
2182	: utimes (req->ptr1, times);
2183	}
2184	break;
2185
2186	case EIO_GROUP:	1973	case EIO_GROUP:
2187	abort (); /* handled in eio_request */	1974	abort (); /* handled in eio_request */
		1975	#endif
2188		1976
2189	case EIO_NOP:	1977	case EIO_NOP:
2190	req->result = 0;	1978	req->result = 0;
2191	break;	1979	break;
2192		1980
2193	case EIO_CUSTOM:	1981	case EIO_CUSTOM:
2194	req->feed (req);	1982	req->feed (req);
2195	break;	1983	break;
2196		1984
2197	default:	1985	default:
2198	errno = ENOSYS;
2199	req->result = -1;	1986	req->result = EIO_ENOSYS ();
2200	break;	1987	break;
2201	}	1988	}
2202		1989
2203	req->errorno = errno;	1990	req->errorno = errno;
2204	}	1991	}
2205		1992
2206	#ifndef EIO_NO_WRAPPERS	1993	#ifndef EIO_NO_WRAPPERS
2207		1994
		1995	eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data)
		1996	{
		1997	REQ (EIO_WD_OPEN); PATH; SEND;
		1998	}
		1999
		2000	eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data)
		2001	{
		2002	REQ (EIO_WD_CLOSE); req->wd = wd; SEND;
		2003	}
		2004
2208	eio_req *eio_nop (int pri, eio_cb cb, void *data)	2005	eio_req *eio_nop (int pri, eio_cb cb, void *data)
2209	{	2006	{
2210	REQ (EIO_NOP); SEND;	2007	REQ (EIO_NOP); SEND;
2211	}	2008	}
2212		2009
…		…
2271	}	2068	}
2272		2069
2273	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)	2070	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
2274	{	2071	{
2275	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;	2072	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
		2073	}
		2074
		2075	eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data)
		2076	{
		2077	REQ (EIO_SEEK); req->int1 = fd; req->offs = offset; req->int2 = whence; SEND;
2276	}	2078	}
2277		2079
2278	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)	2080	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
2279	{	2081	{
2280	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;	2082	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
…		…
2478	void	2280	void
2479	eio_grp_add (eio_req *grp, eio_req *req)	2281	eio_grp_add (eio_req *grp, eio_req *req)
2480	{	2282	{
2481	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2283	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
2482		2284
2483	grp->flags |= EIO_FLAG_GROUPADD;	2285	grp->flags |= ETP_FLAG_GROUPADD;
2484		2286
2485	++grp->size;	2287	++grp->size;
2486	req->grp = grp;	2288	req->grp = grp;
2487		2289
2488	req->grp_prev = 0;	2290	req->grp_prev = 0;

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