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Comparing libeio/eio.c (file contents):
Revision 1.61 by root, Fri Feb 11 00:53:24 2011 UTC vs.
Revision 1.86 by root, Thu Jul 14 18:30:10 2011 UTC

…		…
35	* and other provisions required by the GPL. If you do not delete the	35	* and other provisions required by the GPL. If you do not delete the
36	* provisions above, a recipient may use your version of this file under	36	* provisions above, a recipient may use your version of this file under
37	* either the BSD or the GPL.	37	* either the BSD or the GPL.
38	*/	38	*/
39		39
		40	#ifndef _WIN32
		41	# include "config.h"
		42	#endif
		43
40	#include "eio.h"	44	#include "eio.h"
		45	#include "ecb.h"
41		46
42	#ifdef EIO_STACKSIZE	47	#ifdef EIO_STACKSIZE
43	# define XTHREAD_STACKSIZE EIO_STACKSIZE	48	# define XTHREAD_STACKSIZE EIO_STACKSIZE
44	#endif	49	#endif
45	#include "xthread.h"	50	#include "xthread.h"
…		…
49	#include <stdlib.h>	54	#include <stdlib.h>
50	#include <string.h>	55	#include <string.h>
51	#include <errno.h>	56	#include <errno.h>
52	#include <sys/types.h>	57	#include <sys/types.h>
53	#include <sys/stat.h>	58	#include <sys/stat.h>
54	#include <sys/statvfs.h>
55	#include <limits.h>	59	#include <limits.h>
56	#include <fcntl.h>	60	#include <fcntl.h>
57	#include <assert.h>	61	#include <assert.h>
58		62
		63	#include <sys/statvfs.h>
		64	/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */
		65	/* intptr_t only comes from stdint.h, says idiot openbsd coder */
		66	#if HAVE_STDINT_H
		67	# include <stdint.h>
		68	#endif
		69
		70	#ifndef ECANCELED
		71	# define ECANCELED EDOM
		72	#endif
		73
		74	static void eio_destroy (eio_req *req);
		75
59	#ifndef EIO_FINISH	76	#ifndef EIO_FINISH
60	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	77	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
61	#endif	78	#endif
62		79
63	#ifndef EIO_DESTROY	80	#ifndef EIO_DESTROY
…		…
66		83
67	#ifndef EIO_FEED	84	#ifndef EIO_FEED
68	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)	85	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)
69	#endif	86	#endif
70		87
		88	#ifndef EIO_FD_TO_WIN32_HANDLE
		89	# define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		90	#endif
		91	#ifndef EIO_WIN32_HANDLE_TO_FD
		92	# define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		93	#endif
		94
		95	#define EIO_ERRNO(errval,retval) ((errno = errval), retval)
		96
		97	#define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1)
		98
71	#ifdef _WIN32	99	#ifdef _WIN32
72		100
73	/*doh*/	101	#define PAGESIZE 4096 /* GetSystemInfo? */
		102
		103	#define stat(path,buf) _stati64 (path,buf)
		104	#define lstat(path,buf) stat (path,buf)
		105	#define fstat(fd,buf) _fstati64 (path,buf)
		106	#define fsync(fd) (FlushFileBuffers (EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
		107	#define mkdir(path,mode) _mkdir (path)
		108	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
		109
		110	#define chown(path,uid,gid) EIO_ENOSYS ()
		111	#define fchown(fd,uid,gid) EIO_ENOSYS ()
		112	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
		113	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
		114	#define mknod(path,mode,dev) EIO_ENOSYS ()
		115	#define sync() EIO_ENOSYS ()
		116
		117	/* we could even stat and see if it exists */
		118	static int
		119	symlink (const char *old, const char *neu)
		120	{
		121	if (CreateSymbolicLink (neu, old, 1))
		122	return 0;
		123
		124	if (CreateSymbolicLink (neu, old, 0))
		125	return 0;
		126
		127	return EIO_ERRNO (ENOENT, -1);
		128	}
		129
74	#else	130	#else
75		131
76	# include "config.h"
77	# include <sys/time.h>	132	#include <sys/time.h>
78	# include <sys/select.h>	133	#include <sys/select.h>
		134	#include <sys/statvfs.h>
79	# include <unistd.h>	135	#include <unistd.h>
80	# include <utime.h>	136	#include <utime.h>
81	# include <signal.h>	137	#include <signal.h>
82	# include <dirent.h>	138	#include <dirent.h>
83		139
84	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES	140	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
85	# include <sys/mman.h>	141	#include <sys/mman.h>
86	#endif	142	#endif
87		143
88	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */	144	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
89	# if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__	145	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
90	# define _DIRENT_HAVE_D_TYPE /* sigh */	146	#define _DIRENT_HAVE_D_TYPE /* sigh */
91	# define D_INO(de) (de)->d_fileno	147	#define D_INO(de) (de)->d_fileno
92	# define D_NAMLEN(de) (de)->d_namlen	148	#define D_NAMLEN(de) (de)->d_namlen
93	# elif __linux || defined d_ino || _XOPEN_SOURCE >= 600	149	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
94	# define D_INO(de) (de)->d_ino	150	#define D_INO(de) (de)->d_ino
95	# endif	151	#endif
96		152
97	#ifdef _D_EXACT_NAMLEN	153	#ifdef _D_EXACT_NAMLEN
98	# undef D_NAMLEN	154	#undef D_NAMLEN
99	# define D_NAMLEN(de) _D_EXACT_NAMLEN (de)	155	#define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
100	#endif	156	#endif
101		157
102	# ifdef _DIRENT_HAVE_D_TYPE	158	#ifdef _DIRENT_HAVE_D_TYPE
103	# define D_TYPE(de) (de)->d_type	159	#define D_TYPE(de) (de)->d_type
104	# endif	160	#endif
105		161
106	# ifndef EIO_STRUCT_DIRENT	162	#ifndef EIO_STRUCT_DIRENT
107	# define EIO_STRUCT_DIRENT struct dirent	163	#define EIO_STRUCT_DIRENT struct dirent
108	# endif	164	#endif
109		165
110	#endif	166	#endif
111		167
112	#if HAVE_SENDFILE	168	#if HAVE_SENDFILE
113	# if __linux	169	# if __linux
…		…
132	#endif	188	#endif
133	#ifndef D_NAMLEN	189	#ifndef D_NAMLEN
134	# define D_NAMLEN(de) strlen ((de)->d_name)	190	# define D_NAMLEN(de) strlen ((de)->d_name)
135	#endif	191	#endif
136		192
137	/* number of seconds after which an idle threads exit */
138	#define IDLE_TIMEOUT 10
139
140	/* used for struct dirent, AIX doesn't provide it */	193	/* used for struct dirent, AIX doesn't provide it */
141	#ifndef NAME_MAX	194	#ifndef NAME_MAX
142	# define NAME_MAX 4096	195	# define NAME_MAX 4096
143	#endif	196	#endif
144		197
…		…
158	errno = ENOMEM; \	211	errno = ENOMEM; \
159	if (!eio_buf) \	212	if (!eio_buf) \
160	return -1;	213	return -1;
161		214
162	#define EIO_TICKS ((1000000 + 1023) >> 10)	215	#define EIO_TICKS ((1000000 + 1023) >> 10)
163
164	/*****************************************************************************/
165
166	#if __GNUC__ >= 3
167	# define expect(expr,value) __builtin_expect ((expr),(value))
168	#else
169	# define expect(expr,value) (expr)
170	#endif
171
172	#define expect_false(expr) expect ((expr) != 0, 0)
173	#define expect_true(expr) expect ((expr) != 0, 1)
174
175	/*****************************************************************************/
176		216
177	#define ETP_PRI_MIN EIO_PRI_MIN	217	#define ETP_PRI_MIN EIO_PRI_MIN
178	#define ETP_PRI_MAX EIO_PRI_MAX	218	#define ETP_PRI_MAX EIO_PRI_MAX
179		219
180	struct etp_worker;	220	struct etp_worker;
…		…
206	/*****************************************************************************/	246	/*****************************************************************************/
207		247
208	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)	248	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
209		249
210	/* calculate time difference in ~1/EIO_TICKS of a second */	250	/* calculate time difference in ~1/EIO_TICKS of a second */
		251	ecb_inline int
211	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	252	tvdiff (struct timeval *tv1, struct timeval *tv2)
212	{	253	{
213	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	254	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
214	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);	255	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
215	}	256	}
216		257
…		…
223	static unsigned int max_poll_reqs; /* reslock */	264	static unsigned int max_poll_reqs; /* reslock */
224		265
225	static volatile unsigned int nreqs; /* reqlock */	266	static volatile unsigned int nreqs; /* reqlock */
226	static volatile unsigned int nready; /* reqlock */	267	static volatile unsigned int nready; /* reqlock */
227	static volatile unsigned int npending; /* reqlock */	268	static volatile unsigned int npending; /* reqlock */
228	static volatile unsigned int max_idle = 4;	269	static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
		270	static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
229		271
230	static xmutex_t wrklock = X_MUTEX_INIT;	272	static xmutex_t wrklock;
231	static xmutex_t reslock = X_MUTEX_INIT;	273	static xmutex_t reslock;
232	static xmutex_t reqlock = X_MUTEX_INIT;	274	static xmutex_t reqlock;
233	static xcond_t reqwait = X_COND_INIT;	275	static xcond_t reqwait;
234		276
235	#if !HAVE_PREADWRITE	277	#if !HAVE_PREADWRITE
236	/*	278	/*
237	* make our pread/pwrite emulation safe against themselves, but not against	279	* make our pread/pwrite emulation safe against themselves, but not against
238	* normal read/write by using a mutex. slows down execution a lot,	280	* normal read/write by using a mutex. slows down execution a lot,
…		…
259	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)	301	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
260	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)	302	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
261		303
262	/* worker threads management */	304	/* worker threads management */
263		305
		306	static void ecb_cold
264	static void etp_worker_clear (etp_worker *wrk)	307	etp_worker_clear (etp_worker *wrk)
265	{	308	{
266	ETP_WORKER_CLEAR (wrk);	309	ETP_WORKER_CLEAR (wrk);
267	}	310	}
268		311
		312	static void ecb_cold
269	static void etp_worker_free (etp_worker *wrk)	313	etp_worker_free (etp_worker *wrk)
270	{	314	{
271	wrk->next->prev = wrk->prev;	315	wrk->next->prev = wrk->prev;
272	wrk->prev->next = wrk->next;	316	wrk->prev->next = wrk->next;
273		317
274	free (wrk);	318	free (wrk);
275	}	319	}
276		320
277	static unsigned int etp_nreqs (void)	321	static unsigned int
		322	etp_nreqs (void)
278	{	323	{
279	int retval;	324	int retval;
280	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	325	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
281	retval = nreqs;	326	retval = nreqs;
282	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	327	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
283	return retval;	328	return retval;
284	}	329	}
285		330
286	static unsigned int etp_nready (void)	331	static unsigned int
		332	etp_nready (void)
287	{	333	{
288	unsigned int retval;	334	unsigned int retval;
289		335
290	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	336	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
291	retval = nready;	337	retval = nready;
292	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	338	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
293		339
294	return retval;	340	return retval;
295	}	341	}
296		342
297	static unsigned int etp_npending (void)	343	static unsigned int
		344	etp_npending (void)
298	{	345	{
299	unsigned int retval;	346	unsigned int retval;
300		347
301	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	348	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
302	retval = npending;	349	retval = npending;
303	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	350	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
304		351
305	return retval;	352	return retval;
306	}	353	}
307		354
308	static unsigned int etp_nthreads (void)	355	static unsigned int
		356	etp_nthreads (void)
309	{	357	{
310	unsigned int retval;	358	unsigned int retval;
311		359
312	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	360	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
313	retval = started;	361	retval = started;
…		…
327	} etp_reqq;	375	} etp_reqq;
328		376
329	static etp_reqq req_queue;	377	static etp_reqq req_queue;
330	static etp_reqq res_queue;	378	static etp_reqq res_queue;
331		379
		380	static int ecb_noinline
332	static int reqq_push (etp_reqq *q, ETP_REQ *req)	381	reqq_push (etp_reqq *q, ETP_REQ *req)
333	{	382	{
334	int pri = req->pri;	383	int pri = req->pri;
335	req->next = 0;	384	req->next = 0;
336		385
337	if (q->qe[pri])	386	if (q->qe[pri])
…		…
343	q->qe[pri] = q->qs[pri] = req;	392	q->qe[pri] = q->qs[pri] = req;
344		393
345	return q->size++;	394	return q->size++;
346	}	395	}
347		396
		397	static ETP_REQ * ecb_noinline
348	static ETP_REQ *reqq_shift (etp_reqq *q)	398	reqq_shift (etp_reqq *q)
349	{	399	{
350	int pri;	400	int pri;
351		401
352	if (!q->size)	402	if (!q->size)
353	return 0;	403	return 0;
…		…
368	}	418	}
369		419
370	abort ();	420	abort ();
371	}	421	}
372		422
373	static void etp_atfork_prepare (void)	423	static void ecb_cold
		424	etp_thread_init (void)
374	{	425	{
375	X_LOCK (wrklock);
376	X_LOCK (reqlock);
377	X_LOCK (reslock);
378	#if !HAVE_PREADWRITE	426	#if !HAVE_PREADWRITE
379	X_LOCK (preadwritelock);	427	X_MUTEX_CREATE (preadwritelock);
380	#endif	428	#endif
		429	X_MUTEX_CREATE (wrklock);
		430	X_MUTEX_CREATE (reslock);
		431	X_MUTEX_CREATE (reqlock);
		432	X_COND_CREATE (reqwait);
381	}	433	}
382		434
		435	static void ecb_cold
		436	etp_atfork_prepare (void)
		437	{
		438	}
		439
		440	static void ecb_cold
383	static void etp_atfork_parent (void)	441	etp_atfork_parent (void)
384	{	442	{
385	#if !HAVE_PREADWRITE
386	X_UNLOCK (preadwritelock);
387	#endif
388	X_UNLOCK (reslock);
389	X_UNLOCK (reqlock);
390	X_UNLOCK (wrklock);
391	}	443	}
392		444
		445	static void ecb_cold
393	static void etp_atfork_child (void)	446	etp_atfork_child (void)
394	{	447	{
395	ETP_REQ *prv;	448	ETP_REQ *prv;
396		449
397	while ((prv = reqq_shift (&req_queue)))	450	while ((prv = reqq_shift (&req_queue)))
398	ETP_DESTROY (prv);	451	ETP_DESTROY (prv);
…		…
415	idle = 0;	468	idle = 0;
416	nreqs = 0;	469	nreqs = 0;
417	nready = 0;	470	nready = 0;
418	npending = 0;	471	npending = 0;
419		472
420	etp_atfork_parent ();	473	etp_thread_init ();
421	}	474	}
422		475
423	static void	476	static void ecb_cold
424	etp_once_init (void)	477	etp_once_init (void)
425	{	478	{
		479	etp_thread_init ();
426	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);	480	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
427	}	481	}
428		482
429	static int	483	static int ecb_cold
430	etp_init (void (*want_poll)(void), void (*done_poll)(void))	484	etp_init (void (*want_poll)(void), void (*done_poll)(void))
431	{	485	{
432	static pthread_once_t doinit = PTHREAD_ONCE_INIT;	486	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
433		487
434	pthread_once (&doinit, etp_once_init);	488	pthread_once (&doinit, etp_once_init);
…		…
439	return 0;	493	return 0;
440	}	494	}
441		495
442	X_THREAD_PROC (etp_proc);	496	X_THREAD_PROC (etp_proc);
443		497
		498	static void ecb_cold
444	static void etp_start_thread (void)	499	etp_start_thread (void)
445	{	500	{
446	etp_worker *wrk = calloc (1, sizeof (etp_worker));	501	etp_worker *wrk = calloc (1, sizeof (etp_worker));
447		502
448	/*TODO*/	503	/*TODO*/
449	assert (("unable to allocate worker thread data", wrk));	504	assert (("unable to allocate worker thread data", wrk));
…		…
462	free (wrk);	517	free (wrk);
463		518
464	X_UNLOCK (wrklock);	519	X_UNLOCK (wrklock);
465	}	520	}
466		521
		522	static void
467	static void etp_maybe_start_thread (void)	523	etp_maybe_start_thread (void)
468	{	524	{
469	if (expect_true (etp_nthreads () >= wanted))	525	if (ecb_expect_true (etp_nthreads () >= wanted))
470	return;	526	return;
471		527
472	/* todo: maybe use idle here, but might be less exact */	528	/* todo: maybe use idle here, but might be less exact */
473	if (expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))	529	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
474	return;	530	return;
475		531
476	etp_start_thread ();	532	etp_start_thread ();
477	}	533	}
478		534
		535	static void ecb_cold
479	static void etp_end_thread (void)	536	etp_end_thread (void)
480	{	537	{
481	eio_req *req = calloc (1, sizeof (eio_req));	538	eio_req *req = calloc (1, sizeof (eio_req));
482		539
483	req->type = -1;	540	req->type = -1;
484	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;	541	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
…		…
491	X_LOCK (wrklock);	548	X_LOCK (wrklock);
492	--started;	549	--started;
493	X_UNLOCK (wrklock);	550	X_UNLOCK (wrklock);
494	}	551	}
495		552
496	static int etp_poll (void)	553	static int
		554	etp_poll (void)
497	{	555	{
498	unsigned int maxreqs;	556	unsigned int maxreqs;
499	unsigned int maxtime;	557	unsigned int maxtime;
500	struct timeval tv_start, tv_now;	558	struct timeval tv_start, tv_now;
501		559
…		…
531		589
532	X_LOCK (reqlock);	590	X_LOCK (reqlock);
533	--nreqs;	591	--nreqs;
534	X_UNLOCK (reqlock);	592	X_UNLOCK (reqlock);
535		593
536	if (expect_false (req->type == EIO_GROUP && req->size))	594	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
537	{	595	{
538	req->int1 = 1; /* mark request as delayed */	596	req->int1 = 1; /* mark request as delayed */
539	continue;	597	continue;
540	}	598	}
541	else	599	else
542	{	600	{
543	int res = ETP_FINISH (req);	601	int res = ETP_FINISH (req);
544	if (expect_false (res))	602	if (ecb_expect_false (res))
545	return res;	603	return res;
546	}	604	}
547		605
548	if (expect_false (maxreqs && !--maxreqs))	606	if (ecb_expect_false (maxreqs && !--maxreqs))
549	break;	607	break;
550		608
551	if (maxtime)	609	if (maxtime)
552	{	610	{
553	gettimeofday (&tv_now, 0);	611	gettimeofday (&tv_now, 0);
…		…
559		617
560	errno = EAGAIN;	618	errno = EAGAIN;
561	return -1;	619	return -1;
562	}	620	}
563		621
		622	static void
564	static void etp_cancel (ETP_REQ *req)	623	etp_cancel (ETP_REQ *req)
565	{	624	{
566	X_LOCK (wrklock);	625	req->cancelled = 1;
567	req->flags |= EIO_FLAG_CANCELLED;
568	X_UNLOCK (wrklock);
569		626
570	eio_grp_cancel (req);	627	eio_grp_cancel (req);
571	}	628	}
572		629
		630	static void
573	static void etp_submit (ETP_REQ *req)	631	etp_submit (ETP_REQ *req)
574	{	632	{
575	req->pri -= ETP_PRI_MIN;	633	req->pri -= ETP_PRI_MIN;
576		634
577	if (expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;	635	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
578	if (expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;	636	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
579		637
580	if (expect_false (req->type == EIO_GROUP))	638	if (ecb_expect_false (req->type == EIO_GROUP))
581	{	639	{
582	/* I hope this is worth it :/ */	640	/* I hope this is worth it :/ */
583	X_LOCK (reqlock);	641	X_LOCK (reqlock);
584	++nreqs;	642	++nreqs;
585	X_UNLOCK (reqlock);	643	X_UNLOCK (reqlock);
…		…
604		662
605	etp_maybe_start_thread ();	663	etp_maybe_start_thread ();
606	}	664	}
607	}	665	}
608		666
		667	static void ecb_cold
609	static void etp_set_max_poll_time (double nseconds)	668	etp_set_max_poll_time (double nseconds)
610	{	669	{
611	if (WORDACCESS_UNSAFE) X_LOCK (reslock);	670	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
612	max_poll_time = nseconds * EIO_TICKS;	671	max_poll_time = nseconds * EIO_TICKS;
613	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);	672	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
614	}	673	}
615		674
		675	static void ecb_cold
616	static void etp_set_max_poll_reqs (unsigned int maxreqs)	676	etp_set_max_poll_reqs (unsigned int maxreqs)
617	{	677	{
618	if (WORDACCESS_UNSAFE) X_LOCK (reslock);	678	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
619	max_poll_reqs = maxreqs;	679	max_poll_reqs = maxreqs;
620	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);	680	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
621	}	681	}
622		682
		683	static void ecb_cold
623	static void etp_set_max_idle (unsigned int nthreads)	684	etp_set_max_idle (unsigned int nthreads)
624	{	685	{
625	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	686	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
626	max_idle = nthreads <= 0 ? 1 : nthreads;	687	max_idle = nthreads;
627	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	688	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
628	}	689	}
629		690
		691	static void ecb_cold
		692	etp_set_idle_timeout (unsigned int seconds)
		693	{
		694	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		695	idle_timeout = seconds;
		696	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		697	}
		698
		699	static void ecb_cold
630	static void etp_set_min_parallel (unsigned int nthreads)	700	etp_set_min_parallel (unsigned int nthreads)
631	{	701	{
632	if (wanted < nthreads)	702	if (wanted < nthreads)
633	wanted = nthreads;	703	wanted = nthreads;
634	}	704	}
635		705
		706	static void ecb_cold
636	static void etp_set_max_parallel (unsigned int nthreads)	707	etp_set_max_parallel (unsigned int nthreads)
637	{	708	{
638	if (wanted > nthreads)	709	if (wanted > nthreads)
639	wanted = nthreads;	710	wanted = nthreads;
640		711
641	while (started > wanted)	712	while (started > wanted)
642	etp_end_thread ();	713	etp_end_thread ();
643	}	714	}
644		715
645	/*****************************************************************************/	716	/*****************************************************************************/
646		717
		718	static void
647	static void grp_try_feed (eio_req *grp)	719	grp_try_feed (eio_req *grp)
648	{	720	{
649	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	721	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
650	{	722	{
651	grp->flags &= ~EIO_FLAG_GROUPADD;	723	grp->flags &= ~EIO_FLAG_GROUPADD;
652		724
…		…
659	break;	731	break;
660	}	732	}
661	}	733	}
662	}	734	}
663		735
		736	static int
664	static int grp_dec (eio_req *grp)	737	grp_dec (eio_req *grp)
665	{	738	{
666	--grp->size;	739	--grp->size;
667		740
668	/* call feeder, if applicable */	741	/* call feeder, if applicable */
669	grp_try_feed (grp);	742	grp_try_feed (grp);
…		…
673	return eio_finish (grp);	746	return eio_finish (grp);
674	else	747	else
675	return 0;	748	return 0;
676	}	749	}
677		750
		751	static void
678	void eio_destroy (eio_req *req)	752	eio_destroy (eio_req *req)
679	{	753	{
680	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);	754	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
681	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);	755	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
682		756
683	EIO_DESTROY (req);	757	EIO_DESTROY (req);
684	}	758	}
685		759
		760	static int
686	static int eio_finish (eio_req *req)	761	eio_finish (eio_req *req)
687	{	762	{
688	int res = EIO_FINISH (req);	763	int res = EIO_FINISH (req);
689		764
690	if (req->grp)	765	if (req->grp)
691	{	766	{
…		…
699	if (grp->grp_first == req)	774	if (grp->grp_first == req)
700	grp->grp_first = req->grp_next;	775	grp->grp_first = req->grp_next;
701		776
702	res2 = grp_dec (grp);	777	res2 = grp_dec (grp);
703		778
704	if (!res && res2)	779	if (!res)
705	res = res2;	780	res = res2;
706	}	781	}
707		782
708	eio_destroy (req);	783	eio_destroy (req);
709		784
710	return res;	785	return res;
711	}	786	}
712		787
		788	void
713	void eio_grp_cancel (eio_req *grp)	789	eio_grp_cancel (eio_req *grp)
714	{	790	{
715	for (grp = grp->grp_first; grp; grp = grp->grp_next)	791	for (grp = grp->grp_first; grp; grp = grp->grp_next)
716	eio_cancel (grp);	792	eio_cancel (grp);
717	}	793	}
718		794
		795	void
719	void eio_cancel (eio_req *req)	796	eio_cancel (eio_req *req)
720	{	797	{
721	etp_cancel (req);	798	etp_cancel (req);
722	}	799	}
723		800
		801	void
724	void eio_submit (eio_req *req)	802	eio_submit (eio_req *req)
725	{	803	{
726	etp_submit (req);	804	etp_submit (req);
727	}	805	}
728		806
729	unsigned int eio_nreqs (void)	807	unsigned int
		808	eio_nreqs (void)
730	{	809	{
731	return etp_nreqs ();	810	return etp_nreqs ();
732	}	811	}
733		812
734	unsigned int eio_nready (void)	813	unsigned int
		814	eio_nready (void)
735	{	815	{
736	return etp_nready ();	816	return etp_nready ();
737	}	817	}
738		818
739	unsigned int eio_npending (void)	819	unsigned int
		820	eio_npending (void)
740	{	821	{
741	return etp_npending ();	822	return etp_npending ();
742	}	823	}
743		824
744	unsigned int eio_nthreads (void)	825	unsigned int ecb_cold
		826	eio_nthreads (void)
745	{	827	{
746	return etp_nthreads ();	828	return etp_nthreads ();
747	}	829	}
748		830
		831	void ecb_cold
749	void eio_set_max_poll_time (double nseconds)	832	eio_set_max_poll_time (double nseconds)
750	{	833	{
751	etp_set_max_poll_time (nseconds);	834	etp_set_max_poll_time (nseconds);
752	}	835	}
753		836
		837	void ecb_cold
754	void eio_set_max_poll_reqs (unsigned int maxreqs)	838	eio_set_max_poll_reqs (unsigned int maxreqs)
755	{	839	{
756	etp_set_max_poll_reqs (maxreqs);	840	etp_set_max_poll_reqs (maxreqs);
757	}	841	}
758		842
		843	void ecb_cold
759	void eio_set_max_idle (unsigned int nthreads)	844	eio_set_max_idle (unsigned int nthreads)
760	{	845	{
761	etp_set_max_idle (nthreads);	846	etp_set_max_idle (nthreads);
762	}	847	}
763		848
		849	void ecb_cold
		850	eio_set_idle_timeout (unsigned int seconds)
		851	{
		852	etp_set_idle_timeout (seconds);
		853	}
		854
		855	void ecb_cold
764	void eio_set_min_parallel (unsigned int nthreads)	856	eio_set_min_parallel (unsigned int nthreads)
765	{	857	{
766	etp_set_min_parallel (nthreads);	858	etp_set_min_parallel (nthreads);
767	}	859	}
768		860
		861	void ecb_cold
769	void eio_set_max_parallel (unsigned int nthreads)	862	eio_set_max_parallel (unsigned int nthreads)
770	{	863	{
771	etp_set_max_parallel (nthreads);	864	etp_set_max_parallel (nthreads);
772	}	865	}
773		866
774	int eio_poll (void)	867	int eio_poll (void)
…		…
844	#ifndef HAVE_FUTIMES	937	#ifndef HAVE_FUTIMES
845		938
846	# undef futimes	939	# undef futimes
847	# define futimes(fd,times) eio__futimes (fd, times)	940	# define futimes(fd,times) eio__futimes (fd, times)
848		941
		942	static int
849	static int eio__futimes (int fd, const struct timeval tv[2])	943	eio__futimes (int fd, const struct timeval tv[2])
850	{	944	{
851	errno = ENOSYS;	945	errno = ENOSYS;
852	return -1;	946	return -1;
853	}	947	}
854		948
…		…
858	# undef fdatasync	952	# undef fdatasync
859	# define fdatasync(fd) fsync (fd)	953	# define fdatasync(fd) fsync (fd)
860	#endif	954	#endif
861		955
862	/* sync_file_range always needs emulation */	956	/* sync_file_range always needs emulation */
863	int	957	static int
864	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)	958	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
865	{	959	{
866	#if HAVE_SYNC_FILE_RANGE	960	#if HAVE_SYNC_FILE_RANGE
867	int res;	961	int res;
868		962
…		…
885	/* even though we could play tricks with the flags, it's better to always	979	/* even though we could play tricks with the flags, it's better to always
886	* call fdatasync, as that matches the expectation of its users best */	980	* call fdatasync, as that matches the expectation of its users best */
887	return fdatasync (fd);	981	return fdatasync (fd);
888	}	982	}
889		983
		984	static int
		985	eio__fallocate (int fd, int mode, off_t offset, size_t len)
		986	{
		987	#if HAVE_FALLOCATE
		988	return fallocate (fd, mode, offset, len);
		989	#else
		990	errno = ENOSYS;
		991	return -1;
		992	#endif
		993	}
		994
890	#if !HAVE_READAHEAD	995	#if !HAVE_READAHEAD
891	# undef readahead	996	# undef readahead
892	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)	997	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
893		998
894	static ssize_t	999	static ssize_t
…		…
914		1019
915	/* sendfile always needs emulation */	1020	/* sendfile always needs emulation */
916	static ssize_t	1021	static ssize_t
917	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)	1022	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
918	{	1023	{
		1024	ssize_t written = 0;
919	ssize_t res;	1025	ssize_t res;
920		1026
921	if (!count)	1027	if (!count)
922	return 0;	1028	return 0;
923		1029
		1030	for (;;)
		1031	{
		1032	#ifdef __APPLE__
		1033	# undef HAVE_SENDFILE /* broken, as everything on os x */
		1034	#endif
924	#if HAVE_SENDFILE	1035	#if HAVE_SENDFILE
925	# if __linux	1036	# if __linux
		1037	off_t soffset = offset;
926	res = sendfile (ofd, ifd, &offset, count);	1038	res = sendfile (ofd, ifd, &soffset, count);
927		1039
928	# elif __FreeBSD__	1040	# elif __FreeBSD__
929	/*	1041	/*
930	* Of course, the freebsd sendfile is a dire hack with no thoughts	1042	* Of course, the freebsd sendfile is a dire hack with no thoughts
931	* wasted on making it similar to other I/O functions.	1043	* wasted on making it similar to other I/O functions.
932	*/	1044	*/
933	{
934	off_t sbytes;	1045	off_t sbytes;
935	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	1046	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
936		1047
937	#if 0 /* according to the manpage, this is correct, but broken behaviour */	1048	#if 0 /* according to the manpage, this is correct, but broken behaviour */
938	/* freebsd' sendfile will return 0 on success */	1049	/* freebsd' sendfile will return 0 on success */
939	/* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */	1050	/* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
940	/* not on e.g. EIO or EPIPE - sounds broken */	1051	/* not on e.g. EIO or EPIPE - sounds broken */
941	if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)	1052	if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
942	res = sbytes;	1053	res = sbytes;
943	#endif	1054	#endif
944		1055
945	/* according to source inspection, this is correct, and useful behaviour */	1056	/* according to source inspection, this is correct, and useful behaviour */
946	if (sbytes)	1057	if (sbytes)
947	res = sbytes;	1058	res = sbytes;
948	}
949		1059
950	# elif defined (__APPLE__)	1060	# elif defined (__APPLE__)
951
952	{
953	off_t sbytes = count;	1061	off_t sbytes = count;
954	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);	1062	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
955		1063
956	/* according to the manpage, sbytes is always valid */	1064	/* according to the manpage, sbytes is always valid */
957	if (sbytes)	1065	if (sbytes)
958	res = sbytes;	1066	res = sbytes;
959	}
960		1067
961	# elif __hpux	1068	# elif __hpux
962	res = sendfile (ofd, ifd, offset, count, 0, 0);	1069	res = sendfile (ofd, ifd, offset, count, 0, 0);
963		1070
964	# elif __solaris	1071	# elif __solaris
965	{
966	struct sendfilevec vec;	1072	struct sendfilevec vec;
967	size_t sbytes;	1073	size_t sbytes;
968		1074
969	vec.sfv_fd = ifd;	1075	vec.sfv_fd = ifd;
970	vec.sfv_flag = 0;	1076	vec.sfv_flag = 0;
971	vec.sfv_off = offset;	1077	vec.sfv_off = offset;
972	vec.sfv_len = count;	1078	vec.sfv_len = count;
973		1079
974	res = sendfilev (ofd, &vec, 1, &sbytes);	1080	res = sendfilev (ofd, &vec, 1, &sbytes);
975		1081
976	if (res < 0 && sbytes)	1082	if (res < 0 && sbytes)
977	res = sbytes;	1083	res = sbytes;
978	}
979		1084
980	# endif	1085	# endif
981		1086
982	#elif defined (_WIN32)	1087	#elif defined (_WIN32) && 0
983
984	/* does not work, just for documentation of what would need to be done */	1088	/* does not work, just for documentation of what would need to be done */
985	{	1089	/* actually, cannot be done like this, as TransmitFile changes the file offset, */
		1090	/* libeio guarantees that the file offset does not change, and windows */
		1091	/* has no way to get an independent handle to the same file description */
986	HANDLE h = TO_SOCKET (ifd);	1092	HANDLE h = TO_SOCKET (ifd);
987	SetFilePointer (h, offset, 0, FILE_BEGIN);	1093	SetFilePointer (h, offset, 0, FILE_BEGIN);
988	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);	1094	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
989	}
990		1095
991	#else	1096	#else
992	res = -1;	1097	res = -1;
993	errno = ENOSYS;	1098	errno = ENOSYS;
994	#endif	1099	#endif
995		1100
		1101	/* we assume sendfile can copy at least 128mb in one go */
		1102	if (res <= 128 * 1024 * 1024)
		1103	{
		1104	if (res > 0)
		1105	written += res;
		1106
		1107	if (written)
		1108	return written;
		1109
		1110	break;
		1111	}
		1112	else
		1113	{
		1114	/* if we requested more, then probably the kernel was lazy */
		1115	written += res;
		1116	offset += res;
		1117	count -= res;
		1118
		1119	if (!count)
		1120	return written;
		1121	}
		1122	}
		1123
996	if (res < 0	1124	if (res < 0
997	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	1125	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
998	/* BSDs */	1126	/* BSDs */
999	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */	1127	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
1000	|| errno == ENOTSUP	1128	|| errno == ENOTSUP
1001	#endif	1129	#endif
…		…
1038	}	1166	}
1039		1167
1040	return res;	1168	return res;
1041	}	1169	}
1042		1170
		1171	#ifdef PAGESIZE
		1172	# define eio_pagesize() PAGESIZE
		1173	#else
		1174	static intptr_t
		1175	eio_pagesize (void)
		1176	{
		1177	static intptr_t page;
		1178
		1179	if (!page)
		1180	page = sysconf (_SC_PAGESIZE);
		1181
		1182	return page;
		1183	}
		1184	#endif
		1185
		1186	static void
		1187	eio_page_align (void **addr, size_t *length)
		1188	{
		1189	intptr_t mask = eio_pagesize () - 1;
		1190
		1191	/* round down addr */
		1192	intptr_t adj = mask & (intptr_t)*addr;
		1193
		1194	*addr = (void *)((intptr_t)*addr - adj);
		1195	*length += adj;
		1196
		1197	/* round up length */
		1198	*length = (*length + mask) & ~mask;
		1199	}
		1200
		1201	#if !_POSIX_MEMLOCK
		1202	# define eio__mlockall(a) eio_nosyscall()
		1203	#else
		1204
		1205	static int
		1206	eio__mlockall (int flags)
		1207	{
		1208	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1209	extern int mallopt (int, int);
		1210	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1211	#endif
		1212
		1213	if (EIO_MCL_CURRENT != MCL_CURRENT
		1214	|| EIO_MCL_FUTURE != MCL_FUTURE)
		1215	{
		1216	flags = 0
		1217	| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
		1218	| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
		1219	}
		1220
		1221	return mlockall (flags);
		1222	}
		1223	#endif
		1224
		1225	#if !_POSIX_MEMLOCK_RANGE
		1226	# define eio__mlock(a,b) EIO_ENOSYS ()
		1227	#else
		1228
		1229	static int
		1230	eio__mlock (void *addr, size_t length)
		1231	{
		1232	eio_page_align (&addr, &length);
		1233
		1234	return mlock (addr, length);
		1235	}
		1236
		1237	#endif
		1238
		1239	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1240	# define eio__msync(a,b,c) EIO_ENOSYS ()
		1241	#else
		1242
		1243	static int
		1244	eio__msync (void *mem, size_t len, int flags)
		1245	{
		1246	eio_page_align (&mem, &len);
		1247
		1248	if (EIO_MS_ASYNC != MS_SYNC
		1249	|| EIO_MS_INVALIDATE != MS_INVALIDATE
		1250	|| EIO_MS_SYNC != MS_SYNC)
		1251	{
		1252	flags = 0
		1253	| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
		1254	| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
		1255	| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
		1256	}
		1257
		1258	return msync (mem, len, flags);
		1259	}
		1260
		1261	#endif
		1262
		1263	static int
		1264	eio__mtouch (eio_req *req)
		1265	{
		1266	void *mem = req->ptr2;
		1267	size_t len = req->size;
		1268	int flags = req->int1;
		1269
		1270	eio_page_align (&mem, &len);
		1271
		1272	{
		1273	intptr_t addr = (intptr_t)mem;
		1274	intptr_t end = addr + len;
		1275	intptr_t page = eio_pagesize ();
		1276
		1277	if (addr < end)
		1278	if (flags & EIO_MT_MODIFY) /* modify */
		1279	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1280	else
		1281	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1282	}
		1283
		1284	return 0;
		1285	}
		1286
		1287	/*****************************************************************************/
		1288	/* requests implemented outside eio_execute, because they are so large */
		1289
		1290	static void
		1291	eio__realpath (eio_req *req, etp_worker *self)
		1292	{
		1293	char *rel = req->ptr1;
		1294	char *res;
		1295	char *tmp1, *tmp2;
		1296	#if SYMLOOP_MAX > 32
		1297	int symlinks = SYMLOOP_MAX;
		1298	#else
		1299	int symlinks = 32;
		1300	#endif
		1301
		1302	req->result = -1;
		1303
		1304	errno = EINVAL;
		1305	if (!rel)
		1306	return;
		1307
		1308	errno = ENOENT;
		1309	if (!*rel)
		1310	return;
		1311
		1312	if (!req->ptr2)
		1313	{
		1314	X_LOCK (wrklock);
		1315	req->flags |= EIO_FLAG_PTR2_FREE;
		1316	X_UNLOCK (wrklock);
		1317	req->ptr2 = malloc (PATH_MAX * 3);
		1318
		1319	errno = ENOMEM;
		1320	if (!req->ptr2)
		1321	return;
		1322	}
		1323
		1324	res = req->ptr2;
		1325	tmp1 = res + PATH_MAX;
		1326	tmp2 = tmp1 + PATH_MAX;
		1327
		1328	#if 0 /* disabled, the musl way to do things is just too racy */
		1329	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
		1330	/* on linux we may be able to ask the kernel */
		1331	{
		1332	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
		1333
		1334	if (fd >= 0)
		1335	{
		1336	sprintf (tmp1, "/proc/self/fd/%d", fd);
		1337	req->result = readlink (tmp1, res, PATH_MAX);
		1338	close (fd);
		1339
		1340	/* here we should probably stat the open file and the disk file, to make sure they still match */
		1341
		1342	if (req->result > 0)
		1343	goto done;
		1344	}
		1345	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
		1346	return;
		1347	}
		1348	#endif
		1349	#endif
		1350
		1351	if (*rel != '/')
		1352	{
		1353	if (!getcwd (res, PATH_MAX))
		1354	return;
		1355
		1356	if (res [1]) /* only use if not / */
		1357	res += strlen (res);
		1358	}
		1359
		1360	while (*rel)
		1361	{
		1362	ssize_t len, linklen;
		1363	char *beg = rel;
		1364
		1365	while (*rel && *rel != '/')
		1366	++rel;
		1367
		1368	len = rel - beg;
		1369
		1370	if (!len) /* skip slashes */
		1371	{
		1372	++rel;
		1373	continue;
		1374	}
		1375
		1376	if (beg [0] == '.')
		1377	{
		1378	if (len == 1)
		1379	continue; /* . - nop */
		1380
		1381	if (beg [1] == '.' && len == 2)
		1382	{
		1383	/* .. - back up one component, if possible */
		1384
		1385	while (res != req->ptr2)
		1386	if (*--res == '/')
		1387	break;
		1388
		1389	continue;
		1390	}
		1391	}
		1392
		1393	errno = ENAMETOOLONG;
		1394	if (res + 1 + len + 1 >= tmp1)
		1395	return;
		1396
		1397	/* copy one component */
		1398	*res = '/';
		1399	memcpy (res + 1, beg, len);
		1400
		1401	/* zero-terminate, for readlink */
		1402	res [len + 1] = 0;
		1403
		1404	/* now check if it's a symlink */
		1405	linklen = readlink (req->ptr2, tmp1, PATH_MAX);
		1406
		1407	if (linklen < 0)
		1408	{
		1409	if (errno != EINVAL)
		1410	return;
		1411
		1412	/* it's a normal directory. hopefully */
		1413	res += len + 1;
		1414	}
		1415	else
		1416	{
		1417	/* yay, it was a symlink - build new path in tmp2 */
		1418	int rellen = strlen (rel);
		1419
		1420	errno = ENAMETOOLONG;
		1421	if (linklen + 1 + rellen >= PATH_MAX)
		1422	return;
		1423
		1424	errno = ELOOP;
		1425	if (!--symlinks)
		1426	return;
		1427
		1428	if (*tmp1 == '/')
		1429	res = req->ptr2; /* symlink resolves to an absolute path */
		1430
		1431	/* we need to be careful, as rel might point into tmp2 already */
		1432	memmove (tmp2 + linklen + 1, rel, rellen + 1);
		1433	tmp2 [linklen] = '/';
		1434	memcpy (tmp2, tmp1, linklen);
		1435
		1436	rel = tmp2;
		1437	}
		1438	}
		1439
		1440	/* special case for the lone root path */
		1441	if (res == req->ptr2)
		1442	*res++ = '/';
		1443
		1444	req->result = res - (char *)req->ptr2;
		1445
		1446	done:
		1447	req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */
		1448	}
		1449
1043	static signed char	1450	static signed char
1044	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)	1451	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
1045	{	1452	{
1046	return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */	1453	return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
1047	: a->inode < b->inode ? -1 : a->inode > b->inode ? 1 : 0;	1454	: a->inode < b->inode ? -1
		1455	: a->inode > b->inode ? 1
		1456	: 0;
1048	}	1457	}
1049		1458
1050	#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0	1459	#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
1051		1460
1052	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */	1461	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
…		…
1058	unsigned char bits [9 + sizeof (ino_t) * 8];	1467	unsigned char bits [9 + sizeof (ino_t) * 8];
1059	unsigned char *bit = bits;	1468	unsigned char *bit = bits;
1060		1469
1061	assert (CHAR_BIT == 8);	1470	assert (CHAR_BIT == 8);
1062	assert (sizeof (eio_dirent) * 8 < 256);	1471	assert (sizeof (eio_dirent) * 8 < 256);
1063	assert (offsetof (eio_dirent, inode)); /* we use 0 as sentinel */	1472	assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
1064	assert (offsetof (eio_dirent, score)); /* we use 0 as sentinel */	1473	assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */
1065		1474
1066	if (size <= EIO_SORT_FAST)	1475	if (size <= EIO_SORT_FAST)
1067	return;	1476	return;
1068		1477
1069	/* first prepare an array of bits to test in our radix sort */	1478	/* first prepare an array of bits to test in our radix sort */
…		…
1224	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);	1633	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
1225		1634
1226	X_LOCK (wrklock);	1635	X_LOCK (wrklock);
1227	/* the corresponding closedir is in ETP_WORKER_CLEAR */	1636	/* the corresponding closedir is in ETP_WORKER_CLEAR */
1228	self->dirp = dirp = opendir (req->ptr1);	1637	self->dirp = dirp = opendir (req->ptr1);
		1638
		1639	if (req->flags & EIO_FLAG_PTR1_FREE)
		1640	free (req->ptr1);
		1641
1229	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;	1642	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
1230	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;	1643	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
1231	req->ptr2 = names = malloc (namesalloc);	1644	req->ptr2 = names = malloc (namesalloc);
1232	X_UNLOCK (wrklock);	1645	X_UNLOCK (wrklock);
1233		1646
…		…
1245	/* sort etc. */	1658	/* sort etc. */
1246	req->int1 = flags;	1659	req->int1 = flags;
1247	req->result = dentoffs;	1660	req->result = dentoffs;
1248		1661
1249	if (flags & EIO_READDIR_STAT_ORDER)	1662	if (flags & EIO_READDIR_STAT_ORDER)
1250	eio_dent_sort (dents, dentoffs, 0, inode_bits); /* sort by inode exclusively */	1663	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
1251	else if (flags & EIO_READDIR_DIRS_FIRST)	1664	else if (flags & EIO_READDIR_DIRS_FIRST)
1252	if (flags & EIO_READDIR_FOUND_UNKNOWN)	1665	if (flags & EIO_READDIR_FOUND_UNKNOWN)
1253	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */	1666	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
1254	else	1667	else
1255	{	1668	{
…		…
1257	eio_dirent *oth = dents + dentoffs;	1670	eio_dirent *oth = dents + dentoffs;
1258	eio_dirent *dir = dents;	1671	eio_dirent *dir = dents;
1259		1672
1260	/* now partition dirs to the front, and non-dirs to the back */	1673	/* now partition dirs to the front, and non-dirs to the back */
1261	/* by walking from both sides and swapping if necessary */	1674	/* by walking from both sides and swapping if necessary */
1262	/* also clear score, so it doesn't influence sorting */
1263	while (oth > dir)	1675	while (oth > dir)
1264	{	1676	{
1265	if (dir->type == EIO_DT_DIR)	1677	if (dir->type == EIO_DT_DIR)
1266	++dir;	1678	++dir;
1267	else if ((--oth)->type == EIO_DT_DIR)	1679	else if ((--oth)->type == EIO_DT_DIR)
…		…
1270		1682
1271	++dir;	1683	++dir;
1272	}	1684	}
1273	}	1685	}
1274		1686
1275	/* now sort the dirs only */	1687	/* now sort the dirs only (dirs all have the same score) */
1276	eio_dent_sort (dents, dir - dents, 0, inode_bits);	1688	eio_dent_sort (dents, dir - dents, 0, inode_bits);
1277	}	1689	}
1278		1690
1279	break;	1691	break;
1280	}	1692	}
…		…
1285	/* skip . and .. entries */	1697	/* skip . and .. entries */
1286	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1698	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1287	{	1699	{
1288	int len = D_NAMLEN (entp) + 1;	1700	int len = D_NAMLEN (entp) + 1;
1289		1701
1290	while (expect_false (namesoffs + len > namesalloc))	1702	while (ecb_expect_false (namesoffs + len > namesalloc))
1291	{	1703	{
1292	namesalloc *= 2;	1704	namesalloc *= 2;
1293	X_LOCK (wrklock);	1705	X_LOCK (wrklock);
1294	req->ptr2 = names = realloc (names, namesalloc);	1706	req->ptr2 = names = realloc (names, namesalloc);
1295	X_UNLOCK (wrklock);	1707	X_UNLOCK (wrklock);
…		…
1302		1714
1303	if (dents)	1715	if (dents)
1304	{	1716	{
1305	struct eio_dirent *ent;	1717	struct eio_dirent *ent;
1306		1718
1307	if (expect_false (dentoffs == dentalloc))	1719	if (ecb_expect_false (dentoffs == dentalloc))
1308	{	1720	{
1309	dentalloc *= 2;	1721	dentalloc *= 2;
1310	X_LOCK (wrklock);	1722	X_LOCK (wrklock);
1311	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));	1723	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
1312	X_UNLOCK (wrklock);	1724	X_UNLOCK (wrklock);
…		…
1400	break;	1812	break;
1401	}	1813	}
1402	}	1814	}
1403	}	1815	}
1404		1816
1405	#ifdef PAGESIZE
1406	# define eio_pagesize() PAGESIZE
1407	#else
1408	static intptr_t
1409	eio_pagesize (void)
1410	{
1411	static intptr_t page;
1412
1413	if (!page)
1414	page = sysconf (_SC_PAGESIZE);
1415
1416	return page;
1417	}
1418	#endif
1419
1420	static void
1421	eio_page_align (void **addr, size_t *length)
1422	{
1423	intptr_t mask = eio_pagesize () - 1;
1424
1425	/* round down addr */
1426	intptr_t adj = mask & (intptr_t)*addr;
1427
1428	*addr = (void *)((intptr_t)*addr - adj);
1429	*length += adj;
1430
1431	/* round up length */
1432	*length = (*length + mask) & ~mask;
1433	}
1434
1435	#if !_POSIX_MEMLOCK
1436	# define eio__mlockall(a) ((errno = ENOSYS), -1)
1437	#else
1438
1439	static int
1440	eio__mlockall (int flags)
1441	{
1442	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
1443	extern int mallopt (int, int);
1444	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
1445	#endif
1446
1447	if (EIO_MCL_CURRENT != MCL_CURRENT
1448	|| EIO_MCL_FUTURE != MCL_FUTURE)
1449	{
1450	flags = 0
1451	| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
1452	| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
1453	}
1454
1455	return mlockall (flags);
1456	}
1457	#endif
1458
1459	#if !_POSIX_MEMLOCK_RANGE
1460	# define eio__mlock(a,b) ((errno = ENOSYS), -1)
1461	#else
1462
1463	static int
1464	eio__mlock (void *addr, size_t length)
1465	{
1466	eio_page_align (&addr, &length);
1467
1468	return mlock (addr, length);
1469	}
1470
1471	#endif
1472
1473	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
1474	# define eio__msync(a,b,c) ((errno = ENOSYS), -1)
1475	#else
1476
1477	int
1478	eio__msync (void *mem, size_t len, int flags)
1479	{
1480	eio_page_align (&mem, &len);
1481
1482	if (EIO_MS_ASYNC != MS_SYNC
1483	|| EIO_MS_INVALIDATE != MS_INVALIDATE
1484	|| EIO_MS_SYNC != MS_SYNC)
1485	{
1486	flags = 0
1487	| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
1488	| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
1489	| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
1490	}
1491
1492	return msync (mem, len, flags);
1493	}
1494
1495	#endif
1496
1497	int
1498	eio__mtouch (void *mem, size_t len, int flags)
1499	{
1500	eio_page_align (&mem, &len);
1501
1502	{
1503	intptr_t addr = (intptr_t)mem;
1504	intptr_t end = addr + len;
1505	intptr_t page = eio_pagesize ();
1506
1507	if (addr < end)
1508	if (flags & EIO_MT_MODIFY) /* modify */
1509	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len);
1510	else
1511	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len);
1512	}
1513
1514	return 0;
1515	}
1516
1517	/*****************************************************************************/	1817	/*****************************************************************************/
1518		1818
1519	#define ALLOC(len) \	1819	#define ALLOC(len) \
1520	if (!req->ptr2) \	1820	if (!req->ptr2) \
1521	{ \	1821	{ \
…		…
1534	X_THREAD_PROC (etp_proc)	1834	X_THREAD_PROC (etp_proc)
1535	{	1835	{
1536	ETP_REQ *req;	1836	ETP_REQ *req;
1537	struct timespec ts;	1837	struct timespec ts;
1538	etp_worker *self = (etp_worker *)thr_arg;	1838	etp_worker *self = (etp_worker *)thr_arg;
		1839	int timeout;
1539		1840
1540	/* try to distribute timeouts somewhat randomly */	1841	/* try to distribute timeouts somewhat evenly */
1541	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1842	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
1542		1843
1543	for (;;)	1844	for (;;)
1544	{	1845	{
		1846	ts.tv_sec = 0;
		1847
1545	X_LOCK (reqlock);	1848	X_LOCK (reqlock);
1546		1849
1547	for (;;)	1850	for (;;)
1548	{	1851	{
1549	self->req = req = reqq_shift (&req_queue);	1852	self->req = req = reqq_shift (&req_queue);
1550		1853
1551	if (req)	1854	if (req)
1552	break;	1855	break;
1553		1856
		1857	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
		1858	{
		1859	X_UNLOCK (reqlock);
		1860	X_LOCK (wrklock);
		1861	--started;
		1862	X_UNLOCK (wrklock);
		1863	goto quit;
		1864	}
		1865
1554	++idle;	1866	++idle;
1555		1867
1556	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1868	if (idle <= max_idle)
1557	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1869	/* we are allowed to idle, so do so without any timeout */
		1870	X_COND_WAIT (reqwait, reqlock);
		1871	else
1558	{	1872	{
1559	if (idle > max_idle)	1873	/* initialise timeout once */
1560	{	1874	if (!ts.tv_sec)
1561	--idle;	1875	ts.tv_sec = time (0) + idle_timeout;
1562	X_UNLOCK (reqlock);
1563	X_LOCK (wrklock);
1564	--started;
1565	X_UNLOCK (wrklock);
1566	goto quit;
1567	}
1568		1876
1569	/* we are allowed to idle, so do so without any timeout */
1570	X_COND_WAIT (reqwait, reqlock);	1877	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
		1878	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
1571	}	1879	}
1572		1880
1573	--idle;	1881	--idle;
1574	}	1882	}
1575		1883
…		…
1578	X_UNLOCK (reqlock);	1886	X_UNLOCK (reqlock);
1579		1887
1580	if (req->type < 0)	1888	if (req->type < 0)
1581	goto quit;	1889	goto quit;
1582		1890
1583	if (!EIO_CANCELLED (req))
1584	ETP_EXECUTE (self, req);	1891	ETP_EXECUTE (self, req);
1585		1892
1586	X_LOCK (reslock);	1893	X_LOCK (reslock);
1587		1894
1588	++npending;	1895	++npending;
1589		1896
…		…
1604	return 0;	1911	return 0;
1605	}	1912	}
1606		1913
1607	/*****************************************************************************/	1914	/*****************************************************************************/
1608		1915
		1916	int ecb_cold
1609	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1917	eio_init (void (*want_poll)(void), void (*done_poll)(void))
1610	{	1918	{
1611	return etp_init (want_poll, done_poll);	1919	return etp_init (want_poll, done_poll);
1612	}	1920	}
1613		1921
		1922	ecb_inline void
1614	static void eio_api_destroy (eio_req *req)	1923	eio_api_destroy (eio_req *req)
1615	{	1924	{
1616	free (req);	1925	free (req);
1617	}	1926	}
1618		1927
1619	#define REQ(rtype) \	1928	#define REQ(rtype) \
…		…
1638	{ \	1947	{ \
1639	eio_api_destroy (req); \	1948	eio_api_destroy (req); \
1640	return 0; \	1949	return 0; \
1641	}	1950	}
1642		1951
		1952	static void
1643	static void eio_execute (etp_worker *self, eio_req *req)	1953	eio_execute (etp_worker *self, eio_req *req)
1644	{	1954	{
		1955	if (ecb_expect_false (EIO_CANCELLED (req)))
		1956	{
		1957	req->result = -1;
		1958	req->errorno = ECANCELED;
		1959	return;
		1960	}
		1961
1645	switch (req->type)	1962	switch (req->type)
1646	{	1963	{
1647	case EIO_READ: ALLOC (req->size);	1964	case EIO_READ: ALLOC (req->size);
1648	req->result = req->offs >= 0	1965	req->result = req->offs >= 0
1649	? pread (req->int1, req->ptr2, req->size, req->offs)	1966	? pread (req->int1, req->ptr2, req->size, req->offs)
…		…
1683	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;	2000	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
1684	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;	2001	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
1685	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;	2002	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
1686	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;	2003	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
1687		2004
		2005	case EIO_REALPATH: eio__realpath (req, self); break;
		2006
1688	case EIO_READLINK: ALLOC (PATH_MAX);	2007	case EIO_READLINK: ALLOC (PATH_MAX);
1689	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;	2008	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
1690		2009
1691	case EIO_SYNC: req->result = 0; sync (); break;	2010	case EIO_SYNC: req->result = 0; sync (); break;
1692	case EIO_FSYNC: req->result = fsync (req->int1); break;	2011	case EIO_FSYNC: req->result = fsync (req->int1); break;
1693	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;	2012	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
1694	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;	2013	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
1695	case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break;	2014	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
1696	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;	2015	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
1697	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;	2016	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
1698	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;	2017	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		2018	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
1699		2019
1700	case EIO_READDIR: eio__scandir (req, self); break;	2020	case EIO_READDIR: eio__scandir (req, self); break;
1701		2021
1702	case EIO_BUSY:	2022	case EIO_BUSY:
1703	#ifdef _WIN32	2023	#ifdef _WIN32
…		…
1744	case EIO_NOP:	2064	case EIO_NOP:
1745	req->result = 0;	2065	req->result = 0;
1746	break;	2066	break;
1747		2067
1748	case EIO_CUSTOM:	2068	case EIO_CUSTOM:
1749	((void (*)(eio_req *))req->feed) (req);	2069	req->feed (req);
1750	break;	2070	break;
1751		2071
1752	default:	2072	default:
1753	errno = ENOSYS;	2073	errno = ENOSYS;
1754	req->result = -1;	2074	req->result = -1;
…		…
1803	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)	2123	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
1804	{	2124	{
1805	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;	2125	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
1806	}	2126	}
1807		2127
		2128	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
		2129	{
		2130	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
		2131	}
		2132
1808	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)	2133	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1809	{	2134	{
1810	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;	2135	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1811	}	2136	}
1812		2137
…		…
1907	}	2232	}
1908		2233
1909	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)	2234	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
1910	{	2235	{
1911	return eio__1path (EIO_READLINK, path, pri, cb, data);	2236	return eio__1path (EIO_READLINK, path, pri, cb, data);
		2237	}
		2238
		2239	eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
		2240	{
		2241	return eio__1path (EIO_REALPATH, path, pri, cb, data);
1912	}	2242	}
1913		2243
1914	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)	2244	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
1915	{	2245	{
1916	return eio__1path (EIO_STAT, path, pri, cb, data);	2246	return eio__1path (EIO_STAT, path, pri, cb, data);
…		…
1975	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)	2305	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1976	{	2306	{
1977	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);	2307	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
1978	}	2308	}
1979		2309
1980	eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data)	2310	eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
1981	{	2311	{
1982	REQ (EIO_CUSTOM); req->feed = (void (*)(eio_req *))execute; SEND;	2312	REQ (EIO_CUSTOM); req->feed = execute; SEND;
1983	}	2313	}
1984		2314
1985	#endif	2315	#endif
1986		2316
1987	eio_req *eio_grp (eio_cb cb, void *data)	2317	eio_req *eio_grp (eio_cb cb, void *data)
…		…
1996	#undef SEND	2326	#undef SEND
1997		2327
1998	/*****************************************************************************/	2328	/*****************************************************************************/
1999	/* grp functions */	2329	/* grp functions */
2000		2330
		2331	void
2001	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	2332	eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
2002	{	2333	{
2003	grp->int2 = limit;	2334	grp->int2 = limit;
2004	grp->feed = feed;	2335	grp->feed = feed;
2005		2336
2006	grp_try_feed (grp);	2337	grp_try_feed (grp);
2007	}	2338	}
2008		2339
		2340	void
2009	void eio_grp_limit (eio_req *grp, int limit)	2341	eio_grp_limit (eio_req *grp, int limit)
2010	{	2342	{
2011	grp->int2 = limit;	2343	grp->int2 = limit;
2012		2344
2013	grp_try_feed (grp);	2345	grp_try_feed (grp);
2014	}	2346	}
2015		2347
		2348	void
2016	void eio_grp_add (eio_req *grp, eio_req *req)	2349	eio_grp_add (eio_req *grp, eio_req *req)
2017	{	2350	{
2018	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2351	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
2019		2352
2020	grp->flags |= EIO_FLAG_GROUPADD;	2353	grp->flags |= EIO_FLAG_GROUPADD;
2021		2354
…		…
2032	}	2365	}
2033		2366
2034	/*****************************************************************************/	2367	/*****************************************************************************/
2035	/* misc garbage */	2368	/* misc garbage */
2036		2369
		2370	ssize_t
2037	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)	2371	eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
2038	{	2372	{
2039	etp_worker wrk;	2373	etp_worker wrk;
2040	ssize_t ret;	2374	ssize_t ret;
2041		2375
2042	wrk.dbuf = 0;	2376	wrk.dbuf = 0;

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