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Comparing libeio/eio.c (file contents):
Revision 1.4 by root, Sun May 11 00:10:15 2008 UTC vs.
Revision 1.98 by root, Sun Jul 24 05:53:34 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>
…		…
8	#include <errno.h>	56	#include <errno.h>
9	#include <sys/types.h>	57	#include <sys/types.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 <sched.h>	61	#include <assert.h>
		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	#if !defined(ENOTSOCK) && defined(WSAENOTSOCK)
		77	# define ENOTSOCK WSAENOTSOCK
		78	#endif
		79
		80	static void eio_destroy (eio_req *req);
14		81
15	#ifndef EIO_FINISH	82	#ifndef EIO_FINISH
16	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	83	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
17	#endif	84	#endif
18		85
…		…
22		89
23	#ifndef EIO_FEED	90	#ifndef EIO_FEED
24	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)	91	# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0)
25	#endif	92	#endif
26		93
		94	#ifndef EIO_FD_TO_WIN32_HANDLE
		95	# define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		96	#endif
		97	#ifndef EIO_WIN32_HANDLE_TO_FD
		98	# define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		99	#endif
		100
		101	#define EIO_ERRNO(errval,retval) ((errno = errval), retval)
		102
		103	#define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1)
		104
27	#ifdef _WIN32	105	#ifdef _WIN32
28		106
29	/*doh*/	107	#undef PAGESIZE
		108	#define PAGESIZE 4096 /* GetSystemInfo? */
		109
		110	#ifdef EIO_STRUCT_STATI64
		111	#define stat(path,buf) _stati64 (path,buf)
		112	#define fstat(fd,buf) _fstati64 (fd,buf)
		113	#endif
		114	#define lstat(path,buf) stat (path,buf)
		115	#define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1))
		116	#define mkdir(path,mode) _mkdir (path)
		117	#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1))
		118
		119	#define chmod(path,mode) _chmod (path, mode)
		120	#define dup(fd) _dup (fd)
		121	#define dup2(fd1,fd2) _dup2 (fd1, fd2)
		122
		123	#define fchmod(fd,mode) EIO_ENOSYS ()
		124	#define chown(path,uid,gid) EIO_ENOSYS ()
		125	#define fchown(fd,uid,gid) EIO_ENOSYS ()
		126	#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */
		127	#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */
		128	#define mknod(path,mode,dev) EIO_ENOSYS ()
		129	#define sync() EIO_ENOSYS ()
		130	#define readlink(path,buf,s) EIO_ENOSYS ()
		131	#define statvfs(path,buf) EIO_ENOSYS ()
		132	#define fstatvfs(fd,buf) EIO_ENOSYS ()
		133
		134	/* we could even stat and see if it exists */
		135	static int
		136	symlink (const char *old, const char *neu)
		137	{
		138	#if WINVER >= 0x0600
		139	if (CreateSymbolicLink (neu, old, 1))
		140	return 0;
		141
		142	if (CreateSymbolicLink (neu, old, 0))
		143	return 0;
		144	#endif
		145
		146	return EIO_ERRNO (ENOENT, -1);
		147	}
		148
		149	/* POSIX API only */
		150	#define CreateHardLink(neu,old,flags) 0
		151	#define CreateSymbolicLink(neu,old,flags) 0
		152
		153	struct statvfs
		154	{
		155	int dummy;
		156	};
		157
		158	#define DT_DIR EIO_DT_DIR
		159	#define DT_REG EIO_DT_REG
		160	#define D_NAME(entp) entp.cFileName
		161	#define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG)
30		162
31	#else	163	#else
32		164
33	# include "config.h"
34	# include <sys/time.h>	165	#include <sys/time.h>
35	# include <sys/select.h>	166	#include <sys/select.h>
		167	#include <sys/statvfs.h>
36	# include <unistd.h>	168	#include <unistd.h>
		169	#include <signal.h>
		170	#include <dirent.h>
		171
		172	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		173	#include <sys/mman.h>
		174	#endif
		175
		176	#define D_NAME(entp) entp->d_name
		177
		178	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
		179	#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
		180	#define _DIRENT_HAVE_D_TYPE /* sigh */
		181	#define D_INO(de) (de)->d_fileno
		182	#define D_NAMLEN(de) (de)->d_namlen
		183	#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600
		184	#define D_INO(de) (de)->d_ino
		185	#endif
		186
		187	#ifdef _D_EXACT_NAMLEN
		188	#undef D_NAMLEN
		189	#define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
		190	#endif
		191
		192	#ifdef _DIRENT_HAVE_D_TYPE
		193	#define D_TYPE(de) (de)->d_type
		194	#endif
		195
		196	#ifndef EIO_STRUCT_DIRENT
		197	#define EIO_STRUCT_DIRENT struct dirent
		198	#endif
		199
		200	#endif
		201
		202	#if HAVE_UTIMES
37	# include <utime.h>	203	# include <utime.h>
38	# include <signal.h>
39	# include <dirent.h>
40
41	# ifndef EIO_STRUCT_DIRENT
42	# define EIO_STRUCT_DIRENT struct dirent
43	# endif	204	#endif
44		205
45	#endif	206	#if HAVE_SYS_SYSCALL_H
46		207	# include <sys/syscall.h>
47	# ifndef EIO_STRUCT_STAT
48	# define EIO_STRUCT_STAT struct stat
49	# endif	208	#endif
		209
		210	#if HAVE_SYS_PRCTL_H
		211	# include <sys/prctl.h>
		212	#endif
50		213
51	#if HAVE_SENDFILE	214	#if HAVE_SENDFILE
52	# if __linux	215	# if __linux
53	# include <sys/sendfile.h>	216	# include <sys/sendfile.h>
54	# elif __freebsd	217	# elif __FreeBSD__ || defined __APPLE__
55	# include <sys/socket.h>	218	# include <sys/socket.h>
56	# include <sys/uio.h>	219	# include <sys/uio.h>
57	# elif __hpux	220	# elif __hpux
58	# include <sys/socket.h>	221	# include <sys/socket.h>
59	# elif __solaris /* not yet */	222	# elif __solaris
60	# include <sys/sendfile.h>	223	# include <sys/sendfile.h>
61	# else	224	# else
62	# error sendfile support requested but not available	225	# error sendfile support requested but not available
63	# endif	226	# endif
64	#endif	227	#endif
65		228
66	/* number of seconds after which an idle threads exit */	229	#ifndef D_TYPE
67	#define IDLE_TIMEOUT 10	230	# define D_TYPE(de) 0
		231	#endif
		232	#ifndef D_INO
		233	# define D_INO(de) 0
		234	#endif
		235	#ifndef D_NAMLEN
		236	# define D_NAMLEN(entp) strlen (D_NAME (entp))
		237	#endif
68		238
69	/* used for struct dirent, AIX doesn't provide it */	239	/* used for struct dirent, AIX doesn't provide it */
70	#ifndef NAME_MAX	240	#ifndef NAME_MAX
71	# define NAME_MAX 4096	241	# define NAME_MAX 4096
72	#endif	242	#endif
73		243
		244	/* used for readlink etc. */
		245	#ifndef PATH_MAX
		246	# define PATH_MAX 4096
		247	#endif
		248
74	/* buffer size for various temporary buffers */	249	/* buffer size for various temporary buffers */
75	#define EIO_BUFSIZE 65536	250	#define EIO_BUFSIZE 65536
76		251
77	#define dBUF \	252	#define dBUF \
78	char *eio_buf; \
79	X_LOCK (wrklock); \
80	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	253	char *eio_buf = malloc (EIO_BUFSIZE); \
81	X_UNLOCK (wrklock); \	254	errno = ENOMEM; \
82	if (!eio_buf) \	255	if (!eio_buf) \
83	return -1;	256	return -1
		257
		258	#define FUBd \
		259	free (eio_buf)
84		260
85	#define EIO_TICKS ((1000000 + 1023) >> 10)	261	#define EIO_TICKS ((1000000 + 1023) >> 10)
		262
		263	#define ETP_PRI_MIN EIO_PRI_MIN
		264	#define ETP_PRI_MAX EIO_PRI_MAX
		265
		266	struct etp_worker;
		267
		268	#define ETP_REQ eio_req
		269	#define ETP_DESTROY(req) eio_destroy (req)
		270	static int eio_finish (eio_req *req);
		271	#define ETP_FINISH(req) eio_finish (req)
		272	static void eio_execute (struct etp_worker *self, eio_req *req);
		273	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		274
		275	/*****************************************************************************/
		276
		277	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		278
		279	/* calculate time difference in ~1/EIO_TICKS of a second */
		280	ecb_inline int
		281	tvdiff (struct timeval *tv1, struct timeval *tv2)
		282	{
		283	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		284	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		285	}
		286
		287	static unsigned int started, idle, wanted = 4;
86		288
87	static void (*want_poll_cb) (void);	289	static void (*want_poll_cb) (void);
88	static void (*done_poll_cb) (void);	290	static void (*done_poll_cb) (void);
89		291
90	static unsigned int max_poll_time = 0;	292	static unsigned int max_poll_time; /* reslock */
91	static unsigned int max_poll_reqs = 0;	293	static unsigned int max_poll_reqs; /* reslock */
92		294
93	/* calculcate time difference in ~1/EIO_TICKS of a second */	295	static volatile unsigned int nreqs; /* reqlock */
94	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	296	static volatile unsigned int nready; /* reqlock */
95	{	297	static volatile unsigned int npending; /* reqlock */
96	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	298	static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */
97	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);	299	static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */
98	}
99		300
100	static unsigned int started, idle, wanted;	301	static xmutex_t wrklock;
		302	static xmutex_t reslock;
		303	static xmutex_t reqlock;
		304	static xcond_t reqwait;
		305
		306	#if !HAVE_PREADWRITE
		307	/*
		308	* make our pread/pwrite emulation safe against themselves, but not against
		309	* normal read/write by using a mutex. slows down execution a lot,
		310	* but that's your problem, not mine.
		311	*/
		312	static xmutex_t preadwritelock;
		313	#endif
		314
		315	typedef struct etp_worker
		316	{
		317	/* locked by wrklock */
		318	struct etp_worker *prev, *next;
		319
		320	xthread_t tid;
		321
		322	/* locked by reslock, reqlock or wrklock */
		323	ETP_REQ *req; /* currently processed request */
		324
		325	#ifdef ETP_WORKER_COMMON
		326	ETP_WORKER_COMMON
		327	#endif
		328	} etp_worker;
		329
		330	static etp_worker wrk_first; /* NOT etp */
		331
		332	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		333	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
101		334
102	/* worker threads management */	335	/* worker threads management */
103	static mutex_t wrklock = X_MUTEX_INIT;
104		336
105	typedef struct worker {	337	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)	338	etp_worker_clear (etp_worker *wrk)
120	{	339	{
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	}	340	}
133		341
134	static void worker_free (worker *wrk)	342	static void ecb_cold
		343	etp_worker_free (etp_worker *wrk)
135	{	344	{
136	wrk->next->prev = wrk->prev;	345	wrk->next->prev = wrk->prev;
137	wrk->prev->next = wrk->next;	346	wrk->prev->next = wrk->next;
138		347
139	free (wrk);	348	free (wrk);
140	}	349	}
141		350
142	static volatile unsigned int nreqs, nready, npending;	351	static unsigned int
143	static volatile unsigned int max_idle = 4;	352	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	{	353	{
		354	int retval;
		355	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		356	retval = nreqs;
		357	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
151	return nreqs;	358	return retval;
152	}	359	}
153		360
154	unsigned int eio_nready (void)	361	static unsigned int
		362	etp_nready (void)
155	{	363	{
156	unsigned int retval;	364	unsigned int retval;
157		365
158	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	366	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
159	retval = nready;	367	retval = nready;
160	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	368	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
161		369
162	return retval;	370	return retval;
163	}	371	}
164		372
165	unsigned int eio_npending (void)	373	static unsigned int
		374	etp_npending (void)
166	{	375	{
167	unsigned int retval;	376	unsigned int retval;
168		377
169	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	378	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
170	retval = npending;	379	retval = npending;
171	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	380	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
172		381
173	return retval;	382	return retval;
174	}	383	}
175		384
176	unsigned int eio_nthreads (void)	385	static unsigned int
		386	etp_nthreads (void)
177	{	387	{
178	unsigned int retval;	388	unsigned int retval;
179		389
180	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	390	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
181	retval = started;	391	retval = started;
…		…
188	* a somewhat faster data structure might be nice, but	398	* a somewhat faster data structure might be nice, but
189	* with 8 priorities this actually needs <20 insns	399	* with 8 priorities this actually needs <20 insns
190	* per shift, the most expensive operation.	400	* per shift, the most expensive operation.
191	*/	401	*/
192	typedef struct {	402	typedef struct {
193	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	403	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
194	int size;	404	int size;
195	} reqq;	405	} etp_reqq;
196		406
197	static reqq req_queue;	407	static etp_reqq req_queue;
198	static reqq res_queue;	408	static etp_reqq res_queue;
199		409
200	static int reqq_push (reqq *q, eio_req *req)	410	static void ecb_noinline ecb_cold
		411	reqq_init (etp_reqq *q)
		412	{
		413	int pri;
		414
		415	for (pri = 0; pri < ETP_NUM_PRI; ++pri)
		416	q->qs[pri] = q->qe[pri] = 0;
		417
		418	q->size = 0;
		419	}
		420
		421	static int ecb_noinline
		422	reqq_push (etp_reqq *q, ETP_REQ *req)
201	{	423	{
202	int pri = req->pri;	424	int pri = req->pri;
203	req->next = 0;	425	req->next = 0;
204		426
205	if (q->qe[pri])	427	if (q->qe[pri])
…		…
211	q->qe[pri] = q->qs[pri] = req;	433	q->qe[pri] = q->qs[pri] = req;
212		434
213	return q->size++;	435	return q->size++;
214	}	436	}
215		437
216	static eio_req *reqq_shift (reqq *q)	438	static ETP_REQ * ecb_noinline
		439	reqq_shift (etp_reqq *q)
217	{	440	{
218	int pri;	441	int pri;
219		442
220	if (!q->size)	443	if (!q->size)
221	return 0;	444	return 0;
222		445
223	--q->size;	446	--q->size;
224		447
225	for (pri = EIO_NUM_PRI; pri--; )	448	for (pri = ETP_NUM_PRI; pri--; )
226	{	449	{
227	eio_req *req = q->qs[pri];	450	eio_req *req = q->qs[pri];
228		451
229	if (req)	452	if (req)
230	{	453	{
…		…
236	}	459	}
237		460
238	abort ();	461	abort ();
239	}	462	}
240		463
241	static void grp_try_feed (eio_req *grp)	464	static int ecb_cold
		465	etp_init (void (*want_poll)(void), void (*done_poll)(void))
242	{	466	{
243	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	467	X_MUTEX_CREATE (wrklock);
244	{	468	X_MUTEX_CREATE (reslock);
245	int old_len = grp->size;	469	X_MUTEX_CREATE (reqlock);
		470	X_COND_CREATE (reqwait);
246		471
247	EIO_FEED (grp);	472	reqq_init (&req_queue);
		473	reqq_init (&res_queue);
248		474
249	/* stop if no progress has been made */	475	wrk_first.next =
250	if (old_len == grp->size)	476	wrk_first.prev = &wrk_first;
251	{
252	grp->feed = 0;
253	break;
254	}
255	}
256	}
257		477
258	static int eio_finish (eio_req *req);	478	started = 0;
		479	idle = 0;
		480	nreqs = 0;
		481	nready = 0;
		482	npending = 0;
259		483
260	static int grp_dec (eio_req *grp)	484	want_poll_cb = want_poll;
261	{	485	done_poll_cb = done_poll;
262	--grp->size;
263		486
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;	487	return 0;
272	}	488	}
273		489
274	void eio_destroy (eio_req *req)
275	{
276	if ((req)->flags & EIO_FLAG_PTR2_FREE)
277	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	req->flags |= EIO_FLAG_CANCELLED;
318
319	eio_grp_cancel (req);
320	}
321
322	X_THREAD_PROC (eio_proc);	490	X_THREAD_PROC (etp_proc);
323		491
324	static void start_thread (void)	492	static void ecb_cold
		493	etp_start_thread (void)
325	{	494	{
326	worker *wrk = calloc (1, sizeof (worker));	495	etp_worker *wrk = calloc (1, sizeof (etp_worker));
327		496
328	if (!wrk)	497	/*TODO*/
329	croak ("unable to allocate worker thread data");	498	assert (("unable to allocate worker thread data", wrk));
330		499
331	X_LOCK (wrklock);	500	X_LOCK (wrklock);
332		501
333	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	502	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
334	{	503	{
335	wrk->prev = &wrk_first;	504	wrk->prev = &wrk_first;
336	wrk->next = wrk_first.next;	505	wrk->next = wrk_first.next;
337	wrk_first.next->prev = wrk;	506	wrk_first.next->prev = wrk;
338	wrk_first.next = wrk;	507	wrk_first.next = wrk;
…		…
342	free (wrk);	511	free (wrk);
343		512
344	X_UNLOCK (wrklock);	513	X_UNLOCK (wrklock);
345	}	514	}
346		515
		516	static void
347	static void maybe_start_thread (void)	517	etp_maybe_start_thread (void)
348	{	518	{
349	if (eio_nthreads () >= wanted)	519	if (ecb_expect_true (etp_nthreads () >= wanted))
350	return;	520	return;
351		521
352	/* todo: maybe use idle here, but might be less exact */	522	/* todo: maybe use idle here, but might be less exact */
353	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	523	if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
354	return;	524	return;
355		525
356	start_thread ();	526	etp_start_thread ();
357	}	527	}
358		528
359	void eio_submit (eio_req *req)	529	static void ecb_cold
360	{	530	etp_end_thread (void)
361	++nreqs;
362
363	X_LOCK (reqlock);
364	++nready;
365	reqq_push (&req_queue, req);
366	X_COND_SIGNAL (reqwait);
367	X_UNLOCK (reqlock);
368
369	maybe_start_thread ();
370	}
371
372	static void end_thread (void)
373	{	531	{
374	eio_req *req = calloc (1, sizeof (eio_req));	532	eio_req *req = calloc (1, sizeof (eio_req));
375		533
376	req->type = EIO_QUIT;	534	req->type = -1;
377	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	535	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
378		536
379	X_LOCK (reqlock);	537	X_LOCK (reqlock);
380	reqq_push (&req_queue, req);	538	reqq_push (&req_queue, req);
381	X_COND_SIGNAL (reqwait);	539	X_COND_SIGNAL (reqwait);
382	X_UNLOCK (reqlock);	540	X_UNLOCK (reqlock);
…		…
384	X_LOCK (wrklock);	542	X_LOCK (wrklock);
385	--started;	543	--started;
386	X_UNLOCK (wrklock);	544	X_UNLOCK (wrklock);
387	}	545	}
388		546
389	void eio_set_max_poll_time (double nseconds)	547	static int
390	{
391	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
392	max_poll_time = nseconds;
393	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
394	}
395
396	void eio_set_max_poll_reqs (unsigned int maxreqs)
397	{
398	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
399	max_poll_reqs = maxreqs;
400	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
401	}
402
403	void eio_set_max_idle (unsigned int nthreads)
404	{
405	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
406	max_idle = nthreads <= 0 ? 1 : nthreads;
407	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
408	}
409
410	void eio_set_min_parallel (unsigned int nthreads)
411	{
412	if (wanted < nthreads)
413	wanted = nthreads;
414	}
415
416	void eio_set_max_parallel (unsigned int nthreads)
417	{
418	if (wanted > nthreads)
419	wanted = nthreads;
420
421	while (started > wanted)
422	end_thread ();
423	}
424
425	int eio_poll (void)	548	etp_poll (void)
426	{	549	{
427	int maxreqs = max_poll_reqs;	550	unsigned int maxreqs;
		551	unsigned int maxtime;
428	struct timeval tv_start, tv_now;	552	struct timeval tv_start, tv_now;
429	eio_req *req;
430		553
		554	X_LOCK (reslock);
		555	maxreqs = max_poll_reqs;
		556	maxtime = max_poll_time;
		557	X_UNLOCK (reslock);
		558
431	if (max_poll_time)	559	if (maxtime)
432	gettimeofday (&tv_start, 0);	560	gettimeofday (&tv_start, 0);
433		561
434	for (;;)	562	for (;;)
435	{	563	{
		564	ETP_REQ *req;
		565
436	maybe_start_thread ();	566	etp_maybe_start_thread ();
437		567
438	X_LOCK (reslock);	568	X_LOCK (reslock);
439	req = reqq_shift (&res_queue);	569	req = reqq_shift (&res_queue);
440		570
441	if (req)	571	if (req)
…		…
449	X_UNLOCK (reslock);	579	X_UNLOCK (reslock);
450		580
451	if (!req)	581	if (!req)
452	return 0;	582	return 0;
453		583
		584	X_LOCK (reqlock);
454	--nreqs;	585	--nreqs;
		586	X_UNLOCK (reqlock);
455		587
456	if (req->type == EIO_GROUP && req->size)	588	if (ecb_expect_false (req->type == EIO_GROUP && req->size))
457	{	589	{
458	req->int1 = 1; /* mark request as delayed */	590	req->int1 = 1; /* mark request as delayed */
459	continue;	591	continue;
460	}	592	}
461	else	593	else
462	{	594	{
463	int res = eio_finish (req);	595	int res = ETP_FINISH (req);
464	if (res)	596	if (ecb_expect_false (res))
465	return res;	597	return res;
466	}	598	}
467		599
468	if (maxreqs && !--maxreqs)	600	if (ecb_expect_false (maxreqs && !--maxreqs))
469	break;	601	break;
470		602
471	if (max_poll_time)	603	if (maxtime)
472	{	604	{
473	gettimeofday (&tv_now, 0);	605	gettimeofday (&tv_now, 0);
474		606
475	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	607	if (tvdiff (&tv_start, &tv_now) >= maxtime)
476	break;	608	break;
477	}	609	}
478	}	610	}
479		611
480	errno = EAGAIN;	612	errno = EAGAIN;
481	return -1;	613	return -1;
482	}	614	}
483		615
		616	static void
		617	etp_cancel (ETP_REQ *req)
		618	{
		619	req->cancelled = 1;
		620
		621	eio_grp_cancel (req);
		622	}
		623
		624	static void
		625	etp_submit (ETP_REQ *req)
		626	{
		627	req->pri -= ETP_PRI_MIN;
		628
		629	if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
		630	if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		631
		632	if (ecb_expect_false (req->type == EIO_GROUP))
		633	{
		634	/* I hope this is worth it :/ */
		635	X_LOCK (reqlock);
		636	++nreqs;
		637	X_UNLOCK (reqlock);
		638
		639	X_LOCK (reslock);
		640
		641	++npending;
		642
		643	if (!reqq_push (&res_queue, req) && want_poll_cb)
		644	want_poll_cb ();
		645
		646	X_UNLOCK (reslock);
		647	}
		648	else
		649	{
		650	X_LOCK (reqlock);
		651	++nreqs;
		652	++nready;
		653	reqq_push (&req_queue, req);
		654	X_COND_SIGNAL (reqwait);
		655	X_UNLOCK (reqlock);
		656
		657	etp_maybe_start_thread ();
		658	}
		659	}
		660
		661	static void ecb_cold
		662	etp_set_max_poll_time (double nseconds)
		663	{
		664	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		665	max_poll_time = nseconds * EIO_TICKS;
		666	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		667	}
		668
		669	static void ecb_cold
		670	etp_set_max_poll_reqs (unsigned int maxreqs)
		671	{
		672	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		673	max_poll_reqs = maxreqs;
		674	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		675	}
		676
		677	static void ecb_cold
		678	etp_set_max_idle (unsigned int nthreads)
		679	{
		680	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		681	max_idle = nthreads;
		682	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		683	}
		684
		685	static void ecb_cold
		686	etp_set_idle_timeout (unsigned int seconds)
		687	{
		688	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		689	idle_timeout = seconds;
		690	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		691	}
		692
		693	static void ecb_cold
		694	etp_set_min_parallel (unsigned int nthreads)
		695	{
		696	if (wanted < nthreads)
		697	wanted = nthreads;
		698	}
		699
		700	static void ecb_cold
		701	etp_set_max_parallel (unsigned int nthreads)
		702	{
		703	if (wanted > nthreads)
		704	wanted = nthreads;
		705
		706	while (started > wanted)
		707	etp_end_thread ();
		708	}
		709
		710	/*****************************************************************************/
		711
		712	static void
		713	grp_try_feed (eio_req *grp)
		714	{
		715	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
		716	{
		717	grp->flags &= ~EIO_FLAG_GROUPADD;
		718
		719	EIO_FEED (grp);
		720
		721	/* stop if no progress has been made */
		722	if (!(grp->flags & EIO_FLAG_GROUPADD))
		723	{
		724	grp->feed = 0;
		725	break;
		726	}
		727	}
		728	}
		729
		730	static int
		731	grp_dec (eio_req *grp)
		732	{
		733	--grp->size;
		734
		735	/* call feeder, if applicable */
		736	grp_try_feed (grp);
		737
		738	/* finish, if done */
		739	if (!grp->size && grp->int1)
		740	return eio_finish (grp);
		741	else
		742	return 0;
		743	}
		744
		745	static void
		746	eio_destroy (eio_req *req)
		747	{
		748	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
		749	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
		750
		751	EIO_DESTROY (req);
		752	}
		753
		754	static int
		755	eio_finish (eio_req *req)
		756	{
		757	int res = EIO_FINISH (req);
		758
		759	if (req->grp)
		760	{
		761	int res2;
		762	eio_req *grp = req->grp;
		763
		764	/* unlink request */
		765	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		766	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		767
		768	if (grp->grp_first == req)
		769	grp->grp_first = req->grp_next;
		770
		771	res2 = grp_dec (grp);
		772
		773	if (!res)
		774	res = res2;
		775	}
		776
		777	eio_destroy (req);
		778
		779	return res;
		780	}
		781
		782	void
		783	eio_grp_cancel (eio_req *grp)
		784	{
		785	for (grp = grp->grp_first; grp; grp = grp->grp_next)
		786	eio_cancel (grp);
		787	}
		788
		789	void
		790	eio_cancel (eio_req *req)
		791	{
		792	etp_cancel (req);
		793	}
		794
		795	void
		796	eio_submit (eio_req *req)
		797	{
		798	etp_submit (req);
		799	}
		800
		801	unsigned int
		802	eio_nreqs (void)
		803	{
		804	return etp_nreqs ();
		805	}
		806
		807	unsigned int
		808	eio_nready (void)
		809	{
		810	return etp_nready ();
		811	}
		812
		813	unsigned int
		814	eio_npending (void)
		815	{
		816	return etp_npending ();
		817	}
		818
		819	unsigned int ecb_cold
		820	eio_nthreads (void)
		821	{
		822	return etp_nthreads ();
		823	}
		824
		825	void ecb_cold
		826	eio_set_max_poll_time (double nseconds)
		827	{
		828	etp_set_max_poll_time (nseconds);
		829	}
		830
		831	void ecb_cold
		832	eio_set_max_poll_reqs (unsigned int maxreqs)
		833	{
		834	etp_set_max_poll_reqs (maxreqs);
		835	}
		836
		837	void ecb_cold
		838	eio_set_max_idle (unsigned int nthreads)
		839	{
		840	etp_set_max_idle (nthreads);
		841	}
		842
		843	void ecb_cold
		844	eio_set_idle_timeout (unsigned int seconds)
		845	{
		846	etp_set_idle_timeout (seconds);
		847	}
		848
		849	void ecb_cold
		850	eio_set_min_parallel (unsigned int nthreads)
		851	{
		852	etp_set_min_parallel (nthreads);
		853	}
		854
		855	void ecb_cold
		856	eio_set_max_parallel (unsigned int nthreads)
		857	{
		858	etp_set_max_parallel (nthreads);
		859	}
		860
		861	int eio_poll (void)
		862	{
		863	return etp_poll ();
		864	}
		865
484	/*****************************************************************************/	866	/*****************************************************************************/
485	/* work around various missing functions */	867	/* work around various missing functions */
486		868
487	#if !HAVE_PREADWRITE	869	#if !HAVE_PREADWRITE
		870	# undef pread
		871	# undef pwrite
488	# define pread aio_pread	872	# define pread eio__pread
489	# define pwrite aio_pwrite	873	# define pwrite eio__pwrite
490		874
491	/*	875	static eio_ssize_t
492	* make our pread/pwrite safe against themselves, but not against	876	eio__pread (int fd, void *buf, size_t count, off_t offset)
493	* normal read/write by using a mutex. slows down execution a lot,
494	* but that's your problem, not mine.
495	*/
496	static mutex_t preadwritelock = X_MUTEX_INIT;
497
498	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
499	{	877	{
500	ssize_t res;	878	eio_ssize_t res;
501	off_t ooffset;	879	off_t ooffset;
502		880
503	X_LOCK (preadwritelock);	881	X_LOCK (preadwritelock);
504	ooffset = lseek (fd, 0, SEEK_CUR);	882	ooffset = lseek (fd, 0, SEEK_CUR);
505	lseek (fd, offset, SEEK_SET);	883	lseek (fd, offset, SEEK_SET);
…		…
508	X_UNLOCK (preadwritelock);	886	X_UNLOCK (preadwritelock);
509		887
510	return res;	888	return res;
511	}	889	}
512		890
513	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	891	static eio_ssize_t
		892	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
514	{	893	{
515	ssize_t res;	894	eio_ssize_t res;
516	off_t ooffset;	895	off_t ooffset;
517		896
518	X_LOCK (preadwritelock);	897	X_LOCK (preadwritelock);
519	ooffset = lseek (fd, 0, SEEK_CUR);	898	ooffset = lseek (fd, 0, SEEK_CUR);
520	lseek (fd, offset, SEEK_SET);	899	lseek (fd, offset, SEEK_SET);
521	res = write (fd, buf, count);	900	res = write (fd, buf, count);
522	lseek (fd, offset, SEEK_SET);	901	lseek (fd, ooffset, SEEK_SET);
523	X_UNLOCK (preadwritelock);	902	X_UNLOCK (preadwritelock);
524		903
525	return res;	904	return res;
526	}	905	}
527	#endif	906	#endif
528		907
529	#ifndef HAVE_FUTIMES	908	#ifndef HAVE_UTIMES
530		909
		910	# undef utimes
531	# define utimes(path,times) aio_utimes (path, times)	911	# define utimes(path,times) eio__utimes (path, times)
532	# define futimes(fd,times) aio_futimes (fd, times)
533		912
		913	static int
534	static int aio_utimes (const char *filename, const struct timeval times[2])	914	eio__utimes (const char *filename, const struct timeval times[2])
535	{	915	{
536	if (times)	916	if (times)
537	{	917	{
538	struct utimbuf buf;	918	struct utimbuf buf;
539		919
…		…
544	}	924	}
545	else	925	else
546	return utime (filename, 0);	926	return utime (filename, 0);
547	}	927	}
548		928
		929	#endif
		930
		931	#ifndef HAVE_FUTIMES
		932
		933	# undef futimes
		934	# define futimes(fd,times) eio__futimes (fd, times)
		935
		936	static int
549	static int aio_futimes (int fd, const struct timeval tv[2])	937	eio__futimes (int fd, const struct timeval tv[2])
550	{	938	{
551	errno = ENOSYS;	939	errno = ENOSYS;
552	return -1;	940	return -1;
553	}	941	}
554		942
555	#endif	943	#endif
556		944
557	#if !HAVE_FDATASYNC	945	#if !HAVE_FDATASYNC
		946	# undef fdatasync
558	# define fdatasync fsync	947	# define fdatasync(fd) fsync (fd)
559	#endif	948	#endif
		949
		950	static int
		951	eio__syncfs (int fd)
		952	{
		953	int res;
		954
		955	#if HAVE_SYS_SYNCFS
		956	res = (int)syscall (__NR_syncfs, (int)(fd));
		957	#else
		958	res = -1;
		959	errno = ENOSYS;
		960	#endif
		961
		962	if (res < 0 && errno == ENOSYS && fd >= 0)
		963	sync ();
		964
		965	return res;
		966	}
		967
		968	/* sync_file_range always needs emulation */
		969	static int
		970	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
		971	{
		972	#if HAVE_SYNC_FILE_RANGE
		973	int res;
		974
		975	if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
		976	|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
		977	|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
		978	{
		979	flags = 0
		980	| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
		981	| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
		982	| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
		983	}
		984
		985	res = sync_file_range (fd, offset, nbytes, flags);
		986
		987	if (!res || errno != ENOSYS)
		988	return res;
		989	#endif
		990
		991	/* even though we could play tricks with the flags, it's better to always
		992	* call fdatasync, as that matches the expectation of its users best */
		993	return fdatasync (fd);
		994	}
		995
		996	static int
		997	eio__fallocate (int fd, int mode, off_t offset, size_t len)
		998	{
		999	#if HAVE_FALLOCATE
		1000	return fallocate (fd, mode, offset, len);
		1001	#else
		1002	errno = ENOSYS;
		1003	return -1;
		1004	#endif
		1005	}
560		1006
561	#if !HAVE_READAHEAD	1007	#if !HAVE_READAHEAD
		1008	# undef readahead
562	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	1009	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
563		1010
		1011	static eio_ssize_t
564	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	1012	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
565	{	1013	{
566	size_t todo = count;	1014	size_t todo = count;
567	dBUF;	1015	dBUF;
568		1016
569	while (todo > 0)	1017	while (todo > 0)
…		…
573	pread (fd, eio_buf, len, offset);	1021	pread (fd, eio_buf, len, offset);
574	offset += len;	1022	offset += len;
575	todo -= len;	1023	todo -= len;
576	}	1024	}
577		1025
		1026	FUBd;
		1027
578	errno = 0;	1028	errno = 0;
579	return count;	1029	return count;
580	}	1030	}
581		1031
582	#endif	1032	#endif
583		1033
584	#if !HAVE_READDIR_R
585	# define readdir_r aio_readdir_r
586
587	static mutex_t readdirlock = X_MUTEX_INIT;
588
589	static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)
590	{
591	X_DIRENT *e;
592	int errorno;
593
594	X_LOCK (readdirlock);
595
596	e = readdir (dirp);
597	errorno = errno;
598
599	if (e)
600	{
601	*res = ent;
602	strcpy (ent->d_name, e->d_name);
603	}
604	else
605	*res = 0;
606
607	X_UNLOCK (readdirlock);
608
609	errno = errorno;
610	return e ? 0 : -1;
611	}
612	#endif
613
614	/* sendfile always needs emulation */	1034	/* sendfile always needs emulation */
		1035	static eio_ssize_t
615	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	1036	eio__sendfile (int ofd, int ifd, off_t offset, size_t count)
616	{	1037	{
		1038	eio_ssize_t written = 0;
617	ssize_t res;	1039	eio_ssize_t res;
618		1040
619	if (!count)	1041	if (!count)
620	return 0;	1042	return 0;
621		1043
		1044	for (;;)
		1045	{
		1046	#ifdef __APPLE__
		1047	# undef HAVE_SENDFILE /* broken, as everything on os x */
		1048	#endif
622	#if HAVE_SENDFILE	1049	#if HAVE_SENDFILE
623	# if __linux	1050	# if __linux
		1051	off_t soffset = offset;
624	res = sendfile (ofd, ifd, &offset, count);	1052	res = sendfile (ofd, ifd, &soffset, count);
625		1053
626	# elif __freebsd	1054	# elif __FreeBSD__
627	/*	1055	/*
628	* Of course, the freebsd sendfile is a dire hack with no thoughts	1056	* Of course, the freebsd sendfile is a dire hack with no thoughts
629	* wasted on making it similar to other I/O functions.	1057	* wasted on making it similar to other I/O functions.
630	*/	1058	*/
631	{
632	off_t sbytes;	1059	off_t sbytes;
633	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	1060	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
634		1061
635	if (res < 0 && sbytes)	1062	#if 0 /* according to the manpage, this is correct, but broken behaviour */
636	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */	1063	/* freebsd' sendfile will return 0 on success */
		1064	/* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */
		1065	/* not on e.g. EIO or EPIPE - sounds broken */
		1066	if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0)
637	res = sbytes;	1067	res = sbytes;
638	}	1068	#endif
		1069
		1070	/* according to source inspection, this is correct, and useful behaviour */
		1071	if (sbytes)
		1072	res = sbytes;
		1073
		1074	# elif defined (__APPLE__)
		1075	off_t sbytes = count;
		1076	res = sendfile (ifd, ofd, offset, &sbytes, 0, 0);
		1077
		1078	/* according to the manpage, sbytes is always valid */
		1079	if (sbytes)
		1080	res = sbytes;
639		1081
640	# elif __hpux	1082	# elif __hpux
641	res = sendfile (ofd, ifd, offset, count, 0, 0);	1083	res = sendfile (ofd, ifd, offset, count, 0, 0);
642		1084
643	# elif __solaris	1085	# elif __solaris
644	{
645	struct sendfilevec vec;	1086	struct sendfilevec vec;
646	size_t sbytes;	1087	size_t sbytes;
647		1088
648	vec.sfv_fd = ifd;	1089	vec.sfv_fd = ifd;
649	vec.sfv_flag = 0;	1090	vec.sfv_flag = 0;
650	vec.sfv_off = offset;	1091	vec.sfv_off = offset;
651	vec.sfv_len = count;	1092	vec.sfv_len = count;
652		1093
653	res = sendfilev (ofd, &vec, 1, &sbytes);	1094	res = sendfilev (ofd, &vec, 1, &sbytes);
654		1095
655	if (res < 0 && sbytes)	1096	if (res < 0 && sbytes)
656	res = sbytes;	1097	res = sbytes;
657	}
658		1098
659	# endif	1099	# endif
		1100
		1101	#elif defined (_WIN32) && 0
		1102	/* does not work, just for documentation of what would need to be done */
		1103	/* actually, cannot be done like this, as TransmitFile changes the file offset, */
		1104	/* libeio guarantees that the file offset does not change, and windows */
		1105	/* has no way to get an independent handle to the same file description */
		1106	HANDLE h = TO_SOCKET (ifd);
		1107	SetFilePointer (h, offset, 0, FILE_BEGIN);
		1108	res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0);
		1109
660	#else	1110	#else
661	res = -1;	1111	res = -1;
662	errno = ENOSYS;	1112	errno = ENOSYS;
663	#endif	1113	#endif
664		1114
		1115	/* we assume sendfile can copy at least 128mb in one go */
		1116	if (res <= 128 * 1024 * 1024)
		1117	{
		1118	if (res > 0)
		1119	written += res;
		1120
		1121	if (written)
		1122	return written;
		1123
		1124	break;
		1125	}
		1126	else
		1127	{
		1128	/* if we requested more, then probably the kernel was lazy */
		1129	written += res;
		1130	offset += res;
		1131	count -= res;
		1132
		1133	if (!count)
		1134	return written;
		1135	}
		1136	}
		1137
665	if (res < 0	1138	if (res < 0
666	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	1139	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		1140	/* BSDs */
		1141	#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */
		1142	|| errno == ENOTSUP
		1143	#endif
		1144	#ifdef EOPNOTSUPP /* windows */
		1145	|| errno == EOPNOTSUPP /* BSDs */
		1146	#endif
667	#if __solaris	1147	#if __solaris
668	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	1148	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
669	#endif	1149	#endif
670	)	1150	)
671	)	1151	)
…		…
675		1155
676	res = 0;	1156	res = 0;
677		1157
678	while (count)	1158	while (count)
679	{	1159	{
680	ssize_t cnt;	1160	eio_ssize_t cnt;
681		1161
682	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);	1162	cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset);
683		1163
684	if (cnt <= 0)	1164	if (cnt <= 0)
685	{	1165	{
…		…
697		1177
698	offset += cnt;	1178	offset += cnt;
699	res += cnt;	1179	res += cnt;
700	count -= cnt;	1180	count -= cnt;
701	}	1181	}
		1182
		1183	FUBd;
702	}	1184	}
703		1185
704	return res;	1186	return res;
705	}	1187	}
706		1188
		1189	#ifdef PAGESIZE
		1190	# define eio_pagesize() PAGESIZE
		1191	#else
		1192	static intptr_t
		1193	eio_pagesize (void)
		1194	{
		1195	static intptr_t page;
		1196
		1197	if (!page)
		1198	page = sysconf (_SC_PAGESIZE);
		1199
		1200	return page;
		1201	}
		1202	#endif
		1203
		1204	static void
		1205	eio_page_align (void **addr, size_t *length)
		1206	{
		1207	intptr_t mask = eio_pagesize () - 1;
		1208
		1209	/* round down addr */
		1210	intptr_t adj = mask & (intptr_t)*addr;
		1211
		1212	*addr = (void *)((intptr_t)*addr - adj);
		1213	*length += adj;
		1214
		1215	/* round up length */
		1216	*length = (*length + mask) & ~mask;
		1217	}
		1218
		1219	#if !_POSIX_MEMLOCK
		1220	# define eio__mlockall(a) EIO_ENOSYS ()
		1221	#else
		1222
		1223	static int
		1224	eio__mlockall (int flags)
		1225	{
		1226	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1227	extern int mallopt (int, int);
		1228	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1229	#endif
		1230
		1231	if (EIO_MCL_CURRENT != MCL_CURRENT
		1232	|| EIO_MCL_FUTURE != MCL_FUTURE)
		1233	{
		1234	flags = 0
		1235	| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0)
		1236	| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0);
		1237	}
		1238
		1239	return mlockall (flags);
		1240	}
		1241	#endif
		1242
		1243	#if !_POSIX_MEMLOCK_RANGE
		1244	# define eio__mlock(a,b) EIO_ENOSYS ()
		1245	#else
		1246
		1247	static int
		1248	eio__mlock (void *addr, size_t length)
		1249	{
		1250	eio_page_align (&addr, &length);
		1251
		1252	return mlock (addr, length);
		1253	}
		1254
		1255	#endif
		1256
		1257	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1258	# define eio__msync(a,b,c) EIO_ENOSYS ()
		1259	#else
		1260
		1261	static int
		1262	eio__msync (void *mem, size_t len, int flags)
		1263	{
		1264	eio_page_align (&mem, &len);
		1265
		1266	if (EIO_MS_ASYNC != MS_SYNC
		1267	|| EIO_MS_INVALIDATE != MS_INVALIDATE
		1268	|| EIO_MS_SYNC != MS_SYNC)
		1269	{
		1270	flags = 0
		1271	| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0)
		1272	| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0)
		1273	| (flags & EIO_MS_SYNC ? MS_SYNC : 0);
		1274	}
		1275
		1276	return msync (mem, len, flags);
		1277	}
		1278
		1279	#endif
		1280
		1281	static int
		1282	eio__mtouch (eio_req *req)
		1283	{
		1284	void *mem = req->ptr2;
		1285	size_t len = req->size;
		1286	int flags = req->int1;
		1287
		1288	eio_page_align (&mem, &len);
		1289
		1290	{
		1291	intptr_t addr = (intptr_t)mem;
		1292	intptr_t end = addr + len;
		1293	intptr_t page = eio_pagesize ();
		1294
		1295	if (addr < end)
		1296	if (flags & EIO_MT_MODIFY) /* modify */
		1297	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1298	else
		1299	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req));
		1300	}
		1301
		1302	return 0;
		1303	}
		1304
		1305	/*****************************************************************************/
		1306	/* requests implemented outside eio_execute, because they are so large */
		1307
		1308	static void
		1309	eio__realpath (eio_req *req, etp_worker *self)
		1310	{
		1311	char *rel = req->ptr1;
		1312	char *res;
		1313	char *tmp1, *tmp2;
		1314	#if SYMLOOP_MAX > 32
		1315	int symlinks = SYMLOOP_MAX;
		1316	#else
		1317	int symlinks = 32;
		1318	#endif
		1319
		1320	req->result = -1;
		1321
		1322	errno = EINVAL;
		1323	if (!rel)
		1324	return;
		1325
		1326	errno = ENOENT;
		1327	if (!*rel)
		1328	return;
		1329
		1330	if (!req->ptr2)
		1331	{
		1332	X_LOCK (wrklock);
		1333	req->flags |= EIO_FLAG_PTR2_FREE;
		1334	X_UNLOCK (wrklock);
		1335	req->ptr2 = malloc (PATH_MAX * 3);
		1336
		1337	errno = ENOMEM;
		1338	if (!req->ptr2)
		1339	return;
		1340	}
		1341
		1342	res = req->ptr2;
		1343	tmp1 = res + PATH_MAX;
		1344	tmp2 = tmp1 + PATH_MAX;
		1345
		1346	#if 0 /* disabled, the musl way to do things is just too racy */
		1347	#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME)
		1348	/* on linux we may be able to ask the kernel */
		1349	{
		1350	int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME);
		1351
		1352	if (fd >= 0)
		1353	{
		1354	sprintf (tmp1, "/proc/self/fd/%d", fd);
		1355	req->result = readlink (tmp1, res, PATH_MAX);
		1356	close (fd);
		1357
		1358	/* here we should probably stat the open file and the disk file, to make sure they still match */
		1359
		1360	if (req->result > 0)
		1361	goto done;
		1362	}
		1363	else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO)
		1364	return;
		1365	}
		1366	#endif
		1367	#endif
		1368
		1369	if (*rel != '/')
		1370	{
		1371	if (!getcwd (res, PATH_MAX))
		1372	return;
		1373
		1374	if (res [1]) /* only use if not / */
		1375	res += strlen (res);
		1376	}
		1377
		1378	while (*rel)
		1379	{
		1380	eio_ssize_t len, linklen;
		1381	char *beg = rel;
		1382
		1383	while (*rel && *rel != '/')
		1384	++rel;
		1385
		1386	len = rel - beg;
		1387
		1388	if (!len) /* skip slashes */
		1389	{
		1390	++rel;
		1391	continue;
		1392	}
		1393
		1394	if (beg [0] == '.')
		1395	{
		1396	if (len == 1)
		1397	continue; /* . - nop */
		1398
		1399	if (beg [1] == '.' && len == 2)
		1400	{
		1401	/* .. - back up one component, if possible */
		1402
		1403	while (res != req->ptr2)
		1404	if (*--res == '/')
		1405	break;
		1406
		1407	continue;
		1408	}
		1409	}
		1410
		1411	errno = ENAMETOOLONG;
		1412	if (res + 1 + len + 1 >= tmp1)
		1413	return;
		1414
		1415	/* copy one component */
		1416	*res = '/';
		1417	memcpy (res + 1, beg, len);
		1418
		1419	/* zero-terminate, for readlink */
		1420	res [len + 1] = 0;
		1421
		1422	/* now check if it's a symlink */
		1423	linklen = readlink (req->ptr2, tmp1, PATH_MAX);
		1424
		1425	if (linklen < 0)
		1426	{
		1427	if (errno != EINVAL)
		1428	return;
		1429
		1430	/* it's a normal directory. hopefully */
		1431	res += len + 1;
		1432	}
		1433	else
		1434	{
		1435	/* yay, it was a symlink - build new path in tmp2 */
		1436	int rellen = strlen (rel);
		1437
		1438	errno = ENAMETOOLONG;
		1439	if (linklen + 1 + rellen >= PATH_MAX)
		1440	return;
		1441
		1442	errno = ELOOP;
		1443	if (!--symlinks)
		1444	return;
		1445
		1446	if (*tmp1 == '/')
		1447	res = req->ptr2; /* symlink resolves to an absolute path */
		1448
		1449	/* we need to be careful, as rel might point into tmp2 already */
		1450	memmove (tmp2 + linklen + 1, rel, rellen + 1);
		1451	tmp2 [linklen] = '/';
		1452	memcpy (tmp2, tmp1, linklen);
		1453
		1454	rel = tmp2;
		1455	}
		1456	}
		1457
		1458	/* special case for the lone root path */
		1459	if (res == req->ptr2)
		1460	*res++ = '/';
		1461
		1462	req->result = res - (char *)req->ptr2;
		1463
		1464	done:
		1465	req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */
		1466	}
		1467
		1468	static signed char
		1469	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
		1470	{
		1471	return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */
		1472	: a->inode < b->inode ? -1
		1473	: a->inode > b->inode ? 1
		1474	: 0;
		1475	}
		1476
		1477	#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0
		1478
		1479	#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */
		1480	#define EIO_SORT_FAST 60 /* when to only use insertion sort */
		1481
		1482	static void
		1483	eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
		1484	{
		1485	unsigned char bits [9 + sizeof (eio_ino_t) * 8];
		1486	unsigned char *bit = bits;
		1487
		1488	assert (CHAR_BIT == 8);
		1489	assert (sizeof (eio_dirent) * 8 < 256);
		1490	assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */
		1491	assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */
		1492
		1493	if (size <= EIO_SORT_FAST)
		1494	return;
		1495
		1496	/* first prepare an array of bits to test in our radix sort */
		1497	/* try to take endianness into account, as well as differences in eio_ino_t sizes */
		1498	/* inode_bits must contain all inodes ORed together */
		1499	/* which is used to skip bits that are 0 everywhere, which is very common */
		1500	{
		1501	eio_ino_t endianness;
		1502	int i, j;
		1503
		1504	/* we store the byte offset of byte n into byte n of "endianness" */
		1505	for (i = 0; i < sizeof (eio_ino_t); ++i)
		1506	((unsigned char *)&endianness)[i] = i;
		1507
		1508	*bit++ = 0;
		1509
		1510	for (i = 0; i < sizeof (eio_ino_t); ++i)
		1511	{
		1512	/* shifting off the byte offsets out of "endianness" */
		1513	int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8;
		1514	endianness >>= 8;
		1515
		1516	for (j = 0; j < 8; ++j)
		1517	if (inode_bits & (((eio_ino_t)1) << (i * 8 + j)))
		1518	*bit++ = offs + j;
		1519	}
		1520
		1521	for (j = 0; j < 8; ++j)
		1522	if (score_bits & (1 << j))
		1523	*bit++ = offsetof (eio_dirent, score) * 8 + j;
		1524	}
		1525
		1526	/* now actually do the sorting (a variant of MSD radix sort) */
		1527	{
		1528	eio_dirent *base_stk [9 + sizeof (eio_ino_t) * 8], *base;
		1529	eio_dirent *end_stk [9 + sizeof (eio_ino_t) * 8], *end;
		1530	unsigned char *bit_stk [9 + sizeof (eio_ino_t) * 8];
		1531	int stk_idx = 0;
		1532
		1533	base_stk [stk_idx] = dents;
		1534	end_stk [stk_idx] = dents + size;
		1535	bit_stk [stk_idx] = bit - 1;
		1536
		1537	do
		1538	{
		1539	base = base_stk [stk_idx];
		1540	end = end_stk [stk_idx];
		1541	bit = bit_stk [stk_idx];
		1542
		1543	for (;;)
		1544	{
		1545	unsigned char O = *bit >> 3;
		1546	unsigned char M = 1 << (*bit & 7);
		1547
		1548	eio_dirent *a = base;
		1549	eio_dirent *b = end;
		1550
		1551	if (b - a < EIO_SORT_CUTOFF)
		1552	break;
		1553
		1554	/* now bit-partition the array on the bit */
		1555	/* this ugly asymmetric loop seems to perform much better than typical */
		1556	/* partition algos found in the literature */
		1557	do
		1558	if (!(((unsigned char *)a)[O] & M))
		1559	++a;
		1560	else if (!(((unsigned char *)--b)[O] & M))
		1561	{
		1562	eio_dirent tmp = *a; *a = *b; *b = tmp;
		1563	++a;
		1564	}
		1565	while (b > a);
		1566
		1567	/* next bit, or stop, if no bits left in this path */
		1568	if (!*--bit)
		1569	break;
		1570
		1571	base_stk [stk_idx] = a;
		1572	end_stk [stk_idx] = end;
		1573	bit_stk [stk_idx] = bit;
		1574	++stk_idx;
		1575
		1576	end = a;
		1577	}
		1578	}
		1579	while (stk_idx--);
		1580	}
		1581	}
		1582
		1583	static void
		1584	eio_dent_insertion_sort (eio_dirent *dents, int size)
		1585	{
		1586	/* first move the smallest element to the front, to act as a sentinel */
		1587	{
		1588	int i;
		1589	eio_dirent *min = dents;
		1590
		1591	/* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */
		1592	for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; )
		1593	if (EIO_DENT_CMP (dents [i], <, *min))
		1594	min = &dents [i];
		1595
		1596	/* swap elements 0 and j (minimum) */
		1597	{
		1598	eio_dirent tmp = *dents; *dents = *min; *min = tmp;
		1599	}
		1600	}
		1601
		1602	/* then do standard insertion sort, assuming that all elements are >= dents [0] */
		1603	{
		1604	eio_dirent *i, *j;
		1605
		1606	for (i = dents + 1; i < dents + size; ++i)
		1607	{
		1608	eio_dirent value = *i;
		1609
		1610	for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j)
		1611	j [1] = j [0];
		1612
		1613	j [1] = value;
		1614	}
		1615	}
		1616	}
		1617
		1618	static void
		1619	eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits)
		1620	{
		1621	if (size <= 1)
		1622	return; /* our insertion sort relies on size > 0 */
		1623
		1624	/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */
		1625	/* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */
		1626	eio_dent_radix_sort (dents, size, score_bits, inode_bits);
		1627
		1628	/* use an insertion sort at the end, or for small arrays, */
		1629	/* as insertion sort is more efficient for small partitions */
		1630	eio_dent_insertion_sort (dents, size);
		1631	}
		1632
707	/* read a full directory */	1633	/* read a full directory */
		1634	static void
708	static void scandir_ (eio_req *req, worker *self)	1635	eio__scandir (eio_req *req, etp_worker *self)
709	{	1636	{
		1637	char *name, *names;
		1638	int namesalloc = 4096 - sizeof (void *) * 4;
		1639	int namesoffs = 0;
		1640	int flags = req->int1;
		1641	eio_dirent *dents = 0;
		1642	int dentalloc = 128;
		1643	int dentoffs = 0;
		1644	eio_ino_t inode_bits = 0;
		1645	#ifdef _WIN32
		1646	HANDLE dirp;
		1647	WIN32_FIND_DATA entp;
		1648	#else
710	DIR *dirp;	1649	DIR *dirp;
711	union
712	{
713	EIO_STRUCT_DIRENT d;
714	char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1];
715	} *u;
716	EIO_STRUCT_DIRENT *entp;	1650	EIO_STRUCT_DIRENT *entp;
717	char *name, *names;	1651	#endif
718	int memlen = 4096;
719	int memofs = 0;
720	int res = 0;
721		1652
722	X_LOCK (wrklock);	1653	req->result = -1;
		1654
		1655	if (!(flags & EIO_READDIR_DENTS))
		1656	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
		1657
		1658	#ifdef _WIN32
		1659	{
		1660	int len = strlen ((const char *)req->ptr1);
		1661	char *path = malloc (MAX_PATH);
		1662	const char *fmt;
		1663
		1664	if (!len)
		1665	fmt = "./*";
		1666	else if (((const char *)req->ptr1)[len - 1] == '/' || ((const char *)req->ptr1)[len - 1] == '\\')
		1667	fmt = "%s*";
		1668	else
		1669	fmt = "%s/*";
		1670
		1671	_snprintf (path, MAX_PATH, fmt, (const char *)req->ptr1);
		1672	dirp = FindFirstFile (path, &entp);
		1673	free (path);
		1674
		1675	if (dirp == INVALID_HANDLE_VALUE)
		1676	{
		1677	dirp = 0;
		1678
		1679	switch (GetLastError ())
		1680	{
		1681	case ERROR_FILE_NOT_FOUND:
		1682	req->result = 0;
		1683	break;
		1684
		1685	case ERROR_INVALID_NAME:
		1686	case ERROR_PATH_NOT_FOUND:
		1687	case ERROR_NO_MORE_FILES:
		1688	errno = ENOENT;
		1689	break;
		1690
		1691	case ERROR_NOT_ENOUGH_MEMORY:
		1692	errno = ENOMEM;
		1693	break;
		1694
		1695	default:
		1696	errno = EINVAL;
		1697	break;
		1698	}
		1699	}
		1700	}
		1701	#else
723	self->dirp = dirp = opendir (req->ptr1);	1702	dirp = opendir (req->ptr1);
724	self->dbuf = u = malloc (sizeof (*u));	1703	#endif
		1704
725	req->flags |= EIO_FLAG_PTR2_FREE;	1705	if (req->flags & EIO_FLAG_PTR1_FREE)
		1706	free (req->ptr1);
		1707
		1708	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
		1709	req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
726	req->ptr2 = names = malloc (memlen);	1710	req->ptr2 = names = malloc (namesalloc);
727	X_UNLOCK (wrklock);
728		1711
729	if (dirp && u && names)	1712	if (dirp && names && (!flags || dents))
730	for (;;)	1713	for (;;)
731	{	1714	{
		1715	int done;
		1716
		1717	#ifdef _WIN32
		1718	done = !dirp;
		1719	#else
732	errno = 0;	1720	errno = 0;
733	readdir_r (dirp, &u->d, &entp);	1721	entp = readdir (dirp);
		1722	done = !entp;
		1723	#endif
734		1724
735	if (!entp)	1725	if (done)
		1726	{
		1727	#ifndef _WIN32
		1728	int old_errno = errno;
		1729	closedir (dirp);
		1730	errno = old_errno;
		1731
		1732	if (errno)
		1733	break;
		1734	#endif
		1735
		1736	/* sort etc. */
		1737	req->int1 = flags;
		1738	req->result = dentoffs;
		1739
		1740	if (flags & EIO_READDIR_STAT_ORDER)
		1741	eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits);
		1742	else if (flags & EIO_READDIR_DIRS_FIRST)
		1743	if (flags & EIO_READDIR_FOUND_UNKNOWN)
		1744	eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */
		1745	else
		1746	{
		1747	/* in this case, all is known, and we just put dirs first and sort them */
		1748	eio_dirent *oth = dents + dentoffs;
		1749	eio_dirent *dir = dents;
		1750
		1751	/* now partition dirs to the front, and non-dirs to the back */
		1752	/* by walking from both sides and swapping if necessary */
		1753	while (oth > dir)
		1754	{
		1755	if (dir->type == EIO_DT_DIR)
		1756	++dir;
		1757	else if ((--oth)->type == EIO_DT_DIR)
		1758	{
		1759	eio_dirent tmp = *dir; *dir = *oth; *oth = tmp;
		1760
		1761	++dir;
		1762	}
		1763	}
		1764
		1765	/* now sort the dirs only (dirs all have the same score) */
		1766	eio_dent_sort (dents, dir - dents, 0, inode_bits);
		1767	}
		1768
736	break;	1769	break;
		1770	}
737		1771
738	name = entp->d_name;	1772	/* now add the entry to our list(s) */
		1773	name = D_NAME (entp);
739		1774
		1775	/* skip . and .. entries */
740	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1776	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
741	{	1777	{
742	int len = strlen (name) + 1;	1778	int len = D_NAMLEN (entp) + 1;
743		1779
744	res++;	1780	while (ecb_expect_false (namesoffs + len > namesalloc))
745
746	while (memofs + len > memlen)
747	{	1781	{
748	memlen *= 2;	1782	namesalloc *= 2;
749	X_LOCK (wrklock);
750	req->ptr2 = names = realloc (names, memlen);	1783	req->ptr2 = names = realloc (names, namesalloc);
751	X_UNLOCK (wrklock);
752		1784
753	if (!names)	1785	if (!names)
754	break;	1786	break;
755	}	1787	}
756		1788
757	memcpy (names + memofs, name, len);	1789	memcpy (names + namesoffs, name, len);
		1790
		1791	if (dents)
		1792	{
		1793	struct eio_dirent *ent;
		1794
		1795	if (ecb_expect_false (dentoffs == dentalloc))
		1796	{
		1797	dentalloc *= 2;
		1798	req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
		1799
		1800	if (!dents)
		1801	break;
		1802	}
		1803
		1804	ent = dents + dentoffs;
		1805
		1806	ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */
		1807	ent->namelen = len - 1;
		1808	ent->inode = D_INO (entp);
		1809
		1810	inode_bits |= ent->inode;
		1811
		1812	switch (D_TYPE (entp))
		1813	{
		1814	default:
		1815	ent->type = EIO_DT_UNKNOWN;
		1816	flags |= EIO_READDIR_FOUND_UNKNOWN;
		1817	break;
		1818
		1819	#ifdef DT_FIFO
		1820	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
		1821	#endif
		1822	#ifdef DT_CHR
		1823	case DT_CHR: ent->type = EIO_DT_CHR; break;
		1824	#endif
		1825	#ifdef DT_MPC
		1826	case DT_MPC: ent->type = EIO_DT_MPC; break;
		1827	#endif
		1828	#ifdef DT_DIR
		1829	case DT_DIR: ent->type = EIO_DT_DIR; break;
		1830	#endif
		1831	#ifdef DT_NAM
		1832	case DT_NAM: ent->type = EIO_DT_NAM; break;
		1833	#endif
		1834	#ifdef DT_BLK
		1835	case DT_BLK: ent->type = EIO_DT_BLK; break;
		1836	#endif
		1837	#ifdef DT_MPB
		1838	case DT_MPB: ent->type = EIO_DT_MPB; break;
		1839	#endif
		1840	#ifdef DT_REG
		1841	case DT_REG: ent->type = EIO_DT_REG; break;
		1842	#endif
		1843	#ifdef DT_NWK
		1844	case DT_NWK: ent->type = EIO_DT_NWK; break;
		1845	#endif
		1846	#ifdef DT_CMP
		1847	case DT_CMP: ent->type = EIO_DT_CMP; break;
		1848	#endif
		1849	#ifdef DT_LNK
		1850	case DT_LNK: ent->type = EIO_DT_LNK; break;
		1851	#endif
		1852	#ifdef DT_SOCK
		1853	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
		1854	#endif
		1855	#ifdef DT_DOOR
		1856	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
		1857	#endif
		1858	#ifdef DT_WHT
		1859	case DT_WHT: ent->type = EIO_DT_WHT; break;
		1860	#endif
		1861	}
		1862
		1863	ent->score = 7;
		1864
		1865	if (flags & EIO_READDIR_DIRS_FIRST)
		1866	{
		1867	if (ent->type == EIO_DT_UNKNOWN)
		1868	{
		1869	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
		1870	ent->score = 1;
		1871	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
		1872	ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */
		1873	}
		1874	else if (ent->type == EIO_DT_DIR)
		1875	ent->score = 0;
		1876	}
		1877	}
		1878
758	memofs += len;	1879	namesoffs += len;
		1880	++dentoffs;
759	}	1881	}
		1882
		1883	if (EIO_CANCELLED (req))
		1884	{
		1885	errno = ECANCELED;
		1886	break;
		1887	}
		1888
		1889	#ifdef _WIN32
		1890	if (!FindNextFile (dirp, &entp))
		1891	{
		1892	FindClose (dirp);
		1893	dirp = 0;
		1894	}
		1895	#endif
760	}	1896	}
761
762	if (errno)
763	res = -1;
764
765	req->result = res;
766	}	1897	}
767		1898
768	/*****************************************************************************/	1899	/*****************************************************************************/
769		1900
		1901	#define ALLOC(len) \
		1902	if (!req->ptr2) \
		1903	{ \
		1904	X_LOCK (wrklock); \
		1905	req->flags |= EIO_FLAG_PTR2_FREE; \
		1906	X_UNLOCK (wrklock); \
		1907	req->ptr2 = malloc (len); \
		1908	if (!req->ptr2) \
		1909	{ \
		1910	errno = ENOMEM; \
		1911	req->result = -1; \
		1912	break; \
		1913	} \
		1914	}
		1915
770	X_THREAD_PROC (eio_proc)	1916	X_THREAD_PROC (etp_proc)
771	{	1917	{
772	eio_req *req;	1918	ETP_REQ *req;
773	struct timespec ts;	1919	struct timespec ts;
774	worker *self = (worker *)thr_arg;	1920	etp_worker *self = (etp_worker *)thr_arg;
775		1921
		1922	#if HAVE_PRCTL_SET_NAME
		1923	prctl (PR_SET_NAME, (unsigned long)"eio_thread", 0, 0, 0);
		1924	#endif
		1925
776	/* try to distribute timeouts somewhat randomly */	1926	/* try to distribute timeouts somewhat evenly */
777	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1927	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
778		1928
779	for (;;)	1929	for (;;)
780	{	1930	{
781	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1931	ts.tv_sec = 0;
782		1932
783	X_LOCK (reqlock);	1933	X_LOCK (reqlock);
784		1934
785	for (;;)	1935	for (;;)
786	{	1936	{
787	self->req = req = reqq_shift (&req_queue);	1937	self->req = req = reqq_shift (&req_queue);
788		1938
789	if (req)	1939	if (req)
790	break;	1940	break;
791		1941
		1942	if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */
		1943	{
		1944	X_UNLOCK (reqlock);
		1945	X_LOCK (wrklock);
		1946	--started;
		1947	X_UNLOCK (wrklock);
		1948	goto quit;
		1949	}
		1950
792	++idle;	1951	++idle;
793		1952
794	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1953	if (idle <= max_idle)
		1954	/* we are allowed to idle, so do so without any timeout */
		1955	X_COND_WAIT (reqwait, reqlock);
		1956	else
795	{	1957	{
796	if (idle > max_idle)	1958	/* initialise timeout once */
797	{	1959	if (!ts.tv_sec)
798	--idle;	1960	ts.tv_sec = time (0) + idle_timeout;
799	X_UNLOCK (reqlock);
800	X_LOCK (wrklock);
801	--started;
802	X_UNLOCK (wrklock);
803	goto quit;
804	}
805		1961
806	/* we are allowed to idle, so do so without any timeout */
807	X_COND_WAIT (reqwait, reqlock);	1962	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
808	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1963	ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */
809	}	1964	}
810		1965
811	--idle;	1966	--idle;
812	}	1967	}
813		1968
814	--nready;	1969	--nready;
815		1970
816	X_UNLOCK (reqlock);	1971	X_UNLOCK (reqlock);
817		1972
818	errno = 0; /* strictly unnecessary */
819
820	if (!EIO_CANCELLED (req))
821	switch (req->type)	1973	if (req->type < 0)
822	{
823	case EIO_READ: req->result = req->offs >= 0
824	? pread (req->int1, req->ptr2, req->size, req->offs)
825	: read (req->int1, req->ptr2, req->size); break;
826	case EIO_WRITE: req->result = req->offs >= 0
827	? pwrite (req->int1, req->ptr2, req->size, req->offs)
828	: write (req->int1, req->ptr2, req->size); break;
829
830	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
831	case EIO_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
832
833	case EIO_STAT: req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
834	case EIO_LSTAT: req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
835	case EIO_FSTAT: req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
836
837	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
838	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
839	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
840	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
841	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
842	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
843
844	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
845	case EIO_CLOSE: req->result = close (req->int1); break;
846	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
847	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
848	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
849	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
850	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
851	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
852	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
853	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
854	case EIO_READLINK: req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
855
856	case EIO_SYNC: req->result = 0; sync (); break;
857	case EIO_FSYNC: req->result = fsync (req->int1); break;
858	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
859
860	case EIO_READDIR: scandir_ (req, self); break;
861
862	case EIO_BUSY:
863	#ifdef _WIN32
864	Sleep (req->nv1 * 1000.);
865	#else
866	{
867	struct timeval tv;
868
869	tv.tv_sec = req->nv1;
870	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
871
872	req->result = select (0, 0, 0, 0, &tv);
873	}
874	#endif
875	break;
876
877	case EIO_UTIME:
878	case EIO_FUTIME:
879	{
880	struct timeval tv[2];
881	struct timeval *times;
882
883	if (req->nv1 != -1. || req->nv2 != -1.)
884	{
885	tv[0].tv_sec = req->nv1;
886	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
887	tv[1].tv_sec = req->nv2;
888	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
889
890	times = tv;
891	}
892	else
893	times = 0;
894
895
896	req->result = req->type == EIO_FUTIME
897	? futimes (req->int1, times)
898	: utimes (req->ptr1, times);
899	}
900
901	case EIO_GROUP:
902	case EIO_NOP:
903	break;
904
905	case EIO_QUIT:
906	goto quit;	1974	goto quit;
907		1975
908	default:	1976	ETP_EXECUTE (self, req);
909	req->result = -1;
910	break;
911	}
912
913	req->errorno = errno;
914		1977
915	X_LOCK (reslock);	1978	X_LOCK (reslock);
916		1979
917	++npending;	1980	++npending;
918		1981
919	if (!reqq_push (&res_queue, req) && want_poll_cb)	1982	if (!reqq_push (&res_queue, req) && want_poll_cb)
920	want_poll_cb ();	1983	want_poll_cb ();
921		1984
922	self->req = 0;	1985	self->req = 0;
923	worker_clear (self);	1986	etp_worker_clear (self);
924		1987
925	X_UNLOCK (reslock);	1988	X_UNLOCK (reslock);
926	}	1989	}
927		1990
928	quit:	1991	quit:
929	X_LOCK (wrklock);	1992	X_LOCK (wrklock);
930	worker_free (self);	1993	etp_worker_free (self);
931	X_UNLOCK (wrklock);	1994	X_UNLOCK (wrklock);
932		1995
933	return 0;	1996	return 0;
934	}	1997	}
935		1998
936	/*****************************************************************************/	1999	/*****************************************************************************/
937		2000
938	static void eio_atfork_prepare (void)	2001	int ecb_cold
		2002	eio_init (void (*want_poll)(void), void (*done_poll)(void))
939	{	2003	{
940	X_LOCK (wrklock);
941	X_LOCK (reqlock);
942	X_LOCK (reslock);
943	#if !HAVE_PREADWRITE	2004	#if !HAVE_PREADWRITE
944	X_LOCK (preadwritelock);
945	#endif
946	#if !HAVE_READDIR_R
947	X_LOCK (readdirlock);
948	#endif
949	}
950
951	static void eio_atfork_parent (void)
952	{
953	#if !HAVE_READDIR_R
954	X_UNLOCK (readdirlock);
955	#endif
956	#if !HAVE_PREADWRITE
957	X_UNLOCK (preadwritelock);	2005	X_MUTEX_CREATE (preadwritelock);
958	#endif	2006	#endif
959	X_UNLOCK (reslock);
960	X_UNLOCK (reqlock);
961	X_UNLOCK (wrklock);
962	}
963		2007
964	static void eio_atfork_child (void)	2008	return etp_init (want_poll, done_poll);
965	{	2009	}
966	eio_req *prv;
967		2010
968	while (prv = reqq_shift (&req_queue))	2011	ecb_inline void
969	eio_destroy (prv);	2012	eio_api_destroy (eio_req *req)
		2013	{
		2014	free (req);
		2015	}
970		2016
971	while (prv = reqq_shift (&res_queue))	2017	#define REQ(rtype) \
972	eio_destroy (prv);	2018	eio_req *req; \
		2019	\
		2020	req = (eio_req *)calloc (1, sizeof *req); \
		2021	if (!req) \
		2022	return 0; \
		2023	\
		2024	req->type = rtype; \
		2025	req->pri = pri; \
		2026	req->finish = cb; \
		2027	req->data = data; \
		2028	req->destroy = eio_api_destroy;
973		2029
974	while (wrk_first.next != &wrk_first)	2030	#define SEND eio_submit (req); return req
		2031
		2032	#define PATH \
		2033	req->flags |= EIO_FLAG_PTR1_FREE; \
		2034	req->ptr1 = strdup (path); \
		2035	if (!req->ptr1) \
		2036	{ \
		2037	eio_api_destroy (req); \
		2038	return 0; \
		2039	}
		2040
		2041	static void
		2042	eio_execute (etp_worker *self, eio_req *req)
		2043	{
		2044	if (ecb_expect_false (EIO_CANCELLED (req)))
975	{	2045	{
976	worker *wrk = wrk_first.next;	2046	req->result = -1;
977		2047	req->errorno = ECANCELED;
978	if (wrk->req)	2048	return;
979	eio_destroy (wrk->req);
980
981	worker_clear (wrk);
982	worker_free (wrk);
983	}	2049	}
984		2050
985	started = 0;	2051	switch (req->type)
986	idle = 0;	2052	{
987	nreqs = 0;	2053	case EIO_READ: ALLOC (req->size);
988	nready = 0;	2054	req->result = req->offs >= 0
989	npending = 0;	2055	? pread (req->int1, req->ptr2, req->size, req->offs)
		2056	: read (req->int1, req->ptr2, req->size); break;
		2057	case EIO_WRITE: req->result = req->offs >= 0
		2058	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		2059	: write (req->int1, req->ptr2, req->size); break;
990		2060
991	eio_atfork_parent ();	2061	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
992	}	2062	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break;
993		2063
994	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	2064	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
995	{	2065	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
996	want_poll_cb = want_poll;	2066	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
997	done_poll_cb = done_poll;	2067	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		2068	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		2069	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
998		2070
		2071	case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		2072	req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		2073	case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS));
		2074	req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break;
		2075
		2076	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		2077	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		2078	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
		2079	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
		2080	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		2081	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		2082
		2083	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
		2084	case EIO_CLOSE: req->result = close (req->int1); break;
		2085	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		2086	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		2087	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		2088	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		2089	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		2090	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		2091	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		2092	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
		2093
		2094	case EIO_REALPATH: eio__realpath (req, self); break;
		2095
		2096	case EIO_READLINK: ALLOC (PATH_MAX);
		2097	req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break;
		2098
		2099	case EIO_SYNC: req->result = 0; sync (); break;
		2100	case EIO_FSYNC: req->result = fsync (req->int1); break;
		2101	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		2102	case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break;
		2103	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		2104	case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break;
		2105	case EIO_MTOUCH: req->result = eio__mtouch (req); break;
		2106	case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break;
		2107	case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break;
		2108	case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break;
		2109
		2110	case EIO_READDIR: eio__scandir (req, self); break;
		2111
		2112	case EIO_BUSY:
999	#ifdef _WIN32	2113	#ifdef _WIN32
1000	X_MUTEX_CHECK (wrklock);	2114	Sleep (req->nv1 * 1e3);
1001	X_MUTEX_CHECK (reslock);	2115	#else
1002	X_MUTEX_CHECK (reqlock);	2116	{
1003	X_MUTEX_CHECK (reqwait);	2117	struct timeval tv;
1004	X_MUTEX_CHECK (preadwritelock);
1005	X_MUTEX_CHECK (readdirlock);
1006		2118
1007	X_COND_CHECK (reqwait);	2119	tv.tv_sec = req->nv1;
1008	#endif	2120	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6;
1009		2121
1010	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);	2122	req->result = select (0, 0, 0, 0, &tv);
1011	}	2123	}
		2124	#endif
		2125	break;
1012		2126
1013	#if 0	2127	case EIO_UTIME:
		2128	case EIO_FUTIME:
		2129	{
		2130	struct timeval tv[2];
		2131	struct timeval *times;
1014		2132
		2133	if (req->nv1 != -1. || req->nv2 != -1.)
		2134	{
		2135	tv[0].tv_sec = req->nv1;
		2136	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		2137	tv[1].tv_sec = req->nv2;
		2138	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		2139
		2140	times = tv;
		2141	}
		2142	else
		2143	times = 0;
		2144
		2145	req->result = req->type == EIO_FUTIME
		2146	? futimes (req->int1, times)
		2147	: utimes (req->ptr1, times);
		2148	}
		2149	break;
		2150
		2151	case EIO_GROUP:
		2152	abort (); /* handled in eio_request */
		2153
		2154	case EIO_NOP:
		2155	req->result = 0;
		2156	break;
		2157
		2158	case EIO_CUSTOM:
		2159	req->feed (req);
		2160	break;
		2161
		2162	default:
		2163	errno = ENOSYS;
		2164	req->result = -1;
		2165	break;
		2166	}
		2167
		2168	req->errorno = errno;
		2169	}
		2170
		2171	#ifndef EIO_NO_WRAPPERS
		2172
		2173	eio_req *eio_nop (int pri, eio_cb cb, void *data)
		2174	{
		2175	REQ (EIO_NOP); SEND;
		2176	}
		2177
		2178	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
		2179	{
		2180	REQ (EIO_BUSY); req->nv1 = delay; SEND;
		2181	}
		2182
1015	eio_req *eio_fsync (int fd, eio_cb cb);	2183	eio_req *eio_sync (int pri, eio_cb cb, void *data)
		2184	{
		2185	REQ (EIO_SYNC); SEND;
		2186	}
		2187
		2188	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		2189	{
		2190	REQ (EIO_FSYNC); req->int1 = fd; SEND;
		2191	}
		2192
		2193	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2194	{
		2195	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2196	}
		2197
1016	eio_req *eio_fdatasync (int fd, eio_cb cb);	2198	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1017	eio_req *eio_dupclose (int fd, eio_cb cb);	2199	{
		2200	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
		2201	}
		2202
		2203	eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data)
		2204	{
		2205	REQ (EIO_SYNCFS); req->int1 = fd; SEND;
		2206	}
		2207
		2208	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		2209	{
		2210	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		2211	}
		2212
		2213	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		2214	{
		2215	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		2216	}
		2217
		2218	eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data)
		2219	{
		2220	REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND;
		2221	}
		2222
		2223	eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data)
		2224	{
		2225	REQ (EIO_MLOCKALL); req->int1 = flags; SEND;
		2226	}
		2227
		2228	eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data)
		2229	{
		2230	REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND;
		2231	}
		2232
		2233	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		2234	{
		2235	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		2236	}
		2237
1018	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb);	2238	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
1019	eio_req *eio_read (int fd, off_t offs, size_t length, char *data, eio_cb cb);	2239	{
1020	eio_req *eio_write (int fd, off_t offs, size_t length, char *data, eio_cb cb);	2240	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
1021	eio_req *eio_fstat (int fd, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */	2241	}
		2242
		2243	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		2244	{
		2245	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		2246	}
		2247
		2248	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		2249	{
		2250	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		2251	}
		2252
		2253	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
		2254	{
		2255	REQ (EIO_FSTAT); req->int1 = fd; SEND;
		2256	}
		2257
		2258	eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data)
		2259	{
		2260	REQ (EIO_FSTATVFS); req->int1 = fd; SEND;
		2261	}
		2262
1022	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb);	2263	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
		2264	{
		2265	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
		2266	}
		2267
1023	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb);	2268	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
		2269	{
		2270	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
		2271	}
		2272
1024	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb);	2273	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
		2274	{
		2275	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
		2276	}
		2277
1025	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb);	2278	eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
		2279	{
		2280	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		2281	}
		2282
1026	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb);	2283	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
		2284	{
		2285	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
		2286	}
		2287
1027	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb);	2288	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
		2289	{
		2290	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
		2291	}
		2292
1028	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb);	2293	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
1029	eio_req *eio_readlink (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */	2294	{
1030	eio_req *eio_stat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */	2295	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
1031	eio_req *eio_lstat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */	2296	}
		2297
1032	eio_req *eio_utime (const char *path, double atime, double mtime, eio_cb cb);	2298	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
		2299	{
		2300	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
		2301	}
		2302
1033	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb);	2303	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
		2304	{
		2305	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
		2306	}
		2307
		2308	eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data)
		2309	{
		2310	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		2311	}
		2312
1034	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb);	2313	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
		2314	{
		2315	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
		2316	}
		2317
1035	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb);	2318	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1036	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb);	2319	{
		2320	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
		2321	}
		2322
		2323	static eio_req *
		2324	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
		2325	{
		2326	REQ (type); PATH; SEND;
		2327	}
		2328
		2329	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		2330	{
		2331	return eio__1path (EIO_READLINK, path, pri, cb, data);
		2332	}
		2333
		2334	eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data)
		2335	{
		2336	return eio__1path (EIO_REALPATH, path, pri, cb, data);
		2337	}
		2338
		2339	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		2340	{
		2341	return eio__1path (EIO_STAT, path, pri, cb, data);
		2342	}
		2343
		2344	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		2345	{
		2346	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		2347	}
		2348
		2349	eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data)
		2350	{
		2351	return eio__1path (EIO_STATVFS, path, pri, cb, data);
		2352	}
		2353
1037	eio_req *eio_unlink (const char *path, eio_cb cb);	2354	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		2355	{
		2356	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		2357	}
		2358
1038	eio_req *eio_rmdir (const char *path, eio_cb cb);	2359	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
1039	eio_req *eio_readdir (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */	2360	{
		2361	return eio__1path (EIO_RMDIR, path, pri, cb, data);
		2362	}
		2363
		2364	eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data)
		2365	{
		2366	REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
		2367	}
		2368
1040	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb);	2369	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1041	eio_req *eio_busy (double delay, eio_cb cb); /* ties a thread for this long, simulating busyness */	2370	{
1042	eio_req *eio_nop (eio_cb cb); /* does nothing except go through the whole process */	2371	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND;
		2372	}
		2373
		2374	static eio_req *
		2375	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2376	{
		2377	REQ (type); PATH;
		2378
		2379	req->flags |= EIO_FLAG_PTR2_FREE;
		2380	req->ptr2 = strdup (new_path);
		2381	if (!req->ptr2)
		2382	{
		2383	eio_api_destroy (req);
		2384	return 0;
		2385	}
		2386
		2387	SEND;
		2388	}
		2389
		2390	eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2391	{
		2392	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
		2393	}
		2394
		2395	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2396	{
		2397	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
		2398	}
		2399
		2400	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		2401	{
		2402	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
		2403	}
		2404
		2405	eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data)
		2406	{
		2407	REQ (EIO_CUSTOM); req->feed = execute; SEND;
		2408	}
		2409
		2410	#endif
		2411
		2412	eio_req *eio_grp (eio_cb cb, void *data)
		2413	{
		2414	const int pri = EIO_PRI_MAX;
		2415
		2416	REQ (EIO_GROUP); SEND;
		2417	}
		2418
		2419	#undef REQ
		2420	#undef PATH
		2421	#undef SEND
		2422
		2423	/*****************************************************************************/
		2424	/* grp functions */
		2425
1043	void	2426	void
1044	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1045	PROTOTYPE: $$$;$
1046	PPCODE:
1047	{
1048	dREQ;
1049
1050	req->type = EIO_OPEN;
1051	req->sv1 = newSVsv (pathname);
1052	req->ptr1 = SvPVbyte_nolen (req->sv1);
1053	req->int1 = flags;
1054	req->int2 = mode;
1055
1056	EIO_SEND;
1057	}
1058
1059	void
1060	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1061	PROTOTYPE: $;$
1062	ALIAS:
1063	aio_fsync = EIO_FSYNC
1064	aio_fdatasync = EIO_FDATASYNC
1065	PPCODE:
1066	{
1067	dREQ;
1068
1069	req->type = ix;
1070	req->sv1 = newSVsv (fh);
1071	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1072
1073	EIO_SEND (req);
1074	}
1075
1076	void
1077	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1078	PROTOTYPE: $;$
1079	PPCODE:
1080	{
1081	dREQ;
1082
1083	req->type = EIO_CLOSE;
1084	req->sv1 = newSVsv (fh);
1085	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1086
1087	EIO_SEND (req);
1088	}
1089
1090	void
1091	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1092	ALIAS:
1093	aio_read = EIO_READ
1094	aio_write = EIO_WRITE
1095	PROTOTYPE: $$$$$;$
1096	PPCODE:
1097	{
1098	STRLEN svlen;
1099	char *svptr = SvPVbyte (data, svlen);
1100	UV len = SvUV (length);
1101
1102	SvUPGRADE (data, SVt_PV);
1103	SvPOK_on (data);
1104
1105	if (dataoffset < 0)
1106	dataoffset += svlen;
1107
1108	if (dataoffset < 0 || dataoffset > svlen)
1109	croak ("dataoffset outside of data scalar");
1110
1111	if (ix == EIO_WRITE)
1112	{
1113	/* write: check length and adjust. */
1114	if (!SvOK (length) || len + dataoffset > svlen)
1115	len = svlen - dataoffset;
1116	}
1117	else
1118	{
1119	/* read: grow scalar as necessary */
1120	svptr = SvGROW (data, len + dataoffset + 1);
1121	}
1122
1123	if (len < 0)
1124	croak ("length must not be negative");
1125
1126	{
1127	dREQ;
1128
1129	req->type = ix;
1130	req->sv1 = newSVsv (fh);
1131	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1132	: IoOFP (sv_2io (fh)));
1133	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1134	req->size = len;
1135	req->sv2 = SvREFCNT_inc (data);
1136	req->ptr2 = (char *)svptr + dataoffset;
1137	req->stroffset = dataoffset;
1138
1139	if (!SvREADONLY (data))
1140	{
1141	SvREADONLY_on (data);
1142	req->flags |= FLAG_SV2_RO_OFF;
1143	}
1144
1145	EIO_SEND;
1146	}
1147	}
1148
1149	void
1150	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1151	PROTOTYPE: $$;$
1152	PPCODE:
1153	{
1154	SV *data;
1155	dREQ;
1156
1157	data = newSV (NAME_MAX);
1158	SvPOK_on (data);
1159
1160	req->type = EIO_READLINK;
1161	req->sv1 = newSVsv (path);
1162	req->ptr1 = SvPVbyte_nolen (req->sv1);
1163	req->sv2 = data;
1164	req->ptr2 = SvPVbyte_nolen (data);
1165
1166	EIO_SEND;
1167	}
1168
1169	void
1170	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1171	PROTOTYPE: $$$$;$
1172	PPCODE:
1173	{
1174	dREQ;
1175
1176	req->type = EIO_SENDFILE;
1177	req->sv1 = newSVsv (out_fh);
1178	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1179	req->sv2 = newSVsv (in_fh);
1180	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1181	req->offs = SvVAL64 (in_offset);
1182	req->size = length;
1183
1184	EIO_SEND;
1185	}
1186
1187	void
1188	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1189	PROTOTYPE: $$$;$
1190	PPCODE:
1191	{
1192	dREQ;
1193
1194	req->type = EIO_READAHEAD;
1195	req->sv1 = newSVsv (fh);
1196	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1197	req->offs = SvVAL64 (offset);
1198	req->size = length;
1199
1200	EIO_SEND;
1201	}
1202
1203	void
1204	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1205	ALIAS:
1206	aio_stat = EIO_STAT
1207	aio_lstat = EIO_LSTAT
1208	PPCODE:
1209	{
1210	dREQ;
1211
1212	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1213	if (!req->ptr2)
1214	{
1215	req_destroy (req);
1216	croak ("out of memory during aio_stat statdata allocation");
1217	}
1218
1219	req->flags |= FLAG_PTR2_FREE;
1220	req->sv1 = newSVsv (fh_or_path);
1221
1222	if (SvPOK (fh_or_path))
1223	{
1224	req->type = ix;
1225	req->ptr1 = SvPVbyte_nolen (req->sv1);
1226	}
1227	else
1228	{
1229	req->type = EIO_FSTAT;
1230	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1231	}
1232
1233	EIO_SEND;
1234	}
1235
1236	void
1237	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1238	PPCODE:
1239	{
1240	dREQ;
1241
1242	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1243	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1244	req->sv1 = newSVsv (fh_or_path);
1245
1246	if (SvPOK (fh_or_path))
1247	{
1248	req->type = EIO_UTIME;
1249	req->ptr1 = SvPVbyte_nolen (req->sv1);
1250	}
1251	else
1252	{
1253	req->type = EIO_FUTIME;
1254	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1255	}
1256
1257	EIO_SEND;
1258	}
1259
1260	void
1261	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1262	PPCODE:
1263	{
1264	dREQ;
1265
1266	req->sv1 = newSVsv (fh_or_path);
1267	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1268
1269	if (SvPOK (fh_or_path))
1270	{
1271	req->type = EIO_TRUNCATE;
1272	req->ptr1 = SvPVbyte_nolen (req->sv1);
1273	}
1274	else
1275	{
1276	req->type = EIO_FTRUNCATE;
1277	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1278	}
1279
1280	EIO_SEND;
1281	}
1282
1283	void
1284	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1285	ALIAS:
1286	aio_chmod = EIO_CHMOD
1287	aio_fchmod = EIO_FCHMOD
1288	aio_mkdir = EIO_MKDIR
1289	PPCODE:
1290	{
1291	dREQ;
1292
1293	req->type = type;
1294	req->int2 = mode;
1295	req->sv1 = newSVsv (fh_or_path);
1296
1297	if (ix == EIO_FCHMOD)
1298	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1299	else
1300	req->ptr1 = SvPVbyte_nolen (req->sv1);
1301
1302	EIO_SEND;
1303	}
1304
1305	void
1306	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1307	PPCODE:
1308	{
1309	dREQ;
1310
1311	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1312	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1313	req->sv1 = newSVsv (fh_or_path);
1314
1315	if (SvPOK (fh_or_path))
1316	{
1317	req->type = EIO_CHOWN;
1318	req->ptr1 = SvPVbyte_nolen (req->sv1);
1319	}
1320	else
1321	{
1322	req->type = EIO_FCHOWN;
1323	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1324	}
1325
1326	EIO_SEND;
1327	}
1328
1329	void
1330	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1331	ALIAS:
1332	aio_unlink = EIO_UNLINK
1333	aio_rmdir = EIO_RMDIR
1334	aio_readdir = EIO_READDIR
1335	PPCODE:
1336	{
1337	dREQ;
1338
1339	req->type = ix;
1340	req->sv1 = newSVsv (pathname);
1341	req->ptr1 = SvPVbyte_nolen (req->sv1);
1342
1343	EIO_SEND;
1344	}
1345
1346	void
1347	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1348	ALIAS:
1349	aio_link = EIO_LINK
1350	aio_symlink = EIO_SYMLINK
1351	aio_rename = EIO_RENAME
1352	PPCODE:
1353	{
1354	dREQ;
1355
1356	req->type = ix;
1357	req->sv1 = newSVsv (oldpath);
1358	req->ptr1 = SvPVbyte_nolen (req->sv1);
1359	req->sv2 = newSVsv (newpath);
1360	req->ptr2 = SvPVbyte_nolen (req->sv2);
1361
1362	EIO_SEND;
1363	}
1364
1365	void
1366	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1367	PPCODE:
1368	{
1369	dREQ;
1370
1371	req->type = EIO_MKNOD;
1372	req->sv1 = newSVsv (pathname);
1373	req->ptr1 = SvPVbyte_nolen (req->sv1);
1374	req->int2 = (mode_t)mode;
1375	req->offs = dev;
1376
1377	EIO_SEND;
1378	}
1379
1380	void
1381	aio_busy (double delay, SV *callback=&PL_sv_undef)
1382	PPCODE:
1383	{
1384	dREQ;
1385
1386	req->type = EIO_BUSY;
1387	req->nv1 = delay < 0. ? 0. : delay;
1388
1389	EIO_SEND;
1390	}
1391
1392	void
1393	aio_group (SV *callback=&PL_sv_undef)
1394	PROTOTYPE: ;$
1395	PPCODE:
1396	{
1397	dREQ;
1398
1399	req->type = EIO_GROUP;
1400
1401	req_send (req);
1402	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1403	}
1404
1405	void
1406	aio_nop (SV *callback=&PL_sv_undef)
1407	ALIAS:
1408	aio_nop = EIO_NOP
1409	aio_sync = EIO_SYNC
1410	PPCODE:
1411	{
1412	dREQ;
1413
1414	#endif
1415
1416	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	2427	eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1417	{	2428	{
1418	grp->int2 = limit;	2429	grp->int2 = limit;
1419	grp->feed = feed;	2430	grp->feed = feed;
1420		2431
1421	grp_try_feed (grp);	2432	grp_try_feed (grp);
1422	}	2433	}
1423		2434
		2435	void
1424	void eio_grp_limit (eio_req *grp, int limit)	2436	eio_grp_limit (eio_req *grp, int limit)
1425	{	2437	{
1426	grp->int2 = limit;	2438	grp->int2 = limit;
1427		2439
1428	grp_try_feed (grp);	2440	grp_try_feed (grp);
1429	}	2441	}
1430		2442
		2443	void
1431	void eio_grp_add (eio_req *grp, eio_req *req)	2444	eio_grp_add (eio_req *grp, eio_req *req)
1432	{	2445	{
1433	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	2446	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
		2447
		2448	grp->flags |= EIO_FLAG_GROUPADD;
1434		2449
1435	++grp->size;	2450	++grp->size;
1436	req->grp = grp;	2451	req->grp = grp;
1437		2452
1438	req->grp_prev = 0;	2453	req->grp_prev = 0;
…		…
1442	grp->grp_first->grp_prev = req;	2457	grp->grp_first->grp_prev = req;
1443		2458
1444	grp->grp_first = req;	2459	grp->grp_first = req;
1445	}	2460	}
1446		2461
		2462	/*****************************************************************************/
		2463	/* misc garbage */
1447		2464
		2465	eio_ssize_t
		2466	eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		2467	{
		2468	return eio__sendfile (ofd, ifd, offset, count);
		2469	}
		2470

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