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Comparing libeio/eio.c (file contents):
Revision 1.8 by root, Sun May 11 20:08:37 2008 UTC vs.
Revision 1.94 by root, Mon Jul 18 02:59:58 2011 UTC

		1	/*
		2	* libeio implementation
		3	*
		4	* Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libeio@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without modifica-
		8	* tion, are permitted provided that the following conditions are met:
		9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*
		28	* Alternatively, the contents of this file may be used under the terms of
		29	* the GNU General Public License ("GPL") version 2 or any later version,
		30	* in which case the provisions of the GPL are applicable instead of
		31	* the above. If you wish to allow the use of your version of this file
		32	* only under the terms of the GPL and not to allow others to use your
		33	* version of this file under the BSD license, indicate your decision
		34	* by deleting the provisions above and replace them with the notice
		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
		37	* either the BSD or the GPL.
		38	*/
		39
		40	#ifndef _WIN32
		41	# include "config.h"
		42	#endif
		43
1	#include "eio.h"	44	#include "eio.h"
		45	#include "ecb.h"
		46
		47	#ifdef EIO_STACKSIZE
		48	# define XTHREAD_STACKSIZE EIO_STACKSIZE
		49	#endif
2	#include "xthread.h"	50	#include "xthread.h"
3		51
4	#include <errno.h>	52	#include <errno.h>
5	#include <stddef.h>	53	#include <stddef.h>
6	#include <stdlib.h>	54	#include <stdlib.h>
…		…
10	#include <sys/stat.h>	58	#include <sys/stat.h>
11	#include <limits.h>	59	#include <limits.h>
12	#include <fcntl.h>	60	#include <fcntl.h>
13	#include <assert.h>	61	#include <assert.h>
14		62
		63	/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */
		64	/* intptr_t only comes from stdint.h, says idiot openbsd coder */
		65	#if HAVE_STDINT_H
		66	# include <stdint.h>
		67	#endif
		68
		69	#ifndef ECANCELED
		70	# define ECANCELED EDOM
		71	#endif
		72	#ifndef ELOOP
		73	# define ELOOP EDOM
		74	#endif
		75
		76	static void eio_destroy (eio_req *req);
		77
15	#ifndef EIO_FINISH	78	#ifndef EIO_FINISH
16	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	79	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
17	#endif	80	#endif
18		81
19	#ifndef EIO_DESTROY	82	#ifndef EIO_DESTROY
…		…
22		85
23	#ifndef EIO_FEED	86	#ifndef EIO_FEED
24	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)	87	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)
25	#endif	88	#endif
26		89
		90	#ifndef EIO_FD_TO_WIN32_HANDLE
		91	# define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		92	#endif
		93	#ifndef EIO_WIN32_HANDLE_TO_FD
		94	# define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		95	#endif
		96
		97	#define EIO_ERRNO(errval,retval) ((errno = errval), retval)
		98
		99	#define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1)
		100
27	#ifdef _WIN32	101	#ifdef _WIN32
28		102
29	/*doh*/	103	#undef PAGESIZE
		104	#define PAGESIZE 4096 /* GetSystemInfo? */
		105
		106	#ifdef EIO_STRUCT_STATI64
		107	#define stat(path,buf) _stati64 (path,buf)
		108	#define fstat(fd,buf) _fstati64 (path,buf)
		109	#endif
		110	#define lstat(path,buf) stat (path,buf)
		111	#define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
		112	#define mkdir(path,mode) _mkdir (path)
		113	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
		114
		115	#define chmod(path,mode) _chmod (path, mode)
		116	#define dup(fd) _dup (fd)
		117	#define dup2(fd1,fd2) _dup2 (fd1, fd2)
		118
		119	#define fchmod(fd,mode) EIO_ENOSYS ()
		120	#define chown(path,uid,gid) EIO_ENOSYS ()
		121	#define fchown(fd,uid,gid) EIO_ENOSYS ()
		122	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
		123	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
		124	#define mknod(path,mode,dev) EIO_ENOSYS ()
		125	#define sync() EIO_ENOSYS ()
		126	#define readlink(path,buf,s) EIO_ENOSYS ()
		127	#define statvfs(path,buf) EIO_ENOSYS ()
		128	#define fstatvfs(fd,buf) EIO_ENOSYS ()
		129
		130	/* we could even stat and see if it exists */
		131	static int
		132	symlink (const char *old, const char *neu)
		133	{
		134	#if WINVER >= 0x0600
		135	if (CreateSymbolicLink (neu, old, 1))
		136	return 0;
		137
		138	if (CreateSymbolicLink (neu, old, 0))
		139	return 0;
		140	#endif
		141
		142	return EIO_ERRNO (ENOENT, -1);
		143	}
		144
		145	/* POSIX API only */
		146	#define CreateHardLink(neu,old,flags) 0
		147	#define CreateSymbolicLink(neu,old,flags) 0
		148
		149	struct statvfs
		150	{
		151	int dummy;
		152	};
		153
		154	#define DT_DIR EIO_DT_DIR
		155	#define DT_REG EIO_DT_REG
		156	#define D_NAME(entp) entp.cFileName
		157	#define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG)
30		158
31	#else	159	#else
32		160
33	# include "config.h"
34	# include <sys/time.h>	161	#include <sys/time.h>
35	# include <sys/select.h>	162	#include <sys/select.h>
		163	#include <sys/statvfs.h>
36	# include <unistd.h>	164	#include <unistd.h>
37	# include <utime.h>	165	#include <utime.h>
38	# include <signal.h>	166	#include <signal.h>
39	# include <dirent.h>	167	#include <dirent.h>
40		168
		169	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		170	#include <sys/mman.h>
		171	#endif
		172
		173	#define D_NAME(entp) entp->d_name
		174
		175	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
		176	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
		177	#define _DIRENT_HAVE_D_TYPE /* sigh */
		178	#define D_INO(de) (de)->d_fileno
		179	#define D_NAMLEN(de) (de)->d_namlen
		180	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
		181	#define D_INO(de) (de)->d_ino
		182	#endif
		183
		184	#ifdef _D_EXACT_NAMLEN
		185	#undef D_NAMLEN
		186	#define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
		187	#endif
		188
		189	#ifdef _DIRENT_HAVE_D_TYPE
		190	#define D_TYPE(de) (de)->d_type
		191	#endif
		192
41	# ifndef EIO_STRUCT_DIRENT	193	#ifndef EIO_STRUCT_DIRENT
42	# define EIO_STRUCT_DIRENT struct dirent	194	#define EIO_STRUCT_DIRENT struct dirent
		195	#endif
		196
43	# endif	197	#endif
44
45	#endif
46
47	# ifndef EIO_STRUCT_STAT
48	# define EIO_STRUCT_STAT struct stat
49	# endif
50		198
51	#if HAVE_SENDFILE	199	#if HAVE_SENDFILE
52	# if __linux	200	# if __linux
53	# include <sys/sendfile.h>	201	# include <sys/sendfile.h>
54	# elif __freebsd	202	# elif __FreeBSD__ || defined __APPLE__
55	# include <sys/socket.h>	203	# include <sys/socket.h>
56	# include <sys/uio.h>	204	# include <sys/uio.h>
57	# elif __hpux	205	# elif __hpux
58	# include <sys/socket.h>	206	# include <sys/socket.h>
59	# elif __solaris /* not yet */	207	# elif __solaris
60	# include <sys/sendfile.h>	208	# include <sys/sendfile.h>
61	# else	209	# else
62	# error sendfile support requested but not available	210	# error sendfile support requested but not available
63	# endif	211	# endif
64	#endif	212	#endif
65		213
66	/* number of seconds after which an idle threads exit */	214	#ifndef D_TYPE
67	#define IDLE_TIMEOUT 10	215	# define D_TYPE(de) 0
		216	#endif
		217	#ifndef D_INO
		218	# define D_INO(de) 0
		219	#endif
		220	#ifndef D_NAMLEN
		221	# define D_NAMLEN(entp) strlen (D_NAME (entp))
		222	#endif
68		223
69	/* used for struct dirent, AIX doesn't provide it */	224	/* used for struct dirent, AIX doesn't provide it */
70	#ifndef NAME_MAX	225	#ifndef NAME_MAX
71	# define NAME_MAX 4096	226	# define NAME_MAX 4096
72	#endif	227	#endif
73		228
		229	/* used for readlink etc. */
		230	#ifndef PATH_MAX
		231	# define PATH_MAX 4096
		232	#endif
		233
74	/* buffer size for various temporary buffers */	234	/* buffer size for various temporary buffers */
75	#define EIO_BUFSIZE 65536	235	#define EIO_BUFSIZE 65536
76		236
77	#define dBUF \	237	#define dBUF \
78	char *eio_buf; \
79	X_LOCK (wrklock); \
80	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	238	char *eio_buf = malloc (EIO_BUFSIZE); \
81	X_UNLOCK (wrklock); \	239	errno = ENOMEM; \
82	if (!eio_buf) \	240	if (!eio_buf) \
83	return -1;	241	return -1
		242
		243	#define FUBd \
		244	free (eio_buf)
84		245
85	#define EIO_TICKS ((1000000 + 1023) >> 10)	246	#define EIO_TICKS ((1000000 + 1023) >> 10)
		247
		248	#define ETP_PRI_MIN EIO_PRI_MIN
		249	#define ETP_PRI_MAX EIO_PRI_MAX
		250
		251	struct etp_worker;
		252
		253	#define ETP_REQ eio_req
		254	#define ETP_DESTROY(req) eio_destroy (req)
		255	static int eio_finish (eio_req *req);
		256	#define ETP_FINISH(req) eio_finish (req)
		257	static void eio_execute (struct etp_worker *self, eio_req *req);
		258	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		259
		260	/*****************************************************************************/
		261
		262	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		263
		264	/* calculate time difference in ~1/EIO_TICKS of a second */
		265	ecb_inline int
		266	tvdiff (struct timeval *tv1, struct timeval *tv2)
		267	{
		268	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		269	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		270	}
		271
		272	static unsigned int started, idle, wanted = 4;
86		273
87	static void (*want_poll_cb) (void);	274	static void (*want_poll_cb) (void);
88	static void (*done_poll_cb) (void);	275	static void (*done_poll_cb) (void);
89		276
90	static unsigned int max_poll_time = 0;	277	static unsigned int max_poll_time; /* reslock */
91	static unsigned int max_poll_reqs = 0;	278	static unsigned int max_poll_reqs; /* reslock */
92		279
93	/* calculcate time difference in ~1/EIO_TICKS of a second */	280	static volatile unsigned int nreqs; /* reqlock */
94	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	281	static volatile unsigned int nready; /* reqlock */
95	{	282	static volatile unsigned int npending; /* reqlock */
96	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	283	static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
97	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);	284	static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
98	}
99		285
100	static unsigned int started, idle, wanted;	286	static xmutex_t wrklock;
		287	static xmutex_t reslock;
		288	static xmutex_t reqlock;
		289	static xcond_t reqwait;
		290
		291	#if !HAVE_PREADWRITE
		292	/*
		293	* make our pread/pwrite emulation safe against themselves, but not against
		294	* normal read/write by using a mutex. slows down execution a lot,
		295	* but that's your problem, not mine.
		296	*/
		297	static xmutex_t preadwritelock;
		298	#endif
		299
		300	typedef struct etp_worker
		301	{
		302	/* locked by wrklock */
		303	struct etp_worker *prev, *next;
		304
		305	xthread_t tid;
		306
		307	/* locked by reslock, reqlock or wrklock */
		308	ETP_REQ *req; /* currently processed request */
		309
		310	#ifdef ETP_WORKER_COMMON
		311	ETP_WORKER_COMMON
		312	#endif
		313	} etp_worker;
		314
		315	static etp_worker wrk_first; /* NOT etp */
		316
		317	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		318	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
101		319
102	/* worker threads management */	320	/* worker threads management */
103	static mutex_t wrklock = X_MUTEX_INIT;
104		321
105	typedef struct worker {	322	static void ecb_cold
106	/* locked by wrklock */
107	struct worker *prev, *next;
108
109	thread_t tid;
110
111	/* locked by reslock, reqlock or wrklock */
112	eio_req *req; /* currently processed request */
113	void *dbuf;
114	DIR *dirp;
115	} worker;
116
117	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
118
119	static void worker_clear (worker *wrk)	323	etp_worker_clear (etp_worker *wrk)
120	{	324	{
121	if (wrk->dirp)
122	{
123	closedir (wrk->dirp);
124	wrk->dirp = 0;
125	}
126
127	if (wrk->dbuf)
128	{
129	free (wrk->dbuf);
130	wrk->dbuf = 0;
131	}
132	}	325	}
133		326
134	static void worker_free (worker *wrk)	327	static void ecb_cold
		328	etp_worker_free (etp_worker *wrk)
135	{	329	{
136	wrk->next->prev = wrk->prev;	330	wrk->next->prev = wrk->prev;
137	wrk->prev->next = wrk->next;	331	wrk->prev->next = wrk->next;
138		332
139	free (wrk);	333	free (wrk);
140	}	334	}
141		335
142	static volatile unsigned int nreqs, nready, npending;	336	static unsigned int
143	static volatile unsigned int max_idle = 4;	337	etp_nreqs (void)
144
145	static mutex_t reslock = X_MUTEX_INIT;
146	static mutex_t reqlock = X_MUTEX_INIT;
147	static cond_t reqwait = X_COND_INIT;
148
149	unsigned int eio_nreqs (void)
150	{	338	{
		339	int retval;
		340	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		341	retval = nreqs;
		342	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
151	return nreqs;	343	return retval;
152	}	344	}
153		345
154	unsigned int eio_nready (void)	346	static unsigned int
		347	etp_nready (void)
155	{	348	{
156	unsigned int retval;	349	unsigned int retval;
157		350
158	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	351	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
159	retval = nready;	352	retval = nready;
160	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	353	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
161		354
162	return retval;	355	return retval;
163	}	356	}
164		357
165	unsigned int eio_npending (void)	358	static unsigned int
		359	etp_npending (void)
166	{	360	{
167	unsigned int retval;	361	unsigned int retval;
168		362
169	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	363	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
170	retval = npending;	364	retval = npending;
171	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	365	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
172		366
173	return retval;	367	return retval;
174	}	368	}
175		369
176	unsigned int eio_nthreads (void)	370	static unsigned int
		371	etp_nthreads (void)
177	{	372	{
178	unsigned int retval;	373	unsigned int retval;
179		374
180	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	375	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
181	retval = started;	376	retval = started;
…		…
188	* a somewhat faster data structure might be nice, but	383	* a somewhat faster data structure might be nice, but
189	* with 8 priorities this actually needs <20 insns	384	* with 8 priorities this actually needs <20 insns
190	* per shift, the most expensive operation.	385	* per shift, the most expensive operation.
191	*/	386	*/
192	typedef struct {	387	typedef struct {
193	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	388	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
194	int size;	389	int size;
195	} reqq;	390	} etp_reqq;
196		391
197	static reqq req_queue;	392	static etp_reqq req_queue;
198	static reqq res_queue;	393	static etp_reqq res_queue;
199		394
200	static int reqq_push (reqq *q, eio_req *req)	395	static void ecb_noinline ecb_cold
		396	reqq_init (etp_reqq *q)
		397	{
		398	int pri;
		399
		400	for (pri = 0; pri < ETP_NUM_PRI; ++pri)
		401	q->qs[pri] = q->qe[pri] = 0;
		402
		403	q->size = 0;
		404	}
		405
		406	static int ecb_noinline
		407	reqq_push (etp_reqq *q, ETP_REQ *req)
201	{	408	{
202	int pri = req->pri;	409	int pri = req->pri;
203	req->next = 0;	410	req->next = 0;
204		411
205	if (q->qe[pri])	412	if (q->qe[pri])
…		…
211	q->qe[pri] = q->qs[pri] = req;	418	q->qe[pri] = q->qs[pri] = req;
212		419
213	return q->size++;	420	return q->size++;
214	}	421	}
215		422
216	static eio_req *reqq_shift (reqq *q)	423	static ETP_REQ * ecb_noinline
		424	reqq_shift (etp_reqq *q)
217	{	425	{
218	int pri;	426	int pri;
219		427
220	if (!q->size)	428	if (!q->size)
221	return 0;	429	return 0;
222		430
223	--q->size;	431	--q->size;
224		432
225	for (pri = EIO_NUM_PRI; pri--; )	433	for (pri = ETP_NUM_PRI; pri--; )
226	{	434	{
227	eio_req *req = q->qs[pri];	435	eio_req *req = q->qs[pri];
228		436
229	if (req)	437	if (req)
230	{	438	{
…		…
236	}	444	}
237		445
238	abort ();	446	abort ();
239	}	447	}
240		448
241	static void grp_try_feed (eio_req *grp)	449	static int ecb_cold
		450	etp_init (void (*want_poll)(void), void (*done_poll)(void))
242	{	451	{
243	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	452	X_MUTEX_CREATE (wrklock);
244	{	453	X_MUTEX_CREATE (reslock);
245	int old_len = grp->size;	454	X_MUTEX_CREATE (reqlock);
		455	X_COND_CREATE (reqwait);
246		456
247	EIO_FEED (grp);	457	reqq_init (&req_queue);
		458	reqq_init (&res_queue);
248		459
249	/* stop if no progress has been made */	460	wrk_first.next =
250	if (old_len == grp->size)	461	wrk_first.prev = &wrk_first;
251	{
252	grp->feed = 0;
253	break;
254	}
255	}
256	}
257		462
258	static int eio_finish (eio_req *req);	463	started = 0;
		464	idle = 0;
		465	nreqs = 0;
		466	nready = 0;
		467	npending = 0;
259		468
260	static int grp_dec (eio_req *grp)	469	want_poll_cb = want_poll;
261	{	470	done_poll_cb = done_poll;
262	--grp->size;
263		471
264	/* call feeder, if applicable */
265	grp_try_feed (grp);
266
267	/* finish, if done */
268	if (!grp->size && grp->int1)
269	return eio_finish (grp);
270	else
271	return 0;	472	return 0;
272	}	473	}
273		474
274	void eio_destroy (eio_req *req)
275	{
276	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
277	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
278
279	EIO_DESTROY (req);
280	}
281
282	static int eio_finish (eio_req *req)
283	{
284	int res = EIO_FINISH (req);
285
286	if (req->grp)
287	{
288	int res2;
289	eio_req *grp = req->grp;
290
291	/* unlink request */
292	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
293	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
294
295	if (grp->grp_first == req)
296	grp->grp_first = req->grp_next;
297
298	res2 = grp_dec (grp);
299
300	if (!res && res2)
301	res = res2;
302	}
303
304	eio_destroy (req);
305
306	return res;
307	}
308
309	void eio_grp_cancel (eio_req *grp)
310	{
311	for (grp = grp->grp_first; grp; grp = grp->grp_next)
312	eio_cancel (grp);
313	}
314
315	void eio_cancel (eio_req *req)
316	{
317	X_LOCK (wrklock);
318	req->flags |= EIO_FLAG_CANCELLED;
319	X_UNLOCK (wrklock);
320
321	eio_grp_cancel (req);
322	}
323
324	X_THREAD_PROC (eio_proc);	475	X_THREAD_PROC (etp_proc);
325		476
326	static void start_thread (void)	477	static void ecb_cold
		478	etp_start_thread (void)
327	{	479	{
328	worker *wrk = calloc (1, sizeof (worker));	480	etp_worker *wrk = calloc (1, sizeof (etp_worker));
329		481
330	/*TODO*/	482	/*TODO*/
331	assert (("unable to allocate worker thread data", !wrk));	483	assert (("unable to allocate worker thread data", wrk));
332		484
333	X_LOCK (wrklock);	485	X_LOCK (wrklock);
334		486
335	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	487	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
336	{	488	{
337	wrk->prev = &wrk_first;	489	wrk->prev = &wrk_first;
338	wrk->next = wrk_first.next;	490	wrk->next = wrk_first.next;
339	wrk_first.next->prev = wrk;	491	wrk_first.next->prev = wrk;
340	wrk_first.next = wrk;	492	wrk_first.next = wrk;
…		…
344	free (wrk);	496	free (wrk);
345		497
346	X_UNLOCK (wrklock);	498	X_UNLOCK (wrklock);
347	}	499	}
348		500
		501	static void
349	static void maybe_start_thread (void)	502	etp_maybe_start_thread (void)
350	{	503	{
351	if (eio_nthreads () >= wanted)	504	if (ecb_expect_true (etp_nthreads () >= wanted))
352	return;	505	return;
353		506
354	/* todo: maybe use idle here, but might be less exact */	507	/* todo: maybe use idle here, but might be less exact */
355	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	508	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
356	return;	509	return;
357		510
358	start_thread ();	511	etp_start_thread ();
359	}	512	}
360		513
361	void eio_submit (eio_req *req)	514	static void ecb_cold
362	{	515	etp_end_thread (void)
363	++nreqs;
364
365	X_LOCK (reqlock);
366	++nready;
367	reqq_push (&req_queue, req);
368	X_COND_SIGNAL (reqwait);
369	X_UNLOCK (reqlock);
370
371	maybe_start_thread ();
372	}
373
374	static void end_thread (void)
375	{	516	{
376	eio_req *req = calloc (1, sizeof (eio_req));	517	eio_req *req = calloc (1, sizeof (eio_req));
377		518
378	req->type = EIO_QUIT;	519	req->type = -1;
379	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	520	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
380		521
381	X_LOCK (reqlock);	522	X_LOCK (reqlock);
382	reqq_push (&req_queue, req);	523	reqq_push (&req_queue, req);
383	X_COND_SIGNAL (reqwait);	524	X_COND_SIGNAL (reqwait);
384	X_UNLOCK (reqlock);	525	X_UNLOCK (reqlock);
…		…
386	X_LOCK (wrklock);	527	X_LOCK (wrklock);
387	--started;	528	--started;
388	X_UNLOCK (wrklock);	529	X_UNLOCK (wrklock);
389	}	530	}
390		531
391	void eio_set_max_poll_time (double nseconds)	532	static int
392	{
393	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
394	max_poll_time = nseconds;
395	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
396	}
397
398	void eio_set_max_poll_reqs (unsigned int maxreqs)
399	{
400	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
401	max_poll_reqs = maxreqs;
402	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
403	}
404
405	void eio_set_max_idle (unsigned int nthreads)
406	{
407	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
408	max_idle = nthreads <= 0 ? 1 : nthreads;
409	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
410	}
411
412	void eio_set_min_parallel (unsigned int nthreads)
413	{
414	if (wanted < nthreads)
415	wanted = nthreads;
416	}
417
418	void eio_set_max_parallel (unsigned int nthreads)
419	{
420	if (wanted > nthreads)
421	wanted = nthreads;
422
423	while (started > wanted)
424	end_thread ();
425	}
426
427	int eio_poll (void)	533	etp_poll (void)
428	{	534	{
429	int maxreqs = max_poll_reqs;	535	unsigned int maxreqs;
		536	unsigned int maxtime;
430	struct timeval tv_start, tv_now;	537	struct timeval tv_start, tv_now;
431	eio_req *req;
432		538
		539	X_LOCK (reslock);
		540	maxreqs = max_poll_reqs;
		541	maxtime = max_poll_time;
		542	X_UNLOCK (reslock);
		543
433	if (max_poll_time)	544	if (maxtime)
434	gettimeofday (&tv_start, 0);	545	gettimeofday (&tv_start, 0);
435		546
436	for (;;)	547	for (;;)
437	{	548	{
		549	ETP_REQ *req;
		550
438	maybe_start_thread ();	551	etp_maybe_start_thread ();
439		552
440	X_LOCK (reslock);	553	X_LOCK (reslock);
441	req = reqq_shift (&res_queue);	554	req = reqq_shift (&res_queue);
442		555
443	if (req)	556	if (req)
…		…
451	X_UNLOCK (reslock);	564	X_UNLOCK (reslock);
452		565
453	if (!req)	566	if (!req)
454	return 0;	567	return 0;
455		568
		569	X_LOCK (reqlock);
456	--nreqs;	570	--nreqs;
		571	X_UNLOCK (reqlock);
457		572
458	if (req->type == EIO_GROUP && req->size)	573	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
459	{	574	{
460	req->int1 = 1; /* mark request as delayed */	575	req->int1 = 1; /* mark request as delayed */
461	continue;	576	continue;
462	}	577	}
463	else	578	else
464	{	579	{
465	int res = eio_finish (req);	580	int res = ETP_FINISH (req);
466	if (res)	581	if (ecb_expect_false (res))
467	return res;	582	return res;
468	}	583	}
469		584
470	if (maxreqs && !--maxreqs)	585	if (ecb_expect_false (maxreqs && !--maxreqs))
471	break;	586	break;
472		587
473	if (max_poll_time)	588	if (maxtime)
474	{	589	{
475	gettimeofday (&tv_now, 0);	590	gettimeofday (&tv_now, 0);
476		591
477	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	592	if (tvdiff (&tv_start, &tv_now) >= maxtime)
478	break;	593	break;
479	}	594	}
480	}	595	}
481		596
482	errno = EAGAIN;	597	errno = EAGAIN;
483	return -1;	598	return -1;
484	}	599	}
485		600
		601	static void
		602	etp_cancel (ETP_REQ *req)
		603	{
		604	req->cancelled = 1;
		605
		606	eio_grp_cancel (req);
		607	}
		608
		609	static void
		610	etp_submit (ETP_REQ *req)
		611	{
		612	req->pri -= ETP_PRI_MIN;
		613
		614	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
		615	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		616
		617	if (ecb_expect_false (req->type == EIO_GROUP))
		618	{
		619	/* I hope this is worth it :/ */
		620	X_LOCK (reqlock);
		621	++nreqs;
		622	X_UNLOCK (reqlock);
		623
		624	X_LOCK (reslock);
		625
		626	++npending;
		627
		628	if (!reqq_push (&res_queue, req) && want_poll_cb)
		629	want_poll_cb ();
		630
		631	X_UNLOCK (reslock);
		632	}
		633	else
		634	{
		635	X_LOCK (reqlock);
		636	++nreqs;
		637	++nready;
		638	reqq_push (&req_queue, req);
		639	X_COND_SIGNAL (reqwait);
		640	X_UNLOCK (reqlock);
		641
		642	etp_maybe_start_thread ();
		643	}
		644	}
		645
		646	static void ecb_cold
		647	etp_set_max_poll_time (double nseconds)
		648	{
		649	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		650	max_poll_time = nseconds * EIO_TICKS;
		651	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		652	}
		653
		654	static void ecb_cold
		655	etp_set_max_poll_reqs (unsigned int maxreqs)
		656	{
		657	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		658	max_poll_reqs = maxreqs;
		659	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		660	}
		661
		662	static void ecb_cold
		663	etp_set_max_idle (unsigned int nthreads)
		664	{
		665	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		666	max_idle = nthreads;
		667	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		668	}
		669
		670	static void ecb_cold
		671	etp_set_idle_timeout (unsigned int seconds)
		672	{
		673	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		674	idle_timeout = seconds;
		675	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		676	}
		677
		678	static void ecb_cold
		679	etp_set_min_parallel (unsigned int nthreads)
		680	{
		681	if (wanted < nthreads)
		682	wanted = nthreads;
		683	}
		684
		685	static void ecb_cold
		686	etp_set_max_parallel (unsigned int nthreads)
		687	{
		688	if (wanted > nthreads)
		689	wanted = nthreads;
		690
		691	while (started > wanted)
		692	etp_end_thread ();
		693	}
		694
		695	/*****************************************************************************/
		696
		697	static void
		698	grp_try_feed (eio_req *grp)
		699	{
		700	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
		701	{
		702	grp->flags &= ~EIO_FLAG_GROUPADD;
		703
		704	EIO_FEED (grp);
		705
		706	/* stop if no progress has been made */
		707	if (!(grp->flags & EIO_FLAG_GROUPADD))
		708	{
		709	grp->feed = 0;
		710	break;
		711	}
		712	}
		713	}
		714
		715	static int
		716	grp_dec (eio_req *grp)
		717	{
		718	--grp->size;
		719
		720	/* call feeder, if applicable */
		721	grp_try_feed (grp);
		722
		723	/* finish, if done */
		724	if (!grp->size && grp->int1)
		725	return eio_finish (grp);
		726	else
		727	return 0;
		728	}
		729
		730	static void
		731	eio_destroy (eio_req *req)
		732	{
		733	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
		734	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
		735
		736	EIO_DESTROY (req);
		737	}
		738
		739	static int
		740	eio_finish (eio_req *req)
		741	{
		742	int res = EIO_FINISH (req);
		743
		744	if (req->grp)
		745	{
		746	int res2;
		747	eio_req *grp = req->grp;
		748
		749	/* unlink request */
		750	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		751	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		752
		753	if (grp->grp_first == req)
		754	grp->grp_first = req->grp_next;
		755
		756	res2 = grp_dec (grp);
		757
		758	if (!res)
		759	res = res2;
		760	}
		761
		762	eio_destroy (req);
		763
		764	return res;
		765	}
		766
		767	void
		768	eio_grp_cancel (eio_req *grp)
		769	{
		770	for (grp = grp->grp_first; grp; grp = grp->grp_next)
		771	eio_cancel (grp);
		772	}
		773
		774	void
		775	eio_cancel (eio_req *req)
		776	{
		777	etp_cancel (req);
		778	}
		779
		780	void
		781	eio_submit (eio_req *req)
		782	{
		783	etp_submit (req);
		784	}
		785
		786	unsigned int
		787	eio_nreqs (void)
		788	{
		789	return etp_nreqs ();
		790	}
		791
		792	unsigned int
		793	eio_nready (void)
		794	{
		795	return etp_nready ();
		796	}
		797
		798	unsigned int
		799	eio_npending (void)
		800	{
		801	return etp_npending ();
		802	}
		803
		804	unsigned int ecb_cold
		805	eio_nthreads (void)
		806	{
		807	return etp_nthreads ();
		808	}
		809
		810	void ecb_cold
		811	eio_set_max_poll_time (double nseconds)
		812	{
		813	etp_set_max_poll_time (nseconds);
		814	}
		815
		816	void ecb_cold
		817	eio_set_max_poll_reqs (unsigned int maxreqs)
		818	{
		819	etp_set_max_poll_reqs (maxreqs);
		820	}
		821
		822	void ecb_cold
		823	eio_set_max_idle (unsigned int nthreads)
		824	{
		825	etp_set_max_idle (nthreads);
		826	}
		827
		828	void ecb_cold
		829	eio_set_idle_timeout (unsigned int seconds)
		830	{
		831	etp_set_idle_timeout (seconds);
		832	}
		833
		834	void ecb_cold
		835	eio_set_min_parallel (unsigned int nthreads)
		836	{
		837	etp_set_min_parallel (nthreads);
		838	}
		839
		840	void ecb_cold
		841	eio_set_max_parallel (unsigned int nthreads)
		842	{
		843	etp_set_max_parallel (nthreads);
		844	}
		845
		846	int eio_poll (void)
		847	{
		848	return etp_poll ();
		849	}
		850
486	/*****************************************************************************/	851	/*****************************************************************************/
487	/* work around various missing functions */	852	/* work around various missing functions */
488		853
489	#if !HAVE_PREADWRITE	854	#if !HAVE_PREADWRITE
		855	# undef pread
		856	# undef pwrite
490	# define pread aio_pread	857	# define pread eio__pread
491	# define pwrite aio_pwrite	858	# define pwrite eio__pwrite
492		859
493	/*	860	static eio_ssize_t
494	* make our pread/pwrite safe against themselves, but not against	861	eio__pread (int fd, void *buf, size_t count, off_t offset)
495	* normal read/write by using a mutex. slows down execution a lot,
496	* but that's your problem, not mine.
497	*/
498	static mutex_t preadwritelock = X_MUTEX_INIT;
499
500	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
501	{	862	{
502	ssize_t res;	863	eio_ssize_t res;
503	off_t ooffset;	864	off_t ooffset;
504		865
505	X_LOCK (preadwritelock);	866	X_LOCK (preadwritelock);
506	ooffset = lseek (fd, 0, SEEK_CUR);	867	ooffset = lseek (fd, 0, SEEK_CUR);
507	lseek (fd, offset, SEEK_SET);	868	lseek (fd, offset, SEEK_SET);
…		…
510	X_UNLOCK (preadwritelock);	871	X_UNLOCK (preadwritelock);
511		872
512	return res;	873	return res;
513	}	874	}
514		875
515	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	876	static eio_ssize_t
		877	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
516	{	878	{
517	ssize_t res;	879	eio_ssize_t res;
518	off_t ooffset;	880	off_t ooffset;
519		881
520	X_LOCK (preadwritelock);	882	X_LOCK (preadwritelock);
521	ooffset = lseek (fd, 0, SEEK_CUR);	883	ooffset = lseek (fd, 0, SEEK_CUR);
522	lseek (fd, offset, SEEK_SET);	884	lseek (fd, offset, SEEK_SET);
523	res = write (fd, buf, count);	885	res = write (fd, buf, count);
524	lseek (fd, offset, SEEK_SET);	886	lseek (fd, ooffset, SEEK_SET);
525	X_UNLOCK (preadwritelock);	887	X_UNLOCK (preadwritelock);
526		888
527	return res;	889	return res;
528	}	890	}
529	#endif	891	#endif
530		892
531	#ifndef HAVE_FUTIMES	893	#ifndef HAVE_UTIMES
532		894
		895	# undef utimes
533	# define utimes(path,times) aio_utimes (path, times)	896	# define utimes(path,times) eio__utimes (path, times)
534	# define futimes(fd,times) aio_futimes (fd, times)
535		897
		898	static int
536	static int aio_utimes (const char *filename, const struct timeval times[2])	899	eio__utimes (const char *filename, const struct timeval times[2])
537	{	900	{
538	if (times)	901	if (times)
539	{	902	{
540	struct utimbuf buf;	903	struct utimbuf buf;
541		904
…		…
546	}	909	}
547	else	910	else
548	return utime (filename, 0);	911	return utime (filename, 0);
549	}	912	}
550		913
		914	#endif
		915
		916	#ifndef HAVE_FUTIMES
		917
		918	# undef futimes
		919	# define futimes(fd,times) eio__futimes (fd, times)
		920
		921	static int
551	static int aio_futimes (int fd, const struct timeval tv[2])	922	eio__futimes (int fd, const struct timeval tv[2])
552	{	923	{
553	errno = ENOSYS;	924	errno = ENOSYS;
554	return -1;	925	return -1;
555	}	926	}
556		927
557	#endif	928	#endif
558		929
559	#if !HAVE_FDATASYNC	930	#if !HAVE_FDATASYNC
		931	# undef fdatasync
560	# define fdatasync fsync	932	# define fdatasync(fd) fsync (fd)
561	#endif	933	#endif
		934
		935	/* sync_file_range always needs emulation */
		936	static int
		937	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
		938	{
		939	#if HAVE_SYNC_FILE_RANGE
		940	int res;
		941
		942	if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
		943	|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
		944	|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
		945	{
		946	flags = 0
		947	| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
		948	| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
		949	| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
		950	}
		951
		952	res = sync_file_range (fd, offset, nbytes, flags);
		953
		954	if (!res || errno != ENOSYS)
		955	return res;
		956	#endif
		957
		958	/* even though we could play tricks with the flags, it's better to always
		959	* call fdatasync, as that matches the expectation of its users best */
		960	return fdatasync (fd);
		961	}
		962
		963	static int
		964	eio__fallocate (int fd, int mode, off_t offset, size_t len)
		965	{
		966	#if HAVE_FALLOCATE
		967	return fallocate (fd, mode, offset, len);
		968	#else
		969	errno = ENOSYS;
		970	return -1;
		971	#endif
		972	}
562		973
563	#if !HAVE_READAHEAD	974	#if !HAVE_READAHEAD
		975	# undef readahead
564	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	976	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
565		977
		978	static eio_ssize_t
566	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	979	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
567	{	980	{
568	size_t todo = count;	981	size_t todo = count;
569	dBUF;	982	dBUF;
570		983
571	while (todo > 0)	984	while (todo > 0)
…		…
575	pread (fd, eio_buf, len, offset);	988	pread (fd, eio_buf, len, offset);
576	offset += len;	989	offset += len;
577	todo -= len;	990	todo -= len;
578	}	991	}
579		992
		993	FUBd;
		994
580	errno = 0;	995	errno = 0;
581	return count;	996	return count;
582	}	997	}
583		998
584	#endif	999	#endif
585		1000
586	#if !HAVE_READDIR_R
587	# define readdir_r aio_readdir_r
588
589	static mutex_t readdirlock = X_MUTEX_INIT;
590
591	static int readdir_r (DIR *dirp, EIO_STRUCT_DIRENT *ent, EIO_STRUCT_DIRENT **res)
592	{
593	EIO_STRUCT_DIRENT *e;
594	int errorno;
595
596	X_LOCK (readdirlock);
597
598	e = readdir (dirp);
599	errorno = errno;
600
601	if (e)
602	{
603	*res = ent;
604	strcpy (ent->d_name, e->d_name);
605	}
606	else
607	*res = 0;
608
609	X_UNLOCK (readdirlock);
610
611	errno = errorno;
612	return e ? 0 : -1;
613	}
614	#endif
615
616	/* sendfile always needs emulation */	1001	/* sendfile always needs emulation */
		1002	static eio_ssize_t
617	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	1003	eio__sendfile (int ofd, int ifd, off_t offset, size_t count)
618	{	1004	{
		1005	eio_ssize_t written = 0;
619	ssize_t res;	1006	eio_ssize_t res;
620		1007
621	if (!count)	1008	if (!count)
622	return 0;	1009	return 0;
623		1010
		1011	for (;;)
		1012	{
		1013	#ifdef __APPLE__
		1014	# undef HAVE_SENDFILE /* broken, as everything on os x */
		1015	#endif
624	#if HAVE_SENDFILE	1016	#if HAVE_SENDFILE
625	# if __linux	1017	# if __linux
		1018	off_t soffset = offset;
626	res = sendfile (ofd, ifd, &offset, count);	1019	res = sendfile (ofd, ifd, &soffset, count);
627		1020
628	# elif __freebsd	1021	# elif __FreeBSD__
629	/*	1022	/*
630	* Of course, the freebsd sendfile is a dire hack with no thoughts	1023	* Of course, the freebsd sendfile is a dire hack with no thoughts
631	* wasted on making it similar to other I/O functions.	1024	* wasted on making it similar to other I/O functions.
632	*/	1025	*/
633	{
634	off_t sbytes;	1026	off_t sbytes;
635	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	1027	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
636		1028
637	if (res < 0 && sbytes)	1029	#if 0 /* according to the manpage, this is correct, but broken behaviour */
638	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */	1030	/* freebsd' sendfile will return 0 on success */
		1031	/* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
		1032	/* not on e.g. EIO or EPIPE - sounds broken */
		1033	if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
639	res = sbytes;	1034	res = sbytes;
640	}	1035	#endif
		1036
		1037	/* according to source inspection, this is correct, and useful behaviour */
		1038	if (sbytes)
		1039	res = sbytes;
		1040
		1041	# elif defined (__APPLE__)
		1042	off_t sbytes = count;
		1043	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
		1044
		1045	/* according to the manpage, sbytes is always valid */
		1046	if (sbytes)
		1047	res = sbytes;
641		1048
642	# elif __hpux	1049	# elif __hpux
643	res = sendfile (ofd, ifd, offset, count, 0, 0);	1050	res = sendfile (ofd, ifd, offset, count, 0, 0);
644		1051
645	# elif __solaris	1052	# elif __solaris
646	{
647	struct sendfilevec vec;	1053	struct sendfilevec vec;
648	size_t sbytes;	1054	size_t sbytes;
649		1055
650	vec.sfv_fd = ifd;	1056	vec.sfv_fd = ifd;
651	vec.sfv_flag = 0;	1057	vec.sfv_flag = 0;
652	vec.sfv_off = offset;	1058	vec.sfv_off = offset;
653	vec.sfv_len = count;	1059	vec.sfv_len = count;
654		1060
655	res = sendfilev (ofd, &vec, 1, &sbytes);	1061	res = sendfilev (ofd, &vec, 1, &sbytes);
656		1062
657	if (res < 0 && sbytes)	1063	if (res < 0 && sbytes)
658	res = sbytes;	1064	res = sbytes;
659	}
660		1065
661	# endif	1066	# endif
		1067
		1068	#elif defined (_WIN32) && 0
		1069	/* does not work, just for documentation of what would need to be done */
		1070	/* actually, cannot be done like this, as TransmitFile changes the file offset, */
		1071	/* libeio guarantees that the file offset does not change, and windows */
		1072	/* has no way to get an independent handle to the same file description */
		1073	HANDLE h = TO_SOCKET (ifd);
		1074	SetFilePointer (h, offset, 0, FILE_BEGIN);
		1075	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
		1076
662	#else	1077	#else
663	res = -1;	1078	res = -1;
664	errno = ENOSYS;	1079	errno = ENOSYS;
665	#endif	1080	#endif
666		1081
		1082	/* we assume sendfile can copy at least 128mb in one go */
		1083	if (res <= 128 * 1024 * 1024)
		1084	{
		1085	if (res > 0)
		1086	written += res;
		1087
		1088	if (written)
		1089	return written;
		1090
		1091	break;
		1092	}
		1093	else
		1094	{
		1095	/* if we requested more, then probably the kernel was lazy */
		1096	written += res;
		1097	offset += res;
		1098	count -= res;
		1099
		1100	if (!count)
		1101	return written;
		1102	}
		1103	}
		1104
667	if (res < 0	1105	if (res < 0
668	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	1106	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		1107	/* BSDs */
		1108	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
		1109	|| errno == ENOTSUP
		1110	#endif
		1111	#ifdef EOPNOTSUPP /* windows */
		1112	|| errno == EOPNOTSUPP /* BSDs */
		1113	#endif
669	#if __solaris	1114	#if __solaris
670	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	1115	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
671	#endif	1116	#endif
672	)	1117	)
673	)	1118	)
…		…
677		1122
678	res = 0;	1123	res = 0;
679		1124
680	while (count)	1125	while (count)
681	{	1126	{
682	ssize_t cnt;	1127	eio_ssize_t cnt;
683		1128
684	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);	1129	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);
685		1130
686	if (cnt <= 0)	1131	if (cnt <= 0)
687	{	1132	{
…		…
699		1144
700	offset += cnt;	1145	offset += cnt;
701	res += cnt;	1146	res += cnt;
702	count -= cnt;	1147	count -= cnt;
703	}	1148	}
		1149
		1150	FUBd;
704	}	1151	}
705		1152
706	return res;	1153	return res;
707	}	1154	}
708		1155
		1156	#ifdef PAGESIZE
		1157	# define eio_pagesize() PAGESIZE
		1158	#else
		1159	static intptr_t
		1160	eio_pagesize (void)
		1161	{
		1162	static intptr_t page;
		1163
		1164	if (!page)
		1165	page = sysconf (_SC_PAGESIZE);
		1166
		1167	return page;
		1168	}
		1169	#endif
		1170
		1171	static void
		1172	eio_page_align (void **addr, size_t *length)
		1173	{
		1174	intptr_t mask = eio_pagesize () - 1;
		1175
		1176	/* round down addr */
		1177	intptr_t adj = mask & (intptr_t)*addr;
		1178
		1179	*addr = (void *)((intptr_t)*addr - adj);
		1180	*length += adj;
		1181
		1182	/* round up length */
		1183	*length = (*length + mask) & ~mask;
		1184	}
		1185
		1186	#if !_POSIX_MEMLOCK
		1187	# define eio__mlockall(a) EIO_ENOSYS ()
		1188	#else
		1189
		1190	static int
		1191	eio__mlockall (int flags)
		1192	{
		1193	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1194	extern int mallopt (int, int);
		1195	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1196	#endif
		1197
		1198	if (EIO_MCL_CURRENT != MCL_CURRENT
		1199	|| EIO_MCL_FUTURE != MCL_FUTURE)
		1200	{
		1201	flags = 0
		1202	| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
		1203	| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
		1204	}
		1205
		1206	return mlockall (flags);
		1207	}
		1208	#endif
		1209
		1210	#if !_POSIX_MEMLOCK_RANGE
		1211	# define eio__mlock(a,b) EIO_ENOSYS ()
		1212	#else
		1213
		1214	static int
		1215	eio__mlock (void *addr, size_t length)
		1216	{
		1217	eio_page_align (&addr, &length);
		1218
		1219	return mlock (addr, length);
		1220	}
		1221
		1222	#endif
		1223
		1224	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1225	# define eio__msync(a,b,c) EIO_ENOSYS ()
		1226	#else
		1227
		1228	static int
		1229	eio__msync (void *mem, size_t len, int flags)
		1230	{
		1231	eio_page_align (&mem, &len);
		1232
		1233	if (EIO_MS_ASYNC != MS_SYNC
		1234	|| EIO_MS_INVALIDATE != MS_INVALIDATE
		1235	|| EIO_MS_SYNC != MS_SYNC)
		1236	{
		1237	flags = 0
		1238	| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
		1239	| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
		1240	| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
		1241	}
		1242
		1243	return msync (mem, len, flags);
		1244	}
		1245
		1246	#endif
		1247
		1248	static int
		1249	eio__mtouch (eio_req *req)
		1250	{
		1251	void *mem = req->ptr2;
		1252	size_t len = req->size;
		1253	int flags = req->int1;
		1254
		1255	eio_page_align (&mem, &len);
		1256
		1257	{
		1258	intptr_t addr = (intptr_t)mem;
		1259	intptr_t end = addr + len;
		1260	intptr_t page = eio_pagesize ();
		1261
		1262	if (addr < end)
		1263	if (flags & EIO_MT_MODIFY) /* modify */
		1264	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1265	else
		1266	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1267	}
		1268
		1269	return 0;
		1270	}
		1271
		1272	/*****************************************************************************/
		1273	/* requests implemented outside eio_execute, because they are so large */
		1274
		1275	static void
		1276	eio__realpath (eio_req *req, etp_worker *self)
		1277	{
		1278	char *rel = req->ptr1;
		1279	char *res;
		1280	char *tmp1, *tmp2;
		1281	#if SYMLOOP_MAX > 32
		1282	int symlinks = SYMLOOP_MAX;
		1283	#else
		1284	int symlinks = 32;
		1285	#endif
		1286
		1287	req->result = -1;
		1288
		1289	errno = EINVAL;
		1290	if (!rel)
		1291	return;
		1292
		1293	errno = ENOENT;
		1294	if (!*rel)
		1295	return;
		1296
		1297	if (!req->ptr2)
		1298	{
		1299	X_LOCK (wrklock);
		1300	req->flags |= EIO_FLAG_PTR2_FREE;
		1301	X_UNLOCK (wrklock);
		1302	req->ptr2 = malloc (PATH_MAX * 3);
		1303
		1304	errno = ENOMEM;
		1305	if (!req->ptr2)
		1306	return;
		1307	}
		1308
		1309	res = req->ptr2;
		1310	tmp1 = res + PATH_MAX;
		1311	tmp2 = tmp1 + PATH_MAX;
		1312
		1313	#if 0 /* disabled, the musl way to do things is just too racy */
		1314	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
		1315	/* on linux we may be able to ask the kernel */
		1316	{
		1317	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
		1318
		1319	if (fd >= 0)
		1320	{
		1321	sprintf (tmp1, "/proc/self/fd/%d", fd);
		1322	req->result = readlink (tmp1, res, PATH_MAX);
		1323	close (fd);
		1324
		1325	/* here we should probably stat the open file and the disk file, to make sure they still match */
		1326
		1327	if (req->result > 0)
		1328	goto done;
		1329	}
		1330	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
		1331	return;
		1332	}
		1333	#endif
		1334	#endif
		1335
		1336	if (*rel != '/')
		1337	{
		1338	if (!getcwd (res, PATH_MAX))
		1339	return;
		1340
		1341	if (res [1]) /* only use if not / */
		1342	res += strlen (res);
		1343	}
		1344
		1345	while (*rel)
		1346	{
		1347	eio_ssize_t len, linklen;
		1348	char *beg = rel;
		1349
		1350	while (*rel && *rel != '/')
		1351	++rel;
		1352
		1353	len = rel - beg;
		1354
		1355	if (!len) /* skip slashes */
		1356	{
		1357	++rel;
		1358	continue;
		1359	}
		1360
		1361	if (beg [0] == '.')
		1362	{
		1363	if (len == 1)
		1364	continue; /* . - nop */
		1365
		1366	if (beg [1] == '.' && len == 2)
		1367	{
		1368	/* .. - back up one component, if possible */
		1369
		1370	while (res != req->ptr2)
		1371	if (*--res == '/')
		1372	break;
		1373
		1374	continue;
		1375	}
		1376	}
		1377
		1378	errno = ENAMETOOLONG;
		1379	if (res + 1 + len + 1 >= tmp1)
		1380	return;
		1381
		1382	/* copy one component */
		1383	*res = '/';
		1384	memcpy (res + 1, beg, len);
		1385
		1386	/* zero-terminate, for readlink */
		1387	res [len + 1] = 0;
		1388
		1389	/* now check if it's a symlink */
		1390	linklen = readlink (req->ptr2, tmp1, PATH_MAX);
		1391
		1392	if (linklen < 0)
		1393	{
		1394	if (errno != EINVAL)
		1395	return;
		1396
		1397	/* it's a normal directory. hopefully */
		1398	res += len + 1;
		1399	}
		1400	else
		1401	{
		1402	/* yay, it was a symlink - build new path in tmp2 */
		1403	int rellen = strlen (rel);
		1404
		1405	errno = ENAMETOOLONG;
		1406	if (linklen + 1 + rellen >= PATH_MAX)
		1407	return;
		1408
		1409	errno = ELOOP;
		1410	if (!--symlinks)
		1411	return;
		1412
		1413	if (*tmp1 == '/')
		1414	res = req->ptr2; /* symlink resolves to an absolute path */
		1415
		1416	/* we need to be careful, as rel might point into tmp2 already */
		1417	memmove (tmp2 + linklen + 1, rel, rellen + 1);
		1418	tmp2 [linklen] = '/';
		1419	memcpy (tmp2, tmp1, linklen);
		1420
		1421	rel = tmp2;
		1422	}
		1423	}
		1424
		1425	/* special case for the lone root path */
		1426	if (res == req->ptr2)
		1427	*res++ = '/';
		1428
		1429	req->result = res - (char *)req->ptr2;
		1430
		1431	done:
		1432	req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */
		1433	}
		1434
		1435	static signed char
		1436	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
		1437	{
		1438	return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
		1439	: a->inode < b->inode ? -1
		1440	: a->inode > b->inode ? 1
		1441	: 0;
		1442	}
		1443
		1444	#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
		1445
		1446	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
		1447	#define EIO_SORT_FAST 60 /* when to only use insertion sort */
		1448
		1449	static void
		1450	eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
		1451	{
		1452	unsigned char bits [9 + sizeof (eio_ino_t) * 8];
		1453	unsigned char *bit = bits;
		1454
		1455	assert (CHAR_BIT == 8);
		1456	assert (sizeof (eio_dirent) * 8 < 256);
		1457	assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
		1458	assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */
		1459
		1460	if (size <= EIO_SORT_FAST)
		1461	return;
		1462
		1463	/* first prepare an array of bits to test in our radix sort */
		1464	/* try to take endianness into account, as well as differences in eio_ino_t sizes */
		1465	/* inode_bits must contain all inodes ORed together */
		1466	/* which is used to skip bits that are 0 everywhere, which is very common */
		1467	{
		1468	eio_ino_t endianness;
		1469	int i, j;
		1470
		1471	/* we store the byte offset of byte n into byte n of "endianness" */
		1472	for (i = 0; i < sizeof (eio_ino_t); ++i)
		1473	((unsigned char *)&endianness)[i] = i;
		1474
		1475	*bit++ = 0;
		1476
		1477	for (i = 0; i < sizeof (eio_ino_t); ++i)
		1478	{
		1479	/* shifting off the byte offsets out of "endianness" */
		1480	int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
		1481	endianness >>= 8;
		1482
		1483	for (j = 0; j < 8; ++j)
		1484	if (inode_bits & (((eio_ino_t)1) << (i * 8 + j)))
		1485	*bit++ = offs + j;
		1486	}
		1487
		1488	for (j = 0; j < 8; ++j)
		1489	if (score_bits & (1 << j))
		1490	*bit++ = offsetof (eio_dirent, score) * 8 + j;
		1491	}
		1492
		1493	/* now actually do the sorting (a variant of MSD radix sort) */
		1494	{
		1495	eio_dirent *base_stk [9 + sizeof (eio_ino_t) * 8], *base;
		1496	eio_dirent *end_stk [9 + sizeof (eio_ino_t) * 8], *end;
		1497	unsigned char *bit_stk [9 + sizeof (eio_ino_t) * 8];
		1498	int stk_idx = 0;
		1499
		1500	base_stk [stk_idx] = dents;
		1501	end_stk [stk_idx] = dents + size;
		1502	bit_stk [stk_idx] = bit - 1;
		1503
		1504	do
		1505	{
		1506	base = base_stk [stk_idx];
		1507	end = end_stk [stk_idx];
		1508	bit = bit_stk [stk_idx];
		1509
		1510	for (;;)
		1511	{
		1512	unsigned char O = *bit >> 3;
		1513	unsigned char M = 1 << (*bit & 7);
		1514
		1515	eio_dirent *a = base;
		1516	eio_dirent *b = end;
		1517
		1518	if (b - a < EIO_SORT_CUTOFF)
		1519	break;
		1520
		1521	/* now bit-partition the array on the bit */
		1522	/* this ugly asymmetric loop seems to perform much better than typical */
		1523	/* partition algos found in the literature */
		1524	do
		1525	if (!(((unsigned char *)a)[O] & M))
		1526	++a;
		1527	else if (!(((unsigned char *)--b)[O] & M))
		1528	{
		1529	eio_dirent tmp = *a; *a = *b; *b = tmp;
		1530	++a;
		1531	}
		1532	while (b > a);
		1533
		1534	/* next bit, or stop, if no bits left in this path */
		1535	if (!*--bit)
		1536	break;
		1537
		1538	base_stk [stk_idx] = a;
		1539	end_stk [stk_idx] = end;
		1540	bit_stk [stk_idx] = bit;
		1541	++stk_idx;
		1542
		1543	end = a;
		1544	}
		1545	}
		1546	while (stk_idx--);
		1547	}
		1548	}
		1549
		1550	static void
		1551	eio_dent_insertion_sort (eio_dirent *dents, int size)
		1552	{
		1553	/* first move the smallest element to the front, to act as a sentinel */
		1554	{
		1555	int i;
		1556	eio_dirent *min = dents;
		1557
		1558	/* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
		1559	for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
		1560	if (EIO_DENT_CMP (dents [i], <, *min))
		1561	min = &dents [i];
		1562
		1563	/* swap elements 0 and j (minimum) */
		1564	{
		1565	eio_dirent tmp = *dents; *dents = *min; *min = tmp;
		1566	}
		1567	}
		1568
		1569	/* then do standard insertion sort, assuming that all elements are >= dents [0] */
		1570	{
		1571	eio_dirent *i, *j;
		1572
		1573	for (i = dents + 1; i < dents + size; ++i)
		1574	{
		1575	eio_dirent value = *i;
		1576
		1577	for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
		1578	j [1] = j [0];
		1579
		1580	j [1] = value;
		1581	}
		1582	}
		1583	}
		1584
		1585	static void
		1586	eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
		1587	{
		1588	if (size <= 1)
		1589	return; /* our insertion sort relies on size > 0 */
		1590
		1591	/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
		1592	/* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
		1593	eio_dent_radix_sort (dents, size, score_bits, inode_bits);
		1594
		1595	/* use an insertion sort at the end, or for small arrays, */
		1596	/* as insertion sort is more efficient for small partitions */
		1597	eio_dent_insertion_sort (dents, size);
		1598	}
		1599
709	/* read a full directory */	1600	/* read a full directory */
		1601	static void
710	static void scandir_ (eio_req *req, worker *self)	1602	eio__scandir (eio_req *req, etp_worker *self)
711	{	1603	{
		1604	char *name, *names;
		1605	int namesalloc = 4096 - sizeof (void *) * 4;
		1606	int namesoffs = 0;
		1607	int flags = req->int1;
		1608	eio_dirent *dents = 0;
		1609	int dentalloc = 128;
		1610	int dentoffs = 0;
		1611	eio_ino_t inode_bits = 0;
		1612	#ifdef _WIN32
		1613	HANDLE dirp;
		1614	WIN32_FIND_DATA entp;
		1615	#else
712	DIR *dirp;	1616	DIR *dirp;
713	union
714	{
715	EIO_STRUCT_DIRENT d;
716	char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1];
717	} *u;
718	EIO_STRUCT_DIRENT *entp;	1617	EIO_STRUCT_DIRENT *entp;
719	char *name, *names;	1618	#endif
720	int memlen = 4096;
721	int memofs = 0;
722	int res = 0;
723		1619
724	X_LOCK (wrklock);	1620	req->result = -1;
		1621
		1622	if (!(flags & EIO_READDIR_DENTS))
		1623	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
		1624
		1625	#ifdef _WIN32
		1626	{
		1627	int len = strlen ((const char *)req->ptr1);
		1628	char *path = malloc (MAX_PATH);
		1629	const char *fmt;
		1630
		1631	if (!len)
		1632	fmt = "./*";
		1633	else if (((const char *)req->ptr1)[len - 1] == '/' || ((const char *)req->ptr1)[len - 1] == '\\')
		1634	fmt = "%s*";
		1635	else
		1636	fmt = "%s/*";
		1637
		1638	_snprintf (path, MAX_PATH, fmt, (const char *)req->ptr1);
		1639	dirp = FindFirstFile (path, &entp);
		1640	free (path);
		1641
		1642	if (dirp == INVALID_HANDLE_VALUE)
		1643	{
		1644	dirp = 0;
		1645
		1646	switch (GetLastError ())
		1647	{
		1648	case ERROR_FILE_NOT_FOUND:
		1649	req->result = 0;
		1650	break;
		1651
		1652	case ERROR_INVALID_NAME:
		1653	case ERROR_PATH_NOT_FOUND:
		1654	case ERROR_NO_MORE_FILES:
		1655	errno = ENOENT;
		1656	break;
		1657
		1658	case ERROR_NOT_ENOUGH_MEMORY:
		1659	errno = ENOMEM;
		1660	break;
		1661
		1662	default:
		1663	errno = EINVAL;
		1664	break;
		1665	}
		1666	}
		1667	}
		1668	#else
725	self->dirp = dirp = opendir (req->ptr1);	1669	dirp = opendir (req->ptr1);
726	self->dbuf = u = malloc (sizeof (*u));	1670	#endif
		1671
727	req->flags |= EIO_FLAG_PTR2_FREE;	1672	if (req->flags & EIO_FLAG_PTR1_FREE)
		1673	free (req->ptr1);
		1674
		1675	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
		1676	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
728	req->ptr2 = names = malloc (memlen);	1677	req->ptr2 = names = malloc (namesalloc);
729	X_UNLOCK (wrklock);
730		1678
731	if (dirp && u && names)	1679	if (dirp && names && (!flags || dents))
732	for (;;)	1680	for (;;)
733	{	1681	{
		1682	int done;
		1683
		1684	#ifdef _WIN32
		1685	done = !dirp;
		1686	#else
734	errno = 0;	1687	errno = 0;
735	readdir_r (dirp, &u->d, &entp);	1688	entp = readdir (dirp);
		1689	done = !entp;
		1690	#endif
736		1691
737	if (!entp)	1692	if (done)
		1693	{
		1694	#ifndef _WIN32
		1695	int old_errno = errno;
		1696	closedir (dirp);
		1697	errno = old_errno;
		1698
		1699	if (errno)
		1700	break;
		1701	#endif
		1702
		1703	/* sort etc. */
		1704	req->int1 = flags;
		1705	req->result = dentoffs;
		1706
		1707	if (flags & EIO_READDIR_STAT_ORDER)
		1708	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
		1709	else if (flags & EIO_READDIR_DIRS_FIRST)
		1710	if (flags & EIO_READDIR_FOUND_UNKNOWN)
		1711	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
		1712	else
		1713	{
		1714	/* in this case, all is known, and we just put dirs first and sort them */
		1715	eio_dirent *oth = dents + dentoffs;
		1716	eio_dirent *dir = dents;
		1717
		1718	/* now partition dirs to the front, and non-dirs to the back */
		1719	/* by walking from both sides and swapping if necessary */
		1720	while (oth > dir)
		1721	{
		1722	if (dir->type == EIO_DT_DIR)
		1723	++dir;
		1724	else if ((--oth)->type == EIO_DT_DIR)
		1725	{
		1726	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
		1727
		1728	++dir;
		1729	}
		1730	}
		1731
		1732	/* now sort the dirs only (dirs all have the same score) */
		1733	eio_dent_sort (dents, dir - dents, 0, inode_bits);
		1734	}
		1735
738	break;	1736	break;
		1737	}
739		1738
740	name = entp->d_name;	1739	/* now add the entry to our list(s) */
		1740	name = D_NAME (entp);
741		1741
		1742	/* skip . and .. entries */
742	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1743	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
743	{	1744	{
744	int len = strlen (name) + 1;	1745	int len = D_NAMLEN (entp) + 1;
745		1746
746	res++;	1747	while (ecb_expect_false (namesoffs + len > namesalloc))
747
748	while (memofs + len > memlen)
749	{	1748	{
750	memlen *= 2;	1749	namesalloc *= 2;
751	X_LOCK (wrklock);
752	req->ptr2 = names = realloc (names, memlen);	1750	req->ptr2 = names = realloc (names, namesalloc);
753	X_UNLOCK (wrklock);
754		1751
755	if (!names)	1752	if (!names)
756	break;	1753	break;
757	}	1754	}
758		1755
759	memcpy (names + memofs, name, len);	1756	memcpy (names + namesoffs, name, len);
		1757
		1758	if (dents)
		1759	{
		1760	struct eio_dirent *ent;
		1761
		1762	if (ecb_expect_false (dentoffs == dentalloc))
		1763	{
		1764	dentalloc *= 2;
		1765	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
		1766
		1767	if (!dents)
		1768	break;
		1769	}
		1770
		1771	ent = dents + dentoffs;
		1772
		1773	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
		1774	ent->namelen = len - 1;
		1775	ent->inode = D_INO (entp);
		1776
		1777	inode_bits |= ent->inode;
		1778
		1779	switch (D_TYPE (entp))
		1780	{
		1781	default:
		1782	ent->type = EIO_DT_UNKNOWN;
		1783	flags |= EIO_READDIR_FOUND_UNKNOWN;
		1784	break;
		1785
		1786	#ifdef DT_FIFO
		1787	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
		1788	#endif
		1789	#ifdef DT_CHR
		1790	case DT_CHR: ent->type = EIO_DT_CHR; break;
		1791	#endif
		1792	#ifdef DT_MPC
		1793	case DT_MPC: ent->type = EIO_DT_MPC; break;
		1794	#endif
		1795	#ifdef DT_DIR
		1796	case DT_DIR: ent->type = EIO_DT_DIR; break;
		1797	#endif
		1798	#ifdef DT_NAM
		1799	case DT_NAM: ent->type = EIO_DT_NAM; break;
		1800	#endif
		1801	#ifdef DT_BLK
		1802	case DT_BLK: ent->type = EIO_DT_BLK; break;
		1803	#endif
		1804	#ifdef DT_MPB
		1805	case DT_MPB: ent->type = EIO_DT_MPB; break;
		1806	#endif
		1807	#ifdef DT_REG
		1808	case DT_REG: ent->type = EIO_DT_REG; break;
		1809	#endif
		1810	#ifdef DT_NWK
		1811	case DT_NWK: ent->type = EIO_DT_NWK; break;
		1812	#endif
		1813	#ifdef DT_CMP
		1814	case DT_CMP: ent->type = EIO_DT_CMP; break;
		1815	#endif
		1816	#ifdef DT_LNK
		1817	case DT_LNK: ent->type = EIO_DT_LNK; break;
		1818	#endif
		1819	#ifdef DT_SOCK
		1820	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
		1821	#endif
		1822	#ifdef DT_DOOR
		1823	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
		1824	#endif
		1825	#ifdef DT_WHT
		1826	case DT_WHT: ent->type = EIO_DT_WHT; break;
		1827	#endif
		1828	}
		1829
		1830	ent->score = 7;
		1831
		1832	if (flags & EIO_READDIR_DIRS_FIRST)
		1833	{
		1834	if (ent->type == EIO_DT_UNKNOWN)
		1835	{
		1836	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
		1837	ent->score = 1;
		1838	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
		1839	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
		1840	}
		1841	else if (ent->type == EIO_DT_DIR)
		1842	ent->score = 0;
		1843	}
		1844	}
		1845
760	memofs += len;	1846	namesoffs += len;
		1847	++dentoffs;
761	}	1848	}
		1849
		1850	if (EIO_CANCELLED (req))
		1851	{
		1852	errno = ECANCELED;
		1853	break;
		1854	}
		1855
		1856	#ifdef _WIN32
		1857	if (!FindNextFile (dirp, &entp))
		1858	{
		1859	FindClose (dirp);
		1860	dirp = 0;
		1861	}
		1862	#endif
762	}	1863	}
763
764	if (errno)
765	res = -1;
766
767	req->result = res;
768	}	1864	}
769		1865
770	/*****************************************************************************/	1866	/*****************************************************************************/
771		1867
772	#define ALLOC(len) \	1868	#define ALLOC(len) \
…		…
782	req->result = -1; \	1878	req->result = -1; \
783	break; \	1879	break; \
784	} \	1880	} \
785	}	1881	}
786		1882
787	X_THREAD_PROC (eio_proc)	1883	X_THREAD_PROC (etp_proc)
788	{	1884	{
789	eio_req *req;	1885	ETP_REQ *req;
790	struct timespec ts;	1886	struct timespec ts;
791	worker *self = (worker *)thr_arg;	1887	etp_worker *self = (etp_worker *)thr_arg;
792		1888
793	/* try to distribute timeouts somewhat randomly */	1889	/* try to distribute timeouts somewhat evenly */
794	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1890	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
795		1891
796	for (;;)	1892	for (;;)
797	{	1893	{
798	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1894	ts.tv_sec = 0;
799		1895
800	X_LOCK (reqlock);	1896	X_LOCK (reqlock);
801		1897
802	for (;;)	1898	for (;;)
803	{	1899	{
804	self->req = req = reqq_shift (&req_queue);	1900	self->req = req = reqq_shift (&req_queue);
805		1901
806	if (req)	1902	if (req)
807	break;	1903	break;
808		1904
		1905	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
		1906	{
		1907	X_UNLOCK (reqlock);
		1908	X_LOCK (wrklock);
		1909	--started;
		1910	X_UNLOCK (wrklock);
		1911	goto quit;
		1912	}
		1913
809	++idle;	1914	++idle;
810		1915
811	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1916	if (idle <= max_idle)
		1917	/* we are allowed to idle, so do so without any timeout */
		1918	X_COND_WAIT (reqwait, reqlock);
		1919	else
812	{	1920	{
813	if (idle > max_idle)	1921	/* initialise timeout once */
814	{	1922	if (!ts.tv_sec)
815	--idle;	1923	ts.tv_sec = time (0) + idle_timeout;
816	X_UNLOCK (reqlock);
817	X_LOCK (wrklock);
818	--started;
819	X_UNLOCK (wrklock);
820	goto quit;
821	}
822		1924
823	/* we are allowed to idle, so do so without any timeout */
824	X_COND_WAIT (reqwait, reqlock);	1925	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
825	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1926	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
826	}	1927	}
827		1928
828	--idle;	1929	--idle;
829	}	1930	}
830		1931
831	--nready;	1932	--nready;
832		1933
833	X_UNLOCK (reqlock);	1934	X_UNLOCK (reqlock);
834		1935
835	errno = 0; /* strictly unnecessary */
836
837	if (!EIO_CANCELLED (req))
838	switch (req->type)	1936	if (req->type < 0)
839	{
840	case EIO_READ: ALLOC (req->size);
841	req->result = req->offs >= 0
842	? pread (req->int1, req->ptr2, req->size, req->offs)
843	: read (req->int1, req->ptr2, req->size); break;
844	case EIO_WRITE: req->result = req->offs >= 0
845	? pwrite (req->int1, req->ptr2, req->size, req->offs)
846	: write (req->int1, req->ptr2, req->size); break;
847
848	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
849	case EIO_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
850
851	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
852	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
853	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
854	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
855	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
856	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
857
858	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
859	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
860	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
861	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
862	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
863	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
864
865	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
866	case EIO_CLOSE: req->result = close (req->int1); break;
867	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
868	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
869	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
870	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
871	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
872	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
873	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
874	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
875
876	case EIO_READLINK: ALLOC (NAME_MAX);
877	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
878
879	case EIO_SYNC: req->result = 0; sync (); break;
880	case EIO_FSYNC: req->result = fsync (req->int1); break;
881	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
882
883	case EIO_READDIR: scandir_ (req, self); break;
884
885	case EIO_BUSY:
886	#ifdef _WIN32
887	Sleep (req->nv1 * 1000.);
888	#else
889	{
890	struct timeval tv;
891
892	tv.tv_sec = req->nv1;
893	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
894
895	req->result = select (0, 0, 0, 0, &tv);
896	}
897	#endif
898	break;
899
900	case EIO_UTIME:
901	case EIO_FUTIME:
902	{
903	struct timeval tv[2];
904	struct timeval *times;
905
906	if (req->nv1 != -1. || req->nv2 != -1.)
907	{
908	tv[0].tv_sec = req->nv1;
909	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
910	tv[1].tv_sec = req->nv2;
911	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
912
913	times = tv;
914	}
915	else
916	times = 0;
917
918
919	req->result = req->type == EIO_FUTIME
920	? futimes (req->int1, times)
921	: utimes (req->ptr1, times);
922	}
923
924	case EIO_GROUP:
925	case EIO_NOP:
926	break;
927
928	case EIO_QUIT:
929	goto quit;	1937	goto quit;
930		1938
931	default:	1939	ETP_EXECUTE (self, req);
932	req->result = -1;
933	break;
934	}
935
936	req->errorno = errno;
937		1940
938	X_LOCK (reslock);	1941	X_LOCK (reslock);
939		1942
940	++npending;	1943	++npending;
941		1944
942	if (!reqq_push (&res_queue, req) && want_poll_cb)	1945	if (!reqq_push (&res_queue, req) && want_poll_cb)
943	want_poll_cb ();	1946	want_poll_cb ();
944		1947
945	self->req = 0;	1948	self->req = 0;
946	worker_clear (self);	1949	etp_worker_clear (self);
947		1950
948	X_UNLOCK (reslock);	1951	X_UNLOCK (reslock);
949	}	1952	}
950		1953
951	quit:	1954	quit:
952	X_LOCK (wrklock);	1955	X_LOCK (wrklock);
953	worker_free (self);	1956	etp_worker_free (self);
954	X_UNLOCK (wrklock);	1957	X_UNLOCK (wrklock);
955		1958
956	return 0;	1959	return 0;
957	}	1960	}
958		1961
959	/*****************************************************************************/	1962	/*****************************************************************************/
960		1963
961	static void eio_atfork_prepare (void)	1964	int ecb_cold
		1965	eio_init (void (*want_poll)(void), void (*done_poll)(void))
962	{	1966	{
963	X_LOCK (wrklock);
964	X_LOCK (reqlock);
965	X_LOCK (reslock);
966	#if !HAVE_PREADWRITE	1967	#if !HAVE_PREADWRITE
967	X_LOCK (preadwritelock);
968	#endif
969	#if !HAVE_READDIR_R
970	X_LOCK (readdirlock);
971	#endif
972	}
973
974	static void eio_atfork_parent (void)
975	{
976	#if !HAVE_READDIR_R
977	X_UNLOCK (readdirlock);
978	#endif
979	#if !HAVE_PREADWRITE
980	X_UNLOCK (preadwritelock);
981	#endif
982	X_UNLOCK (reslock);
983	X_UNLOCK (reqlock);
984	X_UNLOCK (wrklock);
985	}
986
987	static void eio_atfork_child (void)
988	{
989	eio_req *prv;
990
991	while (prv = reqq_shift (&req_queue))
992	eio_destroy (prv);
993
994	while (prv = reqq_shift (&res_queue))
995	eio_destroy (prv);
996
997	while (wrk_first.next != &wrk_first)
998	{
999	worker *wrk = wrk_first.next;
1000
1001	if (wrk->req)
1002	eio_destroy (wrk->req);
1003
1004	worker_clear (wrk);
1005	worker_free (wrk);
1006	}
1007
1008	started = 0;
1009	idle = 0;
1010	nreqs = 0;
1011	nready = 0;
1012	npending = 0;
1013
1014	eio_atfork_parent ();
1015	}
1016
1017	int eio_init (void (*want_poll)(void), void (*done_poll)(void))
1018	{
1019	want_poll_cb = want_poll;
1020	done_poll_cb = done_poll;
1021
1022	#ifdef _WIN32
1023	X_MUTEX_CHECK (wrklock);
1024	X_MUTEX_CHECK (reslock);
1025	X_MUTEX_CHECK (reqlock);
1026	X_MUTEX_CHECK (reqwait);
1027	X_MUTEX_CHECK (preadwritelock);	1968	X_MUTEX_CREATE (preadwritelock);
1028	X_MUTEX_CHECK (readdirlock);
1029
1030	X_COND_CHECK (reqwait);
1031	#endif	1969	#endif
1032		1970
1033	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);	1971	return etp_init (want_poll, done_poll);
1034	}	1972	}
1035		1973
		1974	ecb_inline void
1036	static void eio_api_destroy (eio_req *req)	1975	eio_api_destroy (eio_req *req)
1037	{	1976	{
1038	free (req);	1977	free (req);
1039	}	1978	}
1040		1979
1041	#define REQ(rtype) \	1980	#define REQ(rtype) \
…		…
1043	\	1982	\
1044	req = (eio_req *)calloc (1, sizeof *req); \	1983	req = (eio_req *)calloc (1, sizeof *req); \
1045	if (!req) \	1984	if (!req) \
1046	return 0; \	1985	return 0; \
1047	\	1986	\
1048	req->type = EIO_ ## rtype; \	1987	req->type = rtype; \
1049	req->pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \	1988	req->pri = pri; \
1050	req->finish = cb; \	1989	req->finish = cb; \
		1990	req->data = data; \
1051	req->destroy = eio_api_destroy;	1991	req->destroy = eio_api_destroy;
1052		1992
1053	#define SEND eio_submit (req); return req	1993	#define SEND eio_submit (req); return req
1054		1994
1055	#define PATH (void)0	1995	#define PATH \
		1996	req->flags |= EIO_FLAG_PTR1_FREE; \
		1997	req->ptr1 = strdup (path); \
		1998	if (!req->ptr1) \
		1999	{ \
		2000	eio_api_destroy (req); \
		2001	return 0; \
		2002	}
1056		2003
		2004	static void
		2005	eio_execute (etp_worker *self, eio_req *req)
		2006	{
		2007	if (ecb_expect_false (EIO_CANCELLED (req)))
		2008	{
		2009	req->result = -1;
		2010	req->errorno = ECANCELED;
		2011	return;
		2012	}
		2013
		2014	switch (req->type)
		2015	{
		2016	case EIO_READ: ALLOC (req->size);
		2017	req->result = req->offs >= 0
		2018	? pread (req->int1, req->ptr2, req->size, req->offs)
		2019	: read (req->int1, req->ptr2, req->size); break;
		2020	case EIO_WRITE: req->result = req->offs >= 0
		2021	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		2022	: write (req->int1, req->ptr2, req->size); break;
		2023
		2024	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		2025	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break;
		2026
		2027	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		2028	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		2029	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		2030	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		2031	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		2032	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
		2033
		2034	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		2035	req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		2036	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		2037	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		2038
		2039	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		2040	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		2041	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
		2042	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
		2043	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		2044	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		2045
		2046	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
		2047	case EIO_CLOSE: req->result = close (req->int1); break;
		2048	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		2049	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		2050	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		2051	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		2052	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		2053	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		2054	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		2055	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
		2056
		2057	case EIO_REALPATH: eio__realpath (req, self); break;
		2058
		2059	case EIO_READLINK: ALLOC (PATH_MAX);
		2060	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
		2061
		2062	case EIO_SYNC: req->result = 0; sync (); break;
		2063	case EIO_FSYNC: req->result = fsync (req->int1); break;
		2064	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		2065	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
		2066	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
		2067	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
		2068	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
		2069	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		2070	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
		2071
		2072	case EIO_READDIR: eio__scandir (req, self); break;
		2073
		2074	case EIO_BUSY:
		2075	#ifdef _WIN32
		2076	Sleep (req->nv1 * 1e3);
		2077	#else
		2078	{
		2079	struct timeval tv;
		2080
		2081	tv.tv_sec = req->nv1;
		2082	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6;
		2083
		2084	req->result = select (0, 0, 0, 0, &tv);
		2085	}
		2086	#endif
		2087	break;
		2088
		2089	case EIO_UTIME:
		2090	case EIO_FUTIME:
		2091	{
		2092	struct timeval tv[2];
		2093	struct timeval *times;
		2094
		2095	if (req->nv1 != -1. || req->nv2 != -1.)
		2096	{
		2097	tv[0].tv_sec = req->nv1;
		2098	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		2099	tv[1].tv_sec = req->nv2;
		2100	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		2101
		2102	times = tv;
		2103	}
		2104	else
		2105	times = 0;
		2106
		2107	req->result = req->type == EIO_FUTIME
		2108	? futimes (req->int1, times)
		2109	: utimes (req->ptr1, times);
		2110	}
		2111	break;
		2112
		2113	case EIO_GROUP:
		2114	abort (); /* handled in eio_request */
		2115
		2116	case EIO_NOP:
		2117	req->result = 0;
		2118	break;
		2119
		2120	case EIO_CUSTOM:
		2121	req->feed (req);
		2122	break;
		2123
		2124	default:
		2125	errno = ENOSYS;
		2126	req->result = -1;
		2127	break;
		2128	}
		2129
		2130	req->errorno = errno;
		2131	}
		2132
		2133	#ifndef EIO_NO_WRAPPERS
		2134
		2135	eio_req *eio_nop (int pri, eio_cb cb, void *data)
		2136	{
		2137	REQ (EIO_NOP); SEND;
		2138	}
		2139
		2140	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
		2141	{
		2142	REQ (EIO_BUSY); req->nv1 = delay; SEND;
		2143	}
		2144
1057	eio_req *eio_fsync (int fd, eio_cb cb)	2145	eio_req *eio_sync (int pri, eio_cb cb, void *data)
1058	{	2146	{
		2147	REQ (EIO_SYNC); SEND;
		2148	}
		2149
		2150	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		2151	{
1059	REQ (FSYNC); req->int1 = fd; SEND;	2152	REQ (EIO_FSYNC); req->int1 = fd; SEND;
1060	}	2153	}
1061		2154
		2155	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2156	{
		2157	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2158	}
		2159
		2160	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2161	{
		2162	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2163	}
		2164
		2165	eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data)
		2166	{
		2167	REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND;
		2168	}
		2169
		2170	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
		2171	{
		2172	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
		2173	}
		2174
		2175	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		2176	{
		2177	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		2178	}
		2179
		2180	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
		2181	{
		2182	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
		2183	}
		2184
1062	eio_req *eio_fdatasync (int fd, eio_cb cb)	2185	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1063	{	2186	{
1064	REQ (FDATASYNC); req->int1 = fd; SEND;	2187	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1065	}	2188	}
1066		2189
		2190	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		2191	{
		2192	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		2193	}
		2194
1067	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb)	2195	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
1068	{	2196	{
1069	REQ (READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;	2197	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
1070	}	2198	}
1071		2199
1072	eio_req *eio_read (int fd, off_t offset, size_t length, void *data, eio_cb cb)	2200	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1073	{	2201	{
1074	REQ (READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	2202	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1075	}	2203	}
1076		2204
1077	eio_req *eio_write (int fd, off_t offset, size_t length, void *data, eio_cb cb)	2205	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1078	{	2206	{
1079	REQ (WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	2207	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1080	}	2208	}
1081		2209
1082	eio_req *eio_fstat (int fd, eio_cb cb)	2210	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
1083	{	2211	{
1084	REQ (FSTAT); req->int1 = fd; SEND;	2212	REQ (EIO_FSTAT); req->int1 = fd; SEND;
1085	}	2213	}
1086		2214
		2215	eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data)
		2216	{
		2217	REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
		2218	}
		2219
1087	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb)	2220	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
1088	{	2221	{
1089	REQ (FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;	2222	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
1090	}	2223	}
1091		2224
1092	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb)	2225	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
1093	{	2226	{
1094	REQ (FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;	2227	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
1095	}	2228	}
1096		2229
1097	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb)	2230	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
1098	{	2231	{
1099	REQ (FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;	2232	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1100	}	2233	}
1101		2234
1102	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb)	2235	eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1103	{	2236	{
1104	REQ (FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2237	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1105	}	2238	}
1106		2239
1107	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb)	2240	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
1108	{	2241	{
1109	REQ (DUP2); req->int1 = fd; req->int2 = fd2; SEND;	2242	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
1110	}	2243	}
1111		2244
1112	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb)	2245	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
1113	{	2246	{
1114	REQ (SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;	2247	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
1115	}	2248	}
1116		2249
1117	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb)	2250	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
1118	{	2251	{
1119	REQ (OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;	2252	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
1120	}	2253	}
1121		2254
1122	eio_req *eio_readlink (const char *path, eio_cb cb)
1123	{
1124	REQ (READLINK); PATH; SEND;
1125	}
1126
1127	eio_req *eio_stat (const char *path, eio_cb cb)
1128	{
1129	REQ (STAT); PATH; SEND;
1130	}
1131
1132	eio_req *eio_lstat (const char *path, eio_cb cb)
1133	{
1134	REQ (LSTAT); PATH; SEND;
1135	}
1136
1137	eio_req *eio_utime (const char *path, double atime, double mtime, eio_cb cb)	2255	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
1138	{	2256	{
1139	REQ (UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;	2257	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
1140	}	2258	}
1141		2259
1142	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb)	2260	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
1143	{	2261	{
1144	REQ (TRUNCATE); PATH; req->offs = offset; SEND;	2262	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1145	}	2263	}
1146		2264
1147	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb)	2265	eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
1148	{	2266	{
1149	REQ (CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	2267	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1150	}	2268	}
1151		2269
1152	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb)	2270	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1153	{	2271	{
1154	REQ (CHMOD); PATH; req->int2 = (long)mode; SEND;	2272	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
1155	}	2273	}
1156		2274
1157	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb)	2275	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1158	{	2276	{
1159	REQ (MKDIR); PATH; req->int2 = (long)mode; SEND;	2277	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
1160	}	2278	}
1161		2279
1162	eio_req *eio_unlink (const char *path, eio_cb cb)	2280	static eio_req *
		2281	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
1163	{	2282	{
1164	REQ (UNLINK); PATH; SEND;
1165	}
1166
1167	eio_req *eio_rmdir (const char *path, eio_cb cb)
1168	{
1169	REQ (RMDIR); PATH; SEND;	2283	REQ (type); PATH; SEND;
1170	}	2284	}
1171		2285
		2286	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		2287	{
		2288	return eio__1path (EIO_READLINK, path, pri, cb, data);
		2289	}
		2290
		2291	eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
		2292	{
		2293	return eio__1path (EIO_REALPATH, path, pri, cb, data);
		2294	}
		2295
		2296	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		2297	{
		2298	return eio__1path (EIO_STAT, path, pri, cb, data);
		2299	}
		2300
		2301	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		2302	{
		2303	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		2304	}
		2305
		2306	eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data)
		2307	{
		2308	return eio__1path (EIO_STATVFS, path, pri, cb, data);
		2309	}
		2310
		2311	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		2312	{
		2313	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		2314	}
		2315
1172	eio_req *eio_readdir (const char *path, eio_cb cb)	2316	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
1173	{	2317	{
1174	REQ (READDIR); PATH; SEND;	2318	return eio__1path (EIO_RMDIR, path, pri, cb, data);
1175	}	2319	}
1176		2320
		2321	eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data)
		2322	{
		2323	REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
		2324	}
		2325
1177	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb)	2326	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1178	{	2327	{
1179	REQ (MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND;	2328	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND;
1180	}	2329	}
1181		2330
1182	eio_req *eio_busy (double delay, eio_cb cb)	2331	static eio_req *
		2332	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1183	{	2333	{
1184	REQ (BUSY); req->nv1 = delay; SEND;	2334	REQ (type); PATH;
1185	}
1186		2335
		2336	req->flags |= EIO_FLAG_PTR2_FREE;
		2337	req->ptr2 = strdup (new_path);
		2338	if (!req->ptr2)
		2339	{
		2340	eio_api_destroy (req);
		2341	return 0;
		2342	}
		2343
		2344	SEND;
		2345	}
		2346
		2347	eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2348	{
		2349	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
		2350	}
		2351
		2352	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2353	{
		2354	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
		2355	}
		2356
		2357	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2358	{
		2359	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
		2360	}
		2361
		2362	eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
		2363	{
		2364	REQ (EIO_CUSTOM); req->feed = execute; SEND;
		2365	}
		2366
		2367	#endif
		2368
1187	eio_req *eio_nop (eio_cb cb)	2369	eio_req *eio_grp (eio_cb cb, void *data)
1188	{	2370	{
		2371	const int pri = EIO_PRI_MAX;
		2372
1189	REQ (NOP); SEND;	2373	REQ (EIO_GROUP); SEND;
1190	}	2374	}
1191		2375
1192	#undef REQ	2376	#undef REQ
1193	#undef PATH	2377	#undef PATH
1194	#undef SEND	2378	#undef SEND
1195		2379
1196	#if 0	2380	/*****************************************************************************/
		2381	/* grp functions */
1197		2382
1198	void	2383	void
1199	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1200	PROTOTYPE: $$$;$
1201	PPCODE:
1202	{
1203	dREQ;
1204
1205	req->type = EIO_OPEN;
1206	req->sv1 = newSVsv (pathname);
1207	req->ptr1 = SvPVbyte_nolen (req->sv1);
1208	req->int1 = flags;
1209	req->int2 = mode;
1210
1211	EIO_SEND;
1212	}
1213
1214	void
1215	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1216	PROTOTYPE: $;$
1217	ALIAS:
1218	aio_fsync = EIO_FSYNC
1219	aio_fdatasync = EIO_FDATASYNC
1220	PPCODE:
1221	{
1222	dREQ;
1223
1224	req->type = ix;
1225	req->sv1 = newSVsv (fh);
1226	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1227
1228	EIO_SEND (req);
1229	}
1230
1231	void
1232	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1233	PROTOTYPE: $;$
1234	PPCODE:
1235	{
1236	dREQ;
1237
1238	req->type = EIO_CLOSE;
1239	req->sv1 = newSVsv (fh);
1240	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1241
1242	EIO_SEND (req);
1243	}
1244
1245	void
1246	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1247	ALIAS:
1248	aio_read = EIO_READ
1249	aio_write = EIO_WRITE
1250	PROTOTYPE: $$$$$;$
1251	PPCODE:
1252	{
1253	STRLEN svlen;
1254	char *svptr = SvPVbyte (data, svlen);
1255	UV len = SvUV (length);
1256
1257	SvUPGRADE (data, SVt_PV);
1258	SvPOK_on (data);
1259
1260	if (dataoffset < 0)
1261	dataoffset += svlen;
1262
1263	if (dataoffset < 0 || dataoffset > svlen)
1264	croak ("dataoffset outside of data scalar");
1265
1266	if (ix == EIO_WRITE)
1267	{
1268	/* write: check length and adjust. */
1269	if (!SvOK (length) || len + dataoffset > svlen)
1270	len = svlen - dataoffset;
1271	}
1272	else
1273	{
1274	/* read: grow scalar as necessary */
1275	svptr = SvGROW (data, len + dataoffset + 1);
1276	}
1277
1278	if (len < 0)
1279	croak ("length must not be negative");
1280
1281	{
1282	dREQ;
1283
1284	req->type = ix;
1285	req->sv1 = newSVsv (fh);
1286	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1287	: IoOFP (sv_2io (fh)));
1288	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1289	req->size = len;
1290	req->sv2 = SvREFCNT_inc (data);
1291	req->ptr2 = (char *)svptr + dataoffset;
1292	req->stroffset = dataoffset;
1293
1294	if (!SvREADONLY (data))
1295	{
1296	SvREADONLY_on (data);
1297	req->flags |= FLAG_SV2_RO_OFF;
1298	}
1299
1300	EIO_SEND;
1301	}
1302	}
1303
1304	void
1305	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1306	PROTOTYPE: $$;$
1307	PPCODE:
1308	{
1309	SV *data;
1310	dREQ;
1311
1312	data = newSV (NAME_MAX);
1313	SvPOK_on (data);
1314
1315	req->type = EIO_READLINK;
1316	req->sv1 = newSVsv (path);
1317	req->ptr1 = SvPVbyte_nolen (req->sv1);
1318	req->sv2 = data;
1319	req->ptr2 = SvPVbyte_nolen (data);
1320
1321	EIO_SEND;
1322	}
1323
1324	void
1325	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1326	PROTOTYPE: $$$$;$
1327	PPCODE:
1328	{
1329	dREQ;
1330
1331	req->type = EIO_SENDFILE;
1332	req->sv1 = newSVsv (out_fh);
1333	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1334	req->sv2 = newSVsv (in_fh);
1335	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1336	req->offs = SvVAL64 (in_offset);
1337	req->size = length;
1338
1339	EIO_SEND;
1340	}
1341
1342	void
1343	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1344	PROTOTYPE: $$$;$
1345	PPCODE:
1346	{
1347	dREQ;
1348
1349	req->type = EIO_READAHEAD;
1350	req->sv1 = newSVsv (fh);
1351	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1352	req->offs = SvVAL64 (offset);
1353	req->size = length;
1354
1355	EIO_SEND;
1356	}
1357
1358	void
1359	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1360	ALIAS:
1361	aio_stat = EIO_STAT
1362	aio_lstat = EIO_LSTAT
1363	PPCODE:
1364	{
1365	dREQ;
1366
1367	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1368	if (!req->ptr2)
1369	{
1370	req_destroy (req);
1371	croak ("out of memory during aio_stat statdata allocation");
1372	}
1373
1374	req->flags |= FLAG_PTR2_FREE;
1375	req->sv1 = newSVsv (fh_or_path);
1376
1377	if (SvPOK (fh_or_path))
1378	{
1379	req->type = ix;
1380	req->ptr1 = SvPVbyte_nolen (req->sv1);
1381	}
1382	else
1383	{
1384	req->type = EIO_FSTAT;
1385	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1386	}
1387
1388	EIO_SEND;
1389	}
1390
1391	void
1392	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1393	PPCODE:
1394	{
1395	dREQ;
1396
1397	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1398	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1399	req->sv1 = newSVsv (fh_or_path);
1400
1401	if (SvPOK (fh_or_path))
1402	{
1403	req->type = EIO_UTIME;
1404	req->ptr1 = SvPVbyte_nolen (req->sv1);
1405	}
1406	else
1407	{
1408	req->type = EIO_FUTIME;
1409	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1410	}
1411
1412	EIO_SEND;
1413	}
1414
1415	void
1416	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1417	PPCODE:
1418	{
1419	dREQ;
1420
1421	req->sv1 = newSVsv (fh_or_path);
1422	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1423
1424	if (SvPOK (fh_or_path))
1425	{
1426	req->type = EIO_TRUNCATE;
1427	req->ptr1 = SvPVbyte_nolen (req->sv1);
1428	}
1429	else
1430	{
1431	req->type = EIO_FTRUNCATE;
1432	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1433	}
1434
1435	EIO_SEND;
1436	}
1437
1438	void
1439	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1440	ALIAS:
1441	aio_chmod = EIO_CHMOD
1442	aio_fchmod = EIO_FCHMOD
1443	aio_mkdir = EIO_MKDIR
1444	PPCODE:
1445	{
1446	dREQ;
1447
1448	req->type = type;
1449	req->int2 = mode;
1450	req->sv1 = newSVsv (fh_or_path);
1451
1452	if (ix == EIO_FCHMOD)
1453	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1454	else
1455	req->ptr1 = SvPVbyte_nolen (req->sv1);
1456
1457	EIO_SEND;
1458	}
1459
1460	void
1461	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1462	PPCODE:
1463	{
1464	dREQ;
1465
1466	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1467	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1468	req->sv1 = newSVsv (fh_or_path);
1469
1470	if (SvPOK (fh_or_path))
1471	{
1472	req->type = EIO_CHOWN;
1473	req->ptr1 = SvPVbyte_nolen (req->sv1);
1474	}
1475	else
1476	{
1477	req->type = EIO_FCHOWN;
1478	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1479	}
1480
1481	EIO_SEND;
1482	}
1483
1484	void
1485	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1486	ALIAS:
1487	aio_unlink = EIO_UNLINK
1488	aio_rmdir = EIO_RMDIR
1489	aio_readdir = EIO_READDIR
1490	PPCODE:
1491	{
1492	dREQ;
1493
1494	req->type = ix;
1495	req->sv1 = newSVsv (pathname);
1496	req->ptr1 = SvPVbyte_nolen (req->sv1);
1497
1498	EIO_SEND;
1499	}
1500
1501	void
1502	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1503	ALIAS:
1504	aio_link = EIO_LINK
1505	aio_symlink = EIO_SYMLINK
1506	aio_rename = EIO_RENAME
1507	PPCODE:
1508	{
1509	dREQ;
1510
1511	req->type = ix;
1512	req->sv1 = newSVsv (oldpath);
1513	req->ptr1 = SvPVbyte_nolen (req->sv1);
1514	req->sv2 = newSVsv (newpath);
1515	req->ptr2 = SvPVbyte_nolen (req->sv2);
1516
1517	EIO_SEND;
1518	}
1519
1520	void
1521	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1522	PPCODE:
1523	{
1524	dREQ;
1525
1526	req->type = EIO_MKNOD;
1527	req->sv1 = newSVsv (pathname);
1528	req->ptr1 = SvPVbyte_nolen (req->sv1);
1529	req->int2 = (mode_t)mode;
1530	req->offs = dev;
1531
1532	EIO_SEND;
1533	}
1534
1535	void
1536	aio_busy (double delay, SV *callback=&PL_sv_undef)
1537	PPCODE:
1538	{
1539	dREQ;
1540
1541	req->type = EIO_BUSY;
1542	req->nv1 = delay < 0. ? 0. : delay;
1543
1544	EIO_SEND;
1545	}
1546
1547	void
1548	aio_group (SV *callback=&PL_sv_undef)
1549	PROTOTYPE: ;$
1550	PPCODE:
1551	{
1552	dREQ;
1553
1554	req->type = EIO_GROUP;
1555
1556	req_send (req);
1557	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1558	}
1559
1560	void
1561	aio_nop (SV *callback=&PL_sv_undef)
1562	ALIAS:
1563	aio_nop = EIO_NOP
1564	aio_sync = EIO_SYNC
1565	PPCODE:
1566	{
1567	dREQ;
1568
1569	#endif
1570
1571	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	2384	eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1572	{	2385	{
1573	grp->int2 = limit;	2386	grp->int2 = limit;
1574	grp->feed = feed;	2387	grp->feed = feed;
1575		2388
1576	grp_try_feed (grp);	2389	grp_try_feed (grp);
1577	}	2390	}
1578		2391
		2392	void
1579	void eio_grp_limit (eio_req *grp, int limit)	2393	eio_grp_limit (eio_req *grp, int limit)
1580	{	2394	{
1581	grp->int2 = limit;	2395	grp->int2 = limit;
1582		2396
1583	grp_try_feed (grp);	2397	grp_try_feed (grp);
1584	}	2398	}
1585		2399
		2400	void
1586	void eio_grp_add (eio_req *grp, eio_req *req)	2401	eio_grp_add (eio_req *grp, eio_req *req)
1587	{	2402	{
1588	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2403	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
		2404
		2405	grp->flags |= EIO_FLAG_GROUPADD;
1589		2406
1590	++grp->size;	2407	++grp->size;
1591	req->grp = grp;	2408	req->grp = grp;
1592		2409
1593	req->grp_prev = 0;	2410	req->grp_prev = 0;
…		…
1597	grp->grp_first->grp_prev = req;	2414	grp->grp_first->grp_prev = req;
1598		2415
1599	grp->grp_first = req;	2416	grp->grp_first = req;
1600	}	2417	}
1601		2418
		2419	/*****************************************************************************/
		2420	/* misc garbage */
1602		2421
		2422	eio_ssize_t
		2423	eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		2424	{
		2425	return eio__sendfile (ofd, ifd, offset, count);
		2426	}
		2427

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