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Comparing libeio/eio.c (file contents):
Revision 1.70 by root, Fri Jun 10 06:55:10 2011 UTC vs.
Revision 1.101 by root, Wed Aug 3 15:25:38 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	#if !defined(ENOTSOCK) && defined(WSAENOTSOCK)
		77	# define ENOTSOCK WSAENOTSOCK
		78	#endif
		79
		80	static void eio_destroy (eio_req *req);
		81
69	#ifndef EIO_FINISH	82	#ifndef EIO_FINISH
70	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	83	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
71	#endif	84	#endif
72		85
73	#ifndef EIO_DESTROY	86	#ifndef EIO_DESTROY
…		…
76		89
77	#ifndef EIO_FEED	90	#ifndef EIO_FEED
78	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)	91	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)
79	#endif	92	#endif
80		93
		94	#ifndef EIO_FD_TO_WIN32_HANDLE
		95	# define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		96	#endif
		97	#ifndef EIO_WIN32_HANDLE_TO_FD
		98	# define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		99	#endif
		100
		101	#define EIO_ERRNO(errval,retval) ((errno = errval), retval)
		102
		103	#define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1)
		104
81	#ifdef _WIN32	105	#ifdef _WIN32
82		106
83	/*doh*/	107	#undef PAGESIZE
		108	#define PAGESIZE 4096 /* GetSystemInfo? */
		109
		110	/* TODO: look at how perl does stat (non-sloppy), unlink (ro-files), utime, link */
		111
		112	#ifdef EIO_STRUCT_STATI64
		113	/* look at perl's non-sloppy stat */
		114	#define stat(path,buf) _stati64 (path,buf)
		115	#define fstat(fd,buf) _fstati64 (fd,buf)
		116	#endif
		117	#define lstat(path,buf) stat (path,buf)
		118	#define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
		119	#define mkdir(path,mode) _mkdir (path)
		120	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
		121
		122	#define chmod(path,mode) _chmod (path, mode)
		123	#define dup(fd) _dup (fd)
		124	#define dup2(fd1,fd2) _dup2 (fd1, fd2)
		125
		126	#define fchmod(fd,mode) EIO_ENOSYS ()
		127	#define chown(path,uid,gid) EIO_ENOSYS ()
		128	#define fchown(fd,uid,gid) EIO_ENOSYS ()
		129	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
		130	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
		131	#define mknod(path,mode,dev) EIO_ENOSYS ()
		132	#define sync() EIO_ENOSYS ()
		133	#define readlink(path,buf,s) EIO_ENOSYS ()
		134	#define statvfs(path,buf) EIO_ENOSYS ()
		135	#define fstatvfs(fd,buf) EIO_ENOSYS ()
		136
		137	/* rename() uses MoveFile, which fails to overwrite */
		138	#define rename(old,neu) eio__rename (old, neu)
		139
		140	static int
		141	eio__rename (const char *old, const char *neu)
		142	{
		143	if (MoveFileEx (old, neu, MOVEFILE_REPLACE_EXISTING))
		144	return 0;
		145
		146	/* should steal _dosmaperr */
		147	switch (GetLastError ())
		148	{
		149	case ERROR_FILE_NOT_FOUND:
		150	case ERROR_PATH_NOT_FOUND:
		151	case ERROR_INVALID_DRIVE:
		152	case ERROR_NO_MORE_FILES:
		153	case ERROR_BAD_NETPATH:
		154	case ERROR_BAD_NET_NAME:
		155	case ERROR_BAD_PATHNAME:
		156	case ERROR_FILENAME_EXCED_RANGE:
		157	errno = ENOENT;
		158	break;
		159
		160	default:
		161	errno = EACCES;
		162	break;
		163	}
		164
		165	return -1;
		166	}
		167
		168	/* we could even stat and see if it exists */
		169	static int
		170	symlink (const char *old, const char *neu)
		171	{
		172	#if WINVER >= 0x0600
		173	if (CreateSymbolicLink (neu, old, 1))
		174	return 0;
		175
		176	if (CreateSymbolicLink (neu, old, 0))
		177	return 0;
		178	#endif
		179
		180	return EIO_ERRNO (ENOENT, -1);
		181	}
		182
		183	/* POSIX API only */
		184	#define CreateHardLink(neu,old,flags) 0
		185	#define CreateSymbolicLink(neu,old,flags) 0
		186
		187	struct statvfs
		188	{
		189	int dummy;
		190	};
		191
		192	#define DT_DIR EIO_DT_DIR
		193	#define DT_REG EIO_DT_REG
		194	#define D_NAME(entp) entp.cFileName
		195	#define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG)
		196
84	#else	197	#else
85		198
86	# include <sys/time.h>	199	#include <sys/time.h>
87	# include <sys/select.h>	200	#include <sys/select.h>
		201	#include <sys/statvfs.h>
88	# include <unistd.h>	202	#include <unistd.h>
		203	#include <signal.h>
		204	#include <dirent.h>
		205
		206	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		207	#include <sys/mman.h>
		208	#endif
		209
		210	#define D_NAME(entp) entp->d_name
		211
		212	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
		213	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
		214	#define _DIRENT_HAVE_D_TYPE /* sigh */
		215	#define D_INO(de) (de)->d_fileno
		216	#define D_NAMLEN(de) (de)->d_namlen
		217	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
		218	#define D_INO(de) (de)->d_ino
		219	#endif
		220
		221	#ifdef _D_EXACT_NAMLEN
		222	#undef D_NAMLEN
		223	#define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
		224	#endif
		225
		226	#ifdef _DIRENT_HAVE_D_TYPE
		227	#define D_TYPE(de) (de)->d_type
		228	#endif
		229
		230	#ifndef EIO_STRUCT_DIRENT
		231	#define EIO_STRUCT_DIRENT struct dirent
		232	#endif
		233
		234	#endif
		235
		236	#if HAVE_UTIMES
89	# include <utime.h>	237	# include <utime.h>
90	# include <signal.h>
91	# include <dirent.h>
92
93	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
94	# include <sys/mman.h>
95	#endif
96
97	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
98	# if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
99	# define _DIRENT_HAVE_D_TYPE /* sigh */
100	# define D_INO(de) (de)->d_fileno
101	# define D_NAMLEN(de) (de)->d_namlen
102	# elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
103	# define D_INO(de) (de)->d_ino
104	# endif	238	#endif
105		239
106	#ifdef _D_EXACT_NAMLEN	240	#if HAVE_SYS_SYSCALL_H
107	# undef D_NAMLEN	241	# include <sys/syscall.h>
108	# define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
109	#endif
110
111	# ifdef _DIRENT_HAVE_D_TYPE
112	# define D_TYPE(de) (de)->d_type
113	# endif	242	#endif
114		243
115	# ifndef EIO_STRUCT_DIRENT	244	#if HAVE_SYS_PRCTL_H
116	# define EIO_STRUCT_DIRENT struct dirent	245	# include <sys/prctl.h>
117	# endif
118
119	#endif	246	#endif
120		247
121	#if HAVE_SENDFILE	248	#if HAVE_SENDFILE
122	# if __linux	249	# if __linux
123	# include <sys/sendfile.h>	250	# include <sys/sendfile.h>
…		…
138	#endif	265	#endif
139	#ifndef D_INO	266	#ifndef D_INO
140	# define D_INO(de) 0	267	# define D_INO(de) 0
141	#endif	268	#endif
142	#ifndef D_NAMLEN	269	#ifndef D_NAMLEN
143	# define D_NAMLEN(de) strlen ((de)->d_name)	270	# define D_NAMLEN(entp) strlen (D_NAME (entp))
144	#endif	271	#endif
145		272
146	/* used for struct dirent, AIX doesn't provide it */	273	/* used for struct dirent, AIX doesn't provide it */
147	#ifndef NAME_MAX	274	#ifndef NAME_MAX
148	# define NAME_MAX 4096	275	# define NAME_MAX 4096
…		…
155		282
156	/* buffer size for various temporary buffers */	283	/* buffer size for various temporary buffers */
157	#define EIO_BUFSIZE 65536	284	#define EIO_BUFSIZE 65536
158		285
159	#define dBUF \	286	#define dBUF \
160	char *eio_buf; \
161	ETP_WORKER_LOCK (self); \
162	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	287	char *eio_buf = malloc (EIO_BUFSIZE); \
163	ETP_WORKER_UNLOCK (self); \
164	errno = ENOMEM; \	288	errno = ENOMEM; \
165	if (!eio_buf) \	289	if (!eio_buf) \
166	return -1;	290	return -1
		291
		292	#define FUBd \
		293	free (eio_buf)
167		294
168	#define EIO_TICKS ((1000000 + 1023) >> 10)	295	#define EIO_TICKS ((1000000 + 1023) >> 10)
169
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		296
183	#define ETP_PRI_MIN EIO_PRI_MIN	297	#define ETP_PRI_MIN EIO_PRI_MIN
184	#define ETP_PRI_MAX EIO_PRI_MAX	298	#define ETP_PRI_MAX EIO_PRI_MAX
185		299
186	struct etp_worker;	300	struct etp_worker;
…		…
190	static int eio_finish (eio_req *req);	304	static int eio_finish (eio_req *req);
191	#define ETP_FINISH(req) eio_finish (req)	305	#define ETP_FINISH(req) eio_finish (req)
192	static void eio_execute (struct etp_worker *self, eio_req *req);	306	static void eio_execute (struct etp_worker *self, eio_req *req);
193	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)	307	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
194		308
195	#define ETP_WORKER_CLEAR(req) \
196	if (wrk->dbuf) \
197	{ \
198	free (wrk->dbuf); \
199	wrk->dbuf = 0; \
200	} \
201	\
202	if (wrk->dirp) \
203	{ \
204	closedir (wrk->dirp); \
205	wrk->dirp = 0; \
206	}
207
208	#define ETP_WORKER_COMMON \
209	void *dbuf; \
210	DIR *dirp;
211
212	/*****************************************************************************/	309	/*****************************************************************************/
213		310
214	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)	311	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
215		312
216	/* calculate time difference in ~1/EIO_TICKS of a second */	313	/* calculate time difference in ~1/EIO_TICKS of a second */
		314	ecb_inline int
217	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	315	tvdiff (struct timeval *tv1, struct timeval *tv2)
218	{	316	{
219	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	317	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
220	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);	318	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
221	}	319	}
222		320
…		…
226	static void (*done_poll_cb) (void);	324	static void (*done_poll_cb) (void);
227		325
228	static unsigned int max_poll_time; /* reslock */	326	static unsigned int max_poll_time; /* reslock */
229	static unsigned int max_poll_reqs; /* reslock */	327	static unsigned int max_poll_reqs; /* reslock */
230		328
231	static volatile unsigned int nreqs; /* reqlock */	329	static unsigned int nreqs; /* reqlock */
232	static volatile unsigned int nready; /* reqlock */	330	static unsigned int nready; /* reqlock */
233	static volatile unsigned int npending; /* reqlock */	331	static unsigned int npending; /* reqlock */
234	static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */	332	static unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
235	static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */	333	static unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
236		334
237	static xmutex_t wrklock;	335	static xmutex_t wrklock;
238	static xmutex_t reslock;	336	static xmutex_t reslock;
239	static xmutex_t reqlock;	337	static xmutex_t reqlock;
240	static xcond_t reqwait;	338	static xcond_t reqwait;
…		…
243	/*	341	/*
244	* make our pread/pwrite emulation safe against themselves, but not against	342	* make our pread/pwrite emulation safe against themselves, but not against
245	* normal read/write by using a mutex. slows down execution a lot,	343	* normal read/write by using a mutex. slows down execution a lot,
246	* but that's your problem, not mine.	344	* but that's your problem, not mine.
247	*/	345	*/
248	static xmutex_t preadwritelock = X_MUTEX_INIT;	346	static xmutex_t preadwritelock;
249	#endif	347	#endif
250		348
251	typedef struct etp_worker	349	typedef struct etp_worker
252	{	350	{
253	/* locked by wrklock */	351	/* locked by wrklock */
…		…
256	xthread_t tid;	354	xthread_t tid;
257		355
258	/* locked by reslock, reqlock or wrklock */	356	/* locked by reslock, reqlock or wrklock */
259	ETP_REQ *req; /* currently processed request */	357	ETP_REQ *req; /* currently processed request */
260		358
		359	#ifdef ETP_WORKER_COMMON
261	ETP_WORKER_COMMON	360	ETP_WORKER_COMMON
		361	#endif
262	} etp_worker;	362	} etp_worker;
263		363
264	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */	364	static etp_worker wrk_first; /* NOT etp */
265		365
266	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)	366	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
267	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)	367	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
268		368
269	/* worker threads management */	369	/* worker threads management */
270		370
		371	static void ecb_cold
271	static void etp_worker_clear (etp_worker *wrk)	372	etp_worker_clear (etp_worker *wrk)
272	{	373	{
273	ETP_WORKER_CLEAR (wrk);
274	}	374	}
275		375
		376	static void ecb_cold
276	static void etp_worker_free (etp_worker *wrk)	377	etp_worker_free (etp_worker *wrk)
277	{	378	{
278	wrk->next->prev = wrk->prev;	379	wrk->next->prev = wrk->prev;
279	wrk->prev->next = wrk->next;	380	wrk->prev->next = wrk->next;
280		381
281	free (wrk);	382	free (wrk);
282	}	383	}
283		384
284	static unsigned int etp_nreqs (void)	385	static unsigned int
		386	etp_nreqs (void)
285	{	387	{
286	int retval;	388	int retval;
287	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	389	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
288	retval = nreqs;	390	retval = nreqs;
289	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	391	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
290	return retval;	392	return retval;
291	}	393	}
292		394
293	static unsigned int etp_nready (void)	395	static unsigned int
		396	etp_nready (void)
294	{	397	{
295	unsigned int retval;	398	unsigned int retval;
296		399
297	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	400	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
298	retval = nready;	401	retval = nready;
299	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	402	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
300		403
301	return retval;	404	return retval;
302	}	405	}
303		406
304	static unsigned int etp_npending (void)	407	static unsigned int
		408	etp_npending (void)
305	{	409	{
306	unsigned int retval;	410	unsigned int retval;
307		411
308	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	412	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
309	retval = npending;	413	retval = npending;
310	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	414	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
311		415
312	return retval;	416	return retval;
313	}	417	}
314		418
315	static unsigned int etp_nthreads (void)	419	static unsigned int
		420	etp_nthreads (void)
316	{	421	{
317	unsigned int retval;	422	unsigned int retval;
318		423
319	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	424	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
320	retval = started;	425	retval = started;
…		…
334	} etp_reqq;	439	} etp_reqq;
335		440
336	static etp_reqq req_queue;	441	static etp_reqq req_queue;
337	static etp_reqq res_queue;	442	static etp_reqq res_queue;
338		443
		444	static void ecb_noinline ecb_cold
		445	reqq_init (etp_reqq *q)
		446	{
		447	int pri;
		448
		449	for (pri = 0; pri < ETP_NUM_PRI; ++pri)
		450	q->qs[pri] = q->qe[pri] = 0;
		451
		452	q->size = 0;
		453	}
		454
		455	static int ecb_noinline
339	static int reqq_push (etp_reqq *q, ETP_REQ *req)	456	reqq_push (etp_reqq *q, ETP_REQ *req)
340	{	457	{
341	int pri = req->pri;	458	int pri = req->pri;
342	req->next = 0;	459	req->next = 0;
343		460
344	if (q->qe[pri])	461	if (q->qe[pri])
…		…
350	q->qe[pri] = q->qs[pri] = req;	467	q->qe[pri] = q->qs[pri] = req;
351		468
352	return q->size++;	469	return q->size++;
353	}	470	}
354		471
		472	static ETP_REQ * ecb_noinline
355	static ETP_REQ *reqq_shift (etp_reqq *q)	473	reqq_shift (etp_reqq *q)
356	{	474	{
357	int pri;	475	int pri;
358		476
359	if (!q->size)	477	if (!q->size)
360	return 0;	478	return 0;
…		…
375	}	493	}
376		494
377	abort ();	495	abort ();
378	}	496	}
379		497
380	static void etp_thread_init (void)	498	static int ecb_cold
		499	etp_init (void (*want_poll)(void), void (*done_poll)(void))
381	{	500	{
382	X_MUTEX_CREATE (wrklock);	501	X_MUTEX_CREATE (wrklock);
383	X_MUTEX_CREATE (reslock);	502	X_MUTEX_CREATE (reslock);
384	X_MUTEX_CREATE (reqlock);	503	X_MUTEX_CREATE (reqlock);
385	X_COND_CREATE (reqwait);	504	X_COND_CREATE (reqwait);
386	}
387		505
388	static void etp_atfork_prepare (void)	506	reqq_init (&req_queue);
389	{	507	reqq_init (&res_queue);
390	X_LOCK (wrklock);
391	X_LOCK (reqlock);
392	X_LOCK (reslock);
393	#if !HAVE_PREADWRITE
394	X_LOCK (preadwritelock);
395	#endif
396	}
397		508
398	static void etp_atfork_parent (void)	509	wrk_first.next =
399	{	510	wrk_first.prev = &wrk_first;
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)
409	{
410	ETP_REQ *prv;
411
412	while ((prv = reqq_shift (&req_queue)))
413	ETP_DESTROY (prv);
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		511
429	started = 0;	512	started = 0;
430	idle = 0;	513	idle = 0;
431	nreqs = 0;	514	nreqs = 0;
432	nready = 0;	515	nready = 0;
433	npending = 0;	516	npending = 0;
434		517
435	etp_thread_init ();
436	}
437
438	static void
439	etp_once_init (void)
440	{
441	etp_thread_init ();
442	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
443	}
444
445	static int
446	etp_init (void (*want_poll)(void), void (*done_poll)(void))
447	{
448	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
449
450	pthread_once (&doinit, etp_once_init);
451
452	want_poll_cb = want_poll;	518	want_poll_cb = want_poll;
453	done_poll_cb = done_poll;	519	done_poll_cb = done_poll;
454		520
455	return 0;	521	return 0;
456	}	522	}
457		523
458	X_THREAD_PROC (etp_proc);	524	X_THREAD_PROC (etp_proc);
459		525
		526	static void ecb_cold
460	static void etp_start_thread (void)	527	etp_start_thread (void)
461	{	528	{
462	etp_worker *wrk = calloc (1, sizeof (etp_worker));	529	etp_worker *wrk = calloc (1, sizeof (etp_worker));
463		530
464	/*TODO*/	531	/*TODO*/
465	assert (("unable to allocate worker thread data", wrk));	532	assert (("unable to allocate worker thread data", wrk));
…		…
478	free (wrk);	545	free (wrk);
479		546
480	X_UNLOCK (wrklock);	547	X_UNLOCK (wrklock);
481	}	548	}
482		549
		550	static void
483	static void etp_maybe_start_thread (void)	551	etp_maybe_start_thread (void)
484	{	552	{
485	if (expect_true (etp_nthreads () >= wanted))	553	if (ecb_expect_true (etp_nthreads () >= wanted))
486	return;	554	return;
487		555
488	/* todo: maybe use idle here, but might be less exact */	556	/* todo: maybe use idle here, but might be less exact */
489	if (expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))	557	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
490	return;	558	return;
491		559
492	etp_start_thread ();	560	etp_start_thread ();
493	}	561	}
494		562
		563	static void ecb_cold
495	static void etp_end_thread (void)	564	etp_end_thread (void)
496	{	565	{
497	eio_req *req = calloc (1, sizeof (eio_req));	566	eio_req *req = calloc (1, sizeof (eio_req));
498		567
499	req->type = -1;	568	req->type = -1;
500	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;	569	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
…		…
507	X_LOCK (wrklock);	576	X_LOCK (wrklock);
508	--started;	577	--started;
509	X_UNLOCK (wrklock);	578	X_UNLOCK (wrklock);
510	}	579	}
511		580
512	static int etp_poll (void)	581	static int
		582	etp_poll (void)
513	{	583	{
514	unsigned int maxreqs;	584	unsigned int maxreqs;
515	unsigned int maxtime;	585	unsigned int maxtime;
516	struct timeval tv_start, tv_now;	586	struct timeval tv_start, tv_now;
517		587
…		…
547		617
548	X_LOCK (reqlock);	618	X_LOCK (reqlock);
549	--nreqs;	619	--nreqs;
550	X_UNLOCK (reqlock);	620	X_UNLOCK (reqlock);
551		621
552	if (expect_false (req->type == EIO_GROUP && req->size))	622	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
553	{	623	{
554	req->int1 = 1; /* mark request as delayed */	624	req->int1 = 1; /* mark request as delayed */
555	continue;	625	continue;
556	}	626	}
557	else	627	else
558	{	628	{
559	int res = ETP_FINISH (req);	629	int res = ETP_FINISH (req);
560	if (expect_false (res))	630	if (ecb_expect_false (res))
561	return res;	631	return res;
562	}	632	}
563		633
564	if (expect_false (maxreqs && !--maxreqs))	634	if (ecb_expect_false (maxreqs && !--maxreqs))
565	break;	635	break;
566		636
567	if (maxtime)	637	if (maxtime)
568	{	638	{
569	gettimeofday (&tv_now, 0);	639	gettimeofday (&tv_now, 0);
…		…
575		645
576	errno = EAGAIN;	646	errno = EAGAIN;
577	return -1;	647	return -1;
578	}	648	}
579		649
		650	static void
580	static void etp_cancel (ETP_REQ *req)	651	etp_cancel (ETP_REQ *req)
581	{	652	{
582	X_LOCK (wrklock);	653	req->cancelled = 1;
583	req->flags |= EIO_FLAG_CANCELLED;
584	X_UNLOCK (wrklock);
585		654
586	eio_grp_cancel (req);	655	eio_grp_cancel (req);
587	}	656	}
588		657
		658	static void
589	static void etp_submit (ETP_REQ *req)	659	etp_submit (ETP_REQ *req)
590	{	660	{
591	req->pri -= ETP_PRI_MIN;	661	req->pri -= ETP_PRI_MIN;
592		662
593	if (expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;	663	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;	664	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
595		665
596	if (expect_false (req->type == EIO_GROUP))	666	if (ecb_expect_false (req->type == EIO_GROUP))
597	{	667	{
598	/* I hope this is worth it :/ */	668	/* I hope this is worth it :/ */
599	X_LOCK (reqlock);	669	X_LOCK (reqlock);
600	++nreqs;	670	++nreqs;
601	X_UNLOCK (reqlock);	671	X_UNLOCK (reqlock);
…		…
620		690
621	etp_maybe_start_thread ();	691	etp_maybe_start_thread ();
622	}	692	}
623	}	693	}
624		694
		695	static void ecb_cold
625	static void etp_set_max_poll_time (double nseconds)	696	etp_set_max_poll_time (double nseconds)
626	{	697	{
627	if (WORDACCESS_UNSAFE) X_LOCK (reslock);	698	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
628	max_poll_time = nseconds * EIO_TICKS;	699	max_poll_time = nseconds * EIO_TICKS;
629	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);	700	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
630	}	701	}
631		702
		703	static void ecb_cold
632	static void etp_set_max_poll_reqs (unsigned int maxreqs)	704	etp_set_max_poll_reqs (unsigned int maxreqs)
633	{	705	{
634	if (WORDACCESS_UNSAFE) X_LOCK (reslock);	706	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
635	max_poll_reqs = maxreqs;	707	max_poll_reqs = maxreqs;
636	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);	708	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
637	}	709	}
638		710
		711	static void ecb_cold
639	static void etp_set_max_idle (unsigned int nthreads)	712	etp_set_max_idle (unsigned int nthreads)
640	{	713	{
641	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	714	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
642	max_idle = nthreads;	715	max_idle = nthreads;
643	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	716	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
644	}	717	}
645		718
		719	static void ecb_cold
646	static void etp_set_idle_timeout (unsigned int seconds)	720	etp_set_idle_timeout (unsigned int seconds)
647	{	721	{
648	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	722	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
649	idle_timeout = seconds;	723	idle_timeout = seconds;
650	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	724	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
651	}	725	}
652		726
		727	static void ecb_cold
653	static void etp_set_min_parallel (unsigned int nthreads)	728	etp_set_min_parallel (unsigned int nthreads)
654	{	729	{
655	if (wanted < nthreads)	730	if (wanted < nthreads)
656	wanted = nthreads;	731	wanted = nthreads;
657	}	732	}
658		733
		734	static void ecb_cold
659	static void etp_set_max_parallel (unsigned int nthreads)	735	etp_set_max_parallel (unsigned int nthreads)
660	{	736	{
661	if (wanted > nthreads)	737	if (wanted > nthreads)
662	wanted = nthreads;	738	wanted = nthreads;
663		739
664	while (started > wanted)	740	while (started > wanted)
665	etp_end_thread ();	741	etp_end_thread ();
666	}	742	}
667		743
668	/*****************************************************************************/	744	/*****************************************************************************/
669		745
		746	static void
670	static void grp_try_feed (eio_req *grp)	747	grp_try_feed (eio_req *grp)
671	{	748	{
672	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	749	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
673	{	750	{
674	grp->flags &= ~EIO_FLAG_GROUPADD;	751	grp->flags &= ~EIO_FLAG_GROUPADD;
675		752
…		…
682	break;	759	break;
683	}	760	}
684	}	761	}
685	}	762	}
686		763
		764	static int
687	static int grp_dec (eio_req *grp)	765	grp_dec (eio_req *grp)
688	{	766	{
689	--grp->size;	767	--grp->size;
690		768
691	/* call feeder, if applicable */	769	/* call feeder, if applicable */
692	grp_try_feed (grp);	770	grp_try_feed (grp);
…		…
696	return eio_finish (grp);	774	return eio_finish (grp);
697	else	775	else
698	return 0;	776	return 0;
699	}	777	}
700		778
		779	static void
701	void eio_destroy (eio_req *req)	780	eio_destroy (eio_req *req)
702	{	781	{
703	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);	782	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
704	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);	783	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
705		784
706	EIO_DESTROY (req);	785	EIO_DESTROY (req);
707	}	786	}
708		787
		788	static int
709	static int eio_finish (eio_req *req)	789	eio_finish (eio_req *req)
710	{	790	{
711	int res = EIO_FINISH (req);	791	int res = EIO_FINISH (req);
712		792
713	if (req->grp)	793	if (req->grp)
714	{	794	{
…		…
722	if (grp->grp_first == req)	802	if (grp->grp_first == req)
723	grp->grp_first = req->grp_next;	803	grp->grp_first = req->grp_next;
724		804
725	res2 = grp_dec (grp);	805	res2 = grp_dec (grp);
726		806
727	if (!res && res2)	807	if (!res)
728	res = res2;	808	res = res2;
729	}	809	}
730		810
731	eio_destroy (req);	811	eio_destroy (req);
732		812
733	return res;	813	return res;
734	}	814	}
735		815
		816	void
736	void eio_grp_cancel (eio_req *grp)	817	eio_grp_cancel (eio_req *grp)
737	{	818	{
738	for (grp = grp->grp_first; grp; grp = grp->grp_next)	819	for (grp = grp->grp_first; grp; grp = grp->grp_next)
739	eio_cancel (grp);	820	eio_cancel (grp);
740	}	821	}
741		822
		823	void
742	void eio_cancel (eio_req *req)	824	eio_cancel (eio_req *req)
743	{	825	{
744	etp_cancel (req);	826	etp_cancel (req);
745	}	827	}
746		828
		829	void
747	void eio_submit (eio_req *req)	830	eio_submit (eio_req *req)
748	{	831	{
749	etp_submit (req);	832	etp_submit (req);
750	}	833	}
751		834
752	unsigned int eio_nreqs (void)	835	unsigned int
		836	eio_nreqs (void)
753	{	837	{
754	return etp_nreqs ();	838	return etp_nreqs ();
755	}	839	}
756		840
757	unsigned int eio_nready (void)	841	unsigned int
		842	eio_nready (void)
758	{	843	{
759	return etp_nready ();	844	return etp_nready ();
760	}	845	}
761		846
762	unsigned int eio_npending (void)	847	unsigned int
		848	eio_npending (void)
763	{	849	{
764	return etp_npending ();	850	return etp_npending ();
765	}	851	}
766		852
767	unsigned int eio_nthreads (void)	853	unsigned int ecb_cold
		854	eio_nthreads (void)
768	{	855	{
769	return etp_nthreads ();	856	return etp_nthreads ();
770	}	857	}
771		858
		859	void ecb_cold
772	void eio_set_max_poll_time (double nseconds)	860	eio_set_max_poll_time (double nseconds)
773	{	861	{
774	etp_set_max_poll_time (nseconds);	862	etp_set_max_poll_time (nseconds);
775	}	863	}
776		864
		865	void ecb_cold
777	void eio_set_max_poll_reqs (unsigned int maxreqs)	866	eio_set_max_poll_reqs (unsigned int maxreqs)
778	{	867	{
779	etp_set_max_poll_reqs (maxreqs);	868	etp_set_max_poll_reqs (maxreqs);
780	}	869	}
781		870
		871	void ecb_cold
782	void eio_set_max_idle (unsigned int nthreads)	872	eio_set_max_idle (unsigned int nthreads)
783	{	873	{
784	etp_set_max_idle (nthreads);	874	etp_set_max_idle (nthreads);
785	}	875	}
786		876
		877	void ecb_cold
787	void eio_set_idle_timeout (unsigned int seconds)	878	eio_set_idle_timeout (unsigned int seconds)
788	{	879	{
789	etp_set_idle_timeout (seconds);	880	etp_set_idle_timeout (seconds);
790	}	881	}
791		882
		883	void ecb_cold
792	void eio_set_min_parallel (unsigned int nthreads)	884	eio_set_min_parallel (unsigned int nthreads)
793	{	885	{
794	etp_set_min_parallel (nthreads);	886	etp_set_min_parallel (nthreads);
795	}	887	}
796		888
		889	void ecb_cold
797	void eio_set_max_parallel (unsigned int nthreads)	890	eio_set_max_parallel (unsigned int nthreads)
798	{	891	{
799	etp_set_max_parallel (nthreads);	892	etp_set_max_parallel (nthreads);
800	}	893	}
801		894
802	int eio_poll (void)	895	int eio_poll (void)
…		…
811	# undef pread	904	# undef pread
812	# undef pwrite	905	# undef pwrite
813	# define pread eio__pread	906	# define pread eio__pread
814	# define pwrite eio__pwrite	907	# define pwrite eio__pwrite
815		908
816	static ssize_t	909	static eio_ssize_t
817	eio__pread (int fd, void *buf, size_t count, off_t offset)	910	eio__pread (int fd, void *buf, size_t count, off_t offset)
818	{	911	{
819	ssize_t res;	912	eio_ssize_t res;
820	off_t ooffset;	913	off_t ooffset;
821		914
822	X_LOCK (preadwritelock);	915	X_LOCK (preadwritelock);
823	ooffset = lseek (fd, 0, SEEK_CUR);	916	ooffset = lseek (fd, 0, SEEK_CUR);
824	lseek (fd, offset, SEEK_SET);	917	lseek (fd, offset, SEEK_SET);
…		…
827	X_UNLOCK (preadwritelock);	920	X_UNLOCK (preadwritelock);
828		921
829	return res;	922	return res;
830	}	923	}
831		924
832	static ssize_t	925	static eio_ssize_t
833	eio__pwrite (int fd, void *buf, size_t count, off_t offset)	926	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
834	{	927	{
835	ssize_t res;	928	eio_ssize_t res;
836	off_t ooffset;	929	off_t ooffset;
837		930
838	X_LOCK (preadwritelock);	931	X_LOCK (preadwritelock);
839	ooffset = lseek (fd, 0, SEEK_CUR);	932	ooffset = lseek (fd, 0, SEEK_CUR);
840	lseek (fd, offset, SEEK_SET);	933	lseek (fd, offset, SEEK_SET);
…		…
872	#ifndef HAVE_FUTIMES	965	#ifndef HAVE_FUTIMES
873		966
874	# undef futimes	967	# undef futimes
875	# define futimes(fd,times) eio__futimes (fd, times)	968	# define futimes(fd,times) eio__futimes (fd, times)
876		969
		970	static int
877	static int eio__futimes (int fd, const struct timeval tv[2])	971	eio__futimes (int fd, const struct timeval tv[2])
878	{	972	{
879	errno = ENOSYS;	973	errno = ENOSYS;
880	return -1;	974	return -1;
881	}	975	}
882		976
…		…
885	#if !HAVE_FDATASYNC	979	#if !HAVE_FDATASYNC
886	# undef fdatasync	980	# undef fdatasync
887	# define fdatasync(fd) fsync (fd)	981	# define fdatasync(fd) fsync (fd)
888	#endif	982	#endif
889		983
		984	static int
		985	eio__syncfs (int fd)
		986	{
		987	int res;
		988
		989	#if HAVE_SYS_SYNCFS
		990	res = (int)syscall (__NR_syncfs, (int)(fd));
		991	#else
		992	res = -1;
		993	errno = ENOSYS;
		994	#endif
		995
		996	if (res < 0 && errno == ENOSYS && fd >= 0)
		997	sync ();
		998
		999	return res;
		1000	}
		1001
890	/* sync_file_range always needs emulation */	1002	/* sync_file_range always needs emulation */
891	int	1003	static int
892	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)	1004	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
893	{	1005	{
894	#if HAVE_SYNC_FILE_RANGE	1006	#if HAVE_SYNC_FILE_RANGE
895	int res;	1007	int res;
896		1008
…		…
913	/* even though we could play tricks with the flags, it's better to always	1025	/* 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 */	1026	* call fdatasync, as that matches the expectation of its users best */
915	return fdatasync (fd);	1027	return fdatasync (fd);
916	}	1028	}
917		1029
		1030	static int
		1031	eio__fallocate (int fd, int mode, off_t offset, size_t len)
		1032	{
		1033	#if HAVE_FALLOCATE
		1034	return fallocate (fd, mode, offset, len);
		1035	#else
		1036	errno = ENOSYS;
		1037	return -1;
		1038	#endif
		1039	}
		1040
918	#if !HAVE_READAHEAD	1041	#if !HAVE_READAHEAD
919	# undef readahead	1042	# undef readahead
920	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)	1043	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
921		1044
922	static ssize_t	1045	static eio_ssize_t
923	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)	1046	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
924	{	1047	{
925	size_t todo = count;	1048	size_t todo = count;
926	dBUF;	1049	dBUF;
927		1050
…		…
932	pread (fd, eio_buf, len, offset);	1055	pread (fd, eio_buf, len, offset);
933	offset += len;	1056	offset += len;
934	todo -= len;	1057	todo -= len;
935	}	1058	}
936		1059
		1060	FUBd;
		1061
937	errno = 0;	1062	errno = 0;
938	return count;	1063	return count;
939	}	1064	}
940		1065
941	#endif	1066	#endif
942		1067
943	/* sendfile always needs emulation */	1068	/* sendfile always needs emulation */
944	static ssize_t	1069	static eio_ssize_t
945	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)	1070	eio__sendfile (int ofd, int ifd, off_t offset, size_t count)
946	{	1071	{
947	ssize_t written = 0;	1072	eio_ssize_t written = 0;
948	ssize_t res;	1073	eio_ssize_t res;
949		1074
950	if (!count)	1075	if (!count)
951	return 0;	1076	return 0;
952		1077
953	for (;;)	1078	for (;;)
954	{	1079	{
		1080	#ifdef __APPLE__
		1081	# undef HAVE_SENDFILE /* broken, as everything on os x */
		1082	#endif
955	#if HAVE_SENDFILE	1083	#if HAVE_SENDFILE
956	# if __linux	1084	# if __linux
957	off_t soffset = offset;	1085	off_t soffset = offset;
958	res = sendfile (ofd, ifd, &soffset, count);	1086	res = sendfile (ofd, ifd, &soffset, count);
959		1087
…		…
1002	if (res < 0 && sbytes)	1130	if (res < 0 && sbytes)
1003	res = sbytes;	1131	res = sbytes;
1004		1132
1005	# endif	1133	# endif
1006		1134
1007	#elif defined (_WIN32)	1135	#elif defined (_WIN32) && 0
1008	/* does not work, just for documentation of what would need to be done */	1136	/* does not work, just for documentation of what would need to be done */
1009	/* actually, cannot be done like this, as TransmitFile changes the file offset, */	1137	/* actually, cannot be done like this, as TransmitFile changes the file offset, */
1010	/* libeio guarantees that the file offset does not change, and windows */	1138	/* libeio guarantees that the file offset does not change, and windows */
1011	/* has no way to get an independent handle to the same file description */	1139	/* has no way to get an independent handle to the same file description */
1012	HANDLE h = TO_SOCKET (ifd);	1140	HANDLE h = TO_SOCKET (ifd);
…		…
1045	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	1173	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
1046	/* BSDs */	1174	/* BSDs */
1047	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */	1175	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
1048	|| errno == ENOTSUP	1176	|| errno == ENOTSUP
1049	#endif	1177	#endif
		1178	#ifdef EOPNOTSUPP /* windows */
1050	|| errno == EOPNOTSUPP /* BSDs */	1179	|| errno == EOPNOTSUPP /* BSDs */
		1180	#endif
1051	#if __solaris	1181	#if __solaris
1052	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	1182	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
1053	#endif	1183	#endif
1054	)	1184	)
1055	)	1185	)
…		…
1059		1189
1060	res = 0;	1190	res = 0;
1061		1191
1062	while (count)	1192	while (count)
1063	{	1193	{
1064	ssize_t cnt;	1194	eio_ssize_t cnt;
1065		1195
1066	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);	1196	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);
1067		1197
1068	if (cnt <= 0)	1198	if (cnt <= 0)
1069	{	1199	{
…		…
1081		1211
1082	offset += cnt;	1212	offset += cnt;
1083	res += cnt;	1213	res += cnt;
1084	count -= cnt;	1214	count -= cnt;
1085	}	1215	}
		1216
		1217	FUBd;
1086	}	1218	}
1087		1219
1088	return res;	1220	return res;
		1221	}
		1222
		1223	#ifdef PAGESIZE
		1224	# define eio_pagesize() PAGESIZE
		1225	#else
		1226	static intptr_t
		1227	eio_pagesize (void)
		1228	{
		1229	static intptr_t page;
		1230
		1231	if (!page)
		1232	page = sysconf (_SC_PAGESIZE);
		1233
		1234	return page;
		1235	}
		1236	#endif
		1237
		1238	static void
		1239	eio_page_align (void **addr, size_t *length)
		1240	{
		1241	intptr_t mask = eio_pagesize () - 1;
		1242
		1243	/* round down addr */
		1244	intptr_t adj = mask & (intptr_t)*addr;
		1245
		1246	*addr = (void *)((intptr_t)*addr - adj);
		1247	*length += adj;
		1248
		1249	/* round up length */
		1250	*length = (*length + mask) & ~mask;
		1251	}
		1252
		1253	#if !_POSIX_MEMLOCK
		1254	# define eio__mlockall(a) EIO_ENOSYS ()
		1255	#else
		1256
		1257	static int
		1258	eio__mlockall (int flags)
		1259	{
		1260	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1261	extern int mallopt (int, int);
		1262	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1263	#endif
		1264
		1265	if (EIO_MCL_CURRENT != MCL_CURRENT
		1266	|| EIO_MCL_FUTURE != MCL_FUTURE)
		1267	{
		1268	flags = 0
		1269	| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
		1270	| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
		1271	}
		1272
		1273	return mlockall (flags);
		1274	}
		1275	#endif
		1276
		1277	#if !_POSIX_MEMLOCK_RANGE
		1278	# define eio__mlock(a,b) EIO_ENOSYS ()
		1279	#else
		1280
		1281	static int
		1282	eio__mlock (void *addr, size_t length)
		1283	{
		1284	eio_page_align (&addr, &length);
		1285
		1286	return mlock (addr, length);
		1287	}
		1288
		1289	#endif
		1290
		1291	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1292	# define eio__msync(a,b,c) EIO_ENOSYS ()
		1293	#else
		1294
		1295	static int
		1296	eio__msync (void *mem, size_t len, int flags)
		1297	{
		1298	eio_page_align (&mem, &len);
		1299
		1300	if (EIO_MS_ASYNC != MS_SYNC
		1301	|| EIO_MS_INVALIDATE != MS_INVALIDATE
		1302	|| EIO_MS_SYNC != MS_SYNC)
		1303	{
		1304	flags = 0
		1305	| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
		1306	| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
		1307	| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
		1308	}
		1309
		1310	return msync (mem, len, flags);
		1311	}
		1312
		1313	#endif
		1314
		1315	static int
		1316	eio__mtouch (eio_req *req)
		1317	{
		1318	void *mem = req->ptr2;
		1319	size_t len = req->size;
		1320	int flags = req->int1;
		1321
		1322	eio_page_align (&mem, &len);
		1323
		1324	{
		1325	intptr_t addr = (intptr_t)mem;
		1326	intptr_t end = addr + len;
		1327	intptr_t page = eio_pagesize ();
		1328
		1329	if (addr < end)
		1330	if (flags & EIO_MT_MODIFY) /* modify */
		1331	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1332	else
		1333	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1334	}
		1335
		1336	return 0;
		1337	}
		1338
		1339	/*****************************************************************************/
		1340	/* requests implemented outside eio_execute, because they are so large */
		1341
		1342	static void
		1343	eio__realpath (eio_req *req, etp_worker *self)
		1344	{
		1345	char *rel = req->ptr1;
		1346	char *res;
		1347	char *tmp1, *tmp2;
		1348	#if SYMLOOP_MAX > 32
		1349	int symlinks = SYMLOOP_MAX;
		1350	#else
		1351	int symlinks = 32;
		1352	#endif
		1353
		1354	req->result = -1;
		1355
		1356	errno = EINVAL;
		1357	if (!rel)
		1358	return;
		1359
		1360	errno = ENOENT;
		1361	if (!*rel)
		1362	return;
		1363
		1364	if (!req->ptr2)
		1365	{
		1366	X_LOCK (wrklock);
		1367	req->flags |= EIO_FLAG_PTR2_FREE;
		1368	X_UNLOCK (wrklock);
		1369	req->ptr2 = malloc (PATH_MAX * 3);
		1370
		1371	errno = ENOMEM;
		1372	if (!req->ptr2)
		1373	return;
		1374	}
		1375
		1376	res = req->ptr2;
		1377	tmp1 = res + PATH_MAX;
		1378	tmp2 = tmp1 + PATH_MAX;
		1379
		1380	#if 0 /* disabled, the musl way to do things is just too racy */
		1381	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
		1382	/* on linux we may be able to ask the kernel */
		1383	{
		1384	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
		1385
		1386	if (fd >= 0)
		1387	{
		1388	sprintf (tmp1, "/proc/self/fd/%d", fd);
		1389	req->result = readlink (tmp1, res, PATH_MAX);
		1390	close (fd);
		1391
		1392	/* here we should probably stat the open file and the disk file, to make sure they still match */
		1393
		1394	if (req->result > 0)
		1395	goto done;
		1396	}
		1397	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
		1398	return;
		1399	}
		1400	#endif
		1401	#endif
		1402
		1403	if (*rel != '/')
		1404	{
		1405	if (!getcwd (res, PATH_MAX))
		1406	return;
		1407
		1408	if (res [1]) /* only use if not / */
		1409	res += strlen (res);
		1410	}
		1411
		1412	while (*rel)
		1413	{
		1414	eio_ssize_t len, linklen;
		1415	char *beg = rel;
		1416
		1417	while (*rel && *rel != '/')
		1418	++rel;
		1419
		1420	len = rel - beg;
		1421
		1422	if (!len) /* skip slashes */
		1423	{
		1424	++rel;
		1425	continue;
		1426	}
		1427
		1428	if (beg [0] == '.')
		1429	{
		1430	if (len == 1)
		1431	continue; /* . - nop */
		1432
		1433	if (beg [1] == '.' && len == 2)
		1434	{
		1435	/* .. - back up one component, if possible */
		1436
		1437	while (res != req->ptr2)
		1438	if (*--res == '/')
		1439	break;
		1440
		1441	continue;
		1442	}
		1443	}
		1444
		1445	errno = ENAMETOOLONG;
		1446	if (res + 1 + len + 1 >= tmp1)
		1447	return;
		1448
		1449	/* copy one component */
		1450	*res = '/';
		1451	memcpy (res + 1, beg, len);
		1452
		1453	/* zero-terminate, for readlink */
		1454	res [len + 1] = 0;
		1455
		1456	/* now check if it's a symlink */
		1457	linklen = readlink (req->ptr2, tmp1, PATH_MAX);
		1458
		1459	if (linklen < 0)
		1460	{
		1461	if (errno != EINVAL)
		1462	return;
		1463
		1464	/* it's a normal directory. hopefully */
		1465	res += len + 1;
		1466	}
		1467	else
		1468	{
		1469	/* yay, it was a symlink - build new path in tmp2 */
		1470	int rellen = strlen (rel);
		1471
		1472	errno = ENAMETOOLONG;
		1473	if (linklen + 1 + rellen >= PATH_MAX)
		1474	return;
		1475
		1476	errno = ELOOP;
		1477	if (!--symlinks)
		1478	return;
		1479
		1480	if (*tmp1 == '/')
		1481	res = req->ptr2; /* symlink resolves to an absolute path */
		1482
		1483	/* we need to be careful, as rel might point into tmp2 already */
		1484	memmove (tmp2 + linklen + 1, rel, rellen + 1);
		1485	tmp2 [linklen] = '/';
		1486	memcpy (tmp2, tmp1, linklen);
		1487
		1488	rel = tmp2;
		1489	}
		1490	}
		1491
		1492	/* special case for the lone root path */
		1493	if (res == req->ptr2)
		1494	*res++ = '/';
		1495
		1496	req->result = res - (char *)req->ptr2;
		1497
		1498	done:
		1499	req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */
1089	}	1500	}
1090		1501
1091	static signed char	1502	static signed char
1092	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)	1503	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
1093	{	1504	{
…		…
1101		1512
1102	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */	1513	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
1103	#define EIO_SORT_FAST 60 /* when to only use insertion sort */	1514	#define EIO_SORT_FAST 60 /* when to only use insertion sort */
1104		1515
1105	static void	1516	static void
1106	eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)	1517	eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
1107	{	1518	{
1108	unsigned char bits [9 + sizeof (ino_t) * 8];	1519	unsigned char bits [9 + sizeof (eio_ino_t) * 8];
1109	unsigned char *bit = bits;	1520	unsigned char *bit = bits;
1110		1521
1111	assert (CHAR_BIT == 8);	1522	assert (CHAR_BIT == 8);
1112	assert (sizeof (eio_dirent) * 8 < 256);	1523	assert (sizeof (eio_dirent) * 8 < 256);
1113	assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */	1524	assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
…		…
1115		1526
1116	if (size <= EIO_SORT_FAST)	1527	if (size <= EIO_SORT_FAST)
1117	return;	1528	return;
1118		1529
1119	/* first prepare an array of bits to test in our radix sort */	1530	/* first prepare an array of bits to test in our radix sort */
1120	/* try to take endianness into account, as well as differences in ino_t sizes */	1531	/* try to take endianness into account, as well as differences in eio_ino_t sizes */
1121	/* inode_bits must contain all inodes ORed together */	1532	/* inode_bits must contain all inodes ORed together */
1122	/* which is used to skip bits that are 0 everywhere, which is very common */	1533	/* which is used to skip bits that are 0 everywhere, which is very common */
1123	{	1534	{
1124	ino_t endianness;	1535	eio_ino_t endianness;
1125	int i, j;	1536	int i, j;
1126		1537
1127	/* we store the byte offset of byte n into byte n of "endianness" */	1538	/* we store the byte offset of byte n into byte n of "endianness" */
1128	for (i = 0; i < sizeof (ino_t); ++i)	1539	for (i = 0; i < sizeof (eio_ino_t); ++i)
1129	((unsigned char *)&endianness)[i] = i;	1540	((unsigned char *)&endianness)[i] = i;
1130		1541
1131	*bit++ = 0;	1542	*bit++ = 0;
1132		1543
1133	for (i = 0; i < sizeof (ino_t); ++i)	1544	for (i = 0; i < sizeof (eio_ino_t); ++i)
1134	{	1545	{
1135	/* shifting off the byte offsets out of "endianness" */	1546	/* shifting off the byte offsets out of "endianness" */
1136	int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;	1547	int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
1137	endianness >>= 8;	1548	endianness >>= 8;
1138		1549
1139	for (j = 0; j < 8; ++j)	1550	for (j = 0; j < 8; ++j)
1140	if (inode_bits & (((ino_t)1) << (i * 8 + j)))	1551	if (inode_bits & (((eio_ino_t)1) << (i * 8 + j)))
1141	*bit++ = offs + j;	1552	*bit++ = offs + j;
1142	}	1553	}
1143		1554
1144	for (j = 0; j < 8; ++j)	1555	for (j = 0; j < 8; ++j)
1145	if (score_bits & (1 << j))	1556	if (score_bits & (1 << j))
1146	*bit++ = offsetof (eio_dirent, score) * 8 + j;	1557	*bit++ = offsetof (eio_dirent, score) * 8 + j;
1147	}	1558	}
1148		1559
1149	/* now actually do the sorting (a variant of MSD radix sort) */	1560	/* now actually do the sorting (a variant of MSD radix sort) */
1150	{	1561	{
1151	eio_dirent *base_stk [9 + sizeof (ino_t) * 8], *base;	1562	eio_dirent *base_stk [9 + sizeof (eio_ino_t) * 8], *base;
1152	eio_dirent *end_stk [9 + sizeof (ino_t) * 8], *end;	1563	eio_dirent *end_stk [9 + sizeof (eio_ino_t) * 8], *end;
1153	unsigned char *bit_stk [9 + sizeof (ino_t) * 8];	1564	unsigned char *bit_stk [9 + sizeof (eio_ino_t) * 8];
1154	int stk_idx = 0;	1565	int stk_idx = 0;
1155		1566
1156	base_stk [stk_idx] = dents;	1567	base_stk [stk_idx] = dents;
1157	end_stk [stk_idx] = dents + size;	1568	end_stk [stk_idx] = dents + size;
1158	bit_stk [stk_idx] = bit - 1;	1569	bit_stk [stk_idx] = bit - 1;
…		…
1237	}	1648	}
1238	}	1649	}
1239	}	1650	}
1240		1651
1241	static void	1652	static void
1242	eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, ino_t inode_bits)	1653	eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
1243	{	1654	{
1244	if (size <= 1)	1655	if (size <= 1)
1245	return; /* our insertion sort relies on size > 0 */	1656	return; /* our insertion sort relies on size > 0 */
1246		1657
1247	/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */	1658	/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
…		…
1255		1666
1256	/* read a full directory */	1667	/* read a full directory */
1257	static void	1668	static void
1258	eio__scandir (eio_req *req, etp_worker *self)	1669	eio__scandir (eio_req *req, etp_worker *self)
1259	{	1670	{
1260	DIR *dirp;
1261	EIO_STRUCT_DIRENT *entp;
1262	char *name, *names;	1671	char *name, *names;
1263	int namesalloc = 4096;	1672	int namesalloc = 4096 - sizeof (void *) * 4;
1264	int namesoffs = 0;	1673	int namesoffs = 0;
1265	int flags = req->int1;	1674	int flags = req->int1;
1266	eio_dirent *dents = 0;	1675	eio_dirent *dents = 0;
1267	int dentalloc = 128;	1676	int dentalloc = 128;
1268	int dentoffs = 0;	1677	int dentoffs = 0;
1269	ino_t inode_bits = 0;	1678	eio_ino_t inode_bits = 0;
		1679	#ifdef _WIN32
		1680	HANDLE dirp;
		1681	WIN32_FIND_DATA entp;
		1682	#else
		1683	DIR *dirp;
		1684	EIO_STRUCT_DIRENT *entp;
		1685	#endif
1270		1686
1271	req->result = -1;	1687	req->result = -1;
1272		1688
1273	if (!(flags & EIO_READDIR_DENTS))	1689	if (!(flags & EIO_READDIR_DENTS))
1274	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);	1690	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
1275		1691
1276	X_LOCK (wrklock);	1692	#ifdef _WIN32
1277	/* the corresponding closedir is in ETP_WORKER_CLEAR */	1693	{
		1694	int len = strlen ((const char *)req->ptr1);
		1695	char *path = malloc (MAX_PATH);
		1696	const char *fmt;
		1697
		1698	if (!len)
		1699	fmt = "./*";
		1700	else if (((const char *)req->ptr1)[len - 1] == '/' || ((const char *)req->ptr1)[len - 1] == '\\')
		1701	fmt = "%s*";
		1702	else
		1703	fmt = "%s/*";
		1704
		1705	_snprintf (path, MAX_PATH, fmt, (const char *)req->ptr1);
		1706	dirp = FindFirstFile (path, &entp);
		1707	free (path);
		1708
		1709	if (dirp == INVALID_HANDLE_VALUE)
		1710	{
		1711	dirp = 0;
		1712
		1713	/* should steal _dosmaperr */
		1714	switch (GetLastError ())
		1715	{
		1716	case ERROR_FILE_NOT_FOUND:
		1717	req->result = 0;
		1718	break;
		1719
		1720	case ERROR_INVALID_NAME:
		1721	case ERROR_PATH_NOT_FOUND:
		1722	case ERROR_NO_MORE_FILES:
		1723	errno = ENOENT;
		1724	break;
		1725
		1726	case ERROR_NOT_ENOUGH_MEMORY:
		1727	errno = ENOMEM;
		1728	break;
		1729
		1730	default:
		1731	errno = EINVAL;
		1732	break;
		1733	}
		1734	}
		1735	}
		1736	#else
1278	self->dirp = dirp = opendir (req->ptr1);	1737	dirp = opendir (req->ptr1);
		1738	#endif
		1739
		1740	if (req->flags & EIO_FLAG_PTR1_FREE)
		1741	free (req->ptr1);
1279		1742
1280	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;	1743	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
1281	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;	1744	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
1282	req->ptr2 = names = malloc (namesalloc);	1745	req->ptr2 = names = malloc (namesalloc);
1283	X_UNLOCK (wrklock);
1284		1746
1285	if (dirp && names && (!flags || dents))	1747	if (dirp && names && (!flags || dents))
1286	for (;;)	1748	for (;;)
1287	{	1749	{
		1750	int done;
		1751
		1752	#ifdef _WIN32
		1753	done = !dirp;
		1754	#else
1288	errno = 0;	1755	errno = 0;
1289	entp = readdir (dirp);	1756	entp = readdir (dirp);
		1757	done = !entp;
		1758	#endif
1290		1759
1291	if (!entp)	1760	if (done)
1292	{	1761	{
		1762	#ifndef _WIN32
		1763	int old_errno = errno;
		1764	closedir (dirp);
		1765	errno = old_errno;
		1766
1293	if (errno)	1767	if (errno)
1294	break;	1768	break;
		1769	#endif
1295		1770
1296	/* sort etc. */	1771	/* sort etc. */
1297	req->int1 = flags;	1772	req->int1 = flags;
1298	req->result = dentoffs;	1773	req->result = dentoffs;
1299		1774
…		…
1328		1803
1329	break;	1804	break;
1330	}	1805	}
1331		1806
1332	/* now add the entry to our list(s) */	1807	/* now add the entry to our list(s) */
1333	name = entp->d_name;	1808	name = D_NAME (entp);
1334		1809
1335	/* skip . and .. entries */	1810	/* skip . and .. entries */
1336	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1811	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1337	{	1812	{
1338	int len = D_NAMLEN (entp) + 1;	1813	int len = D_NAMLEN (entp) + 1;
1339		1814
1340	while (expect_false (namesoffs + len > namesalloc))	1815	while (ecb_expect_false (namesoffs + len > namesalloc))
1341	{	1816	{
1342	namesalloc *= 2;	1817	namesalloc *= 2;
1343	X_LOCK (wrklock);
1344	req->ptr2 = names = realloc (names, namesalloc);	1818	req->ptr2 = names = realloc (names, namesalloc);
1345	X_UNLOCK (wrklock);
1346		1819
1347	if (!names)	1820	if (!names)
1348	break;	1821	break;
1349	}	1822	}
1350		1823
…		…
1352		1825
1353	if (dents)	1826	if (dents)
1354	{	1827	{
1355	struct eio_dirent *ent;	1828	struct eio_dirent *ent;
1356		1829
1357	if (expect_false (dentoffs == dentalloc))	1830	if (ecb_expect_false (dentoffs == dentalloc))
1358	{	1831	{
1359	dentalloc *= 2;	1832	dentalloc *= 2;
1360	X_LOCK (wrklock);
1361	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));	1833	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
1362	X_UNLOCK (wrklock);
1363		1834
1364	if (!dents)	1835	if (!dents)
1365	break;	1836	break;
1366	}	1837	}
1367		1838
…		…
1447	if (EIO_CANCELLED (req))	1918	if (EIO_CANCELLED (req))
1448	{	1919	{
1449	errno = ECANCELED;	1920	errno = ECANCELED;
1450	break;	1921	break;
1451	}	1922	}
		1923
		1924	#ifdef _WIN32
		1925	if (!FindNextFile (dirp, &entp))
		1926	{
		1927	FindClose (dirp);
		1928	dirp = 0;
		1929	}
		1930	#endif
1452	}	1931	}
1453	}
1454
1455	#ifdef PAGESIZE
1456	# define eio_pagesize() PAGESIZE
1457	#else
1458	static intptr_t
1459	eio_pagesize (void)
1460	{
1461	static intptr_t page;
1462
1463	if (!page)
1464	page = sysconf (_SC_PAGESIZE);
1465
1466	return page;
1467	}
1468	#endif
1469
1470	static void
1471	eio_page_align (void **addr, size_t *length)
1472	{
1473	intptr_t mask = eio_pagesize () - 1;
1474
1475	/* round down addr */
1476	intptr_t adj = mask & (intptr_t)*addr;
1477
1478	*addr = (void *)((intptr_t)*addr - adj);
1479	*length += adj;
1480
1481	/* round up length */
1482	*length = (*length + mask) & ~mask;
1483	}
1484
1485	#if !_POSIX_MEMLOCK
1486	# define eio__mlockall(a) ((errno = ENOSYS), -1)
1487	#else
1488
1489	static int
1490	eio__mlockall (int flags)
1491	{
1492	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
1493	extern int mallopt (int, int);
1494	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
1495	#endif
1496
1497	if (EIO_MCL_CURRENT != MCL_CURRENT
1498	|| EIO_MCL_FUTURE != MCL_FUTURE)
1499	{
1500	flags = 0
1501	| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
1502	| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
1503	}
1504
1505	return mlockall (flags);
1506	}
1507	#endif
1508
1509	#if !_POSIX_MEMLOCK_RANGE
1510	# define eio__mlock(a,b) ((errno = ENOSYS), -1)
1511	#else
1512
1513	static int
1514	eio__mlock (void *addr, size_t length)
1515	{
1516	eio_page_align (&addr, &length);
1517
1518	return mlock (addr, length);
1519	}
1520
1521	#endif
1522
1523	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
1524	# define eio__msync(a,b,c) ((errno = ENOSYS), -1)
1525	#else
1526
1527	int
1528	eio__msync (void *mem, size_t len, int flags)
1529	{
1530	eio_page_align (&mem, &len);
1531
1532	if (EIO_MS_ASYNC != MS_SYNC
1533	|| EIO_MS_INVALIDATE != MS_INVALIDATE
1534	|| EIO_MS_SYNC != MS_SYNC)
1535	{
1536	flags = 0
1537	| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
1538	| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
1539	| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
1540	}
1541
1542	return msync (mem, len, flags);
1543	}
1544
1545	#endif
1546
1547	int
1548	eio__mtouch (eio_req *req)
1549	{
1550	void *mem = req->ptr2;
1551	size_t len = req->size;
1552	int flags = req->int1;
1553
1554	eio_page_align (&mem, &len);
1555
1556	{
1557	intptr_t addr = (intptr_t)mem;
1558	intptr_t end = addr + len;
1559	intptr_t page = eio_pagesize ();
1560
1561	if (addr < end)
1562	if (flags & EIO_MT_MODIFY) /* modify */
1563	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
1564	else
1565	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
1566	}
1567
1568	return 0;
1569	}	1932	}
1570		1933
1571	/*****************************************************************************/	1934	/*****************************************************************************/
1572		1935
1573	#define ALLOC(len) \	1936	#define ALLOC(len) \
…		…
1589	{	1952	{
1590	ETP_REQ *req;	1953	ETP_REQ *req;
1591	struct timespec ts;	1954	struct timespec ts;
1592	etp_worker *self = (etp_worker *)thr_arg;	1955	etp_worker *self = (etp_worker *)thr_arg;
1593		1956
		1957	#if HAVE_PRCTL_SET_NAME
		1958	prctl (PR_SET_NAME, (unsigned long)"eio_thread", 0, 0, 0);
		1959	#endif
		1960
1594	/* try to distribute timeouts somewhat randomly */	1961	/* try to distribute timeouts somewhat evenly */
1595	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1962	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
1596		1963
1597	for (;;)	1964	for (;;)
1598	{	1965	{
		1966	ts.tv_sec = 0;
		1967
1599	X_LOCK (reqlock);	1968	X_LOCK (reqlock);
1600		1969
1601	for (;;)	1970	for (;;)
1602	{	1971	{
1603	self->req = req = reqq_shift (&req_queue);	1972	self->req = req = reqq_shift (&req_queue);
1604		1973
1605	if (req)	1974	if (req)
1606	break;	1975	break;
1607		1976
		1977	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
		1978	{
		1979	X_UNLOCK (reqlock);
		1980	X_LOCK (wrklock);
		1981	--started;
		1982	X_UNLOCK (wrklock);
		1983	goto quit;
		1984	}
		1985
1608	++idle;	1986	++idle;
1609		1987
1610	ts.tv_sec = time (0) + idle_timeout;	1988	if (idle <= max_idle)
1611	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1989	/* we are allowed to idle, so do so without any timeout */
		1990	X_COND_WAIT (reqwait, reqlock);
		1991	else
1612	{	1992	{
1613	if (idle > max_idle)	1993	/* initialise timeout once */
1614	{	1994	if (!ts.tv_sec)
1615	--idle;	1995	ts.tv_sec = time (0) + idle_timeout;
1616	X_UNLOCK (reqlock);
1617	X_LOCK (wrklock);
1618	--started;
1619	X_UNLOCK (wrklock);
1620	goto quit;
1621	}
1622		1996
1623	/* we are allowed to idle, so do so without any timeout */
1624	X_COND_WAIT (reqwait, reqlock);	1997	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
		1998	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
1625	}	1999	}
1626		2000
1627	--idle;	2001	--idle;
1628	}	2002	}
1629		2003
…		…
1632	X_UNLOCK (reqlock);	2006	X_UNLOCK (reqlock);
1633		2007
1634	if (req->type < 0)	2008	if (req->type < 0)
1635	goto quit;	2009	goto quit;
1636		2010
1637	if (!EIO_CANCELLED (req))
1638	ETP_EXECUTE (self, req);	2011	ETP_EXECUTE (self, req);
1639		2012
1640	X_LOCK (reslock);	2013	X_LOCK (reslock);
1641		2014
1642	++npending;	2015	++npending;
1643		2016
…		…
1658	return 0;	2031	return 0;
1659	}	2032	}
1660		2033
1661	/*****************************************************************************/	2034	/*****************************************************************************/
1662		2035
		2036	int ecb_cold
1663	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	2037	eio_init (void (*want_poll)(void), void (*done_poll)(void))
1664	{	2038	{
		2039	#if !HAVE_PREADWRITE
		2040	X_MUTEX_CREATE (preadwritelock);
		2041	#endif
		2042
1665	return etp_init (want_poll, done_poll);	2043	return etp_init (want_poll, done_poll);
1666	}	2044	}
1667		2045
		2046	ecb_inline void
1668	static void eio_api_destroy (eio_req *req)	2047	eio_api_destroy (eio_req *req)
1669	{	2048	{
1670	free (req);	2049	free (req);
1671	}	2050	}
1672		2051
1673	#define REQ(rtype) \	2052	#define REQ(rtype) \
…		…
1692	{ \	2071	{ \
1693	eio_api_destroy (req); \	2072	eio_api_destroy (req); \
1694	return 0; \	2073	return 0; \
1695	}	2074	}
1696		2075
		2076	static void
1697	static void eio_execute (etp_worker *self, eio_req *req)	2077	eio_execute (etp_worker *self, eio_req *req)
1698	{	2078	{
		2079	if (ecb_expect_false (EIO_CANCELLED (req)))
		2080	{
		2081	req->result = -1;
		2082	req->errorno = ECANCELED;
		2083	return;
		2084	}
		2085
1699	switch (req->type)	2086	switch (req->type)
1700	{	2087	{
1701	case EIO_READ: ALLOC (req->size);	2088	case EIO_READ: ALLOC (req->size);
1702	req->result = req->offs >= 0	2089	req->result = req->offs >= 0
1703	? pread (req->int1, req->ptr2, req->size, req->offs)	2090	? pread (req->int1, req->ptr2, req->size, req->offs)
…		…
1705	case EIO_WRITE: req->result = req->offs >= 0	2092	case EIO_WRITE: req->result = req->offs >= 0
1706	? pwrite (req->int1, req->ptr2, req->size, req->offs)	2093	? pwrite (req->int1, req->ptr2, req->size, req->offs)
1707	: write (req->int1, req->ptr2, req->size); break;	2094	: write (req->int1, req->ptr2, req->size); break;
1708		2095
1709	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;	2096	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1710	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;	2097	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break;
1711		2098
1712	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));	2099	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1713	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;	2100	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
1714	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	2101	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
1715	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;	2102	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
…		…
1737	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;	2124	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
1738	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;	2125	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
1739	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;	2126	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
1740	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;	2127	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
1741		2128
		2129	case EIO_REALPATH: eio__realpath (req, self); break;
		2130
1742	case EIO_READLINK: ALLOC (PATH_MAX);	2131	case EIO_READLINK: ALLOC (PATH_MAX);
1743	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;	2132	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
1744		2133
1745	case EIO_SYNC: req->result = 0; sync (); break;	2134	case EIO_SYNC: req->result = 0; sync (); break;
1746	case EIO_FSYNC: req->result = fsync (req->int1); break;	2135	case EIO_FSYNC: req->result = fsync (req->int1); break;
1747	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;	2136	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		2137	case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break;
		2138	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
1748	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;	2139	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
1749	case EIO_MTOUCH: req->result = eio__mtouch (req); break;	2140	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
1750	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;	2141	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
1751	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;	2142	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
1752	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;	2143	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
1753		2144
1754	case EIO_READDIR: eio__scandir (req, self); break;	2145	case EIO_READDIR: eio__scandir (req, self); break;
1755		2146
1756	case EIO_BUSY:	2147	case EIO_BUSY:
1757	#ifdef _WIN32	2148	#ifdef _WIN32
…		…
1837	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)	2228	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
1838	{	2229	{
1839	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;	2230	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
1840	}	2231	}
1841		2232
		2233	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
		2234	{
		2235	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
		2236	}
		2237
		2238	eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data)
		2239	{
		2240	REQ (EIO_SYNCFS); req->int1 = fd; SEND;
		2241	}
		2242
		2243	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		2244	{
		2245	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		2246	}
		2247
1842	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)	2248	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
1843	{	2249	{
1844	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;	2250	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
1845	}	2251	}
1846		2252
…		…
1852	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)	2258	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
1853	{	2259	{
1854	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;	2260	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
1855	}	2261	}
1856		2262
1857	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)	2263	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
1858	{	2264	{
1859	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;	2265	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
1860	}
1861
1862	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1863	{
1864	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1865	}	2266	}
1866		2267
1867	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)	2268	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
1868	{	2269	{
1869	REQ (EIO_CLOSE); req->int1 = fd; SEND;	2270	REQ (EIO_CLOSE); req->int1 = fd; SEND;
…		…
1907	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)	2308	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
1908	{	2309	{
1909	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;	2310	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1910	}	2311	}
1911		2312
1912	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)	2313	eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1913	{	2314	{
1914	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2315	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1915	}	2316	}
1916		2317
1917	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)	2318	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
…		…
1937	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)	2338	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
1938	{	2339	{
1939	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;	2340	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1940	}	2341	}
1941		2342
1942	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)	2343	eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1943	{	2344	{
1944	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2345	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1945	}	2346	}
1946		2347
1947	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)	2348	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
…		…
1961	}	2362	}
1962		2363
1963	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)	2364	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
1964	{	2365	{
1965	return eio__1path (EIO_READLINK, path, pri, cb, data);	2366	return eio__1path (EIO_READLINK, path, pri, cb, data);
		2367	}
		2368
		2369	eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
		2370	{
		2371	return eio__1path (EIO_REALPATH, path, pri, cb, data);
1966	}	2372	}
1967		2373
1968	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)	2374	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
1969	{	2375	{
1970	return eio__1path (EIO_STAT, path, pri, cb, data);	2376	return eio__1path (EIO_STAT, path, pri, cb, data);
…		…
2029	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)	2435	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
2030	{	2436	{
2031	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);	2437	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
2032	}	2438	}
2033		2439
2034	eio_req *eio_custom (void (*)(eio_req *) execute, int pri, eio_cb cb, void *data);	2440	eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
2035	{	2441	{
2036	REQ (EIO_CUSTOM); req->feed = execute; SEND;	2442	REQ (EIO_CUSTOM); req->feed = execute; SEND;
2037	}	2443	}
2038		2444
2039	#endif	2445	#endif
…		…
2050	#undef SEND	2456	#undef SEND
2051		2457
2052	/*****************************************************************************/	2458	/*****************************************************************************/
2053	/* grp functions */	2459	/* grp functions */
2054		2460
		2461	void
2055	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	2462	eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
2056	{	2463	{
2057	grp->int2 = limit;	2464	grp->int2 = limit;
2058	grp->feed = feed;	2465	grp->feed = feed;
2059		2466
2060	grp_try_feed (grp);	2467	grp_try_feed (grp);
2061	}	2468	}
2062		2469
		2470	void
2063	void eio_grp_limit (eio_req *grp, int limit)	2471	eio_grp_limit (eio_req *grp, int limit)
2064	{	2472	{
2065	grp->int2 = limit;	2473	grp->int2 = limit;
2066		2474
2067	grp_try_feed (grp);	2475	grp_try_feed (grp);
2068	}	2476	}
2069		2477
		2478	void
2070	void eio_grp_add (eio_req *grp, eio_req *req)	2479	eio_grp_add (eio_req *grp, eio_req *req)
2071	{	2480	{
2072	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2481	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
2073		2482
2074	grp->flags |= EIO_FLAG_GROUPADD;	2483	grp->flags |= EIO_FLAG_GROUPADD;
2075		2484
…		…
2086	}	2495	}
2087		2496
2088	/*****************************************************************************/	2497	/*****************************************************************************/
2089	/* misc garbage */	2498	/* misc garbage */
2090		2499
		2500	eio_ssize_t
2091	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)	2501	eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
2092	{	2502	{
2093	etp_worker wrk;
2094	ssize_t ret;
2095
2096	wrk.dbuf = 0;
2097
2098	ret = eio__sendfile (ofd, ifd, offset, count, &wrk);	2503	return eio__sendfile (ofd, ifd, offset, count);
2099
2100	if (wrk.dbuf)
2101	free (wrk.dbuf);
2102
2103	return ret;
2104	}	2504	}
2105		2505

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