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Comparing cvsroot/libeio/eio.c (file contents):
Revision 1.66 by root, Sun Jun 5 19:58:37 2011 UTC vs.
Revision 1.92 by root, Sun Jul 17 18:27:17 2011 UTC

…		…
40	#ifndef _WIN32	40	#ifndef _WIN32
41	# include "config.h"	41	# include "config.h"
42	#endif	42	#endif
43		43
44	#include "eio.h"	44	#include "eio.h"
		45	#include "ecb.h"
45		46
46	#ifdef EIO_STACKSIZE	47	#ifdef EIO_STACKSIZE
47	# define XTHREAD_STACKSIZE EIO_STACKSIZE	48	# define XTHREAD_STACKSIZE EIO_STACKSIZE
48	#endif	49	#endif
49	#include "xthread.h"	50	#include "xthread.h"
…		…
53	#include <stdlib.h>	54	#include <stdlib.h>
54	#include <string.h>	55	#include <string.h>
55	#include <errno.h>	56	#include <errno.h>
56	#include <sys/types.h>	57	#include <sys/types.h>
57	#include <sys/stat.h>	58	#include <sys/stat.h>
58	#include <sys/statvfs.h>
59	#include <limits.h>	59	#include <limits.h>
60	#include <fcntl.h>	60	#include <fcntl.h>
61	#include <assert.h>	61	#include <assert.h>
62		62
63	/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */	63	/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */
64	/* intptr_t only comes form stdint.h, says idiot openbsd coder */	64	/* intptr_t only comes from stdint.h, says idiot openbsd coder */
65	#if HAVE_STDINT_H	65	#if HAVE_STDINT_H
66	# include <stdint.h>	66	# include <stdint.h>
67	#endif	67	#endif
68		68
		69	#ifndef ECANCELED
		70	# define ECANCELED EDOM
		71	#endif
		72	#ifndef ELOOP
		73	# define ELOOP EDOM
		74	#endif
		75
		76	static void eio_destroy (eio_req *req);
		77
69	#ifndef EIO_FINISH	78	#ifndef EIO_FINISH
70	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	79	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
71	#endif	80	#endif
72		81
73	#ifndef EIO_DESTROY	82	#ifndef EIO_DESTROY
…		…
76		85
77	#ifndef EIO_FEED	86	#ifndef EIO_FEED
78	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)	87	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)
79	#endif	88	#endif
80		89
		90	#ifndef EIO_FD_TO_WIN32_HANDLE
		91	# define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		92	#endif
		93	#ifndef EIO_WIN32_HANDLE_TO_FD
		94	# define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		95	#endif
		96
		97	#define EIO_ERRNO(errval,retval) ((errno = errval), retval)
		98
		99	#define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1)
		100
81	#ifdef _WIN32	101	#ifdef _WIN32
82		102
83	/*doh*/	103	#undef PAGESIZE
		104	#define PAGESIZE 4096 /* GetSystemInfo? */
		105
		106	#ifdef EIO_STRUCT_STATI64
		107	#define stat(path,buf) _stati64 (path,buf)
		108	#define fstat(fd,buf) _fstati64 (path,buf)
		109	#endif
		110	#define lstat(path,buf) stat (path,buf)
		111	#define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
		112	#define mkdir(path,mode) _mkdir (path)
		113	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
		114
		115	#define chmod(path,mode) _chmod (path, mode)
		116	#define dup(fd) _dup (fd)
		117	#define dup2(fd1,fd2) _dup2 (fd1, fd2)
		118
		119	#define fchmod(fd,mode) EIO_ENOSYS ()
		120	#define chown(path,uid,gid) EIO_ENOSYS ()
		121	#define fchown(fd,uid,gid) EIO_ENOSYS ()
		122	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
		123	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
		124	#define mknod(path,mode,dev) EIO_ENOSYS ()
		125	#define sync() EIO_ENOSYS ()
		126	#define readlink(path,buf,s) EIO_ENOSYS ()
		127	#define statvfs(path,buf) EIO_ENOSYS ()
		128	#define fstatvfs(fd,buf) EIO_ENOSYS ()
		129
		130	/* we could even stat and see if it exists */
		131	static int
		132	symlink (const char *old, const char *neu)
		133	{
		134	#if WINVER >= 0x0600
		135	if (CreateSymbolicLink (neu, old, 1))
		136	return 0;
		137
		138	if (CreateSymbolicLink (neu, old, 0))
		139	return 0;
		140	#endif
		141
		142	return EIO_ERRNO (ENOENT, -1);
		143	}
		144
		145	/* POSIX API only */
		146	#define CreateHardLink(neu,old,flags) 0
		147	#define CreateSymbolicLink(neu,old,flags) 0
		148
		149	struct statvfs
		150	{
		151	int dummy;
		152	};
		153
		154	#define DT_DIR EIO_DT_DIR
		155	#define DT_REG EIO_DT_REG
		156	#define D_NAME(entp) entp.cFileName
		157	#define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG)
		158
84	#else	159	#else
85		160
86	# include <sys/time.h>	161	#include <sys/time.h>
87	# include <sys/select.h>	162	#include <sys/select.h>
		163	#include <sys/statvfs.h>
88	# include <unistd.h>	164	#include <unistd.h>
89	# include <utime.h>	165	#include <utime.h>
90	# include <signal.h>	166	#include <signal.h>
91	# include <dirent.h>	167	#include <dirent.h>
92		168
93	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES	169	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
94	# include <sys/mman.h>	170	#include <sys/mman.h>
95	#endif	171	#endif
96		172
		173	#define D_NAME(entp) entp->d_name
		174
97	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */	175	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
98	# if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__	176	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
99	# define _DIRENT_HAVE_D_TYPE /* sigh */	177	#define _DIRENT_HAVE_D_TYPE /* sigh */
100	# define D_INO(de) (de)->d_fileno	178	#define D_INO(de) (de)->d_fileno
101	# define D_NAMLEN(de) (de)->d_namlen	179	#define D_NAMLEN(de) (de)->d_namlen
102	# elif __linux || defined d_ino || _XOPEN_SOURCE >= 600	180	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
103	# define D_INO(de) (de)->d_ino	181	#define D_INO(de) (de)->d_ino
104	# endif	182	#endif
105		183
106	#ifdef _D_EXACT_NAMLEN	184	#ifdef _D_EXACT_NAMLEN
107	# undef D_NAMLEN	185	#undef D_NAMLEN
108	# define D_NAMLEN(de) _D_EXACT_NAMLEN (de)	186	#define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
109	#endif	187	#endif
110		188
111	# ifdef _DIRENT_HAVE_D_TYPE	189	#ifdef _DIRENT_HAVE_D_TYPE
112	# define D_TYPE(de) (de)->d_type	190	#define D_TYPE(de) (de)->d_type
113	# endif	191	#endif
114		192
115	# ifndef EIO_STRUCT_DIRENT	193	#ifndef EIO_STRUCT_DIRENT
116	# define EIO_STRUCT_DIRENT struct dirent	194	#define EIO_STRUCT_DIRENT struct dirent
117	# endif	195	#endif
118		196
119	#endif	197	#endif
120		198
121	#if HAVE_SENDFILE	199	#if HAVE_SENDFILE
122	# if __linux	200	# if __linux
…		…
138	#endif	216	#endif
139	#ifndef D_INO	217	#ifndef D_INO
140	# define D_INO(de) 0	218	# define D_INO(de) 0
141	#endif	219	#endif
142	#ifndef D_NAMLEN	220	#ifndef D_NAMLEN
143	# define D_NAMLEN(de) strlen ((de)->d_name)	221	# define D_NAMLEN(entp) strlen (D_NAME (entp))
144	#endif	222	#endif
145		223
146	/* used for struct dirent, AIX doesn't provide it */	224	/* used for struct dirent, AIX doesn't provide it */
147	#ifndef NAME_MAX	225	#ifndef NAME_MAX
148	# define NAME_MAX 4096	226	# define NAME_MAX 4096
…		…
165	if (!eio_buf) \	243	if (!eio_buf) \
166	return -1;	244	return -1;
167		245
168	#define EIO_TICKS ((1000000 + 1023) >> 10)	246	#define EIO_TICKS ((1000000 + 1023) >> 10)
169		247
170	/*****************************************************************************/
171
172	#if __GNUC__ >= 3
173	# define expect(expr,value) __builtin_expect ((expr),(value))
174	#else
175	# define expect(expr,value) (expr)
176	#endif
177
178	#define expect_false(expr) expect ((expr) != 0, 0)
179	#define expect_true(expr) expect ((expr) != 0, 1)
180
181	/*****************************************************************************/
182
183	#define ETP_PRI_MIN EIO_PRI_MIN	248	#define ETP_PRI_MIN EIO_PRI_MIN
184	#define ETP_PRI_MAX EIO_PRI_MAX	249	#define ETP_PRI_MAX EIO_PRI_MAX
185		250
186	struct etp_worker;	251	struct etp_worker;
187		252
…		…
195	#define ETP_WORKER_CLEAR(req) \	260	#define ETP_WORKER_CLEAR(req) \
196	if (wrk->dbuf) \	261	if (wrk->dbuf) \
197	{ \	262	{ \
198	free (wrk->dbuf); \	263	free (wrk->dbuf); \
199	wrk->dbuf = 0; \	264	wrk->dbuf = 0; \
200	} \
201	\
202	if (wrk->dirp) \
203	{ \
204	closedir (wrk->dirp); \
205	wrk->dirp = 0; \
206	}	265	}
207		266
208	#define ETP_WORKER_COMMON \	267	#define ETP_WORKER_COMMON \
209	void *dbuf; \	268	void *dbuf;
210	DIR *dirp;
211		269
212	/*****************************************************************************/	270	/*****************************************************************************/
213		271
214	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)	272	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
215		273
216	/* calculate time difference in ~1/EIO_TICKS of a second */	274	/* calculate time difference in ~1/EIO_TICKS of a second */
		275	ecb_inline int
217	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	276	tvdiff (struct timeval *tv1, struct timeval *tv2)
218	{	277	{
219	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	278	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
220	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);	279	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
221	}	280	}
222		281
…		…
266	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)	325	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
267	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)	326	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
268		327
269	/* worker threads management */	328	/* worker threads management */
270		329
		330	static void ecb_cold
271	static void etp_worker_clear (etp_worker *wrk)	331	etp_worker_clear (etp_worker *wrk)
272	{	332	{
273	ETP_WORKER_CLEAR (wrk);	333	ETP_WORKER_CLEAR (wrk);
274	}	334	}
275		335
		336	static void ecb_cold
276	static void etp_worker_free (etp_worker *wrk)	337	etp_worker_free (etp_worker *wrk)
277	{	338	{
278	wrk->next->prev = wrk->prev;	339	wrk->next->prev = wrk->prev;
279	wrk->prev->next = wrk->next;	340	wrk->prev->next = wrk->next;
280		341
281	free (wrk);	342	free (wrk);
282	}	343	}
283		344
284	static unsigned int etp_nreqs (void)	345	static unsigned int
		346	etp_nreqs (void)
285	{	347	{
286	int retval;	348	int retval;
287	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	349	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
288	retval = nreqs;	350	retval = nreqs;
289	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	351	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
290	return retval;	352	return retval;
291	}	353	}
292		354
293	static unsigned int etp_nready (void)	355	static unsigned int
		356	etp_nready (void)
294	{	357	{
295	unsigned int retval;	358	unsigned int retval;
296		359
297	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	360	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
298	retval = nready;	361	retval = nready;
299	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	362	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
300		363
301	return retval;	364	return retval;
302	}	365	}
303		366
304	static unsigned int etp_npending (void)	367	static unsigned int
		368	etp_npending (void)
305	{	369	{
306	unsigned int retval;	370	unsigned int retval;
307		371
308	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	372	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
309	retval = npending;	373	retval = npending;
310	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	374	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
311		375
312	return retval;	376	return retval;
313	}	377	}
314		378
315	static unsigned int etp_nthreads (void)	379	static unsigned int
		380	etp_nthreads (void)
316	{	381	{
317	unsigned int retval;	382	unsigned int retval;
318		383
319	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	384	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
320	retval = started;	385	retval = started;
…		…
334	} etp_reqq;	399	} etp_reqq;
335		400
336	static etp_reqq req_queue;	401	static etp_reqq req_queue;
337	static etp_reqq res_queue;	402	static etp_reqq res_queue;
338		403
		404	static void ecb_noinline ecb_cold
		405	reqq_init (etp_reqq *q)
		406	{
		407	int pri;
		408
		409	for (pri = 0; pri < ETP_NUM_PRI; ++pri)
		410	q->qs[pri] = q->qe[pri] = 0;
		411
		412	q->size = 0;
		413	}
		414
		415	static int ecb_noinline
339	static int reqq_push (etp_reqq *q, ETP_REQ *req)	416	reqq_push (etp_reqq *q, ETP_REQ *req)
340	{	417	{
341	int pri = req->pri;	418	int pri = req->pri;
342	req->next = 0;	419	req->next = 0;
343		420
344	if (q->qe[pri])	421	if (q->qe[pri])
…		…
350	q->qe[pri] = q->qs[pri] = req;	427	q->qe[pri] = q->qs[pri] = req;
351		428
352	return q->size++;	429	return q->size++;
353	}	430	}
354		431
		432	static ETP_REQ * ecb_noinline
355	static ETP_REQ *reqq_shift (etp_reqq *q)	433	reqq_shift (etp_reqq *q)
356	{	434	{
357	int pri;	435	int pri;
358		436
359	if (!q->size)	437	if (!q->size)
360	return 0;	438	return 0;
…		…
375	}	453	}
376		454
377	abort ();	455	abort ();
378	}	456	}
379		457
		458	static void ecb_cold
380	static void etp_thread_init (void)	459	etp_thread_init (void)
381	{	460	{
		461	#if !HAVE_PREADWRITE
		462	X_MUTEX_CREATE (preadwritelock);
		463	#endif
382	X_MUTEX_CREATE (wrklock);	464	X_MUTEX_CREATE (wrklock);
383	X_MUTEX_CREATE (reslock);	465	X_MUTEX_CREATE (reslock);
384	X_MUTEX_CREATE (reqlock);	466	X_MUTEX_CREATE (reqlock);
385	X_COND_CREATE (reqwait);	467	X_COND_CREATE (reqwait);
386	}	468	}
387		469
388	static void etp_atfork_prepare (void)	470	static void ecb_cold
389	{
390	X_LOCK (wrklock);
391	X_LOCK (reqlock);
392	X_LOCK (reslock);
393	#if !HAVE_PREADWRITE
394	X_LOCK (preadwritelock);
395	#endif
396	}
397
398	static void etp_atfork_parent (void)
399	{
400	#if !HAVE_PREADWRITE
401	X_UNLOCK (preadwritelock);
402	#endif
403	X_UNLOCK (reslock);
404	X_UNLOCK (reqlock);
405	X_UNLOCK (wrklock);
406	}
407
408	static void etp_atfork_child (void)	471	etp_atfork_child (void)
409	{	472	{
410	ETP_REQ *prv;	473	reqq_init (&req_queue);
		474	reqq_init (&res_queue);
411		475
412	while ((prv = reqq_shift (&req_queue)))	476	wrk_first.next =
413	ETP_DESTROY (prv);	477	wrk_first.prev = &wrk_first;
414
415	while ((prv = reqq_shift (&res_queue)))
416	ETP_DESTROY (prv);
417
418	while (wrk_first.next != &wrk_first)
419	{
420	etp_worker *wrk = wrk_first.next;
421
422	if (wrk->req)
423	ETP_DESTROY (wrk->req);
424
425	etp_worker_clear (wrk);
426	etp_worker_free (wrk);
427	}
428		478
429	started = 0;	479	started = 0;
430	idle = 0;	480	idle = 0;
431	nreqs = 0;	481	nreqs = 0;
432	nready = 0;	482	nready = 0;
433	npending = 0;	483	npending = 0;
434		484
435	etp_thread_init ();	485	etp_thread_init ();
436	}	486	}
437		487
438	static void	488	static void ecb_cold
439	etp_once_init (void)	489	etp_once_init (void)
440	{	490	{
441	etp_thread_init ();	491	etp_thread_init ();
442	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);	492	X_THREAD_ATFORK (0, 0, etp_atfork_child);
443	}	493	}
444		494
445	static int	495	static int ecb_cold
446	etp_init (void (*want_poll)(void), void (*done_poll)(void))	496	etp_init (void (*want_poll)(void), void (*done_poll)(void))
447	{	497	{
448	static pthread_once_t doinit = PTHREAD_ONCE_INIT;	498	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
449		499
450	pthread_once (&doinit, etp_once_init);	500	pthread_once (&doinit, etp_once_init);
…		…
455	return 0;	505	return 0;
456	}	506	}
457		507
458	X_THREAD_PROC (etp_proc);	508	X_THREAD_PROC (etp_proc);
459		509
		510	static void ecb_cold
460	static void etp_start_thread (void)	511	etp_start_thread (void)
461	{	512	{
462	etp_worker *wrk = calloc (1, sizeof (etp_worker));	513	etp_worker *wrk = calloc (1, sizeof (etp_worker));
463		514
464	/*TODO*/	515	/*TODO*/
465	assert (("unable to allocate worker thread data", wrk));	516	assert (("unable to allocate worker thread data", wrk));
…		…
478	free (wrk);	529	free (wrk);
479		530
480	X_UNLOCK (wrklock);	531	X_UNLOCK (wrklock);
481	}	532	}
482		533
		534	static void
483	static void etp_maybe_start_thread (void)	535	etp_maybe_start_thread (void)
484	{	536	{
485	if (expect_true (etp_nthreads () >= wanted))	537	if (ecb_expect_true (etp_nthreads () >= wanted))
486	return;	538	return;
487		539
488	/* todo: maybe use idle here, but might be less exact */	540	/* todo: maybe use idle here, but might be less exact */
489	if (expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))	541	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
490	return;	542	return;
491		543
492	etp_start_thread ();	544	etp_start_thread ();
493	}	545	}
494		546
		547	static void ecb_cold
495	static void etp_end_thread (void)	548	etp_end_thread (void)
496	{	549	{
497	eio_req *req = calloc (1, sizeof (eio_req));	550	eio_req *req = calloc (1, sizeof (eio_req));
498		551
499	req->type = -1;	552	req->type = -1;
500	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;	553	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
…		…
507	X_LOCK (wrklock);	560	X_LOCK (wrklock);
508	--started;	561	--started;
509	X_UNLOCK (wrklock);	562	X_UNLOCK (wrklock);
510	}	563	}
511		564
512	static int etp_poll (void)	565	static int
		566	etp_poll (void)
513	{	567	{
514	unsigned int maxreqs;	568	unsigned int maxreqs;
515	unsigned int maxtime;	569	unsigned int maxtime;
516	struct timeval tv_start, tv_now;	570	struct timeval tv_start, tv_now;
517		571
…		…
547		601
548	X_LOCK (reqlock);	602	X_LOCK (reqlock);
549	--nreqs;	603	--nreqs;
550	X_UNLOCK (reqlock);	604	X_UNLOCK (reqlock);
551		605
552	if (expect_false (req->type == EIO_GROUP && req->size))	606	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
553	{	607	{
554	req->int1 = 1; /* mark request as delayed */	608	req->int1 = 1; /* mark request as delayed */
555	continue;	609	continue;
556	}	610	}
557	else	611	else
558	{	612	{
559	int res = ETP_FINISH (req);	613	int res = ETP_FINISH (req);
560	if (expect_false (res))	614	if (ecb_expect_false (res))
561	return res;	615	return res;
562	}	616	}
563		617
564	if (expect_false (maxreqs && !--maxreqs))	618	if (ecb_expect_false (maxreqs && !--maxreqs))
565	break;	619	break;
566		620
567	if (maxtime)	621	if (maxtime)
568	{	622	{
569	gettimeofday (&tv_now, 0);	623	gettimeofday (&tv_now, 0);
…		…
575		629
576	errno = EAGAIN;	630	errno = EAGAIN;
577	return -1;	631	return -1;
578	}	632	}
579		633
		634	static void
580	static void etp_cancel (ETP_REQ *req)	635	etp_cancel (ETP_REQ *req)
581	{	636	{
582	X_LOCK (wrklock);	637	req->cancelled = 1;
583	req->flags |= EIO_FLAG_CANCELLED;
584	X_UNLOCK (wrklock);
585		638
586	eio_grp_cancel (req);	639	eio_grp_cancel (req);
587	}	640	}
588		641
		642	static void
589	static void etp_submit (ETP_REQ *req)	643	etp_submit (ETP_REQ *req)
590	{	644	{
591	req->pri -= ETP_PRI_MIN;	645	req->pri -= ETP_PRI_MIN;
592		646
593	if (expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;	647	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
594	if (expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;	648	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
595		649
596	if (expect_false (req->type == EIO_GROUP))	650	if (ecb_expect_false (req->type == EIO_GROUP))
597	{	651	{
598	/* I hope this is worth it :/ */	652	/* I hope this is worth it :/ */
599	X_LOCK (reqlock);	653	X_LOCK (reqlock);
600	++nreqs;	654	++nreqs;
601	X_UNLOCK (reqlock);	655	X_UNLOCK (reqlock);
…		…
620		674
621	etp_maybe_start_thread ();	675	etp_maybe_start_thread ();
622	}	676	}
623	}	677	}
624		678
		679	static void ecb_cold
625	static void etp_set_max_poll_time (double nseconds)	680	etp_set_max_poll_time (double nseconds)
626	{	681	{
627	if (WORDACCESS_UNSAFE) X_LOCK (reslock);	682	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
628	max_poll_time = nseconds * EIO_TICKS;	683	max_poll_time = nseconds * EIO_TICKS;
629	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);	684	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
630	}	685	}
631		686
		687	static void ecb_cold
632	static void etp_set_max_poll_reqs (unsigned int maxreqs)	688	etp_set_max_poll_reqs (unsigned int maxreqs)
633	{	689	{
634	if (WORDACCESS_UNSAFE) X_LOCK (reslock);	690	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
635	max_poll_reqs = maxreqs;	691	max_poll_reqs = maxreqs;
636	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);	692	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
637	}	693	}
638		694
		695	static void ecb_cold
639	static void etp_set_max_idle (unsigned int nthreads)	696	etp_set_max_idle (unsigned int nthreads)
640	{	697	{
641	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	698	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
642	max_idle = nthreads;	699	max_idle = nthreads;
643	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	700	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
644	}	701	}
645		702
		703	static void ecb_cold
646	static void etp_set_idle_timeout (unsigned int seconds)	704	etp_set_idle_timeout (unsigned int seconds)
647	{	705	{
648	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	706	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
649	idle_timeout = seconds;	707	idle_timeout = seconds;
650	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	708	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
651	}	709	}
652		710
		711	static void ecb_cold
653	static void etp_set_min_parallel (unsigned int nthreads)	712	etp_set_min_parallel (unsigned int nthreads)
654	{	713	{
655	if (wanted < nthreads)	714	if (wanted < nthreads)
656	wanted = nthreads;	715	wanted = nthreads;
657	}	716	}
658		717
		718	static void ecb_cold
659	static void etp_set_max_parallel (unsigned int nthreads)	719	etp_set_max_parallel (unsigned int nthreads)
660	{	720	{
661	if (wanted > nthreads)	721	if (wanted > nthreads)
662	wanted = nthreads;	722	wanted = nthreads;
663		723
664	while (started > wanted)	724	while (started > wanted)
665	etp_end_thread ();	725	etp_end_thread ();
666	}	726	}
667		727
668	/*****************************************************************************/	728	/*****************************************************************************/
669		729
		730	static void
670	static void grp_try_feed (eio_req *grp)	731	grp_try_feed (eio_req *grp)
671	{	732	{
672	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	733	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
673	{	734	{
674	grp->flags &= ~EIO_FLAG_GROUPADD;	735	grp->flags &= ~EIO_FLAG_GROUPADD;
675		736
…		…
682	break;	743	break;
683	}	744	}
684	}	745	}
685	}	746	}
686		747
		748	static int
687	static int grp_dec (eio_req *grp)	749	grp_dec (eio_req *grp)
688	{	750	{
689	--grp->size;	751	--grp->size;
690		752
691	/* call feeder, if applicable */	753	/* call feeder, if applicable */
692	grp_try_feed (grp);	754	grp_try_feed (grp);
…		…
696	return eio_finish (grp);	758	return eio_finish (grp);
697	else	759	else
698	return 0;	760	return 0;
699	}	761	}
700		762
		763	static void
701	void eio_destroy (eio_req *req)	764	eio_destroy (eio_req *req)
702	{	765	{
703	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);	766	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
704	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);	767	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
705		768
706	EIO_DESTROY (req);	769	EIO_DESTROY (req);
707	}	770	}
708		771
		772	static int
709	static int eio_finish (eio_req *req)	773	eio_finish (eio_req *req)
710	{	774	{
711	int res = EIO_FINISH (req);	775	int res = EIO_FINISH (req);
712		776
713	if (req->grp)	777	if (req->grp)
714	{	778	{
…		…
722	if (grp->grp_first == req)	786	if (grp->grp_first == req)
723	grp->grp_first = req->grp_next;	787	grp->grp_first = req->grp_next;
724		788
725	res2 = grp_dec (grp);	789	res2 = grp_dec (grp);
726		790
727	if (!res && res2)	791	if (!res)
728	res = res2;	792	res = res2;
729	}	793	}
730		794
731	eio_destroy (req);	795	eio_destroy (req);
732		796
733	return res;	797	return res;
734	}	798	}
735		799
		800	void
736	void eio_grp_cancel (eio_req *grp)	801	eio_grp_cancel (eio_req *grp)
737	{	802	{
738	for (grp = grp->grp_first; grp; grp = grp->grp_next)	803	for (grp = grp->grp_first; grp; grp = grp->grp_next)
739	eio_cancel (grp);	804	eio_cancel (grp);
740	}	805	}
741		806
		807	void
742	void eio_cancel (eio_req *req)	808	eio_cancel (eio_req *req)
743	{	809	{
744	etp_cancel (req);	810	etp_cancel (req);
745	}	811	}
746		812
		813	void
747	void eio_submit (eio_req *req)	814	eio_submit (eio_req *req)
748	{	815	{
749	etp_submit (req);	816	etp_submit (req);
750	}	817	}
751		818
752	unsigned int eio_nreqs (void)	819	unsigned int
		820	eio_nreqs (void)
753	{	821	{
754	return etp_nreqs ();	822	return etp_nreqs ();
755	}	823	}
756		824
757	unsigned int eio_nready (void)	825	unsigned int
		826	eio_nready (void)
758	{	827	{
759	return etp_nready ();	828	return etp_nready ();
760	}	829	}
761		830
762	unsigned int eio_npending (void)	831	unsigned int
		832	eio_npending (void)
763	{	833	{
764	return etp_npending ();	834	return etp_npending ();
765	}	835	}
766		836
767	unsigned int eio_nthreads (void)	837	unsigned int ecb_cold
		838	eio_nthreads (void)
768	{	839	{
769	return etp_nthreads ();	840	return etp_nthreads ();
770	}	841	}
771		842
		843	void ecb_cold
772	void eio_set_max_poll_time (double nseconds)	844	eio_set_max_poll_time (double nseconds)
773	{	845	{
774	etp_set_max_poll_time (nseconds);	846	etp_set_max_poll_time (nseconds);
775	}	847	}
776		848
		849	void ecb_cold
777	void eio_set_max_poll_reqs (unsigned int maxreqs)	850	eio_set_max_poll_reqs (unsigned int maxreqs)
778	{	851	{
779	etp_set_max_poll_reqs (maxreqs);	852	etp_set_max_poll_reqs (maxreqs);
780	}	853	}
781		854
		855	void ecb_cold
782	void eio_set_max_idle (unsigned int nthreads)	856	eio_set_max_idle (unsigned int nthreads)
783	{	857	{
784	etp_set_max_idle (nthreads);	858	etp_set_max_idle (nthreads);
785	}	859	}
786		860
		861	void ecb_cold
787	void eio_set_idle_timeout (unsigned int seconds)	862	eio_set_idle_timeout (unsigned int seconds)
788	{	863	{
789	etp_set_idle_timeout (seconds);	864	etp_set_idle_timeout (seconds);
790	}	865	}
791		866
		867	void ecb_cold
792	void eio_set_min_parallel (unsigned int nthreads)	868	eio_set_min_parallel (unsigned int nthreads)
793	{	869	{
794	etp_set_min_parallel (nthreads);	870	etp_set_min_parallel (nthreads);
795	}	871	}
796		872
		873	void ecb_cold
797	void eio_set_max_parallel (unsigned int nthreads)	874	eio_set_max_parallel (unsigned int nthreads)
798	{	875	{
799	etp_set_max_parallel (nthreads);	876	etp_set_max_parallel (nthreads);
800	}	877	}
801		878
802	int eio_poll (void)	879	int eio_poll (void)
…		…
811	# undef pread	888	# undef pread
812	# undef pwrite	889	# undef pwrite
813	# define pread eio__pread	890	# define pread eio__pread
814	# define pwrite eio__pwrite	891	# define pwrite eio__pwrite
815		892
816	static ssize_t	893	static eio_ssize_t
817	eio__pread (int fd, void *buf, size_t count, off_t offset)	894	eio__pread (int fd, void *buf, size_t count, off_t offset)
818	{	895	{
819	ssize_t res;	896	eio_ssize_t res;
820	off_t ooffset;	897	off_t ooffset;
821		898
822	X_LOCK (preadwritelock);	899	X_LOCK (preadwritelock);
823	ooffset = lseek (fd, 0, SEEK_CUR);	900	ooffset = lseek (fd, 0, SEEK_CUR);
824	lseek (fd, offset, SEEK_SET);	901	lseek (fd, offset, SEEK_SET);
…		…
827	X_UNLOCK (preadwritelock);	904	X_UNLOCK (preadwritelock);
828		905
829	return res;	906	return res;
830	}	907	}
831		908
832	static ssize_t	909	static eio_ssize_t
833	eio__pwrite (int fd, void *buf, size_t count, off_t offset)	910	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
834	{	911	{
835	ssize_t res;	912	eio_ssize_t res;
836	off_t ooffset;	913	off_t ooffset;
837		914
838	X_LOCK (preadwritelock);	915	X_LOCK (preadwritelock);
839	ooffset = lseek (fd, 0, SEEK_CUR);	916	ooffset = lseek (fd, 0, SEEK_CUR);
840	lseek (fd, offset, SEEK_SET);	917	lseek (fd, offset, SEEK_SET);
…		…
872	#ifndef HAVE_FUTIMES	949	#ifndef HAVE_FUTIMES
873		950
874	# undef futimes	951	# undef futimes
875	# define futimes(fd,times) eio__futimes (fd, times)	952	# define futimes(fd,times) eio__futimes (fd, times)
876		953
		954	static int
877	static int eio__futimes (int fd, const struct timeval tv[2])	955	eio__futimes (int fd, const struct timeval tv[2])
878	{	956	{
879	errno = ENOSYS;	957	errno = ENOSYS;
880	return -1;	958	return -1;
881	}	959	}
882		960
…		…
886	# undef fdatasync	964	# undef fdatasync
887	# define fdatasync(fd) fsync (fd)	965	# define fdatasync(fd) fsync (fd)
888	#endif	966	#endif
889		967
890	/* sync_file_range always needs emulation */	968	/* sync_file_range always needs emulation */
891	int	969	static int
892	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)	970	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
893	{	971	{
894	#if HAVE_SYNC_FILE_RANGE	972	#if HAVE_SYNC_FILE_RANGE
895	int res;	973	int res;
896		974
…		…
913	/* even though we could play tricks with the flags, it's better to always	991	/* even though we could play tricks with the flags, it's better to always
914	* call fdatasync, as that matches the expectation of its users best */	992	* call fdatasync, as that matches the expectation of its users best */
915	return fdatasync (fd);	993	return fdatasync (fd);
916	}	994	}
917		995
		996	static int
		997	eio__fallocate (int fd, int mode, off_t offset, size_t len)
		998	{
		999	#if HAVE_FALLOCATE
		1000	return fallocate (fd, mode, offset, len);
		1001	#else
		1002	errno = ENOSYS;
		1003	return -1;
		1004	#endif
		1005	}
		1006
918	#if !HAVE_READAHEAD	1007	#if !HAVE_READAHEAD
919	# undef readahead	1008	# undef readahead
920	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)	1009	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
921		1010
922	static ssize_t	1011	static eio_ssize_t
923	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)	1012	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
924	{	1013	{
925	size_t todo = count;	1014	size_t todo = count;
926	dBUF;	1015	dBUF;
927		1016
…		…
939	}	1028	}
940		1029
941	#endif	1030	#endif
942		1031
943	/* sendfile always needs emulation */	1032	/* sendfile always needs emulation */
944	static ssize_t	1033	static eio_ssize_t
945	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)	1034	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
946	{	1035	{
		1036	eio_ssize_t written = 0;
947	ssize_t res;	1037	eio_ssize_t res;
948		1038
949	if (!count)	1039	if (!count)
950	return 0;	1040	return 0;
951		1041
		1042	for (;;)
		1043	{
		1044	#ifdef __APPLE__
		1045	# undef HAVE_SENDFILE /* broken, as everything on os x */
		1046	#endif
952	#if HAVE_SENDFILE	1047	#if HAVE_SENDFILE
953	# if __linux	1048	# if __linux
		1049	off_t soffset = offset;
954	res = sendfile (ofd, ifd, &offset, count);	1050	res = sendfile (ofd, ifd, &soffset, count);
955		1051
956	# elif __FreeBSD__	1052	# elif __FreeBSD__
957	/*	1053	/*
958	* Of course, the freebsd sendfile is a dire hack with no thoughts	1054	* Of course, the freebsd sendfile is a dire hack with no thoughts
959	* wasted on making it similar to other I/O functions.	1055	* wasted on making it similar to other I/O functions.
960	*/	1056	*/
961	{
962	off_t sbytes;	1057	off_t sbytes;
963	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	1058	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
964		1059
965	#if 0 /* according to the manpage, this is correct, but broken behaviour */	1060	#if 0 /* according to the manpage, this is correct, but broken behaviour */
966	/* freebsd' sendfile will return 0 on success */	1061	/* freebsd' sendfile will return 0 on success */
967	/* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */	1062	/* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
968	/* not on e.g. EIO or EPIPE - sounds broken */	1063	/* not on e.g. EIO or EPIPE - sounds broken */
969	if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)	1064	if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
970	res = sbytes;	1065	res = sbytes;
971	#endif	1066	#endif
972		1067
973	/* according to source inspection, this is correct, and useful behaviour */	1068	/* according to source inspection, this is correct, and useful behaviour */
974	if (sbytes)	1069	if (sbytes)
975	res = sbytes;	1070	res = sbytes;
976	}
977		1071
978	# elif defined (__APPLE__)	1072	# elif defined (__APPLE__)
979
980	{
981	off_t sbytes = count;	1073	off_t sbytes = count;
982	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);	1074	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
983		1075
984	/* according to the manpage, sbytes is always valid */	1076	/* according to the manpage, sbytes is always valid */
985	if (sbytes)	1077	if (sbytes)
986	res = sbytes;	1078	res = sbytes;
987	}
988		1079
989	# elif __hpux	1080	# elif __hpux
990	res = sendfile (ofd, ifd, offset, count, 0, 0);	1081	res = sendfile (ofd, ifd, offset, count, 0, 0);
991		1082
992	# elif __solaris	1083	# elif __solaris
993	{
994	struct sendfilevec vec;	1084	struct sendfilevec vec;
995	size_t sbytes;	1085	size_t sbytes;
996		1086
997	vec.sfv_fd = ifd;	1087	vec.sfv_fd = ifd;
998	vec.sfv_flag = 0;	1088	vec.sfv_flag = 0;
999	vec.sfv_off = offset;	1089	vec.sfv_off = offset;
1000	vec.sfv_len = count;	1090	vec.sfv_len = count;
1001		1091
1002	res = sendfilev (ofd, &vec, 1, &sbytes);	1092	res = sendfilev (ofd, &vec, 1, &sbytes);
1003		1093
1004	if (res < 0 && sbytes)	1094	if (res < 0 && sbytes)
1005	res = sbytes;	1095	res = sbytes;
1006	}
1007		1096
1008	# endif	1097	# endif
1009		1098
1010	#elif defined (_WIN32)	1099	#elif defined (_WIN32) && 0
1011
1012	/* does not work, just for documentation of what would need to be done */	1100	/* does not work, just for documentation of what would need to be done */
1013	{	1101	/* actually, cannot be done like this, as TransmitFile changes the file offset, */
		1102	/* libeio guarantees that the file offset does not change, and windows */
		1103	/* has no way to get an independent handle to the same file description */
1014	HANDLE h = TO_SOCKET (ifd);	1104	HANDLE h = TO_SOCKET (ifd);
1015	SetFilePointer (h, offset, 0, FILE_BEGIN);	1105	SetFilePointer (h, offset, 0, FILE_BEGIN);
1016	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);	1106	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
1017	}
1018		1107
1019	#else	1108	#else
1020	res = -1;	1109	res = -1;
1021	errno = ENOSYS;	1110	errno = ENOSYS;
1022	#endif	1111	#endif
1023		1112
		1113	/* we assume sendfile can copy at least 128mb in one go */
		1114	if (res <= 128 * 1024 * 1024)
		1115	{
		1116	if (res > 0)
		1117	written += res;
		1118
		1119	if (written)
		1120	return written;
		1121
		1122	break;
		1123	}
		1124	else
		1125	{
		1126	/* if we requested more, then probably the kernel was lazy */
		1127	written += res;
		1128	offset += res;
		1129	count -= res;
		1130
		1131	if (!count)
		1132	return written;
		1133	}
		1134	}
		1135
1024	if (res < 0	1136	if (res < 0
1025	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	1137	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
1026	/* BSDs */	1138	/* BSDs */
1027	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */	1139	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
1028	|| errno == ENOTSUP	1140	|| errno == ENOTSUP
1029	#endif	1141	#endif
		1142	#ifdef EOPNOTSUPP /* windows */
1030	|| errno == EOPNOTSUPP /* BSDs */	1143	|| errno == EOPNOTSUPP /* BSDs */
		1144	#endif
1031	#if __solaris	1145	#if __solaris
1032	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	1146	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
1033	#endif	1147	#endif
1034	)	1148	)
1035	)	1149	)
…		…
1039		1153
1040	res = 0;	1154	res = 0;
1041		1155
1042	while (count)	1156	while (count)
1043	{	1157	{
1044	ssize_t cnt;	1158	eio_ssize_t cnt;
1045		1159
1046	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);	1160	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);
1047		1161
1048	if (cnt <= 0)	1162	if (cnt <= 0)
1049	{	1163	{
…		…
1066	}	1180	}
1067		1181
1068	return res;	1182	return res;
1069	}	1183	}
1070		1184
		1185	#ifdef PAGESIZE
		1186	# define eio_pagesize() PAGESIZE
		1187	#else
		1188	static intptr_t
		1189	eio_pagesize (void)
		1190	{
		1191	static intptr_t page;
		1192
		1193	if (!page)
		1194	page = sysconf (_SC_PAGESIZE);
		1195
		1196	return page;
		1197	}
		1198	#endif
		1199
		1200	static void
		1201	eio_page_align (void **addr, size_t *length)
		1202	{
		1203	intptr_t mask = eio_pagesize () - 1;
		1204
		1205	/* round down addr */
		1206	intptr_t adj = mask & (intptr_t)*addr;
		1207
		1208	*addr = (void *)((intptr_t)*addr - adj);
		1209	*length += adj;
		1210
		1211	/* round up length */
		1212	*length = (*length + mask) & ~mask;
		1213	}
		1214
		1215	#if !_POSIX_MEMLOCK
		1216	# define eio__mlockall(a) EIO_ENOSYS ()
		1217	#else
		1218
		1219	static int
		1220	eio__mlockall (int flags)
		1221	{
		1222	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1223	extern int mallopt (int, int);
		1224	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1225	#endif
		1226
		1227	if (EIO_MCL_CURRENT != MCL_CURRENT
		1228	|| EIO_MCL_FUTURE != MCL_FUTURE)
		1229	{
		1230	flags = 0
		1231	| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
		1232	| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
		1233	}
		1234
		1235	return mlockall (flags);
		1236	}
		1237	#endif
		1238
		1239	#if !_POSIX_MEMLOCK_RANGE
		1240	# define eio__mlock(a,b) EIO_ENOSYS ()
		1241	#else
		1242
		1243	static int
		1244	eio__mlock (void *addr, size_t length)
		1245	{
		1246	eio_page_align (&addr, &length);
		1247
		1248	return mlock (addr, length);
		1249	}
		1250
		1251	#endif
		1252
		1253	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1254	# define eio__msync(a,b,c) EIO_ENOSYS ()
		1255	#else
		1256
		1257	static int
		1258	eio__msync (void *mem, size_t len, int flags)
		1259	{
		1260	eio_page_align (&mem, &len);
		1261
		1262	if (EIO_MS_ASYNC != MS_SYNC
		1263	|| EIO_MS_INVALIDATE != MS_INVALIDATE
		1264	|| EIO_MS_SYNC != MS_SYNC)
		1265	{
		1266	flags = 0
		1267	| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
		1268	| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
		1269	| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
		1270	}
		1271
		1272	return msync (mem, len, flags);
		1273	}
		1274
		1275	#endif
		1276
		1277	static int
		1278	eio__mtouch (eio_req *req)
		1279	{
		1280	void *mem = req->ptr2;
		1281	size_t len = req->size;
		1282	int flags = req->int1;
		1283
		1284	eio_page_align (&mem, &len);
		1285
		1286	{
		1287	intptr_t addr = (intptr_t)mem;
		1288	intptr_t end = addr + len;
		1289	intptr_t page = eio_pagesize ();
		1290
		1291	if (addr < end)
		1292	if (flags & EIO_MT_MODIFY) /* modify */
		1293	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1294	else
		1295	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1296	}
		1297
		1298	return 0;
		1299	}
		1300
		1301	/*****************************************************************************/
		1302	/* requests implemented outside eio_execute, because they are so large */
		1303
		1304	static void
		1305	eio__realpath (eio_req *req, etp_worker *self)
		1306	{
		1307	char *rel = req->ptr1;
		1308	char *res;
		1309	char *tmp1, *tmp2;
		1310	#if SYMLOOP_MAX > 32
		1311	int symlinks = SYMLOOP_MAX;
		1312	#else
		1313	int symlinks = 32;
		1314	#endif
		1315
		1316	req->result = -1;
		1317
		1318	errno = EINVAL;
		1319	if (!rel)
		1320	return;
		1321
		1322	errno = ENOENT;
		1323	if (!*rel)
		1324	return;
		1325
		1326	if (!req->ptr2)
		1327	{
		1328	X_LOCK (wrklock);
		1329	req->flags |= EIO_FLAG_PTR2_FREE;
		1330	X_UNLOCK (wrklock);
		1331	req->ptr2 = malloc (PATH_MAX * 3);
		1332
		1333	errno = ENOMEM;
		1334	if (!req->ptr2)
		1335	return;
		1336	}
		1337
		1338	res = req->ptr2;
		1339	tmp1 = res + PATH_MAX;
		1340	tmp2 = tmp1 + PATH_MAX;
		1341
		1342	#if 0 /* disabled, the musl way to do things is just too racy */
		1343	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
		1344	/* on linux we may be able to ask the kernel */
		1345	{
		1346	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
		1347
		1348	if (fd >= 0)
		1349	{
		1350	sprintf (tmp1, "/proc/self/fd/%d", fd);
		1351	req->result = readlink (tmp1, res, PATH_MAX);
		1352	close (fd);
		1353
		1354	/* here we should probably stat the open file and the disk file, to make sure they still match */
		1355
		1356	if (req->result > 0)
		1357	goto done;
		1358	}
		1359	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
		1360	return;
		1361	}
		1362	#endif
		1363	#endif
		1364
		1365	if (*rel != '/')
		1366	{
		1367	if (!getcwd (res, PATH_MAX))
		1368	return;
		1369
		1370	if (res [1]) /* only use if not / */
		1371	res += strlen (res);
		1372	}
		1373
		1374	while (*rel)
		1375	{
		1376	eio_ssize_t len, linklen;
		1377	char *beg = rel;
		1378
		1379	while (*rel && *rel != '/')
		1380	++rel;
		1381
		1382	len = rel - beg;
		1383
		1384	if (!len) /* skip slashes */
		1385	{
		1386	++rel;
		1387	continue;
		1388	}
		1389
		1390	if (beg [0] == '.')
		1391	{
		1392	if (len == 1)
		1393	continue; /* . - nop */
		1394
		1395	if (beg [1] == '.' && len == 2)
		1396	{
		1397	/* .. - back up one component, if possible */
		1398
		1399	while (res != req->ptr2)
		1400	if (*--res == '/')
		1401	break;
		1402
		1403	continue;
		1404	}
		1405	}
		1406
		1407	errno = ENAMETOOLONG;
		1408	if (res + 1 + len + 1 >= tmp1)
		1409	return;
		1410
		1411	/* copy one component */
		1412	*res = '/';
		1413	memcpy (res + 1, beg, len);
		1414
		1415	/* zero-terminate, for readlink */
		1416	res [len + 1] = 0;
		1417
		1418	/* now check if it's a symlink */
		1419	linklen = readlink (req->ptr2, tmp1, PATH_MAX);
		1420
		1421	if (linklen < 0)
		1422	{
		1423	if (errno != EINVAL)
		1424	return;
		1425
		1426	/* it's a normal directory. hopefully */
		1427	res += len + 1;
		1428	}
		1429	else
		1430	{
		1431	/* yay, it was a symlink - build new path in tmp2 */
		1432	int rellen = strlen (rel);
		1433
		1434	errno = ENAMETOOLONG;
		1435	if (linklen + 1 + rellen >= PATH_MAX)
		1436	return;
		1437
		1438	errno = ELOOP;
		1439	if (!--symlinks)
		1440	return;
		1441
		1442	if (*tmp1 == '/')
		1443	res = req->ptr2; /* symlink resolves to an absolute path */
		1444
		1445	/* we need to be careful, as rel might point into tmp2 already */
		1446	memmove (tmp2 + linklen + 1, rel, rellen + 1);
		1447	tmp2 [linklen] = '/';
		1448	memcpy (tmp2, tmp1, linklen);
		1449
		1450	rel = tmp2;
		1451	}
		1452	}
		1453
		1454	/* special case for the lone root path */
		1455	if (res == req->ptr2)
		1456	*res++ = '/';
		1457
		1458	req->result = res - (char *)req->ptr2;
		1459
		1460	done:
		1461	req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */
		1462	}
		1463
1071	static signed char	1464	static signed char
1072	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)	1465	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
1073	{	1466	{
1074	return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */	1467	return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
1075	: a->inode < b->inode ? -1	1468	: a->inode < b->inode ? -1
…		…
1081		1474
1082	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */	1475	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
1083	#define EIO_SORT_FAST 60 /* when to only use insertion sort */	1476	#define EIO_SORT_FAST 60 /* when to only use insertion sort */
1084		1477
1085	static void	1478	static void
1086	eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)	1479	eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
1087	{	1480	{
1088	unsigned char bits [9 + sizeof (ino_t) * 8];	1481	unsigned char bits [9 + sizeof (eio_ino_t) * 8];
1089	unsigned char *bit = bits;	1482	unsigned char *bit = bits;
1090		1483
1091	assert (CHAR_BIT == 8);	1484	assert (CHAR_BIT == 8);
1092	assert (sizeof (eio_dirent) * 8 < 256);	1485	assert (sizeof (eio_dirent) * 8 < 256);
1093	assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */	1486	assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
…		…
1095		1488
1096	if (size <= EIO_SORT_FAST)	1489	if (size <= EIO_SORT_FAST)
1097	return;	1490	return;
1098		1491
1099	/* first prepare an array of bits to test in our radix sort */	1492	/* first prepare an array of bits to test in our radix sort */
1100	/* try to take endianness into account, as well as differences in ino_t sizes */	1493	/* try to take endianness into account, as well as differences in eio_ino_t sizes */
1101	/* inode_bits must contain all inodes ORed together */	1494	/* inode_bits must contain all inodes ORed together */
1102	/* which is used to skip bits that are 0 everywhere, which is very common */	1495	/* which is used to skip bits that are 0 everywhere, which is very common */
1103	{	1496	{
1104	ino_t endianness;	1497	eio_ino_t endianness;
1105	int i, j;	1498	int i, j;
1106		1499
1107	/* we store the byte offset of byte n into byte n of "endianness" */	1500	/* we store the byte offset of byte n into byte n of "endianness" */
1108	for (i = 0; i < sizeof (ino_t); ++i)	1501	for (i = 0; i < sizeof (eio_ino_t); ++i)
1109	((unsigned char *)&endianness)[i] = i;	1502	((unsigned char *)&endianness)[i] = i;
1110		1503
1111	*bit++ = 0;	1504	*bit++ = 0;
1112		1505
1113	for (i = 0; i < sizeof (ino_t); ++i)	1506	for (i = 0; i < sizeof (eio_ino_t); ++i)
1114	{	1507	{
1115	/* shifting off the byte offsets out of "endianness" */	1508	/* shifting off the byte offsets out of "endianness" */
1116	int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;	1509	int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
1117	endianness >>= 8;	1510	endianness >>= 8;
1118		1511
1119	for (j = 0; j < 8; ++j)	1512	for (j = 0; j < 8; ++j)
1120	if (inode_bits & (((ino_t)1) << (i * 8 + j)))	1513	if (inode_bits & (((eio_ino_t)1) << (i * 8 + j)))
1121	*bit++ = offs + j;	1514	*bit++ = offs + j;
1122	}	1515	}
1123		1516
1124	for (j = 0; j < 8; ++j)	1517	for (j = 0; j < 8; ++j)
1125	if (score_bits & (1 << j))	1518	if (score_bits & (1 << j))
1126	*bit++ = offsetof (eio_dirent, score) * 8 + j;	1519	*bit++ = offsetof (eio_dirent, score) * 8 + j;
1127	}	1520	}
1128		1521
1129	/* now actually do the sorting (a variant of MSD radix sort) */	1522	/* now actually do the sorting (a variant of MSD radix sort) */
1130	{	1523	{
1131	eio_dirent *base_stk [9 + sizeof (ino_t) * 8], *base;	1524	eio_dirent *base_stk [9 + sizeof (eio_ino_t) * 8], *base;
1132	eio_dirent *end_stk [9 + sizeof (ino_t) * 8], *end;	1525	eio_dirent *end_stk [9 + sizeof (eio_ino_t) * 8], *end;
1133	unsigned char *bit_stk [9 + sizeof (ino_t) * 8];	1526	unsigned char *bit_stk [9 + sizeof (eio_ino_t) * 8];
1134	int stk_idx = 0;	1527	int stk_idx = 0;
1135		1528
1136	base_stk [stk_idx] = dents;	1529	base_stk [stk_idx] = dents;
1137	end_stk [stk_idx] = dents + size;	1530	end_stk [stk_idx] = dents + size;
1138	bit_stk [stk_idx] = bit - 1;	1531	bit_stk [stk_idx] = bit - 1;
…		…
1217	}	1610	}
1218	}	1611	}
1219	}	1612	}
1220		1613
1221	static void	1614	static void
1222	eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)	1615	eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
1223	{	1616	{
1224	if (size <= 1)	1617	if (size <= 1)
1225	return; /* our insertion sort relies on size > 0 */	1618	return; /* our insertion sort relies on size > 0 */
1226		1619
1227	/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */	1620	/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
…		…
1235		1628
1236	/* read a full directory */	1629	/* read a full directory */
1237	static void	1630	static void
1238	eio__scandir (eio_req *req, etp_worker *self)	1631	eio__scandir (eio_req *req, etp_worker *self)
1239	{	1632	{
1240	DIR *dirp;
1241	EIO_STRUCT_DIRENT *entp;
1242	char *name, *names;	1633	char *name, *names;
1243	int namesalloc = 4096;	1634	int namesalloc = 4096 - sizeof (void *) * 4;
1244	int namesoffs = 0;	1635	int namesoffs = 0;
1245	int flags = req->int1;	1636	int flags = req->int1;
1246	eio_dirent *dents = 0;	1637	eio_dirent *dents = 0;
1247	int dentalloc = 128;	1638	int dentalloc = 128;
1248	int dentoffs = 0;	1639	int dentoffs = 0;
1249	ino_t inode_bits = 0;	1640	eio_ino_t inode_bits = 0;
		1641	#ifdef _WIN32
		1642	HANDLE dirp;
		1643	WIN32_FIND_DATA entp;
		1644	#else
		1645	DIR *dirp;
		1646	EIO_STRUCT_DIRENT *entp;
		1647	#endif
1250		1648
1251	req->result = -1;	1649	req->result = -1;
1252		1650
1253	if (!(flags & EIO_READDIR_DENTS))	1651	if (!(flags & EIO_READDIR_DENTS))
1254	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);	1652	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
1255		1653
1256	X_LOCK (wrklock);	1654	#ifdef _WIN32
1257	/* the corresponding closedir is in ETP_WORKER_CLEAR */	1655	{
		1656	int len = strlen ((const char *)req->ptr1);
		1657	char *path = malloc (MAX_PATH);
		1658	const char *fmt;
		1659
		1660	if (!len)
		1661	fmt = "./*";
		1662	else if (((const char *)req->ptr1)[len - 1] == '/' || ((const char *)req->ptr1)[len - 1] == '\\')
		1663	fmt = "%s*";
		1664	else
		1665	fmt = "%s/*";
		1666
		1667	_snprintf (path, MAX_PATH, fmt, (const char *)req->ptr1);
		1668	dirp = FindFirstFile (path, &entp);
		1669	free (path);
		1670
		1671	if (dirp == INVALID_HANDLE_VALUE)
		1672	{
		1673	dirp = 0;
		1674
		1675	switch (GetLastError ())
		1676	{
		1677	case ERROR_FILE_NOT_FOUND:
		1678	req->result = 0;
		1679	break;
		1680
		1681	case ERROR_INVALID_NAME:
		1682	case ERROR_PATH_NOT_FOUND:
		1683	case ERROR_NO_MORE_FILES:
		1684	errno = ENOENT;
		1685	break;
		1686
		1687	case ERROR_NOT_ENOUGH_MEMORY:
		1688	errno = ENOMEM;
		1689	break;
		1690
		1691	default:
		1692	errno = EINVAL;
		1693	break;
		1694	}
		1695	}
		1696	}
		1697	#else
1258	self->dirp = dirp = opendir (req->ptr1);	1698	dirp = opendir (req->ptr1);
		1699	#endif
		1700
		1701	if (req->flags & EIO_FLAG_PTR1_FREE)
		1702	free (req->ptr1);
1259		1703
1260	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;	1704	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
1261	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;	1705	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
1262	req->ptr2 = names = malloc (namesalloc);	1706	req->ptr2 = names = malloc (namesalloc);
1263	X_UNLOCK (wrklock);
1264		1707
1265	if (dirp && names && (!flags || dents))	1708	if (dirp && names && (!flags || dents))
1266	for (;;)	1709	for (;;)
1267	{	1710	{
		1711	int done;
		1712
		1713	#ifdef _WIN32
		1714	done = !dirp;
		1715	#else
1268	errno = 0;	1716	errno = 0;
1269	entp = readdir (dirp);	1717	entp = readdir (dirp);
		1718	done = !entp;
		1719	#endif
1270		1720
1271	if (!entp)	1721	if (done)
1272	{	1722	{
		1723	#ifndef _WIN32
		1724	int old_errno = errno;
		1725	closedir (dirp);
		1726	errno = old_errno;
		1727
1273	if (errno)	1728	if (errno)
1274	break;	1729	break;
		1730	#endif
1275		1731
1276	/* sort etc. */	1732	/* sort etc. */
1277	req->int1 = flags;	1733	req->int1 = flags;
1278	req->result = dentoffs;	1734	req->result = dentoffs;
1279		1735
…		…
1308		1764
1309	break;	1765	break;
1310	}	1766	}
1311		1767
1312	/* now add the entry to our list(s) */	1768	/* now add the entry to our list(s) */
1313	name = entp->d_name;	1769	name = D_NAME (entp);
1314		1770
1315	/* skip . and .. entries */	1771	/* skip . and .. entries */
1316	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1772	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1317	{	1773	{
1318	int len = D_NAMLEN (entp) + 1;	1774	int len = D_NAMLEN (entp) + 1;
1319		1775
1320	while (expect_false (namesoffs + len > namesalloc))	1776	while (ecb_expect_false (namesoffs + len > namesalloc))
1321	{	1777	{
1322	namesalloc *= 2;	1778	namesalloc *= 2;
1323	X_LOCK (wrklock);
1324	req->ptr2 = names = realloc (names, namesalloc);	1779	req->ptr2 = names = realloc (names, namesalloc);
1325	X_UNLOCK (wrklock);
1326		1780
1327	if (!names)	1781	if (!names)
1328	break;	1782	break;
1329	}	1783	}
1330		1784
…		…
1332		1786
1333	if (dents)	1787	if (dents)
1334	{	1788	{
1335	struct eio_dirent *ent;	1789	struct eio_dirent *ent;
1336		1790
1337	if (expect_false (dentoffs == dentalloc))	1791	if (ecb_expect_false (dentoffs == dentalloc))
1338	{	1792	{
1339	dentalloc *= 2;	1793	dentalloc *= 2;
1340	X_LOCK (wrklock);
1341	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));	1794	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
1342	X_UNLOCK (wrklock);
1343		1795
1344	if (!dents)	1796	if (!dents)
1345	break;	1797	break;
1346	}	1798	}
1347		1799
…		…
1427	if (EIO_CANCELLED (req))	1879	if (EIO_CANCELLED (req))
1428	{	1880	{
1429	errno = ECANCELED;	1881	errno = ECANCELED;
1430	break;	1882	break;
1431	}	1883	}
		1884
		1885	#ifdef _WIN32
		1886	if (!FindNextFile (dirp, &entp))
		1887	{
		1888	FindClose (dirp);
		1889	dirp = 0;
		1890	}
		1891	#endif
1432	}	1892	}
1433	}
1434
1435	#ifdef PAGESIZE
1436	# define eio_pagesize() PAGESIZE
1437	#else
1438	static intptr_t
1439	eio_pagesize (void)
1440	{
1441	static intptr_t page;
1442
1443	if (!page)
1444	page = sysconf (_SC_PAGESIZE);
1445
1446	return page;
1447	}
1448	#endif
1449
1450	static void
1451	eio_page_align (void **addr, size_t *length)
1452	{
1453	intptr_t mask = eio_pagesize () - 1;
1454
1455	/* round down addr */
1456	intptr_t adj = mask & (intptr_t)*addr;
1457
1458	*addr = (void *)((intptr_t)*addr - adj);
1459	*length += adj;
1460
1461	/* round up length */
1462	*length = (*length + mask) & ~mask;
1463	}
1464
1465	#if !_POSIX_MEMLOCK
1466	# define eio__mlockall(a) ((errno = ENOSYS), -1)
1467	#else
1468
1469	static int
1470	eio__mlockall (int flags)
1471	{
1472	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
1473	extern int mallopt (int, int);
1474	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
1475	#endif
1476
1477	if (EIO_MCL_CURRENT != MCL_CURRENT
1478	|| EIO_MCL_FUTURE != MCL_FUTURE)
1479	{
1480	flags = 0
1481	| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
1482	| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
1483	}
1484
1485	return mlockall (flags);
1486	}
1487	#endif
1488
1489	#if !_POSIX_MEMLOCK_RANGE
1490	# define eio__mlock(a,b) ((errno = ENOSYS), -1)
1491	#else
1492
1493	static int
1494	eio__mlock (void *addr, size_t length)
1495	{
1496	eio_page_align (&addr, &length);
1497
1498	return mlock (addr, length);
1499	}
1500
1501	#endif
1502
1503	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
1504	# define eio__msync(a,b,c) ((errno = ENOSYS), -1)
1505	#else
1506
1507	int
1508	eio__msync (void *mem, size_t len, int flags)
1509	{
1510	eio_page_align (&mem, &len);
1511
1512	if (EIO_MS_ASYNC != MS_SYNC
1513	|| EIO_MS_INVALIDATE != MS_INVALIDATE
1514	|| EIO_MS_SYNC != MS_SYNC)
1515	{
1516	flags = 0
1517	| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
1518	| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
1519	| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
1520	}
1521
1522	return msync (mem, len, flags);
1523	}
1524
1525	#endif
1526
1527	int
1528	eio__mtouch (void *mem, size_t len, int flags)
1529	{
1530	eio_page_align (&mem, &len);
1531
1532	{
1533	intptr_t addr = (intptr_t)mem;
1534	intptr_t end = addr + len;
1535	intptr_t page = eio_pagesize ();
1536
1537	if (addr < end)
1538	if (flags & EIO_MT_MODIFY) /* modify */
1539	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len);
1540	else
1541	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len);
1542	}
1543
1544	return 0;
1545	}	1893	}
1546		1894
1547	/*****************************************************************************/	1895	/*****************************************************************************/
1548		1896
1549	#define ALLOC(len) \	1897	#define ALLOC(len) \
…		…
1565	{	1913	{
1566	ETP_REQ *req;	1914	ETP_REQ *req;
1567	struct timespec ts;	1915	struct timespec ts;
1568	etp_worker *self = (etp_worker *)thr_arg;	1916	etp_worker *self = (etp_worker *)thr_arg;
1569		1917
1570	/* try to distribute timeouts somewhat randomly */	1918	/* try to distribute timeouts somewhat evenly */
1571	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1919	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
1572		1920
1573	for (;;)	1921	for (;;)
1574	{	1922	{
		1923	ts.tv_sec = 0;
		1924
1575	X_LOCK (reqlock);	1925	X_LOCK (reqlock);
1576		1926
1577	for (;;)	1927	for (;;)
1578	{	1928	{
1579	self->req = req = reqq_shift (&req_queue);	1929	self->req = req = reqq_shift (&req_queue);
1580		1930
1581	if (req)	1931	if (req)
1582	break;	1932	break;
1583		1933
		1934	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
		1935	{
		1936	X_UNLOCK (reqlock);
		1937	X_LOCK (wrklock);
		1938	--started;
		1939	X_UNLOCK (wrklock);
		1940	goto quit;
		1941	}
		1942
1584	++idle;	1943	++idle;
1585		1944
1586	ts.tv_sec = time (0) + idle_timeout;	1945	if (idle <= max_idle)
1587	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1946	/* we are allowed to idle, so do so without any timeout */
		1947	X_COND_WAIT (reqwait, reqlock);
		1948	else
1588	{	1949	{
1589	if (idle > max_idle)	1950	/* initialise timeout once */
1590	{	1951	if (!ts.tv_sec)
1591	--idle;	1952	ts.tv_sec = time (0) + idle_timeout;
1592	X_UNLOCK (reqlock);
1593	X_LOCK (wrklock);
1594	--started;
1595	X_UNLOCK (wrklock);
1596	goto quit;
1597	}
1598		1953
1599	/* we are allowed to idle, so do so without any timeout */
1600	X_COND_WAIT (reqwait, reqlock);	1954	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
		1955	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
1601	}	1956	}
1602		1957
1603	--idle;	1958	--idle;
1604	}	1959	}
1605		1960
…		…
1608	X_UNLOCK (reqlock);	1963	X_UNLOCK (reqlock);
1609		1964
1610	if (req->type < 0)	1965	if (req->type < 0)
1611	goto quit;	1966	goto quit;
1612		1967
1613	if (!EIO_CANCELLED (req))
1614	ETP_EXECUTE (self, req);	1968	ETP_EXECUTE (self, req);
1615		1969
1616	X_LOCK (reslock);	1970	X_LOCK (reslock);
1617		1971
1618	++npending;	1972	++npending;
1619		1973
…		…
1634	return 0;	1988	return 0;
1635	}	1989	}
1636		1990
1637	/*****************************************************************************/	1991	/*****************************************************************************/
1638		1992
		1993	int ecb_cold
1639	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1994	eio_init (void (*want_poll)(void), void (*done_poll)(void))
1640	{	1995	{
1641	return etp_init (want_poll, done_poll);	1996	return etp_init (want_poll, done_poll);
1642	}	1997	}
1643		1998
		1999	ecb_inline void
1644	static void eio_api_destroy (eio_req *req)	2000	eio_api_destroy (eio_req *req)
1645	{	2001	{
1646	free (req);	2002	free (req);
1647	}	2003	}
1648		2004
1649	#define REQ(rtype) \	2005	#define REQ(rtype) \
…		…
1668	{ \	2024	{ \
1669	eio_api_destroy (req); \	2025	eio_api_destroy (req); \
1670	return 0; \	2026	return 0; \
1671	}	2027	}
1672		2028
		2029	static void
1673	static void eio_execute (etp_worker *self, eio_req *req)	2030	eio_execute (etp_worker *self, eio_req *req)
1674	{	2031	{
		2032	if (ecb_expect_false (EIO_CANCELLED (req)))
		2033	{
		2034	req->result = -1;
		2035	req->errorno = ECANCELED;
		2036	return;
		2037	}
		2038
1675	switch (req->type)	2039	switch (req->type)
1676	{	2040	{
1677	case EIO_READ: ALLOC (req->size);	2041	case EIO_READ: ALLOC (req->size);
1678	req->result = req->offs >= 0	2042	req->result = req->offs >= 0
1679	? pread (req->int1, req->ptr2, req->size, req->offs)	2043	? pread (req->int1, req->ptr2, req->size, req->offs)
…		…
1713	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;	2077	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
1714	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;	2078	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
1715	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;	2079	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
1716	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;	2080	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
1717		2081
		2082	case EIO_REALPATH: eio__realpath (req, self); break;
		2083
1718	case EIO_READLINK: ALLOC (PATH_MAX);	2084	case EIO_READLINK: ALLOC (PATH_MAX);
1719	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;	2085	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
1720		2086
1721	case EIO_SYNC: req->result = 0; sync (); break;	2087	case EIO_SYNC: req->result = 0; sync (); break;
1722	case EIO_FSYNC: req->result = fsync (req->int1); break;	2088	case EIO_FSYNC: req->result = fsync (req->int1); break;
1723	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;	2089	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
1724	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;	2090	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
1725	case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break;	2091	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
1726	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;	2092	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
1727	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;	2093	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
1728	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;	2094	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		2095	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
1729		2096
1730	case EIO_READDIR: eio__scandir (req, self); break;	2097	case EIO_READDIR: eio__scandir (req, self); break;
1731		2098
1732	case EIO_BUSY:	2099	case EIO_BUSY:
1733	#ifdef _WIN32	2100	#ifdef _WIN32
…		…
1774	case EIO_NOP:	2141	case EIO_NOP:
1775	req->result = 0;	2142	req->result = 0;
1776	break;	2143	break;
1777		2144
1778	case EIO_CUSTOM:	2145	case EIO_CUSTOM:
1779	((void (*)(eio_req *))req->feed) (req);	2146	req->feed (req);
1780	break;	2147	break;
1781		2148
1782	default:	2149	default:
1783	errno = ENOSYS;	2150	errno = ENOSYS;
1784	req->result = -1;	2151	req->result = -1;
…		…
1833	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)	2200	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
1834	{	2201	{
1835	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;	2202	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
1836	}	2203	}
1837		2204
		2205	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
		2206	{
		2207	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
		2208	}
		2209
1838	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)	2210	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1839	{	2211	{
1840	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;	2212	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1841	}	2213	}
1842		2214
…		…
1883	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)	2255	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
1884	{	2256	{
1885	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;	2257	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1886	}	2258	}
1887		2259
1888	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)	2260	eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1889	{	2261	{
1890	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2262	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1891	}	2263	}
1892		2264
1893	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)	2265	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
…		…
1913	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)	2285	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
1914	{	2286	{
1915	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;	2287	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1916	}	2288	}
1917		2289
1918	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)	2290	eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1919	{	2291	{
1920	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2292	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1921	}	2293	}
1922		2294
1923	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)	2295	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
…		…
1937	}	2309	}
1938		2310
1939	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)	2311	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
1940	{	2312	{
1941	return eio__1path (EIO_READLINK, path, pri, cb, data);	2313	return eio__1path (EIO_READLINK, path, pri, cb, data);
		2314	}
		2315
		2316	eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
		2317	{
		2318	return eio__1path (EIO_REALPATH, path, pri, cb, data);
1942	}	2319	}
1943		2320
1944	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)	2321	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
1945	{	2322	{
1946	return eio__1path (EIO_STAT, path, pri, cb, data);	2323	return eio__1path (EIO_STAT, path, pri, cb, data);
…		…
2005	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)	2382	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2006	{	2383	{
2007	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);	2384	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
2008	}	2385	}
2009		2386
2010	eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data)	2387	eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
2011	{	2388	{
2012	REQ (EIO_CUSTOM); req->feed = (void (*)(eio_req *))execute; SEND;	2389	REQ (EIO_CUSTOM); req->feed = execute; SEND;
2013	}	2390	}
2014		2391
2015	#endif	2392	#endif
2016		2393
2017	eio_req *eio_grp (eio_cb cb, void *data)	2394	eio_req *eio_grp (eio_cb cb, void *data)
…		…
2026	#undef SEND	2403	#undef SEND
2027		2404
2028	/*****************************************************************************/	2405	/*****************************************************************************/
2029	/* grp functions */	2406	/* grp functions */
2030		2407
		2408	void
2031	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	2409	eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
2032	{	2410	{
2033	grp->int2 = limit;	2411	grp->int2 = limit;
2034	grp->feed = feed;	2412	grp->feed = feed;
2035		2413
2036	grp_try_feed (grp);	2414	grp_try_feed (grp);
2037	}	2415	}
2038		2416
		2417	void
2039	void eio_grp_limit (eio_req *grp, int limit)	2418	eio_grp_limit (eio_req *grp, int limit)
2040	{	2419	{
2041	grp->int2 = limit;	2420	grp->int2 = limit;
2042		2421
2043	grp_try_feed (grp);	2422	grp_try_feed (grp);
2044	}	2423	}
2045		2424
		2425	void
2046	void eio_grp_add (eio_req *grp, eio_req *req)	2426	eio_grp_add (eio_req *grp, eio_req *req)
2047	{	2427	{
2048	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2428	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
2049		2429
2050	grp->flags |= EIO_FLAG_GROUPADD;	2430	grp->flags |= EIO_FLAG_GROUPADD;
2051		2431
…		…
2062	}	2442	}
2063		2443
2064	/*****************************************************************************/	2444	/*****************************************************************************/
2065	/* misc garbage */	2445	/* misc garbage */
2066		2446
		2447	eio_ssize_t
2067	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)	2448	eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
2068	{	2449	{
2069	etp_worker wrk;	2450	etp_worker wrk;
2070	ssize_t ret;	2451	eio_ssize_t ret;
2071		2452
2072	wrk.dbuf = 0;	2453	wrk.dbuf = 0;
2073		2454
2074	ret = eio__sendfile (ofd, ifd, offset, count, &wrk);	2455	ret = eio__sendfile (ofd, ifd, offset, count, &wrk);
2075		2456

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