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Comparing libeio/eio.c (file contents):
Revision 1.95 by root, Tue Jul 19 04:56:43 2011 UTC vs.
Revision 1.139 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,
…		…
43		43
44	#include "eio.h"	44	#include "eio.h"
45	#include "ecb.h"	45	#include "ecb.h"
46		46
47	#ifdef EIO_STACKSIZE	47	#ifdef EIO_STACKSIZE
48	# define XTHREAD_STACKSIZE EIO_STACKSIZE	48	# define X_STACKSIZE EIO_STACKSIZE
49	#endif	49	#endif
50	#include "xthread.h"	50	#include "xthread.h"
51		51
52	#include <errno.h>	52	#include <errno.h>
53	#include <stddef.h>	53	#include <stddef.h>
…		…
105	#ifdef _WIN32	105	#ifdef _WIN32
106		106
107	#undef PAGESIZE	107	#undef PAGESIZE
108	#define PAGESIZE 4096 /* GetSystemInfo? */	108	#define PAGESIZE 4096 /* GetSystemInfo? */
109		109
		110	/* TODO: look at how perl does stat (non-sloppy), unlink (ro-files), utime, link */
		111
110	#ifdef EIO_STRUCT_STATI64	112	#ifdef EIO_STRUCT_STATI64
		113	/* look at perl's non-sloppy stat */
111	#define stat(path,buf) _stati64 (path,buf)	114	#define stat(path,buf) _stati64 (path,buf)
112	#define fstat(fd,buf) _fstati64 (fd,buf)	115	#define fstat(fd,buf) _fstati64 (fd,buf)
113	#endif	116	#endif
114	#define lstat(path,buf) stat (path,buf)	117	#define lstat(path,buf) stat (path,buf)
115	#define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))	118	#define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
…		…
117	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))	120	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
118		121
119	#define chmod(path,mode) _chmod (path, mode)	122	#define chmod(path,mode) _chmod (path, mode)
120	#define dup(fd) _dup (fd)	123	#define dup(fd) _dup (fd)
121	#define dup2(fd1,fd2) _dup2 (fd1, fd2)	124	#define dup2(fd1,fd2) _dup2 (fd1, fd2)
		125	#define pipe(fds) _pipe (fds, 4096, O_BINARY)
122		126
123	#define fchmod(fd,mode) EIO_ENOSYS ()	127	#define fchmod(fd,mode) EIO_ENOSYS ()
124	#define chown(path,uid,gid) EIO_ENOSYS ()	128	#define chown(path,uid,gid) EIO_ENOSYS ()
125	#define fchown(fd,uid,gid) EIO_ENOSYS ()	129	#define fchown(fd,uid,gid) EIO_ENOSYS ()
126	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */	130	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
…		…
129	#define sync() EIO_ENOSYS ()	133	#define sync() EIO_ENOSYS ()
130	#define readlink(path,buf,s) EIO_ENOSYS ()	134	#define readlink(path,buf,s) EIO_ENOSYS ()
131	#define statvfs(path,buf) EIO_ENOSYS ()	135	#define statvfs(path,buf) EIO_ENOSYS ()
132	#define fstatvfs(fd,buf) EIO_ENOSYS ()	136	#define fstatvfs(fd,buf) EIO_ENOSYS ()
133		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	}
		172
		173	/* rename() uses MoveFile, which fails to overwrite */
		174	#define rename(old,neu) eio__rename (old, neu)
		175
		176	static int
		177	eio__rename (const char *old, const char *neu)
		178	{
		179	if (MoveFileEx (old, neu, MOVEFILE_REPLACE_EXISTING))
		180	return 0;
		181
		182	/* should steal _dosmaperr */
		183	switch (GetLastError ())
		184	{
		185	case ERROR_FILE_NOT_FOUND:
		186	case ERROR_PATH_NOT_FOUND:
		187	case ERROR_INVALID_DRIVE:
		188	case ERROR_NO_MORE_FILES:
		189	case ERROR_BAD_NETPATH:
		190	case ERROR_BAD_NET_NAME:
		191	case ERROR_BAD_PATHNAME:
		192	case ERROR_FILENAME_EXCED_RANGE:
		193	errno = ENOENT;
		194	break;
		195
		196	default:
		197	errno = EACCES;
		198	break;
		199	}
		200
		201	return -1;
		202	}
		203
134	/* we could even stat and see if it exists */	204	/* we could even stat and see if it exists */
135	static int	205	static int
136	symlink (const char *old, const char *neu)	206	symlink (const char *old, const char *neu)
137	{	207	{
138	#if WINVER >= 0x0600	208	#if WINVER >= 0x0600
…		…
144	#endif	214	#endif
145		215
146	return EIO_ERRNO (ENOENT, -1);	216	return EIO_ERRNO (ENOENT, -1);
147	}	217	}
148		218
149	/* POSIX API only */	219	/* POSIX API only, causing trouble for win32 apps */
150	#define CreateHardLink(neu,old,flags) 0	220	#define CreateHardLink(neu,old,flags) 0 /* not really creating hardlink, still using relative paths? */
151	#define CreateSymbolicLink(neu,old,flags) 0	221	#define CreateSymbolicLink(neu,old,flags) 0 /* vista+ only */
152		222
153	struct statvfs	223	struct statvfs
154	{	224	{
155	int dummy;	225	int dummy;
156	};	226	};
…		…
162		232
163	#else	233	#else
164		234
165	#include <sys/time.h>	235	#include <sys/time.h>
166	#include <sys/select.h>	236	#include <sys/select.h>
167	#include <sys/statvfs.h>
168	#include <unistd.h>	237	#include <unistd.h>
169	#include <utime.h>
170	#include <signal.h>	238	#include <signal.h>
171	#include <dirent.h>	239	#include <dirent.h>
		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
172		249
173	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES	250	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
174	#include <sys/mman.h>	251	#include <sys/mman.h>
175	#endif	252	#endif
176		253
177	#define D_NAME(entp) entp->d_name	254	#define D_NAME(entp) entp->d_name
178		255
179	/* 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 */
180	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__	257	#if __FreeBSD__ || __NetBSD__ || __OpenBSD__
181	#define _DIRENT_HAVE_D_TYPE /* sigh */	258	#define _DIRENT_HAVE_D_TYPE /* sigh */
182	#define D_INO(de) (de)->d_fileno	259	#define D_INO(de) (de)->d_fileno
183	#define D_NAMLEN(de) (de)->d_namlen	260	#define D_NAMLEN(de) (de)->d_namlen
184	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600	261	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
185	#define D_INO(de) (de)->d_ino	262	#define D_INO(de) (de)->d_ino
…		…
196		273
197	#ifndef EIO_STRUCT_DIRENT	274	#ifndef EIO_STRUCT_DIRENT
198	#define EIO_STRUCT_DIRENT struct dirent	275	#define EIO_STRUCT_DIRENT struct dirent
199	#endif	276	#endif
200		277
		278	#endif
		279
		280	#if HAVE_UTIMES
		281	# include <utime.h>
		282	#endif
		283
		284	#if HAVE_SYS_SYSCALL_H
		285	# include <sys/syscall.h>
		286	#endif
		287
		288	#if HAVE_SYS_PRCTL_H
		289	# include <sys/prctl.h>
201	#endif	290	#endif
202		291
203	#if HAVE_SENDFILE	292	#if HAVE_SENDFILE
204	# if __linux	293	# if __linux
205	# include <sys/sendfile.h>	294	# include <sys/sendfile.h>
…		…
236	#endif	325	#endif
237		326
238	/* buffer size for various temporary buffers */	327	/* buffer size for various temporary buffers */
239	#define EIO_BUFSIZE 65536	328	#define EIO_BUFSIZE 65536
240		329
241	#define dBUF \	330	#define dBUF \
242	char *eio_buf = malloc (EIO_BUFSIZE); \	331	char *eio_buf = malloc (EIO_BUFSIZE); \
243	errno = ENOMEM; \	332	errno = ENOMEM; \
244	if (!eio_buf) \	333	if (!eio_buf) \
245	return -1	334	return -1
246		335
247	#define FUBd \	336	#define FUBd \
248	free (eio_buf)	337	free (eio_buf)
249		338
250	#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	/*****************************************************************************/
251		364
252	#define ETP_PRI_MIN EIO_PRI_MIN	365	#define ETP_PRI_MIN EIO_PRI_MIN
253	#define ETP_PRI_MAX EIO_PRI_MAX	366	#define ETP_PRI_MAX EIO_PRI_MAX
254		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
255	struct etp_worker;	378	struct etp_worker;
256
257	#define ETP_REQ eio_req	379	#define ETP_REQ eio_req
258	#define ETP_DESTROY(req) eio_destroy (req)	380	#define ETP_DESTROY(req) eio_destroy (req)
259	static int eio_finish (eio_req *req);	381	static int eio_finish (eio_req *req);
260	#define ETP_FINISH(req) eio_finish (req)	382	#define ETP_FINISH(req) eio_finish (req)
261	static void eio_execute (struct etp_worker *self, eio_req *req);	383	static void eio_execute (struct etp_worker *self, eio_req *req);
262	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)	384	#define ETP_EXECUTE(wrk,req) eio_execute (wrk, req)
263		385
264	/*****************************************************************************/	386	#include "etp.c"
265		387
266	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)	388	static struct etp_pool eio_pool;
267		389	#define EIO_POOL (&eio_pool)
268	/* calculate time difference in ~1/EIO_TICKS of a second */
269	ecb_inline int
270	tvdiff (struct timeval *tv1, struct timeval *tv2)
271	{
272	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
273	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
274	}
275
276	static unsigned int started, idle, wanted = 4;
277
278	static void (*want_poll_cb) (void);
279	static void (*done_poll_cb) (void);
280
281	static unsigned int max_poll_time; /* reslock */
282	static unsigned int max_poll_reqs; /* reslock */
283
284	static volatile unsigned int nreqs; /* reqlock */
285	static volatile unsigned int nready; /* reqlock */
286	static volatile unsigned int npending; /* reqlock */
287	static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
288	static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
289
290	static xmutex_t wrklock;
291	static xmutex_t reslock;
292	static xmutex_t reqlock;
293	static xcond_t reqwait;
294
295	#if !HAVE_PREADWRITE
296	/*
297	* make our pread/pwrite emulation safe against themselves, but not against
298	* normal read/write by using a mutex. slows down execution a lot,
299	* but that's your problem, not mine.
300	*/
301	static xmutex_t preadwritelock;
302	#endif
303
304	typedef struct etp_worker
305	{
306	/* locked by wrklock */
307	struct etp_worker *prev, *next;
308
309	xthread_t tid;
310
311	/* locked by reslock, reqlock or wrklock */
312	ETP_REQ *req; /* currently processed request */
313
314	#ifdef ETP_WORKER_COMMON
315	ETP_WORKER_COMMON
316	#endif
317	} etp_worker;
318
319	static etp_worker wrk_first; /* NOT etp */
320
321	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
322	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
323
324	/* worker threads management */
325
326	static void ecb_cold
327	etp_worker_clear (etp_worker *wrk)
328	{
329	}
330
331	static void ecb_cold
332	etp_worker_free (etp_worker *wrk)
333	{
334	wrk->next->prev = wrk->prev;
335	wrk->prev->next = wrk->next;
336
337	free (wrk);
338	}
339
340	static unsigned int
341	etp_nreqs (void)
342	{
343	int retval;
344	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
345	retval = nreqs;
346	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
347	return retval;
348	}
349
350	static unsigned int
351	etp_nready (void)
352	{
353	unsigned int retval;
354
355	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
356	retval = nready;
357	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
358
359	return retval;
360	}
361
362	static unsigned int
363	etp_npending (void)
364	{
365	unsigned int retval;
366
367	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
368	retval = npending;
369	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
370
371	return retval;
372	}
373
374	static unsigned int
375	etp_nthreads (void)
376	{
377	unsigned int retval;
378
379	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
380	retval = started;
381	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
382
383	return retval;
384	}
385
386	/*
387	* a somewhat faster data structure might be nice, but
388	* with 8 priorities this actually needs <20 insns
389	* per shift, the most expensive operation.
390	*/
391	typedef struct {
392	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
393	int size;
394	} etp_reqq;
395
396	static etp_reqq req_queue;
397	static etp_reqq res_queue;
398
399	static void ecb_noinline ecb_cold
400	reqq_init (etp_reqq *q)
401	{
402	int pri;
403
404	for (pri = 0; pri < ETP_NUM_PRI; ++pri)
405	q->qs[pri] = q->qe[pri] = 0;
406
407	q->size = 0;
408	}
409
410	static int ecb_noinline
411	reqq_push (etp_reqq *q, ETP_REQ *req)
412	{
413	int pri = req->pri;
414	req->next = 0;
415
416	if (q->qe[pri])
417	{
418	q->qe[pri]->next = req;
419	q->qe[pri] = req;
420	}
421	else
422	q->qe[pri] = q->qs[pri] = req;
423
424	return q->size++;
425	}
426
427	static ETP_REQ * ecb_noinline
428	reqq_shift (etp_reqq *q)
429	{
430	int pri;
431
432	if (!q->size)
433	return 0;
434
435	--q->size;
436
437	for (pri = ETP_NUM_PRI; pri--; )
438	{
439	eio_req *req = q->qs[pri];
440
441	if (req)
442	{
443	if (!(q->qs[pri] = (eio_req *)req->next))
444	q->qe[pri] = 0;
445
446	return req;
447	}
448	}
449
450	abort ();
451	}
452
453	static int ecb_cold
454	etp_init (void (*want_poll)(void), void (*done_poll)(void))
455	{
456	X_MUTEX_CREATE (wrklock);
457	X_MUTEX_CREATE (reslock);
458	X_MUTEX_CREATE (reqlock);
459	X_COND_CREATE (reqwait);
460
461	reqq_init (&req_queue);
462	reqq_init (&res_queue);
463
464	wrk_first.next =
465	wrk_first.prev = &wrk_first;
466
467	started = 0;
468	idle = 0;
469	nreqs = 0;
470	nready = 0;
471	npending = 0;
472
473	want_poll_cb = want_poll;
474	done_poll_cb = done_poll;
475
476	return 0;
477	}
478
479	X_THREAD_PROC (etp_proc);
480
481	static void ecb_cold
482	etp_start_thread (void)
483	{
484	etp_worker *wrk = calloc (1, sizeof (etp_worker));
485
486	/*TODO*/
487	assert (("unable to allocate worker thread data", wrk));
488
489	X_LOCK (wrklock);
490
491	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
492	{
493	wrk->prev = &wrk_first;
494	wrk->next = wrk_first.next;
495	wrk_first.next->prev = wrk;
496	wrk_first.next = wrk;
497	++started;
498	}
499	else
500	free (wrk);
501
502	X_UNLOCK (wrklock);
503	}
504
505	static void
506	etp_maybe_start_thread (void)
507	{
508	if (ecb_expect_true (etp_nthreads () >= wanted))
509	return;
510
511	/* todo: maybe use idle here, but might be less exact */
512	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
513	return;
514
515	etp_start_thread ();
516	}
517
518	static void ecb_cold
519	etp_end_thread (void)
520	{
521	eio_req *req = calloc (1, sizeof (eio_req));
522
523	req->type = -1;
524	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
525
526	X_LOCK (reqlock);
527	reqq_push (&req_queue, req);
528	X_COND_SIGNAL (reqwait);
529	X_UNLOCK (reqlock);
530
531	X_LOCK (wrklock);
532	--started;
533	X_UNLOCK (wrklock);
534	}
535
536	static int
537	etp_poll (void)
538	{
539	unsigned int maxreqs;
540	unsigned int maxtime;
541	struct timeval tv_start, tv_now;
542
543	X_LOCK (reslock);
544	maxreqs = max_poll_reqs;
545	maxtime = max_poll_time;
546	X_UNLOCK (reslock);
547
548	if (maxtime)
549	gettimeofday (&tv_start, 0);
550
551	for (;;)
552	{
553	ETP_REQ *req;
554
555	etp_maybe_start_thread ();
556
557	X_LOCK (reslock);
558	req = reqq_shift (&res_queue);
559
560	if (req)
561	{
562	--npending;
563
564	if (!res_queue.size && done_poll_cb)
565	done_poll_cb ();
566	}
567
568	X_UNLOCK (reslock);
569
570	if (!req)
571	return 0;
572
573	X_LOCK (reqlock);
574	--nreqs;
575	X_UNLOCK (reqlock);
576
577	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
578	{
579	req->int1 = 1; /* mark request as delayed */
580	continue;
581	}
582	else
583	{
584	int res = ETP_FINISH (req);
585	if (ecb_expect_false (res))
586	return res;
587	}
588
589	if (ecb_expect_false (maxreqs && !--maxreqs))
590	break;
591
592	if (maxtime)
593	{
594	gettimeofday (&tv_now, 0);
595
596	if (tvdiff (&tv_start, &tv_now) >= maxtime)
597	break;
598	}
599	}
600
601	errno = EAGAIN;
602	return -1;
603	}
604
605	static void
606	etp_cancel (ETP_REQ *req)
607	{
608	req->cancelled = 1;
609
610	eio_grp_cancel (req);
611	}
612
613	static void
614	etp_submit (ETP_REQ *req)
615	{
616	req->pri -= ETP_PRI_MIN;
617
618	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
619	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
620
621	if (ecb_expect_false (req->type == EIO_GROUP))
622	{
623	/* I hope this is worth it :/ */
624	X_LOCK (reqlock);
625	++nreqs;
626	X_UNLOCK (reqlock);
627
628	X_LOCK (reslock);
629
630	++npending;
631
632	if (!reqq_push (&res_queue, req) && want_poll_cb)
633	want_poll_cb ();
634
635	X_UNLOCK (reslock);
636	}
637	else
638	{
639	X_LOCK (reqlock);
640	++nreqs;
641	++nready;
642	reqq_push (&req_queue, req);
643	X_COND_SIGNAL (reqwait);
644	X_UNLOCK (reqlock);
645
646	etp_maybe_start_thread ();
647	}
648	}
649
650	static void ecb_cold
651	etp_set_max_poll_time (double nseconds)
652	{
653	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
654	max_poll_time = nseconds * EIO_TICKS;
655	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
656	}
657
658	static void ecb_cold
659	etp_set_max_poll_reqs (unsigned int maxreqs)
660	{
661	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
662	max_poll_reqs = maxreqs;
663	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
664	}
665
666	static void ecb_cold
667	etp_set_max_idle (unsigned int nthreads)
668	{
669	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
670	max_idle = nthreads;
671	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
672	}
673
674	static void ecb_cold
675	etp_set_idle_timeout (unsigned int seconds)
676	{
677	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
678	idle_timeout = seconds;
679	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
680	}
681
682	static void ecb_cold
683	etp_set_min_parallel (unsigned int nthreads)
684	{
685	if (wanted < nthreads)
686	wanted = nthreads;
687	}
688
689	static void ecb_cold
690	etp_set_max_parallel (unsigned int nthreads)
691	{
692	if (wanted > nthreads)
693	wanted = nthreads;
694
695	while (started > wanted)
696	etp_end_thread ();
697	}
698		390
699	/*****************************************************************************/	391	/*****************************************************************************/
700		392
701	static void	393	static void
702	grp_try_feed (eio_req *grp)	394	grp_try_feed (eio_req *grp)
703	{	395	{
704	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	396	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
705	{	397	{
706	grp->flags &= ~EIO_FLAG_GROUPADD;	398	grp->flags &= ~ETP_FLAG_GROUPADD;
707		399
708	EIO_FEED (grp);	400	EIO_FEED (grp);
709		401
710	/* stop if no progress has been made */	402	/* stop if no progress has been made */
711	if (!(grp->flags & EIO_FLAG_GROUPADD))	403	if (!(grp->flags & ETP_FLAG_GROUPADD))
712	{	404	{
713	grp->feed = 0;	405	grp->feed = 0;
714	break;	406	break;
715	}	407	}
716	}	408	}
…		…
723		415
724	/* call feeder, if applicable */	416	/* call feeder, if applicable */
725	grp_try_feed (grp);	417	grp_try_feed (grp);
726		418
727	/* finish, if done */	419	/* finish, if done */
728	if (!grp->size && grp->int1)	420	if (!grp->size && grp->flags & ETP_FLAG_DELAYED)
729	return eio_finish (grp);	421	return eio_finish (grp);
730	else	422	else
731	return 0;	423	return 0;
732	}	424	}
733		425
…		…
769	}	461	}
770		462
771	void	463	void
772	eio_grp_cancel (eio_req *grp)	464	eio_grp_cancel (eio_req *grp)
773	{	465	{
774	for (grp = grp->grp_first; grp; grp = grp->grp_next)	466	etp_grp_cancel (EIO_POOL, grp);
775	eio_cancel (grp);
776	}	467	}
777		468
778	void	469	void
779	eio_cancel (eio_req *req)	470	eio_cancel (eio_req *req)
780	{	471	{
781	etp_cancel (req);	472	etp_cancel (EIO_POOL, req);
782	}	473	}
783		474
784	void	475	void
785	eio_submit (eio_req *req)	476	eio_submit (eio_req *req)
786	{	477	{
787	etp_submit (req);	478	etp_submit (EIO_POOL, req);
788	}	479	}
789		480
790	unsigned int	481	unsigned int
791	eio_nreqs (void)	482	eio_nreqs (void)
792	{	483	{
793	return etp_nreqs ();	484	return etp_nreqs (EIO_POOL);
794	}	485	}
795		486
796	unsigned int	487	unsigned int
797	eio_nready (void)	488	eio_nready (void)
798	{	489	{
799	return etp_nready ();	490	return etp_nready (EIO_POOL);
800	}	491	}
801		492
802	unsigned int	493	unsigned int
803	eio_npending (void)	494	eio_npending (void)
804	{	495	{
805	return etp_npending ();	496	return etp_npending (EIO_POOL);
806	}	497	}
807		498
808	unsigned int ecb_cold	499	unsigned int ecb_cold
809	eio_nthreads (void)	500	eio_nthreads (void)
810	{	501	{
811	return etp_nthreads ();	502	return etp_nthreads (EIO_POOL);
812	}	503	}
813		504
814	void ecb_cold	505	void ecb_cold
815	eio_set_max_poll_time (double nseconds)	506	eio_set_max_poll_time (double nseconds)
816	{	507	{
817	etp_set_max_poll_time (nseconds);	508	etp_set_max_poll_time (EIO_POOL, nseconds);
818	}	509	}
819		510
820	void ecb_cold	511	void ecb_cold
821	eio_set_max_poll_reqs (unsigned int maxreqs)	512	eio_set_max_poll_reqs (unsigned int maxreqs)
822	{	513	{
823	etp_set_max_poll_reqs (maxreqs);	514	etp_set_max_poll_reqs (EIO_POOL, maxreqs);
824	}	515	}
825		516
826	void ecb_cold	517	void ecb_cold
827	eio_set_max_idle (unsigned int nthreads)	518	eio_set_max_idle (unsigned int nthreads)
828	{	519	{
829	etp_set_max_idle (nthreads);	520	etp_set_max_idle (EIO_POOL, nthreads);
830	}	521	}
831		522
832	void ecb_cold	523	void ecb_cold
833	eio_set_idle_timeout (unsigned int seconds)	524	eio_set_idle_timeout (unsigned int seconds)
834	{	525	{
835	etp_set_idle_timeout (seconds);	526	etp_set_idle_timeout (EIO_POOL, seconds);
836	}	527	}
837		528
838	void ecb_cold	529	void ecb_cold
839	eio_set_min_parallel (unsigned int nthreads)	530	eio_set_min_parallel (unsigned int nthreads)
840	{	531	{
841	etp_set_min_parallel (nthreads);	532	etp_set_min_parallel (EIO_POOL, nthreads);
842	}	533	}
843		534
844	void ecb_cold	535	void ecb_cold
845	eio_set_max_parallel (unsigned int nthreads)	536	eio_set_max_parallel (unsigned int nthreads)
846	{	537	{
847	etp_set_max_parallel (nthreads);	538	etp_set_max_parallel (EIO_POOL, nthreads);
848	}	539	}
849		540
850	int eio_poll (void)	541	int eio_poll (void)
851	{	542	{
852	return etp_poll ();	543	return etp_poll (EIO_POOL);
853	}	544	}
854		545
855	/*****************************************************************************/	546	/*****************************************************************************/
856	/* work around various missing functions */	547	/* work around various missing functions */
857
858	#if !HAVE_PREADWRITE
859	# undef pread
860	# undef pwrite
861	# define pread eio__pread
862	# define pwrite eio__pwrite
863
864	static eio_ssize_t
865	eio__pread (int fd, void *buf, size_t count, off_t offset)
866	{
867	eio_ssize_t res;
868	off_t ooffset;
869
870	X_LOCK (preadwritelock);
871	ooffset = lseek (fd, 0, SEEK_CUR);
872	lseek (fd, offset, SEEK_SET);
873	res = read (fd, buf, count);
874	lseek (fd, ooffset, SEEK_SET);
875	X_UNLOCK (preadwritelock);
876
877	return res;
878	}
879
880	static eio_ssize_t
881	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
882	{
883	eio_ssize_t res;
884	off_t ooffset;
885
886	X_LOCK (preadwritelock);
887	ooffset = lseek (fd, 0, SEEK_CUR);
888	lseek (fd, offset, SEEK_SET);
889	res = write (fd, buf, count);
890	lseek (fd, ooffset, SEEK_SET);
891	X_UNLOCK (preadwritelock);
892
893	return res;
894	}
895	#endif
896		548
897	#ifndef HAVE_UTIMES	549	#ifndef HAVE_UTIMES
898		550
899	# undef utimes	551	# undef utimes
900	# define utimes(path,times) eio__utimes (path, times)	552	# define utimes(path,times) eio__utimes (path, times)
…		…
933		585
934	#if !HAVE_FDATASYNC	586	#if !HAVE_FDATASYNC
935	# undef fdatasync	587	# undef fdatasync
936	# define fdatasync(fd) fsync (fd)	588	# define fdatasync(fd) fsync (fd)
937	#endif	589	#endif
		590
		591	static int
		592	eio__syncfs (int fd)
		593	{
		594	int res;
		595
		596	#if HAVE_SYS_SYNCFS
		597	res = (int)syscall (__NR_syncfs, (int)(fd));
		598	#else
		599	res = EIO_ENOSYS ();
		600	#endif
		601
		602	if (res < 0 && errno == ENOSYS && fd >= 0)
		603	sync ();
		604
		605	return res;
		606	}
938		607
939	/* sync_file_range always needs emulation */	608	/* sync_file_range always needs emulation */
940	static int	609	static int
941	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)	610	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
942	{	611	{
…		…
965	}	634	}
966		635
967	static int	636	static int
968	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)
969	{	638	{
970	#if HAVE_FALLOCATE	639	#if HAVE_LINUX_FALLOCATE
971	return fallocate (fd, mode, offset, len);	640	return fallocate (fd, mode, offset, len);
972	#else	641	#else
973	errno = ENOSYS;	642	return EIO_ENOSYS ();
974	return -1;
975	#endif	643	#endif
976	}	644	}
977		645
978	#if !HAVE_READAHEAD	646	#if !HAVE_READAHEAD
979	# undef readahead	647	# undef readahead
…		…
994	todo -= len;	662	todo -= len;
995	}	663	}
996		664
997	FUBd;	665	FUBd;
998		666
999	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 */
1000	return count;	669	return 0;
1001	}	670	}
1002		671
1003	#endif	672	#endif
1004		673
1005	/* sendfile always needs emulation */	674	/* sendfile always needs emulation */
…		…
1040		709
1041	/* according to source inspection, this is correct, and useful behaviour */	710	/* according to source inspection, this is correct, and useful behaviour */
1042	if (sbytes)	711	if (sbytes)
1043	res = sbytes;	712	res = sbytes;
1044		713
1045	# elif defined (__APPLE__)	714	# elif defined __APPLE__
1046	off_t sbytes = count;	715	off_t sbytes = count;
1047	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);	716	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
1048		717
1049	/* according to the manpage, sbytes is always valid */	718	/* according to the manpage, sbytes is always valid */
1050	if (sbytes)	719	if (sbytes)
…		…
1077	HANDLE h = TO_SOCKET (ifd);	746	HANDLE h = TO_SOCKET (ifd);
1078	SetFilePointer (h, offset, 0, FILE_BEGIN);	747	SetFilePointer (h, offset, 0, FILE_BEGIN);
1079	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);	748	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
1080		749
1081	#else	750	#else
1082	res = -1;	751	res = EIO_ENOSYS ();
1083	errno = ENOSYS;
1084	#endif	752	#endif
1085		753
1086	/* we assume sendfile can copy at least 128mb in one go */	754	/* we assume sendfile can copy at least 128mb in one go */
1087	if (res <= 128 * 1024 * 1024)	755	if (res <= 128 * 1024 * 1024)
1088	{	756	{
…		…
1275		943
1276	/*****************************************************************************/	944	/*****************************************************************************/
1277	/* requests implemented outside eio_execute, because they are so large */	945	/* requests implemented outside eio_execute, because they are so large */
1278		946
1279	static void	947	static void
1280	eio__realpath (eio_req *req, etp_worker *self)	948	eio__lseek (eio_req *req)
1281	{	949	{
1282	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	{
1283	char *res;	965	char *res;
		966	const char *rel = path;
1284	char *tmp1, *tmp2;	967	char *tmp1, *tmp2;
1285	#if SYMLOOP_MAX > 32	968	#if SYMLOOP_MAX > 32
1286	int symlinks = SYMLOOP_MAX;	969	int symlinks = SYMLOOP_MAX;
1287	#else	970	#else
1288	int symlinks = 32;	971	int symlinks = 32;
1289	#endif	972	#endif
1290		973
1291	req->result = -1;
1292
1293	errno = EINVAL;	974	errno = EINVAL;
1294	if (!rel)	975	if (!rel)
1295	return;	976	return -1;
1296		977
1297	errno = ENOENT;	978	errno = ENOENT;
1298	if (!*rel)	979	if (!*rel)
1299	return;	980	return -1;
1300		981
1301	if (!req->ptr2)	982	res = etp_tmpbuf_get (tmpbuf, PATH_MAX * 3);
1302	{	983	#ifdef _WIN32
1303	X_LOCK (wrklock);	984	if (_access (rel, 4) != 0)
1304	req->flags |= EIO_FLAG_PTR2_FREE;
1305	X_UNLOCK (wrklock);
1306	req->ptr2 = malloc (PATH_MAX * 3);
1307
1308	errno = ENOMEM;
1309	if (!req->ptr2)
1310	return;	985	return -1;
1311	}
1312		986
1313	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
1314	tmp1 = res + PATH_MAX;	1000	tmp1 = res + PATH_MAX;
1315	tmp2 = tmp1 + PATH_MAX;	1001	tmp2 = tmp1 + PATH_MAX;
1316		1002
1317	#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 */
1318	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)	1004	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
…		…
1322		1008
1323	if (fd >= 0)	1009	if (fd >= 0)
1324	{	1010	{
1325	sprintf (tmp1, "/proc/self/fd/%d", fd);	1011	sprintf (tmp1, "/proc/self/fd/%d", fd);
1326	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 */
1327	close (fd);	1014	close (fd);
1328
1329	/* here we should probably stat the open file and the disk file, to make sure they still match */
1330		1015
1331	if (req->result > 0)	1016	if (req->result > 0)
1332	goto done;	1017	goto done;
1333	}	1018	}
1334	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)
1335	return;	1020	return -1;
1336	}	1021	}
1337	#endif	1022	#endif
1338	#endif	1023	#endif
1339		1024
1340	if (*rel != '/')	1025	if (*rel != '/')
1341	{	1026	{
		1027	int len;
		1028
		1029	errno = ENOENT;
		1030	if (wd == EIO_INVALID_WD)
		1031	return -1;
		1032
		1033	if (wd == EIO_CWD)
		1034	{
1342	if (!getcwd (res, PATH_MAX))	1035	if (!getcwd (res, PATH_MAX))
1343	return;	1036	return -1;
		1037
		1038	len = strlen (res);
		1039	}
		1040	else
		1041	memcpy (res, wd->str, len = wd->len);
1344		1042
1345	if (res [1]) /* only use if not / */	1043	if (res [1]) /* only use if not / */
1346	res += strlen (res);	1044	res += len;
1347	}	1045	}
1348		1046
1349	while (*rel)	1047	while (*rel)
1350	{	1048	{
1351	eio_ssize_t len, linklen;	1049	eio_ssize_t len, linklen;
1352	char *beg = rel;	1050	const char *beg = rel;
1353		1051
1354	while (*rel && *rel != '/')	1052	while (*rel && *rel != '/')
1355	++rel;	1053	++rel;
1356		1054
1357	len = rel - beg;	1055	len = rel - beg;
…		…
1369		1067
1370	if (beg [1] == '.' && len == 2)	1068	if (beg [1] == '.' && len == 2)
1371	{	1069	{
1372	/* .. - back up one component, if possible */	1070	/* .. - back up one component, if possible */
1373		1071
1374	while (res != req->ptr2)	1072	while (res != tmpbuf->ptr)
1375	if (*--res == '/')	1073	if (*--res == '/')
1376	break;	1074	break;
1377		1075
1378	continue;	1076	continue;
1379	}	1077	}
1380	}	1078	}
1381		1079
1382	errno = ENAMETOOLONG;	1080	errno = ENAMETOOLONG;
1383	if (res + 1 + len + 1 >= tmp1)	1081	if (res + 1 + len + 1 >= tmp1)
1384	return;	1082	return -1;
1385		1083
1386	/* copy one component */	1084	/* copy one component */
1387	*res = '/';	1085	*res = '/';
1388	memcpy (res + 1, beg, len);	1086	memcpy (res + 1, beg, len);
1389		1087
1390	/* zero-terminate, for readlink */	1088	/* zero-terminate, for readlink */
1391	res [len + 1] = 0;	1089	res [len + 1] = 0;
1392		1090
1393	/* now check if it's a symlink */	1091	/* now check if it's a symlink */
1394	linklen = readlink (req->ptr2, tmp1, PATH_MAX);	1092	linklen = readlink (tmpbuf->ptr, tmp1, PATH_MAX);
1395		1093
1396	if (linklen < 0)	1094	if (linklen < 0)
1397	{	1095	{
1398	if (errno != EINVAL)	1096	if (errno != EINVAL)
1399	return;	1097	return -1;
1400		1098
1401	/* it's a normal directory. hopefully */	1099	/* it's a normal directory. hopefully */
1402	res += len + 1;	1100	res += len + 1;
1403	}	1101	}
1404	else	1102	else
…		…
1406	/* yay, it was a symlink - build new path in tmp2 */	1104	/* yay, it was a symlink - build new path in tmp2 */
1407	int rellen = strlen (rel);	1105	int rellen = strlen (rel);
1408		1106
1409	errno = ENAMETOOLONG;	1107	errno = ENAMETOOLONG;
1410	if (linklen + 1 + rellen >= PATH_MAX)	1108	if (linklen + 1 + rellen >= PATH_MAX)
1411	return;	1109	return -1;
1412		1110
1413	errno = ELOOP;	1111	errno = ELOOP;
1414	if (!--symlinks)	1112	if (!--symlinks)
1415	return;	1113	return -1;
1416		1114
1417	if (*tmp1 == '/')	1115	if (*tmp1 == '/')
1418	res = req->ptr2; /* symlink resolves to an absolute path */	1116	res = tmpbuf->ptr; /* symlink resolves to an absolute path */
1419		1117
1420	/* 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 */
1421	memmove (tmp2 + linklen + 1, rel, rellen + 1);	1119	memmove (tmp2 + linklen + 1, rel, rellen + 1);
1422	tmp2 [linklen] = '/';	1120	tmp2 [linklen] = '/';
1423	memcpy (tmp2, tmp1, linklen);	1121	memcpy (tmp2, tmp1, linklen);
…		…
1425	rel = tmp2;	1123	rel = tmp2;
1426	}	1124	}
1427	}	1125	}
1428		1126
1429	/* special case for the lone root path */	1127	/* special case for the lone root path */
1430	if (res == req->ptr2)	1128	if (res == tmpbuf->ptr)
1431	*res++ = '/';	1129	*res++ = '/';
1432		1130
1433	req->result = res - (char *)req->ptr2;	1131	return res - (char *)tmpbuf->ptr;
1434		1132	#endif
1435	done:
1436	req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */
1437	}	1133	}
1438		1134
1439	static signed char	1135	static signed char
1440	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)	1136	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
1441	{	1137	{
…		…
1629	#ifdef _WIN32	1325	#ifdef _WIN32
1630	{	1326	{
1631	int len = strlen ((const char *)req->ptr1);	1327	int len = strlen ((const char *)req->ptr1);
1632	char *path = malloc (MAX_PATH);	1328	char *path = malloc (MAX_PATH);
1633	const char *fmt;	1329	const char *fmt;
		1330	const char *reqpath = wd_expand (&self->tmpbuf, req->wd, req->ptr1);
1634		1331
1635	if (!len)	1332	if (!len)
1636	fmt = "./*";	1333	fmt = "./*";
1637	else if (((const char *)req->ptr1)[len - 1] == '/' || ((const char *)req->ptr1)[len - 1] == '\\')	1334	else if (reqpath[len - 1] == '/' || reqpath[len - 1] == '\\')
1638	fmt = "%s*";	1335	fmt = "%s*";
1639	else	1336	else
1640	fmt = "%s/*";	1337	fmt = "%s/*";
1641		1338
1642	_snprintf (path, MAX_PATH, fmt, (const char *)req->ptr1);	1339	_snprintf (path, MAX_PATH, fmt, reqpath);
1643	dirp = FindFirstFile (path, &entp);	1340	dirp = FindFirstFile (path, &entp);
1644	free (path);	1341	free (path);
1645		1342
1646	if (dirp == INVALID_HANDLE_VALUE)	1343	if (dirp == INVALID_HANDLE_VALUE)
1647	{	1344	{
1648	dirp = 0;	1345	/* should steal _dosmaperr */
1649
1650	switch (GetLastError ())	1346	switch (GetLastError ())
1651	{	1347	{
1652	case ERROR_FILE_NOT_FOUND:	1348	case ERROR_FILE_NOT_FOUND:
1653	req->result = 0;	1349	req->result = 0;
1654	break;	1350	break;
1655		1351
1656	case ERROR_INVALID_NAME:	1352	case ERROR_INVALID_NAME:
1657	case ERROR_PATH_NOT_FOUND:	1353	case ERROR_PATH_NOT_FOUND:
1658	case ERROR_NO_MORE_FILES:	1354	case ERROR_NO_MORE_FILES:
1659	errno = ENOENT;	1355	errno = ENOENT;
1660	break;	1356	break;
1661		1357
1662	case ERROR_NOT_ENOUGH_MEMORY:	1358	case ERROR_NOT_ENOUGH_MEMORY:
1663	errno = ENOMEM;	1359	errno = ENOMEM;
1664	break;	1360	break;
1665		1361
1666	default:	1362	default:
1667	errno = EINVAL;	1363	errno = EINVAL;
1668	break;	1364	break;
1669	}	1365	}
		1366
		1367	return;
1670	}	1368	}
1671	}	1369	}
1672	#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
1673	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;
1674	#endif	1392	#endif
1675		1393
1676	if (req->flags & EIO_FLAG_PTR1_FREE)	1394	if (req->flags & EIO_FLAG_PTR1_FREE)
1677	free (req->ptr1);	1395	free (req->ptr1);
1678		1396
1679	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;	1397	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
1680	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;	1398	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
1681	req->ptr2 = names = malloc (namesalloc);	1399	req->ptr2 = names = malloc (namesalloc);
1682		1400
1683	if (dirp && names && (!flags || dents))	1401	if (!names || (flags && !dents))
		1402	return;
		1403
1684	for (;;)	1404	for (;;)
1685	{	1405	{
1686	int done;	1406	int done;
1687		1407
1688	#ifdef _WIN32	1408	#ifdef _WIN32
1689	done = !dirp;	1409	done = !dirp;
1690	#else	1410	#else
1691	errno = 0;	1411	errno = 0;
1692	entp = readdir (dirp);	1412	entp = readdir (dirp);
1693	done = !entp;	1413	done = !entp;
1694	#endif	1414	#endif
1695		1415
1696	if (done)	1416	if (done)
1697	{	1417	{
1698	#ifndef _WIN32	1418	#ifndef _WIN32
1699	int old_errno = errno;	1419	int old_errno = errno;
1700	closedir (dirp);	1420	closedir (dirp);
1701	errno = old_errno;	1421	errno = old_errno;
1702		1422
1703	if (errno)	1423	if (errno)
1704	break;	1424	break;
1705	#endif	1425	#endif
1706		1426
1707	/* sort etc. */	1427	/* sort etc. */
1708	req->int1 = flags;	1428	req->int1 = flags;
1709	req->result = dentoffs;	1429	req->result = dentoffs;
1710		1430
1711	if (flags & EIO_READDIR_STAT_ORDER)	1431	if (flags & EIO_READDIR_STAT_ORDER)
1712	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);
1713	else if (flags & EIO_READDIR_DIRS_FIRST)	1433	else if (flags & EIO_READDIR_DIRS_FIRST)
1714	if (flags & EIO_READDIR_FOUND_UNKNOWN)	1434	if (flags & EIO_READDIR_FOUND_UNKNOWN)
1715	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 */
1716	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))
1717	{	1487	{
1718	/* 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
1719	eio_dirent *oth = dents + dentoffs;	1495	ent = dents + dentoffs;
1720	eio_dirent *dir = dents;
1721		1496
1722	/* 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 */
1723	/* by walking from both sides and swapping if necessary */	1498	ent->namelen = len - 1;
1724	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)
1725	{	1559	{
1726	if (dir->type == EIO_DT_DIR)	1560	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
1727	++dir;	1561	ent->score = 1;
1728	else if ((--oth)->type == EIO_DT_DIR)	1562	else if (!strchr (name, '.')) /* absence of dots indicate likely dirs */
1729	{	1563	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1730	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
1731
1732	++dir;
1733	}
1734	}	1564	}
1735		1565	else if (ent->type == EIO_DT_DIR)
1736	/* now sort the dirs only (dirs all have the same score) */	1566	ent->score = 0;
1737	eio_dent_sort (dents, dir - dents, 0, inode_bits);
1738	}	1567	}
1739
1740	break;
1741	}
1742
1743	/* now add the entry to our list(s) */
1744	name = D_NAME (entp);
1745
1746	/* skip . and .. entries */
1747	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1748	{
1749	int len = D_NAMLEN (entp) + 1;
1750
1751	while (ecb_expect_false (namesoffs + len > namesalloc))
1752	{
1753	namesalloc *= 2;
1754	req->ptr2 = names = realloc (names, namesalloc);
1755
1756	if (!names)
1757	break;
1758	}	1568	}
1759		1569
1760	memcpy (names + namesoffs, name, len);
1761
1762	if (dents)
1763	{
1764	struct eio_dirent *ent;
1765
1766	if (ecb_expect_false (dentoffs == dentalloc))
1767	{
1768	dentalloc *= 2;
1769	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
1770
1771	if (!dents)
1772	break;
1773	}
1774
1775	ent = dents + dentoffs;
1776
1777	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
1778	ent->namelen = len - 1;
1779	ent->inode = D_INO (entp);
1780
1781	inode_bits |= ent->inode;
1782
1783	switch (D_TYPE (entp))
1784	{
1785	default:
1786	ent->type = EIO_DT_UNKNOWN;
1787	flags |= EIO_READDIR_FOUND_UNKNOWN;
1788	break;
1789
1790	#ifdef DT_FIFO
1791	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
1792	#endif
1793	#ifdef DT_CHR
1794	case DT_CHR: ent->type = EIO_DT_CHR; break;
1795	#endif
1796	#ifdef DT_MPC
1797	case DT_MPC: ent->type = EIO_DT_MPC; break;
1798	#endif
1799	#ifdef DT_DIR
1800	case DT_DIR: ent->type = EIO_DT_DIR; break;
1801	#endif
1802	#ifdef DT_NAM
1803	case DT_NAM: ent->type = EIO_DT_NAM; break;
1804	#endif
1805	#ifdef DT_BLK
1806	case DT_BLK: ent->type = EIO_DT_BLK; break;
1807	#endif
1808	#ifdef DT_MPB
1809	case DT_MPB: ent->type = EIO_DT_MPB; break;
1810	#endif
1811	#ifdef DT_REG
1812	case DT_REG: ent->type = EIO_DT_REG; break;
1813	#endif
1814	#ifdef DT_NWK
1815	case DT_NWK: ent->type = EIO_DT_NWK; break;
1816	#endif
1817	#ifdef DT_CMP
1818	case DT_CMP: ent->type = EIO_DT_CMP; break;
1819	#endif
1820	#ifdef DT_LNK
1821	case DT_LNK: ent->type = EIO_DT_LNK; break;
1822	#endif
1823	#ifdef DT_SOCK
1824	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
1825	#endif
1826	#ifdef DT_DOOR
1827	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
1828	#endif
1829	#ifdef DT_WHT
1830	case DT_WHT: ent->type = EIO_DT_WHT; break;
1831	#endif
1832	}
1833
1834	ent->score = 7;
1835
1836	if (flags & EIO_READDIR_DIRS_FIRST)
1837	{
1838	if (ent->type == EIO_DT_UNKNOWN)
1839	{
1840	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
1841	ent->score = 1;
1842	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
1843	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1844	}
1845	else if (ent->type == EIO_DT_DIR)
1846	ent->score = 0;
1847	}
1848	}
1849
1850	namesoffs += len;	1570	namesoffs += len;
1851	++dentoffs;	1571	++dentoffs;
1852	}	1572	}
1853		1573
1854	if (EIO_CANCELLED (req))	1574	if (EIO_CANCELLED (req))
1855	{	1575	{
1856	errno = ECANCELED;	1576	errno = ECANCELED;
1857	break;	1577	break;
1858	}	1578	}
1859		1579
1860	#ifdef _WIN32	1580	#ifdef _WIN32
1861	if (!FindNextFile (dirp, &entp))	1581	if (!FindNextFile (dirp, &entp))
1862	{	1582	{
1863	FindClose (dirp);	1583	FindClose (dirp);
1864	dirp = 0;	1584	dirp = 0;
1865	}	1585	}
1866	#endif	1586	#endif
1867	}	1587	}
1868	}	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
1869		1711
1870	/*****************************************************************************/	1712	/*****************************************************************************/
1871		1713
1872	#define ALLOC(len) \	1714	#define ALLOC(len) \
1873	if (!req->ptr2) \	1715	if (!req->ptr2) \
1874	{ \	1716	{ \
1875	X_LOCK (wrklock); \	1717	X_LOCK (EIO_POOL->wrklock); \
1876	req->flags |= EIO_FLAG_PTR2_FREE; \	1718	req->flags |= EIO_FLAG_PTR2_FREE; \
1877	X_UNLOCK (wrklock); \	1719	X_UNLOCK (EIO_POOL->wrklock); \
1878	req->ptr2 = malloc (len); \	1720	req->ptr2 = malloc (len); \
1879	if (!req->ptr2) \	1721	if (!req->ptr2) \
1880	{ \	1722	{ \
1881	errno = ENOMEM; \	1723	errno = ENOMEM; \
1882	req->result = -1; \	1724	req->result = -1; \
1883	break; \	1725	break; \
1884	} \	1726	} \
1885	}	1727	}
1886		1728
1887	X_THREAD_PROC (etp_proc)
1888	{
1889	ETP_REQ *req;
1890	struct timespec ts;
1891	etp_worker *self = (etp_worker *)thr_arg;
1892
1893	/* try to distribute timeouts somewhat evenly */
1894	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
1895
1896	for (;;)
1897	{
1898	ts.tv_sec = 0;
1899
1900	X_LOCK (reqlock);
1901
1902	for (;;)
1903	{
1904	self->req = req = reqq_shift (&req_queue);
1905
1906	if (req)
1907	break;
1908
1909	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
1910	{
1911	X_UNLOCK (reqlock);
1912	X_LOCK (wrklock);
1913	--started;
1914	X_UNLOCK (wrklock);
1915	goto quit;
1916	}
1917
1918	++idle;
1919
1920	if (idle <= max_idle)
1921	/* we are allowed to idle, so do so without any timeout */
1922	X_COND_WAIT (reqwait, reqlock);
1923	else
1924	{
1925	/* initialise timeout once */
1926	if (!ts.tv_sec)
1927	ts.tv_sec = time (0) + idle_timeout;
1928
1929	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
1930	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
1931	}
1932
1933	--idle;
1934	}
1935
1936	--nready;
1937
1938	X_UNLOCK (reqlock);
1939
1940	if (req->type < 0)
1941	goto quit;
1942
1943	ETP_EXECUTE (self, req);
1944
1945	X_LOCK (reslock);
1946
1947	++npending;
1948
1949	if (!reqq_push (&res_queue, req) && want_poll_cb)
1950	want_poll_cb ();
1951
1952	self->req = 0;
1953	etp_worker_clear (self);
1954
1955	X_UNLOCK (reslock);
1956	}
1957
1958	quit:
1959	X_LOCK (wrklock);
1960	etp_worker_free (self);
1961	X_UNLOCK (wrklock);
1962
1963	return 0;
1964	}
1965
1966	/*****************************************************************************/	1729	/*****************************************************************************/
1967		1730
1968	int ecb_cold	1731	int ecb_cold
1969	eio_init (void (*want_poll)(void), void (*done_poll)(void))	1732	eio_init (void (*want_poll)(void), void (*done_poll)(void))
1970	{	1733	{
1971	#if !HAVE_PREADWRITE	1734	eio_want_poll_cb = want_poll;
1972	X_MUTEX_CREATE (preadwritelock);	1735	eio_done_poll_cb = done_poll;
1973	#endif
1974		1736
1975	return etp_init (want_poll, done_poll);	1737	return etp_init (EIO_POOL, 0, 0, 0);
1976	}	1738	}
1977		1739
1978	ecb_inline void	1740	ecb_inline void
1979	eio_api_destroy (eio_req *req)	1741	eio_api_destroy (eio_req *req)
1980	{	1742	{
1981	free (req);	1743	free (req);
1982	}	1744	}
1983		1745
1984	#define REQ(rtype) \	1746	#define REQ(rtype) \
1985	eio_req *req; \	1747	eio_req *req; \
1986	\	1748	\
1987	req = (eio_req *)calloc (1, sizeof *req); \	1749	req = (eio_req *)calloc (1, sizeof *req); \
1988	if (!req) \	1750	if (!req) \
1989	return 0; \	1751	return 0; \
…		…
2003	{ \	1765	{ \
2004	eio_api_destroy (req); \	1766	eio_api_destroy (req); \
2005	return 0; \	1767	return 0; \
2006	}	1768	}
2007		1769
		1770	#define SINGLEDOT(ptr) (0[(char *)(ptr)] == '.' && !1[(char *)(ptr)])
		1771
2008	static void	1772	static void
2009	eio_execute (etp_worker *self, eio_req *req)	1773	eio_execute (etp_worker *self, eio_req *req)
2010	{	1774	{
		1775	#if HAVE_AT
		1776	int dirfd;
		1777	#else
		1778	const char *path;
		1779	#endif
		1780
2011	if (ecb_expect_false (EIO_CANCELLED (req)))	1781	if (ecb_expect_false (EIO_CANCELLED (req)))
2012	{	1782	{
2013	req->result = -1;	1783	req->result = -1;
2014	req->errorno = ECANCELED;	1784	req->errorno = ECANCELED;
2015	return;	1785	return;
2016	}	1786	}
2017		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
2018	switch (req->type)	1804	switch (req->type)
2019	{	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;
2020	case EIO_READ: ALLOC (req->size);	1813	case EIO_READ: ALLOC (req->size);
2021	req->result = req->offs >= 0	1814	req->result = req->offs >= 0
2022	? pread (req->int1, req->ptr2, req->size, req->offs)	1815	? pread (req->int1, req->ptr2, req->size, req->offs)
2023	: read (req->int1, req->ptr2, req->size); break;	1816	: read (req->int1, req->ptr2, req->size); break;
2024	case EIO_WRITE: req->result = req->offs >= 0	1817	case EIO_WRITE: req->result = req->offs >= 0
…		…
2026	: write (req->int1, req->ptr2, req->size); break;	1819	: write (req->int1, req->ptr2, req->size); break;
2027		1820
2028	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;
2029	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;
2030		1823
		1824	#if HAVE_AT
		1825
2031	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1826	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2032	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;
2033	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));
2034	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
2035	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1932	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
2036	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;	1933	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
2037		1934
2038	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2039	req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
2040	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));	1935	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
2041	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;	1936	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
2042		1937
2043	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
2044	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;	1938	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
2045	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
2046	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;	1939	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
2047	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
2048	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;	1940	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
2049		1941
2050	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
2051	case EIO_CLOSE: req->result = close (req->int1); break;	1942	case EIO_CLOSE: req->result = close (req->int1); break;
2052	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;	1943	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
2053	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
2054	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
2055	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
2056	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
2057	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
2058	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
2059	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
2060
2061	case EIO_REALPATH: eio__realpath (req, self); break;
2062
2063	case EIO_READLINK: ALLOC (PATH_MAX);
2064	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
2065
2066	case EIO_SYNC: req->result = 0; sync (); break;	1944	case EIO_SYNC: req->result = 0; sync (); break;
2067	case EIO_FSYNC: req->result = fsync (req->int1); break;	1945	case EIO_FSYNC: req->result = fsync (req->int1); break;
2068	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;	1946	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		1947	case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break;
		1948	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
2069	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;	1949	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
2070	case EIO_MTOUCH: req->result = eio__mtouch (req); break;	1950	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
2071	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;	1951	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
2072	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;	1952	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
2073	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
2074	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;	1953	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
2075		1954
2076	case EIO_READDIR: eio__scandir (req, self); break;	1955	case EIO_READDIR: eio__scandir (req, self); break;
2077		1956
2078	case EIO_BUSY:	1957	case EIO_BUSY:
…		…
2088	req->result = select (0, 0, 0, 0, &tv);	1967	req->result = select (0, 0, 0, 0, &tv);
2089	}	1968	}
2090	#endif	1969	#endif
2091	break;	1970	break;
2092		1971
2093	case EIO_UTIME:	1972	#if 0
2094	case EIO_FUTIME:
2095	{
2096	struct timeval tv[2];
2097	struct timeval *times;
2098
2099	if (req->nv1 != -1. || req->nv2 != -1.)
2100	{
2101	tv[0].tv_sec = req->nv1;
2102	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
2103	tv[1].tv_sec = req->nv2;
2104	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
2105
2106	times = tv;
2107	}
2108	else
2109	times = 0;
2110
2111	req->result = req->type == EIO_FUTIME
2112	? futimes (req->int1, times)
2113	: utimes (req->ptr1, times);
2114	}
2115	break;
2116
2117	case EIO_GROUP:	1973	case EIO_GROUP:
2118	abort (); /* handled in eio_request */	1974	abort (); /* handled in eio_request */
		1975	#endif
2119		1976
2120	case EIO_NOP:	1977	case EIO_NOP:
2121	req->result = 0;	1978	req->result = 0;
2122	break;	1979	break;
2123		1980
2124	case EIO_CUSTOM:	1981	case EIO_CUSTOM:
2125	req->feed (req);	1982	req->feed (req);
2126	break;	1983	break;
2127		1984
2128	default:	1985	default:
2129	errno = ENOSYS;
2130	req->result = -1;	1986	req->result = EIO_ENOSYS ();
2131	break;	1987	break;
2132	}	1988	}
2133		1989
2134	req->errorno = errno;	1990	req->errorno = errno;
2135	}	1991	}
2136		1992
2137	#ifndef EIO_NO_WRAPPERS	1993	#ifndef EIO_NO_WRAPPERS
2138		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
2139	eio_req *eio_nop (int pri, eio_cb cb, void *data)	2005	eio_req *eio_nop (int pri, eio_cb cb, void *data)
2140	{	2006	{
2141	REQ (EIO_NOP); SEND;	2007	REQ (EIO_NOP); SEND;
2142	}	2008	}
2143		2009
…		…
2159	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)	2025	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
2160	{	2026	{
2161	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;	2027	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
2162	}	2028	}
2163		2029
		2030	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
		2031	{
		2032	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
		2033	}
		2034
		2035	eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data)
		2036	{
		2037	REQ (EIO_SYNCFS); req->int1 = fd; SEND;
		2038	}
		2039
		2040	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		2041	{
		2042	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		2043	}
		2044
2164	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)	2045	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
2165	{	2046	{
2166	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;	2047	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
2167	}	2048	}
2168		2049
…		…
2174	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)	2055	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
2175	{	2056	{
2176	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;	2057	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
2177	}	2058	}
2178		2059
2179	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
2180	{
2181	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
2182	}
2183
2184	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)	2060	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
2185	{	2061	{
2186	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;	2062	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
2187	}	2063	}
2188		2064
2189	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
2190	{
2191	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
2192	}
2193
2194	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)	2065	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
2195	{	2066	{
2196	REQ (EIO_CLOSE); req->int1 = fd; SEND;	2067	REQ (EIO_CLOSE); req->int1 = fd; SEND;
2197	}	2068	}
2198		2069
2199	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)
2200	{	2071	{
2201	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;
2202	}	2078	}
2203		2079
2204	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)
2205	{	2081	{
2206	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;
…		…
2404	void	2280	void
2405	eio_grp_add (eio_req *grp, eio_req *req)	2281	eio_grp_add (eio_req *grp, eio_req *req)
2406	{	2282	{
2407	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));
2408		2284
2409	grp->flags |= EIO_FLAG_GROUPADD;	2285	grp->flags |= ETP_FLAG_GROUPADD;
2410		2286
2411	++grp->size;	2287	++grp->size;
2412	req->grp = grp;	2288	req->grp = grp;
2413		2289
2414	req->grp_prev = 0;	2290	req->grp_prev = 0;

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