[ViewVC] Diff of: cvs/libeio/eio.c

Comparing libeio/eio.c (file contents):
Revision 1.110 by root, Tue Sep 27 12:36:19 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)
296
297	/*****************************************************************************/	339	/*****************************************************************************/
298		340
299	struct tmpbuf
300	{
301	void *ptr;
302	int len;
303	};
304
305	static void *
306	tmpbuf_get (struct tmpbuf *buf, int len)
307	{
308	if (buf->len < len)
309	{
310	free (buf->ptr);
311	buf->ptr = malloc (buf->len = len);
312	}
313
314	return buf->ptr;
315	}
316
317	struct tmpbuf;	341	struct etp_tmpbuf;
318		342
319	#if _POSIX_VERSION >= 200809L	343	#if _POSIX_VERSION >= 200809L
320	#define HAVE_AT 1	344	#define HAVE_AT 1
321	#define WD2FD(wd) ((wd) ? (wd)->fd : AT_FDCWD)	345	#define WD2FD(wd) ((wd) ? (wd)->fd : AT_FDCWD)
322	#ifndef O_SEARCH	346	#ifndef O_SEARCH
323	#define O_SEARCH O_RDONLY	347	#define O_SEARCH O_RDONLY
324	#endif	348	#endif
325	#else	349	#else
326	#define HAVE_AT 0	350	#define HAVE_AT 0
327	static const char wd_expand (struct tmpbuf tmpbuf, eio_wd wd, const char *path);	351	static const char wd_expand (struct etp_tmpbuf tmpbuf, eio_wd wd, const char *path);
328	#endif	352	#endif
329		353
330	struct eio_pwd	354	struct eio_pwd
331	{	355	{
332	#if HAVE_AT	356	#if HAVE_AT
…		…
339	/*****************************************************************************/	363	/*****************************************************************************/
340		364
341	#define ETP_PRI_MIN EIO_PRI_MIN	365	#define ETP_PRI_MIN EIO_PRI_MIN
342	#define ETP_PRI_MAX EIO_PRI_MAX	366	#define ETP_PRI_MAX EIO_PRI_MAX
343		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
344	struct etp_worker;	378	struct etp_worker;
345
346	#define ETP_REQ eio_req	379	#define ETP_REQ eio_req
347	#define ETP_DESTROY(req) eio_destroy (req)	380	#define ETP_DESTROY(req) eio_destroy (req)
348	static int eio_finish (eio_req *req);	381	static int eio_finish (eio_req *req);
349	#define ETP_FINISH(req) eio_finish (req)	382	#define ETP_FINISH(req) eio_finish (req)
350	static void eio_execute (struct etp_worker self, eio_req req);	383	static void eio_execute (struct etp_worker self, eio_req req);
351	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)	384	#define ETP_EXECUTE(wrk,req) eio_execute (wrk, req)
352		385
353	/*****************************************************************************/	386	#include "etp.c"
354		387
355	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)	388	static struct etp_pool eio_pool;
356		389	#define EIO_POOL (&eio_pool)
357	/* calculate time difference in ~1/EIO_TICKS of a second */
358	ecb_inline int
359	tvdiff (struct timeval tv1, struct timeval tv2)
360	{
361	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
362	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
363	}
364
365	static unsigned int started, idle, wanted = 4;
366
367	static void (*want_poll_cb) (void);
368	static void (*done_poll_cb) (void);
369
370	static unsigned int max_poll_time; /* reslock */
371	static unsigned int max_poll_reqs; /* reslock */
372
373	static unsigned int nreqs; /* reqlock */
374	static unsigned int nready; /* reqlock */
375	static unsigned int npending; /* reqlock */
376	static unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
377	static unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
378
379	static xmutex_t wrklock;
380	static xmutex_t reslock;
381	static xmutex_t reqlock;
382	static xcond_t reqwait;
383
384	#if !HAVE_PREADWRITE
385	/*
386	* make our pread/pwrite emulation safe against themselves, but not against
387	* normal read/write by using a mutex. slows down execution a lot,
388	* but that's your problem, not mine.
389	*/
390	static xmutex_t preadwritelock;
391	#endif
392
393	typedef struct etp_worker
394	{
395	struct tmpbuf tmpbuf;
396
397	/* locked by wrklock */
398	struct etp_worker prev, next;
399
400	xthread_t tid;
401
402	#ifdef ETP_WORKER_COMMON
403	ETP_WORKER_COMMON
404	#endif
405	} etp_worker;
406
407	static etp_worker wrk_first; /* NOT etp */
408
409	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
410	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
411
412	/* worker threads management */
413
414	static void
415	etp_worker_clear (etp_worker *wrk)
416	{
417	}
418
419	static void ecb_cold
420	etp_worker_free (etp_worker *wrk)
421	{
422	free (wrk->tmpbuf.ptr);
423
424	wrk->next->prev = wrk->prev;
425	wrk->prev->next = wrk->next;
426
427	free (wrk);
428	}
429
430	static unsigned int
431	etp_nreqs (void)
432	{
433	int retval;
434	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
435	retval = nreqs;
436	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
437	return retval;
438	}
439
440	static unsigned int
441	etp_nready (void)
442	{
443	unsigned int retval;
444
445	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
446	retval = nready;
447	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
448
449	return retval;
450	}
451
452	static unsigned int
453	etp_npending (void)
454	{
455	unsigned int retval;
456
457	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
458	retval = npending;
459	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
460
461	return retval;
462	}
463
464	static unsigned int
465	etp_nthreads (void)
466	{
467	unsigned int retval;
468
469	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
470	retval = started;
471	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
472
473	return retval;
474	}
475
476	/*
477	* a somewhat faster data structure might be nice, but
478	* with 8 priorities this actually needs <20 insns
479	* per shift, the most expensive operation.
480	*/
481	typedef struct {
482	ETP_REQ qs[ETP_NUM_PRI], qe[ETP_NUM_PRI]; /* qstart, qend */
483	int size;
484	} etp_reqq;
485
486	static etp_reqq req_queue;
487	static etp_reqq res_queue;
488
489	static void ecb_noinline ecb_cold
490	reqq_init (etp_reqq *q)
491	{
492	int pri;
493
494	for (pri = 0; pri < ETP_NUM_PRI; ++pri)
495	q->qs[pri] = q->qe[pri] = 0;
496
497	q->size = 0;
498	}
499
500	static int ecb_noinline
501	reqq_push (etp_reqq q, ETP_REQ req)
502	{
503	int pri = req->pri;
504	req->next = 0;
505
506	if (q->qe[pri])
507	{
508	q->qe[pri]->next = req;
509	q->qe[pri] = req;
510	}
511	else
512	q->qe[pri] = q->qs[pri] = req;
513
514	return q->size++;
515	}
516
517	static ETP_REQ * ecb_noinline
518	reqq_shift (etp_reqq *q)
519	{
520	int pri;
521
522	if (!q->size)
523	return 0;
524
525	--q->size;
526
527	for (pri = ETP_NUM_PRI; pri--; )
528	{
529	eio_req *req = q->qs[pri];
530
531	if (req)
532	{
533	if (!(q->qs[pri] = (eio_req *)req->next))
534	q->qe[pri] = 0;
535
536	return req;
537	}
538	}
539
540	abort ();
541	}
542
543	static int ecb_cold
544	etp_init (void (want_poll)(void), void (done_poll)(void))
545	{
546	X_MUTEX_CREATE (wrklock);
547	X_MUTEX_CREATE (reslock);
548	X_MUTEX_CREATE (reqlock);
549	X_COND_CREATE (reqwait);
550
551	reqq_init (&req_queue);
552	reqq_init (&res_queue);
553
554	wrk_first.next =
555	wrk_first.prev = &wrk_first;
556
557	started = 0;
558	idle = 0;
559	nreqs = 0;
560	nready = 0;
561	npending = 0;
562
563	want_poll_cb = want_poll;
564	done_poll_cb = done_poll;
565
566	return 0;
567	}
568
569	X_THREAD_PROC (etp_proc);
570
571	static void ecb_cold
572	etp_start_thread (void)
573	{
574	etp_worker *wrk = calloc (1, sizeof (etp_worker));
575
576	/TODO/
577	assert (("unable to allocate worker thread data", wrk));
578
579	X_LOCK (wrklock);
580
581	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
582	{
583	wrk->prev = &wrk_first;
584	wrk->next = wrk_first.next;
585	wrk_first.next->prev = wrk;
586	wrk_first.next = wrk;
587	++started;
588	}
589	else
590	free (wrk);
591
592	X_UNLOCK (wrklock);
593	}
594
595	static void
596	etp_maybe_start_thread (void)
597	{
598	if (ecb_expect_true (etp_nthreads () >= wanted))
599	return;
600
601	/* todo: maybe use idle here, but might be less exact */
602	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
603	return;
604
605	etp_start_thread ();
606	}
607
608	static void ecb_cold
609	etp_end_thread (void)
610	{
611	eio_req req = calloc (1, sizeof (eio_req)); / will be freed by worker */
612
613	req->type = -1;
614	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
615
616	X_LOCK (reqlock);
617	reqq_push (&req_queue, req);
618	X_COND_SIGNAL (reqwait);
619	X_UNLOCK (reqlock);
620
621	X_LOCK (wrklock);
622	--started;
623	X_UNLOCK (wrklock);
624	}
625
626	static int
627	etp_poll (void)
628	{
629	unsigned int maxreqs;
630	unsigned int maxtime;
631	struct timeval tv_start, tv_now;
632
633	X_LOCK (reslock);
634	maxreqs = max_poll_reqs;
635	maxtime = max_poll_time;
636	X_UNLOCK (reslock);
637
638	if (maxtime)
639	gettimeofday (&tv_start, 0);
640
641	for (;;)
642	{
643	ETP_REQ *req;
644
645	etp_maybe_start_thread ();
646
647	X_LOCK (reslock);
648	req = reqq_shift (&res_queue);
649
650	if (req)
651	{
652	--npending;
653
654	if (!res_queue.size && done_poll_cb)
655	done_poll_cb ();
656	}
657
658	X_UNLOCK (reslock);
659
660	if (!req)
661	return 0;
662
663	X_LOCK (reqlock);
664	--nreqs;
665	X_UNLOCK (reqlock);
666
667	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
668	{
669	req->int1 = 1; /* mark request as delayed */
670	continue;
671	}
672	else
673	{
674	int res = ETP_FINISH (req);
675	if (ecb_expect_false (res))
676	return res;
677	}
678
679	if (ecb_expect_false (maxreqs && !--maxreqs))
680	break;
681
682	if (maxtime)
683	{
684	gettimeofday (&tv_now, 0);
685
686	if (tvdiff (&tv_start, &tv_now) >= maxtime)
687	break;
688	}
689	}
690
691	errno = EAGAIN;
692	return -1;
693	}
694
695	static void
696	etp_cancel (ETP_REQ *req)
697	{
698	req->cancelled = 1;
699
700	eio_grp_cancel (req);
701	}
702
703	static void
704	etp_submit (ETP_REQ *req)
705	{
706	req->pri -= ETP_PRI_MIN;
707
708	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
709	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
710
711	if (ecb_expect_false (req->type == EIO_GROUP))
712	{
713	/* I hope this is worth it :/ */
714	X_LOCK (reqlock);
715	++nreqs;
716	X_UNLOCK (reqlock);
717
718	X_LOCK (reslock);
719
720	++npending;
721
722	if (!reqq_push (&res_queue, req) && want_poll_cb)
723	want_poll_cb ();
724
725	X_UNLOCK (reslock);
726	}
727	else
728	{
729	X_LOCK (reqlock);
730	++nreqs;
731	++nready;
732	reqq_push (&req_queue, req);
733	X_COND_SIGNAL (reqwait);
734	X_UNLOCK (reqlock);
735
736	etp_maybe_start_thread ();
737	}
738	}
739
740	static void ecb_cold
741	etp_set_max_poll_time (double nseconds)
742	{
743	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
744	max_poll_time = nseconds * EIO_TICKS;
745	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
746	}
747
748	static void ecb_cold
749	etp_set_max_poll_reqs (unsigned int maxreqs)
750	{
751	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
752	max_poll_reqs = maxreqs;
753	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
754	}
755
756	static void ecb_cold
757	etp_set_max_idle (unsigned int nthreads)
758	{
759	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
760	max_idle = nthreads;
761	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
762	}
763
764	static void ecb_cold
765	etp_set_idle_timeout (unsigned int seconds)
766	{
767	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
768	idle_timeout = seconds;
769	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
770	}
771
772	static void ecb_cold
773	etp_set_min_parallel (unsigned int nthreads)
774	{
775	if (wanted < nthreads)
776	wanted = nthreads;
777	}
778
779	static void ecb_cold
780	etp_set_max_parallel (unsigned int nthreads)
781	{
782	if (wanted > nthreads)
783	wanted = nthreads;
784
785	while (started > wanted)
786	etp_end_thread ();
787	}
788		390
789	/*****************************************************************************/	391	/*****************************************************************************/
790		392
791	static void	393	static void
792	grp_try_feed (eio_req *grp)	394	grp_try_feed (eio_req *grp)
793	{	395	{
794	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	396	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
795	{	397	{
796	grp->flags &= ~EIO_FLAG_GROUPADD;	398	grp->flags &= ~ETP_FLAG_GROUPADD;
797		399
798	EIO_FEED (grp);	400	EIO_FEED (grp);
799		401
800	/* stop if no progress has been made */	402	/* stop if no progress has been made */
801	if (!(grp->flags & EIO_FLAG_GROUPADD))	403	if (!(grp->flags & ETP_FLAG_GROUPADD))
802	{	404	{
803	grp->feed = 0;	405	grp->feed = 0;
804	break;	406	break;
805	}	407	}
806	}	408	}
…		…
813		415
814	/* call feeder, if applicable */	416	/* call feeder, if applicable */
815	grp_try_feed (grp);	417	grp_try_feed (grp);
816		418
817	/* finish, if done */	419	/* finish, if done */
818	if (!grp->size && grp->int1)	420	if (!grp->size && grp->flags & ETP_FLAG_DELAYED)
819	return eio_finish (grp);	421	return eio_finish (grp);
820	else	422	else
821	return 0;	423	return 0;
822	}	424	}
823		425
…		…
859	}	461	}
860		462
861	void	463	void
862	eio_grp_cancel (eio_req *grp)	464	eio_grp_cancel (eio_req *grp)
863	{	465	{
864	for (grp = grp->grp_first; grp; grp = grp->grp_next)	466	etp_grp_cancel (EIO_POOL, grp);
865	eio_cancel (grp);
866	}	467	}
867		468
868	void	469	void
869	eio_cancel (eio_req *req)	470	eio_cancel (eio_req *req)
870	{	471	{
871	etp_cancel (req);	472	etp_cancel (EIO_POOL, req);
872	}	473	}
873		474
874	void	475	void
875	eio_submit (eio_req *req)	476	eio_submit (eio_req *req)
876	{	477	{
877	etp_submit (req);	478	etp_submit (EIO_POOL, req);
878	}	479	}
879		480
880	unsigned int	481	unsigned int
881	eio_nreqs (void)	482	eio_nreqs (void)
882	{	483	{
883	return etp_nreqs ();	484	return etp_nreqs (EIO_POOL);
884	}	485	}
885		486
886	unsigned int	487	unsigned int
887	eio_nready (void)	488	eio_nready (void)
888	{	489	{
889	return etp_nready ();	490	return etp_nready (EIO_POOL);
890	}	491	}
891		492
892	unsigned int	493	unsigned int
893	eio_npending (void)	494	eio_npending (void)
894	{	495	{
895	return etp_npending ();	496	return etp_npending (EIO_POOL);
896	}	497	}
897		498
898	unsigned int ecb_cold	499	unsigned int ecb_cold
899	eio_nthreads (void)	500	eio_nthreads (void)
900	{	501	{
901	return etp_nthreads ();	502	return etp_nthreads (EIO_POOL);
902	}	503	}
903		504
904	void ecb_cold	505	void ecb_cold
905	eio_set_max_poll_time (double nseconds)	506	eio_set_max_poll_time (double nseconds)
906	{	507	{
907	etp_set_max_poll_time (nseconds);	508	etp_set_max_poll_time (EIO_POOL, nseconds);
908	}	509	}
909		510
910	void ecb_cold	511	void ecb_cold
911	eio_set_max_poll_reqs (unsigned int maxreqs)	512	eio_set_max_poll_reqs (unsigned int maxreqs)
912	{	513	{
913	etp_set_max_poll_reqs (maxreqs);	514	etp_set_max_poll_reqs (EIO_POOL, maxreqs);
914	}	515	}
915		516
916	void ecb_cold	517	void ecb_cold
917	eio_set_max_idle (unsigned int nthreads)	518	eio_set_max_idle (unsigned int nthreads)
918	{	519	{
919	etp_set_max_idle (nthreads);	520	etp_set_max_idle (EIO_POOL, nthreads);
920	}	521	}
921		522
922	void ecb_cold	523	void ecb_cold
923	eio_set_idle_timeout (unsigned int seconds)	524	eio_set_idle_timeout (unsigned int seconds)
924	{	525	{
925	etp_set_idle_timeout (seconds);	526	etp_set_idle_timeout (EIO_POOL, seconds);
926	}	527	}
927		528
928	void ecb_cold	529	void ecb_cold
929	eio_set_min_parallel (unsigned int nthreads)	530	eio_set_min_parallel (unsigned int nthreads)
930	{	531	{
931	etp_set_min_parallel (nthreads);	532	etp_set_min_parallel (EIO_POOL, nthreads);
932	}	533	}
933		534
934	void ecb_cold	535	void ecb_cold
935	eio_set_max_parallel (unsigned int nthreads)	536	eio_set_max_parallel (unsigned int nthreads)
936	{	537	{
937	etp_set_max_parallel (nthreads);	538	etp_set_max_parallel (EIO_POOL, nthreads);
938	}	539	}
939		540
940	int eio_poll (void)	541	int eio_poll (void)
941	{	542	{
942	return etp_poll ();	543	return etp_poll (EIO_POOL);
943	}	544	}
944		545
945	/*****************************************************************************/	546	/*****************************************************************************/
946	/* work around various missing functions */	547	/* work around various missing functions */
947
948	#if !HAVE_PREADWRITE
949	# undef pread
950	# undef pwrite
951	# define pread eio__pread
952	# define pwrite eio__pwrite
953
954	static eio_ssize_t
955	eio__pread (int fd, void *buf, size_t count, off_t offset)
956	{
957	eio_ssize_t res;
958	off_t ooffset;
959
960	X_LOCK (preadwritelock);
961	ooffset = lseek (fd, 0, SEEK_CUR);
962	lseek (fd, offset, SEEK_SET);
963	res = read (fd, buf, count);
964	lseek (fd, ooffset, SEEK_SET);
965	X_UNLOCK (preadwritelock);
966
967	return res;
968	}
969
970	static eio_ssize_t
971	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
972	{
973	eio_ssize_t res;
974	off_t ooffset;
975
976	X_LOCK (preadwritelock);
977	ooffset = lseek (fd, 0, SEEK_CUR);
978	lseek (fd, offset, SEEK_SET);
979	res = write (fd, buf, count);
980	lseek (fd, ooffset, SEEK_SET);
981	X_UNLOCK (preadwritelock);
982
983	return res;
984	}
985	#endif
986		548
987	#ifndef HAVE_UTIMES	549	#ifndef HAVE_UTIMES
988		550
989	# undef utimes	551	# undef utimes
990	# define utimes(path,times) eio__utimes (path, times)	552	# define utimes(path,times) eio__utimes (path, times)
…		…
1032	int res;	594	int res;
1033		595
1034	#if HAVE_SYS_SYNCFS	596	#if HAVE_SYS_SYNCFS
1035	res = (int)syscall (__NR_syncfs, (int)(fd));	597	res = (int)syscall (__NR_syncfs, (int)(fd));
1036	#else	598	#else
1037	res = -1;	599	res = EIO_ENOSYS ();
1038	errno = ENOSYS;
1039	#endif	600	#endif
1040		601
1041	if (res < 0 && errno == ENOSYS && fd >= 0)	602	if (res < 0 && errno == ENOSYS && fd >= 0)
1042	sync ();	603	sync ();
1043		604
…		…
1073	}	634	}
1074		635
1075	static int	636	static int
1076	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)
1077	{	638	{
1078	#if HAVE_FALLOCATE	639	#if HAVE_LINUX_FALLOCATE
1079	return fallocate (fd, mode, offset, len);	640	return fallocate (fd, mode, offset, len);
1080	#else	641	#else
1081	errno = ENOSYS;	642	return EIO_ENOSYS ();
1082	return -1;
1083	#endif	643	#endif
1084	}	644	}
1085		645
1086	#if !HAVE_READAHEAD	646	#if !HAVE_READAHEAD
1087	# undef readahead	647	# undef readahead
…		…
1102	todo -= len;	662	todo -= len;
1103	}	663	}
1104		664
1105	FUBd;	665	FUBd;
1106		666
1107	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 */
1108	return count;	669	return 0;
1109	}	670	}
1110		671
1111	#endif	672	#endif
1112		673
1113	/* sendfile always needs emulation */	674	/* sendfile always needs emulation */
…		…
1148		709
1149	/* according to source inspection, this is correct, and useful behaviour */	710	/* according to source inspection, this is correct, and useful behaviour */
1150	if (sbytes)	711	if (sbytes)
1151	res = sbytes;	712	res = sbytes;
1152		713
1153	# elif defined (__APPLE__)	714	# elif defined __APPLE__
1154	off_t sbytes = count;	715	off_t sbytes = count;
1155	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);	716	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
1156		717
1157	/* according to the manpage, sbytes is always valid */	718	/* according to the manpage, sbytes is always valid */
1158	if (sbytes)	719	if (sbytes)
…		…
1185	HANDLE h = TO_SOCKET (ifd);	746	HANDLE h = TO_SOCKET (ifd);
1186	SetFilePointer (h, offset, 0, FILE_BEGIN);	747	SetFilePointer (h, offset, 0, FILE_BEGIN);
1187	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);	748	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
1188		749
1189	#else	750	#else
1190	res = -1;	751	res = EIO_ENOSYS ();
1191	errno = ENOSYS;
1192	#endif	752	#endif
1193		753
1194	/* we assume sendfile can copy at least 128mb in one go */	754	/* we assume sendfile can copy at least 128mb in one go */
1195	if (res <= 128 * 1024 * 1024)	755	if (res <= 128 * 1024 * 1024)
1196	{	756	{
…		…
1382	}	942	}
1383		943
1384	/*****************************************************************************/	944	/*****************************************************************************/
1385	/* requests implemented outside eio_execute, because they are so large */	945	/* requests implemented outside eio_execute, because they are so large */
1386		946
		947	static void
		948	eio__lseek (eio_req *req)
		949	{
		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
1387	/* result will always end up in tmpbuf, there is always space for adding a 0-byte */	961	/* result will always end up in tmpbuf, there is always space for adding a 0-byte */
1388	static int	962	static int
1389	eio__realpath (struct tmpbuf tmpbuf, eio_wd wd, const char path)	963	eio__realpath (struct etp_tmpbuf tmpbuf, eio_wd wd, const char path)
1390	{	964	{
		965	char *res;
1391	const char *rel = path;	966	const char *rel = path;
1392	char *res;
1393	char tmp1, tmp2;	967	char tmp1, tmp2;
1394	#if SYMLOOP_MAX > 32	968	#if SYMLOOP_MAX > 32
1395	int symlinks = SYMLOOP_MAX;	969	int symlinks = SYMLOOP_MAX;
1396	#else	970	#else
1397	int symlinks = 32;	971	int symlinks = 32;
…		…
1403		977
1404	errno = ENOENT;	978	errno = ENOENT;
1405	if (!*rel)	979	if (!*rel)
1406	return -1;	980	return -1;
1407		981
1408	res = tmpbuf_get (tmpbuf, PATH_MAX * 3);	982	res = etp_tmpbuf_get (tmpbuf, PATH_MAX * 3);
		983	#ifdef _WIN32
		984	if (_access (rel, 4) != 0)
		985	return -1;
		986
		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
1409	tmp1 = res + PATH_MAX;	1000	tmp1 = res + PATH_MAX;
1410	tmp2 = tmp1 + PATH_MAX;	1001	tmp2 = tmp1 + PATH_MAX;
1411		1002
1412	#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 */
1413	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)	1004	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
…		…
1417		1008
1418	if (fd >= 0)	1009	if (fd >= 0)
1419	{	1010	{
1420	sprintf (tmp1, "/proc/self/fd/%d", fd);	1011	sprintf (tmp1, "/proc/self/fd/%d", fd);
1421	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 */
1422	close (fd);	1014	close (fd);
1423
1424	/* here we should probably stat the open file and the disk file, to make sure they still match */
1425		1015
1426	if (req->result > 0)	1016	if (req->result > 0)
1427	goto done;	1017	goto done;
1428	}	1018	}
1429	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)
1430	return;	1020	return -1;
1431	}	1021	}
1432	#endif	1022	#endif
1433	#endif	1023	#endif
1434		1024
1435	if (*rel != '/')	1025	if (*rel != '/')
…		…
1487	}	1077	}
1488	}	1078	}
1489		1079
1490	errno = ENAMETOOLONG;	1080	errno = ENAMETOOLONG;
1491	if (res + 1 + len + 1 >= tmp1)	1081	if (res + 1 + len + 1 >= tmp1)
1492	return;	1082	return -1;
1493		1083
1494	/* copy one component */	1084	/* copy one component */
1495	*res = '/';	1085	*res = '/';
1496	memcpy (res + 1, beg, len);	1086	memcpy (res + 1, beg, len);
1497		1087
…		…
1537	/* special case for the lone root path */	1127	/* special case for the lone root path */
1538	if (res == tmpbuf->ptr)	1128	if (res == tmpbuf->ptr)
1539	*res++ = '/';	1129	*res++ = '/';
1540		1130
1541	return res - (char *)tmpbuf->ptr;	1131	return res - (char *)tmpbuf->ptr;
		1132	#endif
1542	}	1133	}
1543		1134
1544	static signed char	1135	static signed char
1545	eio_dent_cmp (const eio_dirent a, const eio_dirent b)	1136	eio_dent_cmp (const eio_dirent a, const eio_dirent b)
1546	{	1137	{
…		…
1919	#ifdef DT_FIFO	1510	#ifdef DT_FIFO
1920	case DT_FIFO: ent->type = EIO_DT_FIFO; break;	1511	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
1921	#endif	1512	#endif
1922	#ifdef DT_CHR	1513	#ifdef DT_CHR
1923	case DT_CHR: ent->type = EIO_DT_CHR; break;	1514	case DT_CHR: ent->type = EIO_DT_CHR; break;
1924	#endif	1515	#endif
1925	#ifdef DT_MPC	1516	#ifdef DT_MPC
1926	case DT_MPC: ent->type = EIO_DT_MPC; break;	1517	case DT_MPC: ent->type = EIO_DT_MPC; break;
1927	#endif	1518	#endif
1928	#ifdef DT_DIR	1519	#ifdef DT_DIR
1929	case DT_DIR: ent->type = EIO_DT_DIR; break;	1520	case DT_DIR: ent->type = EIO_DT_DIR; break;
1930	#endif	1521	#endif
1931	#ifdef DT_NAM	1522	#ifdef DT_NAM
1932	case DT_NAM: ent->type = EIO_DT_NAM; break;	1523	case DT_NAM: ent->type = EIO_DT_NAM; break;
1933	#endif	1524	#endif
1934	#ifdef DT_BLK	1525	#ifdef DT_BLK
1935	case DT_BLK: ent->type = EIO_DT_BLK; break;	1526	case DT_BLK: ent->type = EIO_DT_BLK; break;
1936	#endif	1527	#endif
1937	#ifdef DT_MPB	1528	#ifdef DT_MPB
1938	case DT_MPB: ent->type = EIO_DT_MPB; break;	1529	case DT_MPB: ent->type = EIO_DT_MPB; break;
1939	#endif	1530	#endif
1940	#ifdef DT_REG	1531	#ifdef DT_REG
1941	case DT_REG: ent->type = EIO_DT_REG; break;	1532	case DT_REG: ent->type = EIO_DT_REG; break;
1942	#endif	1533	#endif
1943	#ifdef DT_NWK	1534	#ifdef DT_NWK
1944	case DT_NWK: ent->type = EIO_DT_NWK; break;	1535	case DT_NWK: ent->type = EIO_DT_NWK; break;
1945	#endif	1536	#endif
1946	#ifdef DT_CMP	1537	#ifdef DT_CMP
1947	case DT_CMP: ent->type = EIO_DT_CMP; break;	1538	case DT_CMP: ent->type = EIO_DT_CMP; break;
1948	#endif	1539	#endif
1949	#ifdef DT_LNK	1540	#ifdef DT_LNK
1950	case DT_LNK: ent->type = EIO_DT_LNK; break;	1541	case DT_LNK: ent->type = EIO_DT_LNK; break;
1951	#endif	1542	#endif
1952	#ifdef DT_SOCK	1543	#ifdef DT_SOCK
1953	case DT_SOCK: ent->type = EIO_DT_SOCK; break;	1544	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
…		…
1966	{	1557	{
1967	if (ent->type == EIO_DT_UNKNOWN)	1558	if (ent->type == EIO_DT_UNKNOWN)
1968	{	1559	{
1969	if (name == '.') / leading dots are likely directories, and, in any case, rare */	1560	if (name == '.') / leading dots are likely directories, and, in any case, rare */
1970	ent->score = 1;	1561	ent->score = 1;
1971	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */	1562	else if (!strchr (name, '.')) /* absence of dots indicate likely dirs */
1972	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */	1563	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
1973	}	1564	}
1974	else if (ent->type == EIO_DT_DIR)	1565	else if (ent->type == EIO_DT_DIR)
1975	ent->score = 0;	1566	ent->score = 0;
1976	}	1567	}
…		…
2005	#if !HAVE_AT	1596	#if !HAVE_AT
2006		1597
2007	/* a bit like realpath, but usually faster because it doesn'T have to return */	1598	/* a bit like realpath, but usually faster because it doesn'T have to return */
2008	/* an absolute or canonical path */	1599	/* an absolute or canonical path */
2009	static const char *	1600	static const char *
2010	wd_expand (struct tmpbuf tmpbuf, eio_wd wd, const char path)	1601	wd_expand (struct etp_tmpbuf tmpbuf, eio_wd wd, const char path)
2011	{	1602	{
2012	if (!wd \|\| *path == '/')	1603	if (!wd \|\| *path == '/')
2013	return path;	1604	return path;
2014		1605
2015	if (path [0] == '.' && !path [1])	1606	if (path [0] == '.' && !path [1])
…		…
2017		1608
2018	{	1609	{
2019	int l1 = wd->len;	1610	int l1 = wd->len;
2020	int l2 = strlen (path);	1611	int l2 = strlen (path);
2021		1612
2022	char *res = tmpbuf_get (tmpbuf, l1 + l2 + 2);	1613	char *res = etp_tmpbuf_get (tmpbuf, l1 + l2 + 2);
2023		1614
2024	memcpy (res, wd->str, l1);	1615	memcpy (res, wd->str, l1);
2025	res [l1] = '/';	1616	res [l1] = '/';
2026	memcpy (res + l1 + 1, path, l2 + 1);	1617	memcpy (res + l1 + 1, path, l2 + 1);
2027		1618
…		…
2030	}	1621	}
2031		1622
2032	#endif	1623	#endif
2033		1624
2034	static eio_wd	1625	static eio_wd
2035	eio__wd_open_sync (struct tmpbuf tmpbuf, eio_wd wd, const char path)	1626	eio__wd_open_sync (struct etp_tmpbuf tmpbuf, eio_wd wd, const char path)
2036	{	1627	{
2037	int fd;	1628	int fd;
2038	eio_wd res;	1629	eio_wd res;
2039	int len = eio__realpath (tmpbuf, wd, path);	1630	int len = eio__realpath (tmpbuf, wd, path);
2040		1631
…		…
2062	}	1653	}
2063		1654
2064	eio_wd	1655	eio_wd
2065	eio_wd_open_sync (eio_wd wd, const char *path)	1656	eio_wd_open_sync (eio_wd wd, const char *path)
2066	{	1657	{
2067	struct tmpbuf tmpbuf = { 0 };	1658	struct etp_tmpbuf tmpbuf = { };
2068	wd = eio__wd_open_sync (&tmpbuf, wd, path);	1659	wd = eio__wd_open_sync (&tmpbuf, wd, path);
2069	free (tmpbuf.ptr);	1660	free (tmpbuf.ptr);
2070		1661
2071	return wd;	1662	return wd;
2072	}	1663	}
…		…
2121	/*****************************************************************************/	1712	/*****************************************************************************/
2122		1713
2123	#define ALLOC(len) \	1714	#define ALLOC(len) \
2124	if (!req->ptr2) \	1715	if (!req->ptr2) \
2125	{ \	1716	{ \
2126	X_LOCK (wrklock); \	1717	X_LOCK (EIO_POOL->wrklock); \
2127	req->flags \|= EIO_FLAG_PTR2_FREE; \	1718	req->flags \|= EIO_FLAG_PTR2_FREE; \
2128	X_UNLOCK (wrklock); \	1719	X_UNLOCK (EIO_POOL->wrklock); \
2129	req->ptr2 = malloc (len); \	1720	req->ptr2 = malloc (len); \
2130	if (!req->ptr2) \	1721	if (!req->ptr2) \
2131	{ \	1722	{ \
2132	errno = ENOMEM; \	1723	errno = ENOMEM; \
2133	req->result = -1; \	1724	req->result = -1; \
2134	break; \	1725	break; \
2135	} \	1726	} \
2136	}	1727	}
2137		1728
2138	X_THREAD_PROC (etp_proc)
2139	{
2140	ETP_REQ *req;
2141	struct timespec ts;
2142	etp_worker self = (etp_worker )thr_arg;
2143
2144	#if HAVE_PRCTL_SET_NAME
2145	prctl (PR_SET_NAME, (unsigned long)"eio_thread", 0, 0, 0);
2146	#endif
2147
2148	/* try to distribute timeouts somewhat evenly */
2149	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
2150
2151	for (;;)
2152	{
2153	ts.tv_sec = 0;
2154
2155	X_LOCK (reqlock);
2156
2157	for (;;)
2158	{
2159	req = reqq_shift (&req_queue);
2160
2161	if (req)
2162	break;
2163
2164	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
2165	{
2166	X_UNLOCK (reqlock);
2167	X_LOCK (wrklock);
2168	--started;
2169	X_UNLOCK (wrklock);
2170	goto quit;
2171	}
2172
2173	++idle;
2174
2175	if (idle <= max_idle)
2176	/* we are allowed to idle, so do so without any timeout */
2177	X_COND_WAIT (reqwait, reqlock);
2178	else
2179	{
2180	/* initialise timeout once */
2181	if (!ts.tv_sec)
2182	ts.tv_sec = time (0) + idle_timeout;
2183
2184	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
2185	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
2186	}
2187
2188	--idle;
2189	}
2190
2191	--nready;
2192
2193	X_UNLOCK (reqlock);
2194
2195	if (req->type < 0)
2196	goto quit;
2197
2198	ETP_EXECUTE (self, req);
2199
2200	X_LOCK (reslock);
2201
2202	++npending;
2203
2204	if (!reqq_push (&res_queue, req) && want_poll_cb)
2205	want_poll_cb ();
2206
2207	etp_worker_clear (self);
2208
2209	X_UNLOCK (reslock);
2210	}
2211
2212	quit:
2213	free (req);
2214
2215	X_LOCK (wrklock);
2216	etp_worker_free (self);
2217	X_UNLOCK (wrklock);
2218
2219	return 0;
2220	}
2221
2222	/*****************************************************************************/	1729	/*****************************************************************************/
2223		1730
2224	int ecb_cold	1731	int ecb_cold
2225	eio_init (void (want_poll)(void), void (done_poll)(void))	1732	eio_init (void (want_poll)(void), void (done_poll)(void))
2226	{	1733	{
2227	#if !HAVE_PREADWRITE	1734	eio_want_poll_cb = want_poll;
2228	X_MUTEX_CREATE (preadwritelock);	1735	eio_done_poll_cb = done_poll;
2229	#endif
2230		1736
2231	return etp_init (want_poll, done_poll);	1737	return etp_init (EIO_POOL, 0, 0, 0);
2232	}	1738	}
2233		1739
2234	ecb_inline void	1740	ecb_inline void
2235	eio_api_destroy (eio_req *req)	1741	eio_api_destroy (eio_req *req)
2236	{	1742	{
2237	free (req);	1743	free (req);
2238	}	1744	}
2239		1745
2240	#define REQ(rtype) \	1746	#define REQ(rtype) \
2241	eio_req *req; \	1747	eio_req *req; \
2242	\	1748	\
2243	req = (eio_req )calloc (1, sizeof req); \	1749	req = (eio_req )calloc (1, sizeof req); \
2244	if (!req) \	1750	if (!req) \
2245	return 0; \	1751	return 0; \
…		…
2259	{ \	1765	{ \
2260	eio_api_destroy (req); \	1766	eio_api_destroy (req); \
2261	return 0; \	1767	return 0; \
2262	}	1768	}
2263		1769
		1770	#define SINGLEDOT(ptr) (0[(char )(ptr)] == '.' && !1[(char )(ptr)])
		1771
2264	static void	1772	static void
2265	eio_execute (etp_worker self, eio_req req)	1773	eio_execute (etp_worker self, eio_req req)
2266	{	1774	{
2267	#if HAVE_AT	1775	#if HAVE_AT
2268	int dirfd;	1776	int dirfd;
…		…
2299	req->result = req->wd == EIO_INVALID_WD ? -1 : 0;	1807	req->result = req->wd == EIO_INVALID_WD ? -1 : 0;
2300	break;	1808	break;
2301	case EIO_WD_CLOSE: req->result = 0;	1809	case EIO_WD_CLOSE: req->result = 0;
2302	eio_wd_close_sync (req->wd); break;	1810	eio_wd_close_sync (req->wd); break;
2303		1811
		1812	case EIO_SEEK: eio__lseek (req); break;
2304	case EIO_READ: ALLOC (req->size);	1813	case EIO_READ: ALLOC (req->size);
2305	req->result = req->offs >= 0	1814	req->result = req->offs >= 0
2306	? pread (req->int1, req->ptr2, req->size, req->offs)	1815	? pread (req->int1, req->ptr2, req->size, req->offs)
2307	: read (req->int1, req->ptr2, req->size); break;	1816	: read (req->int1, req->ptr2, req->size); break;
2308	case EIO_WRITE: req->result = req->offs >= 0	1817	case EIO_WRITE: req->result = req->offs >= 0
…		…
2322	case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break;	1831	case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break;
2323	case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break;	1832	case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break;
2324	case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break;	1833	case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break;
2325		1834
2326	case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break;	1835	case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break;
2327	case EIO_RMDIR: req->result = unlinkat (dirfd, req->ptr1, AT_REMOVEDIR); 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;
2328	case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break;	1840	case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break;
2329	case EIO_RENAME: req->result = renameat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2); 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;
2330	case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break;	1845	case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break;
2331	case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break;	1846	case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break;
2332	case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;	1847	case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
2333	case EIO_READLINK: ALLOC (PATH_MAX);	1848	case EIO_READLINK: ALLOC (PATH_MAX);
2334	req->result = readlinkat (dirfd, req->ptr1, req->ptr2, PATH_MAX); break;	1849	req->result = readlinkat (dirfd, req->ptr1, req->ptr2, PATH_MAX); break;
…		…
2452	req->result = select (0, 0, 0, 0, &tv);	1967	req->result = select (0, 0, 0, 0, &tv);
2453	}	1968	}
2454	#endif	1969	#endif
2455	break;	1970	break;
2456		1971
		1972	#if 0
2457	case EIO_GROUP:	1973	case EIO_GROUP:
2458	abort (); /* handled in eio_request */	1974	abort (); /* handled in eio_request */
		1975	#endif
2459		1976
2460	case EIO_NOP:	1977	case EIO_NOP:
2461	req->result = 0;	1978	req->result = 0;
2462	break;	1979	break;
2463		1980
2464	case EIO_CUSTOM:	1981	case EIO_CUSTOM:
2465	req->feed (req);	1982	req->feed (req);
2466	break;	1983	break;
2467		1984
2468	default:	1985	default:
2469	errno = ENOSYS;
2470	req->result = -1;	1986	req->result = EIO_ENOSYS ();
2471	break;	1987	break;
2472	}	1988	}
2473		1989
2474	req->errorno = errno;	1990	req->errorno = errno;
2475	}	1991	}
…		…
2552	}	2068	}
2553		2069
2554	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)
2555	{	2071	{
2556	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;
2557	}	2078	}
2558		2079
2559	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)
2560	{	2081	{
2561	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;
…		…
2759	void	2280	void
2760	eio_grp_add (eio_req grp, eio_req req)	2281	eio_grp_add (eio_req grp, eio_req req)
2761	{	2282	{
2762	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));
2763		2284
2764	grp->flags \|= EIO_FLAG_GROUPADD;	2285	grp->flags \|= ETP_FLAG_GROUPADD;
2765		2286
2766	++grp->size;	2287	++grp->size;
2767	req->grp = grp;	2288	req->grp = grp;
2768		2289
2769	req->grp_prev = 0;	2290	req->grp_prev = 0;

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Comparing libeio/eio.c (file contents): Revision 1.110 by root, Tue Sep 27 12:36:19 2011 UTC vs. Revision 1.139 by root, Thu Jun 25 18:14:19 2015 UTC

Diff Legend

Comparing libeio/eio.c (file contents):
Revision 1.110 by root, Tue Sep 27 12:36:19 2011 UTC vs.
Revision 1.139 by root, Thu Jun 25 18:14:19 2015 UTC