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Comparing libeio/eio.c (file contents):
Revision 1.6 by root, Sun May 11 19:11:05 2008 UTC vs.
Revision 1.37 by root, Fri Jun 12 16:48:08 2009 UTC

		1	/*
		2	* libeio implementation
		3	*
		4	* Copyright (c) 2007,2008,2009 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
1	#include "eio.h"	40	#include "eio.h"
		41
		42	#ifdef EIO_STACKSIZE
		43	# define XTHREAD_STACKSIZE EIO_STACKSIZE
		44	#endif
2	#include "xthread.h"	45	#include "xthread.h"
3		46
4	#include <errno.h>	47	#include <errno.h>
5	#include <stddef.h>	48	#include <stddef.h>
6	#include <stdlib.h>	49	#include <stdlib.h>
…		…
8	#include <errno.h>	51	#include <errno.h>
9	#include <sys/types.h>	52	#include <sys/types.h>
10	#include <sys/stat.h>	53	#include <sys/stat.h>
11	#include <limits.h>	54	#include <limits.h>
12	#include <fcntl.h>	55	#include <fcntl.h>
13	#include <sched.h>	56	#include <assert.h>
14		57
15	#ifndef EIO_FINISH	58	#ifndef EIO_FINISH
16	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	59	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
17	#endif	60	#endif
18		61
…		…
25	#endif	68	#endif
26		69
27	#ifdef _WIN32	70	#ifdef _WIN32
28		71
29	/*doh*/	72	/*doh*/
30
31	#else	73	#else
32		74
33	# include "config.h"	75	# include "config.h"
34	# include <sys/time.h>	76	# include <sys/time.h>
35	# include <sys/select.h>	77	# include <sys/select.h>
		78	# include <sys/mman.h>
36	# include <unistd.h>	79	# include <unistd.h>
37	# include <utime.h>	80	# include <utime.h>
38	# include <signal.h>	81	# include <signal.h>
39	# include <dirent.h>	82	# include <dirent.h>
40		83
		84	/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */
		85	# if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
		86	# define _DIRENT_HAVE_D_TYPE /* sigh */
		87	# define D_INO(de) (de)->d_fileno
		88	# define D_NAMLEN(de) (de)->d_namlen
		89	# elif defined(__linux) || defined(d_ino) || _XOPEN_SOURCE >= 600
		90	# define D_INO(de) (de)->d_ino
		91	# endif
		92
		93	#ifdef _D_EXACT_NAMLEN
		94	# undef D_NAMLEN
		95	# define D_NAMLEN(de) _D_EXACT_NAMLEN (de)
		96	#endif
		97
		98	# ifdef _DIRENT_HAVE_D_TYPE
		99	# define D_TYPE(de) (de)->d_type
		100	# endif
		101
41	# ifndef EIO_STRUCT_DIRENT	102	# ifndef EIO_STRUCT_DIRENT
42	# define EIO_STRUCT_DIRENT struct dirent	103	# define EIO_STRUCT_DIRENT struct dirent
43	# endif	104	# endif
44		105
45	#endif	106	#endif
46
47	# ifndef EIO_STRUCT_STAT
48	# define EIO_STRUCT_STAT struct stat
49	# endif
50		107
51	#if HAVE_SENDFILE	108	#if HAVE_SENDFILE
52	# if __linux	109	# if __linux
53	# include <sys/sendfile.h>	110	# include <sys/sendfile.h>
54	# elif __freebsd	111	# elif __freebsd
…		…
61	# else	118	# else
62	# error sendfile support requested but not available	119	# error sendfile support requested but not available
63	# endif	120	# endif
64	#endif	121	#endif
65		122
		123	#ifndef D_TYPE
		124	# define D_TYPE(de) 0
		125	#endif
		126	#ifndef D_INO
		127	# define D_INO(de) 0
		128	#endif
		129	#ifndef D_NAMLEN
		130	# define D_NAMLEN(de) strlen ((de)->d_name)
		131	#endif
		132
66	/* number of seconds after which an idle threads exit */	133	/* number of seconds after which an idle threads exit */
67	#define IDLE_TIMEOUT 10	134	#define IDLE_TIMEOUT 10
68		135
69	/* used for struct dirent, AIX doesn't provide it */	136	/* used for struct dirent, AIX doesn't provide it */
70	#ifndef NAME_MAX	137	#ifndef NAME_MAX
…		…
74	/* buffer size for various temporary buffers */	141	/* buffer size for various temporary buffers */
75	#define EIO_BUFSIZE 65536	142	#define EIO_BUFSIZE 65536
76		143
77	#define dBUF \	144	#define dBUF \
78	char *eio_buf; \	145	char *eio_buf; \
79	X_LOCK (wrklock); \	146	ETP_WORKER_LOCK (self); \
80	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	147	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \
81	X_UNLOCK (wrklock); \	148	ETP_WORKER_UNLOCK (self); \
		149	errno = ENOMEM; \
82	if (!eio_buf) \	150	if (!eio_buf) \
83	return -1;	151	return -1;
84		152
85	#define EIO_TICKS ((1000000 + 1023) >> 10)	153	#define EIO_TICKS ((1000000 + 1023) >> 10)
86		154
		155	/*****************************************************************************/
		156
		157	#if __GNUC__ >= 3
		158	# define expect(expr,value) __builtin_expect ((expr),(value))
		159	#else
		160	# define expect(expr,value) (expr)
		161	#endif
		162
		163	#define expect_false(expr) expect ((expr) != 0, 0)
		164	#define expect_true(expr) expect ((expr) != 0, 1)
		165
		166	/*****************************************************************************/
		167
		168	#define ETP_PRI_MIN EIO_PRI_MIN
		169	#define ETP_PRI_MAX EIO_PRI_MAX
		170
		171	struct etp_worker;
		172
		173	#define ETP_REQ eio_req
		174	#define ETP_DESTROY(req) eio_destroy (req)
		175	static int eio_finish (eio_req *req);
		176	#define ETP_FINISH(req) eio_finish (req)
		177	static void eio_execute (struct etp_worker *self, eio_req *req);
		178	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		179
		180	#define ETP_WORKER_CLEAR(req) \
		181	if (wrk->dbuf) \
		182	{ \
		183	free (wrk->dbuf); \
		184	wrk->dbuf = 0; \
		185	} \
		186	\
		187	if (wrk->dirp) \
		188	{ \
		189	closedir (wrk->dirp); \
		190	wrk->dirp = 0; \
		191	}
		192
		193	#define ETP_WORKER_COMMON \
		194	void *dbuf; \
		195	DIR *dirp;
		196
		197	/*****************************************************************************/
		198
		199	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		200
		201	/* calculcate time difference in ~1/EIO_TICKS of a second */
		202	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		203	{
		204	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		205	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		206	}
		207
		208	static unsigned int started, idle, wanted = 4;
		209
87	static void (*want_poll_cb) (void);	210	static void (*want_poll_cb) (void);
88	static void (*done_poll_cb) (void);	211	static void (*done_poll_cb) (void);
89		212
90	static unsigned int max_poll_time = 0;	213	static unsigned int max_poll_time; /* reslock */
91	static unsigned int max_poll_reqs = 0;	214	static unsigned int max_poll_reqs; /* reslock */
92		215
93	/* calculcate time difference in ~1/EIO_TICKS of a second */	216	static volatile unsigned int nreqs; /* reqlock */
94	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	217	static volatile unsigned int nready; /* reqlock */
95	{	218	static volatile unsigned int npending; /* reqlock */
96	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	219	static volatile unsigned int max_idle = 4;
97	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
98	}
99		220
100	static unsigned int started, idle, wanted;
101
102	/* worker threads management */
103	static mutex_t wrklock = X_MUTEX_INIT;	221	static mutex_t wrklock = X_MUTEX_INIT;
104
105	typedef struct worker {
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)
120	{
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	}
133
134	static void worker_free (worker *wrk)
135	{
136	wrk->next->prev = wrk->prev;
137	wrk->prev->next = wrk->next;
138
139	free (wrk);
140	}
141
142	static volatile unsigned int nreqs, nready, npending;
143	static volatile unsigned int max_idle = 4;
144
145	static mutex_t reslock = X_MUTEX_INIT;	222	static mutex_t reslock = X_MUTEX_INIT;
146	static mutex_t reqlock = X_MUTEX_INIT;	223	static mutex_t reqlock = X_MUTEX_INIT;
147	static cond_t reqwait = X_COND_INIT;	224	static cond_t reqwait = X_COND_INIT;
148		225
		226	#if !HAVE_PREADWRITE
		227	/*
		228	* make our pread/pwrite emulation safe against themselves, but not against
		229	* normal read/write by using a mutex. slows down execution a lot,
		230	* but that's your problem, not mine.
		231	*/
		232	static mutex_t preadwritelock = X_MUTEX_INIT;
		233	#endif
		234
		235	typedef struct etp_worker
		236	{
		237	/* locked by wrklock */
		238	struct etp_worker *prev, *next;
		239
		240	thread_t tid;
		241
		242	/* locked by reslock, reqlock or wrklock */
		243	ETP_REQ *req; /* currently processed request */
		244
		245	ETP_WORKER_COMMON
		246	} etp_worker;
		247
		248	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
		249
		250	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		251	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
		252
		253	/* worker threads management */
		254
		255	static void etp_worker_clear (etp_worker *wrk)
		256	{
		257	ETP_WORKER_CLEAR (wrk);
		258	}
		259
		260	static void etp_worker_free (etp_worker *wrk)
		261	{
		262	wrk->next->prev = wrk->prev;
		263	wrk->prev->next = wrk->next;
		264
		265	free (wrk);
		266	}
		267
149	unsigned int eio_nreqs (void)	268	static unsigned int etp_nreqs (void)
150	{	269	{
		270	int retval;
		271	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		272	retval = nreqs;
		273	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
151	return nreqs;	274	return retval;
152	}	275	}
153		276
154	unsigned int eio_nready (void)	277	static unsigned int etp_nready (void)
155	{	278	{
156	unsigned int retval;	279	unsigned int retval;
157		280
158	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	281	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
159	retval = nready;	282	retval = nready;
160	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	283	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
161		284
162	return retval;	285	return retval;
163	}	286	}
164		287
165	unsigned int eio_npending (void)	288	static unsigned int etp_npending (void)
166	{	289	{
167	unsigned int retval;	290	unsigned int retval;
168		291
169	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	292	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
170	retval = npending;	293	retval = npending;
171	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	294	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
172		295
173	return retval;	296	return retval;
174	}	297	}
175		298
176	unsigned int eio_nthreads (void)	299	static unsigned int etp_nthreads (void)
177	{	300	{
178	unsigned int retval;	301	unsigned int retval;
179		302
180	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	303	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
181	retval = started;	304	retval = started;
…		…
188	* a somewhat faster data structure might be nice, but	311	* a somewhat faster data structure might be nice, but
189	* with 8 priorities this actually needs <20 insns	312	* with 8 priorities this actually needs <20 insns
190	* per shift, the most expensive operation.	313	* per shift, the most expensive operation.
191	*/	314	*/
192	typedef struct {	315	typedef struct {
193	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	316	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
194	int size;	317	int size;
195	} reqq;	318	} etp_reqq;
196		319
197	static reqq req_queue;	320	static etp_reqq req_queue;
198	static reqq res_queue;	321	static etp_reqq res_queue;
199		322
200	static int reqq_push (reqq *q, eio_req *req)	323	static int reqq_push (etp_reqq *q, ETP_REQ *req)
201	{	324	{
202	int pri = req->pri;	325	int pri = req->pri;
203	req->next = 0;	326	req->next = 0;
204		327
205	if (q->qe[pri])	328	if (q->qe[pri])
…		…
211	q->qe[pri] = q->qs[pri] = req;	334	q->qe[pri] = q->qs[pri] = req;
212		335
213	return q->size++;	336	return q->size++;
214	}	337	}
215		338
216	static eio_req *reqq_shift (reqq *q)	339	static ETP_REQ *reqq_shift (etp_reqq *q)
217	{	340	{
218	int pri;	341	int pri;
219		342
220	if (!q->size)	343	if (!q->size)
221	return 0;	344	return 0;
222		345
223	--q->size;	346	--q->size;
224		347
225	for (pri = EIO_NUM_PRI; pri--; )	348	for (pri = ETP_NUM_PRI; pri--; )
226	{	349	{
227	eio_req *req = q->qs[pri];	350	eio_req *req = q->qs[pri];
228		351
229	if (req)	352	if (req)
230	{	353	{
…		…
236	}	359	}
237		360
238	abort ();	361	abort ();
239	}	362	}
240		363
241	static void grp_try_feed (eio_req *grp)	364	static void etp_atfork_prepare (void)
242	{	365	{
243	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	366	X_LOCK (wrklock);
		367	X_LOCK (reqlock);
		368	X_LOCK (reslock);
		369	#if !HAVE_PREADWRITE
		370	X_LOCK (preadwritelock);
		371	#endif
		372	}
		373
		374	static void etp_atfork_parent (void)
		375	{
		376	#if !HAVE_PREADWRITE
		377	X_UNLOCK (preadwritelock);
		378	#endif
		379	X_UNLOCK (reslock);
		380	X_UNLOCK (reqlock);
		381	X_UNLOCK (wrklock);
		382	}
		383
		384	static void etp_atfork_child (void)
		385	{
		386	ETP_REQ *prv;
		387
		388	while ((prv = reqq_shift (&req_queue)))
		389	ETP_DESTROY (prv);
		390
		391	while ((prv = reqq_shift (&res_queue)))
		392	ETP_DESTROY (prv);
		393
		394	while (wrk_first.next != &wrk_first)
244	{	395	{
245	int old_len = grp->size;	396	etp_worker *wrk = wrk_first.next;
246		397
247	EIO_FEED (grp);	398	if (wrk->req)
		399	ETP_DESTROY (wrk->req);
248		400
249	/* stop if no progress has been made */	401	etp_worker_clear (wrk);
250	if (old_len == grp->size)	402	etp_worker_free (wrk);
251	{
252	grp->feed = 0;
253	break;
254	}
255	}	403	}
256	}
257		404
258	static int eio_finish (eio_req *req);	405	started = 0;
		406	idle = 0;
		407	nreqs = 0;
		408	nready = 0;
		409	npending = 0;
259		410
260	static int grp_dec (eio_req *grp)	411	etp_atfork_parent ();
261	{	412	}
262	--grp->size;
263		413
264	/* call feeder, if applicable */	414	static void
265	grp_try_feed (grp);	415	etp_once_init (void)
		416	{
		417	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
		418	}
266		419
267	/* finish, if done */	420	static int
268	if (!grp->size && grp->int1)	421	etp_init (void (*want_poll)(void), void (*done_poll)(void))
269	return eio_finish (grp);	422	{
270	else	423	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
		424
		425	pthread_once (&doinit, etp_once_init);
		426
		427	want_poll_cb = want_poll;
		428	done_poll_cb = done_poll;
		429
271	return 0;	430	return 0;
272	}	431	}
273		432
274	void eio_destroy (eio_req *req)
275	{
276	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
277	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
278
279	EIO_DESTROY (req);
280	}
281
282	static int eio_finish (eio_req *req)
283	{
284	int res = EIO_FINISH (req);
285
286	if (req->grp)
287	{
288	int res2;
289	eio_req *grp = req->grp;
290
291	/* unlink request */
292	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
293	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
294
295	if (grp->grp_first == req)
296	grp->grp_first = req->grp_next;
297
298	res2 = grp_dec (grp);
299
300	if (!res && res2)
301	res = res2;
302	}
303
304	eio_destroy (req);
305
306	return res;
307	}
308
309	void eio_grp_cancel (eio_req *grp)
310	{
311	for (grp = grp->grp_first; grp; grp = grp->grp_next)
312	eio_cancel (grp);
313	}
314
315	void eio_cancel (eio_req *req)
316	{
317	X_LOCK (wrklock);
318	req->flags |= EIO_FLAG_CANCELLED;
319	X_UNLOCK (wrklock);
320
321	eio_grp_cancel (req);
322	}
323
324	X_THREAD_PROC (eio_proc);	433	X_THREAD_PROC (etp_proc);
325		434
326	static void start_thread (void)	435	static void etp_start_thread (void)
327	{	436	{
328	worker *wrk = calloc (1, sizeof (worker));	437	etp_worker *wrk = calloc (1, sizeof (etp_worker));
329		438
330	if (!wrk)	439	/*TODO*/
331	croak ("unable to allocate worker thread data");	440	assert (("unable to allocate worker thread data", wrk));
332		441
333	X_LOCK (wrklock);	442	X_LOCK (wrklock);
334		443
335	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	444	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
336	{	445	{
337	wrk->prev = &wrk_first;	446	wrk->prev = &wrk_first;
338	wrk->next = wrk_first.next;	447	wrk->next = wrk_first.next;
339	wrk_first.next->prev = wrk;	448	wrk_first.next->prev = wrk;
340	wrk_first.next = wrk;	449	wrk_first.next = wrk;
…		…
344	free (wrk);	453	free (wrk);
345		454
346	X_UNLOCK (wrklock);	455	X_UNLOCK (wrklock);
347	}	456	}
348		457
349	static void maybe_start_thread (void)	458	static void etp_maybe_start_thread (void)
350	{	459	{
351	if (eio_nthreads () >= wanted)	460	if (expect_true (etp_nthreads () >= wanted))
352	return;	461	return;
353		462
354	/* todo: maybe use idle here, but might be less exact */	463	/* todo: maybe use idle here, but might be less exact */
355	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	464	if (expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
356	return;	465	return;
357		466
358	start_thread ();	467	etp_start_thread ();
359	}	468	}
360		469
361	void eio_submit (eio_req *req)
362	{
363	++nreqs;
364
365	X_LOCK (reqlock);
366	++nready;
367	reqq_push (&req_queue, req);
368	X_COND_SIGNAL (reqwait);
369	X_UNLOCK (reqlock);
370
371	maybe_start_thread ();
372	}
373
374	static void end_thread (void)	470	static void etp_end_thread (void)
375	{	471	{
376	eio_req *req = calloc (1, sizeof (eio_req));	472	eio_req *req = calloc (1, sizeof (eio_req));
377		473
378	req->type = EIO_QUIT;	474	req->type = -1;
379	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	475	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
380		476
381	X_LOCK (reqlock);	477	X_LOCK (reqlock);
382	reqq_push (&req_queue, req);	478	reqq_push (&req_queue, req);
383	X_COND_SIGNAL (reqwait);	479	X_COND_SIGNAL (reqwait);
384	X_UNLOCK (reqlock);	480	X_UNLOCK (reqlock);
…		…
386	X_LOCK (wrklock);	482	X_LOCK (wrklock);
387	--started;	483	--started;
388	X_UNLOCK (wrklock);	484	X_UNLOCK (wrklock);
389	}	485	}
390		486
391	void eio_set_max_poll_time (double nseconds)
392	{
393	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
394	max_poll_time = nseconds;
395	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
396	}
397
398	void eio_set_max_poll_reqs (unsigned int maxreqs)
399	{
400	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
401	max_poll_reqs = maxreqs;
402	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
403	}
404
405	void eio_set_max_idle (unsigned int nthreads)
406	{
407	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
408	max_idle = nthreads <= 0 ? 1 : nthreads;
409	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
410	}
411
412	void eio_set_min_parallel (unsigned int nthreads)
413	{
414	if (wanted < nthreads)
415	wanted = nthreads;
416	}
417
418	void eio_set_max_parallel (unsigned int nthreads)
419	{
420	if (wanted > nthreads)
421	wanted = nthreads;
422
423	while (started > wanted)
424	end_thread ();
425	}
426
427	int eio_poll (void)	487	static int etp_poll (void)
428	{	488	{
429	int maxreqs = max_poll_reqs;	489	unsigned int maxreqs;
		490	unsigned int maxtime;
430	struct timeval tv_start, tv_now;	491	struct timeval tv_start, tv_now;
431	eio_req *req;
432		492
		493	X_LOCK (reslock);
		494	maxreqs = max_poll_reqs;
		495	maxtime = max_poll_time;
		496	X_UNLOCK (reslock);
		497
433	if (max_poll_time)	498	if (maxtime)
434	gettimeofday (&tv_start, 0);	499	gettimeofday (&tv_start, 0);
435		500
436	for (;;)	501	for (;;)
437	{	502	{
		503	ETP_REQ *req;
		504
438	maybe_start_thread ();	505	etp_maybe_start_thread ();
439		506
440	X_LOCK (reslock);	507	X_LOCK (reslock);
441	req = reqq_shift (&res_queue);	508	req = reqq_shift (&res_queue);
442		509
443	if (req)	510	if (req)
…		…
451	X_UNLOCK (reslock);	518	X_UNLOCK (reslock);
452		519
453	if (!req)	520	if (!req)
454	return 0;	521	return 0;
455		522
		523	X_LOCK (reqlock);
456	--nreqs;	524	--nreqs;
		525	X_UNLOCK (reqlock);
457		526
458	if (req->type == EIO_GROUP && req->size)	527	if (expect_false (req->type == EIO_GROUP && req->size))
459	{	528	{
460	req->int1 = 1; /* mark request as delayed */	529	req->int1 = 1; /* mark request as delayed */
461	continue;	530	continue;
462	}	531	}
463	else	532	else
464	{	533	{
465	int res = eio_finish (req);	534	int res = ETP_FINISH (req);
466	if (res)	535	if (expect_false (res))
467	return res;	536	return res;
468	}	537	}
469		538
470	if (maxreqs && !--maxreqs)	539	if (expect_false (maxreqs && !--maxreqs))
471	break;	540	break;
472		541
473	if (max_poll_time)	542	if (maxtime)
474	{	543	{
475	gettimeofday (&tv_now, 0);	544	gettimeofday (&tv_now, 0);
476		545
477	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	546	if (tvdiff (&tv_start, &tv_now) >= maxtime)
478	break;	547	break;
479	}	548	}
480	}	549	}
481		550
482	errno = EAGAIN;	551	errno = EAGAIN;
483	return -1;	552	return -1;
484	}	553	}
485		554
		555	static void etp_cancel (ETP_REQ *req)
		556	{
		557	X_LOCK (wrklock);
		558	req->flags |= EIO_FLAG_CANCELLED;
		559	X_UNLOCK (wrklock);
		560
		561	eio_grp_cancel (req);
		562	}
		563
		564	static void etp_submit (ETP_REQ *req)
		565	{
		566	req->pri -= ETP_PRI_MIN;
		567
		568	if (expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
		569	if (expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		570
		571	if (expect_false (req->type == EIO_GROUP))
		572	{
		573	/* I hope this is worth it :/ */
		574	X_LOCK (reqlock);
		575	++nreqs;
		576	X_UNLOCK (reqlock);
		577
		578	X_LOCK (reslock);
		579
		580	++npending;
		581
		582	if (!reqq_push (&res_queue, req) && want_poll_cb)
		583	want_poll_cb ();
		584
		585	X_UNLOCK (reslock);
		586	}
		587	else
		588	{
		589	X_LOCK (reqlock);
		590	++nreqs;
		591	++nready;
		592	reqq_push (&req_queue, req);
		593	X_COND_SIGNAL (reqwait);
		594	X_UNLOCK (reqlock);
		595
		596	etp_maybe_start_thread ();
		597	}
		598	}
		599
		600	static void etp_set_max_poll_time (double nseconds)
		601	{
		602	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		603	max_poll_time = nseconds;
		604	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		605	}
		606
		607	static void etp_set_max_poll_reqs (unsigned int maxreqs)
		608	{
		609	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		610	max_poll_reqs = maxreqs;
		611	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		612	}
		613
		614	static void etp_set_max_idle (unsigned int nthreads)
		615	{
		616	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		617	max_idle = nthreads <= 0 ? 1 : nthreads;
		618	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		619	}
		620
		621	static void etp_set_min_parallel (unsigned int nthreads)
		622	{
		623	if (wanted < nthreads)
		624	wanted = nthreads;
		625	}
		626
		627	static void etp_set_max_parallel (unsigned int nthreads)
		628	{
		629	if (wanted > nthreads)
		630	wanted = nthreads;
		631
		632	while (started > wanted)
		633	etp_end_thread ();
		634	}
		635
		636	/*****************************************************************************/
		637
		638	static void grp_try_feed (eio_req *grp)
		639	{
		640	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
		641	{
		642	grp->flags &= ~EIO_FLAG_GROUPADD;
		643
		644	EIO_FEED (grp);
		645
		646	/* stop if no progress has been made */
		647	if (!(grp->flags & EIO_FLAG_GROUPADD))
		648	{
		649	grp->feed = 0;
		650	break;
		651	}
		652	}
		653	}
		654
		655	static int grp_dec (eio_req *grp)
		656	{
		657	--grp->size;
		658
		659	/* call feeder, if applicable */
		660	grp_try_feed (grp);
		661
		662	/* finish, if done */
		663	if (!grp->size && grp->int1)
		664	return eio_finish (grp);
		665	else
		666	return 0;
		667	}
		668
		669	void eio_destroy (eio_req *req)
		670	{
		671	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
		672	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
		673
		674	EIO_DESTROY (req);
		675	}
		676
		677	static int eio_finish (eio_req *req)
		678	{
		679	int res = EIO_FINISH (req);
		680
		681	if (req->grp)
		682	{
		683	int res2;
		684	eio_req *grp = req->grp;
		685
		686	/* unlink request */
		687	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		688	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		689
		690	if (grp->grp_first == req)
		691	grp->grp_first = req->grp_next;
		692
		693	res2 = grp_dec (grp);
		694
		695	if (!res && res2)
		696	res = res2;
		697	}
		698
		699	eio_destroy (req);
		700
		701	return res;
		702	}
		703
		704	void eio_grp_cancel (eio_req *grp)
		705	{
		706	for (grp = grp->grp_first; grp; grp = grp->grp_next)
		707	eio_cancel (grp);
		708	}
		709
		710	void eio_cancel (eio_req *req)
		711	{
		712	etp_cancel (req);
		713	}
		714
		715	void eio_submit (eio_req *req)
		716	{
		717	etp_submit (req);
		718	}
		719
		720	unsigned int eio_nreqs (void)
		721	{
		722	return etp_nreqs ();
		723	}
		724
		725	unsigned int eio_nready (void)
		726	{
		727	return etp_nready ();
		728	}
		729
		730	unsigned int eio_npending (void)
		731	{
		732	return etp_npending ();
		733	}
		734
		735	unsigned int eio_nthreads (void)
		736	{
		737	return etp_nthreads ();
		738	}
		739
		740	void eio_set_max_poll_time (double nseconds)
		741	{
		742	etp_set_max_poll_time (nseconds);
		743	}
		744
		745	void eio_set_max_poll_reqs (unsigned int maxreqs)
		746	{
		747	etp_set_max_poll_reqs (maxreqs);
		748	}
		749
		750	void eio_set_max_idle (unsigned int nthreads)
		751	{
		752	etp_set_max_idle (nthreads);
		753	}
		754
		755	void eio_set_min_parallel (unsigned int nthreads)
		756	{
		757	etp_set_min_parallel (nthreads);
		758	}
		759
		760	void eio_set_max_parallel (unsigned int nthreads)
		761	{
		762	etp_set_max_parallel (nthreads);
		763	}
		764
		765	int eio_poll (void)
		766	{
		767	return etp_poll ();
		768	}
		769
486	/*****************************************************************************/	770	/*****************************************************************************/
487	/* work around various missing functions */	771	/* work around various missing functions */
488		772
489	#if !HAVE_PREADWRITE	773	#if !HAVE_PREADWRITE
		774	# undef pread
		775	# undef pwrite
490	# define pread aio_pread	776	# define pread eio__pread
491	# define pwrite aio_pwrite	777	# define pwrite eio__pwrite
492		778
493	/*	779	static ssize_t
494	* make our pread/pwrite safe against themselves, but not against	780	eio__pread (int fd, void *buf, size_t count, off_t offset)
495	* normal read/write by using a mutex. slows down execution a lot,
496	* but that's your problem, not mine.
497	*/
498	static mutex_t preadwritelock = X_MUTEX_INIT;
499
500	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
501	{	781	{
502	ssize_t res;	782	ssize_t res;
503	off_t ooffset;	783	off_t ooffset;
504		784
505	X_LOCK (preadwritelock);	785	X_LOCK (preadwritelock);
…		…
510	X_UNLOCK (preadwritelock);	790	X_UNLOCK (preadwritelock);
511		791
512	return res;	792	return res;
513	}	793	}
514		794
515	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	795	static ssize_t
		796	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
516	{	797	{
517	ssize_t res;	798	ssize_t res;
518	off_t ooffset;	799	off_t ooffset;
519		800
520	X_LOCK (preadwritelock);	801	X_LOCK (preadwritelock);
521	ooffset = lseek (fd, 0, SEEK_CUR);	802	ooffset = lseek (fd, 0, SEEK_CUR);
522	lseek (fd, offset, SEEK_SET);	803	lseek (fd, offset, SEEK_SET);
523	res = write (fd, buf, count);	804	res = write (fd, buf, count);
524	lseek (fd, offset, SEEK_SET);	805	lseek (fd, ooffset, SEEK_SET);
525	X_UNLOCK (preadwritelock);	806	X_UNLOCK (preadwritelock);
526		807
527	return res;	808	return res;
528	}	809	}
529	#endif	810	#endif
530		811
531	#ifndef HAVE_FUTIMES	812	#ifndef HAVE_FUTIMES
532		813
		814	# undef utimes
		815	# undef futimes
533	# define utimes(path,times) aio_utimes (path, times)	816	# define utimes(path,times) eio__utimes (path, times)
534	# define futimes(fd,times) aio_futimes (fd, times)	817	# define futimes(fd,times) eio__futimes (fd, times)
535		818
		819	static int
536	static int aio_utimes (const char *filename, const struct timeval times[2])	820	eio__utimes (const char *filename, const struct timeval times[2])
537	{	821	{
538	if (times)	822	if (times)
539	{	823	{
540	struct utimbuf buf;	824	struct utimbuf buf;
541		825
…		…
546	}	830	}
547	else	831	else
548	return utime (filename, 0);	832	return utime (filename, 0);
549	}	833	}
550		834
551	static int aio_futimes (int fd, const struct timeval tv[2])	835	static int eio__futimes (int fd, const struct timeval tv[2])
552	{	836	{
553	errno = ENOSYS;	837	errno = ENOSYS;
554	return -1;	838	return -1;
555	}	839	}
556		840
557	#endif	841	#endif
558		842
559	#if !HAVE_FDATASYNC	843	#if !HAVE_FDATASYNC
		844	# undef fdatasync
560	# define fdatasync fsync	845	# define fdatasync(fd) fsync (fd)
561	#endif	846	#endif
		847
		848	/* sync_file_range always needs emulation */
		849	int
		850	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
		851	{
		852	#if HAVE_SYNC_FILE_RANGE
		853	int res;
		854
		855	if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
		856	|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
		857	|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
		858	{
		859	flags = 0
		860	| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
		861	| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
		862	| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
		863	}
		864
		865	res = sync_file_range (fd, offset, nbytes, flags);
		866
		867	if (!res || errno != ENOSYS)
		868	return res;
		869	#endif
		870
		871	/* even though we could play tricks with the flags, it's better to always
		872	* call fdatasync, as thta matches the expectation of it's users best */
		873	return fdatasync (fd);
		874	}
562		875
563	#if !HAVE_READAHEAD	876	#if !HAVE_READAHEAD
		877	# undef readahead
564	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	878	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
565		879
		880	static ssize_t
566	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	881	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
567	{	882	{
568	size_t todo = count;	883	size_t todo = count;
569	dBUF;	884	dBUF;
570		885
571	while (todo > 0)	886	while (todo > 0)
…		…
581	return count;	896	return count;
582	}	897	}
583		898
584	#endif	899	#endif
585		900
586	#if !HAVE_READDIR_R
587	# define readdir_r aio_readdir_r
588
589	static mutex_t readdirlock = X_MUTEX_INIT;
590
591	static int readdir_r (DIR *dirp, EIO_STRUCT_DIRENT *ent, EIO_STRUCT_DIRENT **res)
592	{
593	EIO_STRUCT_DIRENT *e;
594	int errorno;
595
596	X_LOCK (readdirlock);
597
598	e = readdir (dirp);
599	errorno = errno;
600
601	if (e)
602	{
603	*res = ent;
604	strcpy (ent->d_name, e->d_name);
605	}
606	else
607	*res = 0;
608
609	X_UNLOCK (readdirlock);
610
611	errno = errorno;
612	return e ? 0 : -1;
613	}
614	#endif
615
616	/* sendfile always needs emulation */	901	/* sendfile always needs emulation */
		902	static ssize_t
617	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	903	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
618	{	904	{
619	ssize_t res;	905	ssize_t res;
620		906
621	if (!count)	907	if (!count)
622	return 0;	908	return 0;
…		…
704	}	990	}
705		991
706	return res;	992	return res;
707	}	993	}
708		994
		995	static signed char
		996	eio_dent_cmp (const eio_dirent *a, const eio_dirent *b)
		997	{
		998	return b->score - a->score ? b->score - a->score /* works because our signed char is always 0..100 */
		999	: a->inode < b->inode ? -1 : a->inode > b->inode ? 1 : 0;
		1000	}
		1001
		1002	#define EIO_QSORT_CUTOFF 20 /* quite high, but performs well on many filesystems */
		1003
		1004	static void
		1005	eio_dent_sort (eio_dirent *dents, int size)
		1006	{
		1007	/* should be good for 2**31 entries */
		1008	struct rng { int l, r; } rng [32];
		1009	int i, j;
		1010
		1011	i = 0;
		1012	rng[0].l = 0;
		1013	rng[0].r = size;
		1014
		1015	while (expect_true (i >= 0))
		1016	{
		1017	int L = rng [i].l;
		1018	int R = rng [i].r - 1;
		1019
		1020	if (expect_false (L + EIO_QSORT_CUTOFF < R))
		1021	{
		1022	eio_dirent piv = dents [L];
		1023
		1024	while (L < R)
		1025	{
		1026	while (eio_dent_cmp (&dents [R], &piv) >= 0 && L < R)
		1027	--R;
		1028
		1029	if (L < R)
		1030	dents [L++] = dents [R];
		1031
		1032	while (eio_dent_cmp (&dents [L], &piv) <= 0 && L < R)
		1033	++L;
		1034
		1035	if (L < R)
		1036	dents [R--] = dents [L];
		1037	}
		1038
		1039	dents [L] = piv;
		1040
		1041	++i;
		1042	rng [i].l = L + 1;
		1043	rng [i].r = rng [i - 1].r;
		1044	rng [i - 1].r = L;
		1045
		1046	if (rng [i].r - rng [i].l > rng [i - 1].r - rng [i - 1].l)
		1047	{
		1048	struct rng t;
		1049
		1050	t = rng [i]; rng [i] = rng [i - 1]; rng [i - 1] = t;
		1051	}
		1052	}
		1053	else
		1054	--i;
		1055	}
		1056
		1057	/* use a simple insertion sort at the end */
		1058	for (i = 1; i < size; ++i)
		1059	{
		1060	eio_dirent value = dents [i];
		1061
		1062	for (j = i - 1; j >= 0 && eio_dent_cmp (&dents [j], &value) > 0; --j)
		1063	dents [j + 1] = dents [j];
		1064
		1065	dents [j + 1] = value;
		1066	}
		1067	}
		1068
709	/* read a full directory */	1069	/* read a full directory */
		1070	static void
710	static void scandir_ (eio_req *req, worker *self)	1071	eio__scandir (eio_req *req, etp_worker *self)
711	{	1072	{
712	DIR *dirp;	1073	DIR *dirp;
713	union
714	{
715	EIO_STRUCT_DIRENT d;
716	char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1];
717	} *u;
718	EIO_STRUCT_DIRENT *entp;	1074	EIO_STRUCT_DIRENT *entp;
719	char *name, *names;	1075	char *name, *names;
720	int memlen = 4096;	1076	int namesalloc = 4096;
721	int memofs = 0;	1077	int namesoffs = 0;
		1078	int flags = req->int1;
		1079	eio_dirent *dents = 0;
		1080	int dentalloc = 128;
722	int res = 0;	1081	int dentoffs = 0;
		1082
		1083	req->result = -1;
		1084
		1085	if (!(flags & EIO_READDIR_DENTS))
		1086	flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER);
723		1087
724	X_LOCK (wrklock);	1088	X_LOCK (wrklock);
		1089	/* the corresponding closedir is in ETP_WORKER_CLEAR */
725	self->dirp = dirp = opendir (req->ptr1);	1090	self->dirp = dirp = opendir (req->ptr1);
726	self->dbuf = u = malloc (sizeof (*u));
727	req->flags |= EIO_FLAG_PTR2_FREE;	1091	req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE;
728	req->ptr2 = names = malloc (memlen);	1092	req->ptr1 = names = malloc (namesalloc);
		1093	req->ptr2 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0;
729	X_UNLOCK (wrklock);	1094	X_UNLOCK (wrklock);
730		1095
731	if (dirp && u && names)	1096	if (dirp && names && (!flags || dents))
732	for (;;)	1097	for (;;)
733	{	1098	{
734	errno = 0;	1099	errno = 0;
735	readdir_r (dirp, &u->d, &entp);	1100	entp = readdir (dirp);
736		1101
737	if (!entp)	1102	if (!entp)
		1103	{
		1104	if (errno)
		1105	break;
		1106
		1107	/* sort etc. */
		1108	req->int1 = flags;
		1109	req->result = dentoffs;
		1110
		1111	if (dents)
		1112	{
		1113	eio_dirent *ent = dents + dentoffs;
		1114
		1115	while (ent > dents)
		1116	(--ent)->name = names + (size_t)ent->name;
		1117	}
		1118
		1119	if (flags & EIO_READDIR_STAT_ORDER
		1120	|| !(~flags & (EIO_READDIR_DIRS_FIRST | EIO_READDIR_FOUND_UNKNOWN)))
		1121	eio_dent_sort (dents, dentoffs); /* score depends of DIRS_FIRST */
		1122	else if (flags & EIO_READDIR_DIRS_FIRST)
		1123	{
		1124	/* in this case, all is known, and we just put dirs first and sort them */
		1125	eio_dirent *ent = dents + dentoffs;
		1126	eio_dirent *dir = dents;
		1127
		1128	/* now move dirs to the front, and non-dirs to the back */
		1129	/* by walking from both sides and swapping if necessary */
		1130	while (ent > dir)
		1131	{
		1132	if (dir->type == DT_DIR)
		1133	++dir;
		1134	else
		1135	{
		1136	--ent;
		1137
		1138	if (ent->type == DT_DIR)
		1139	{
		1140	eio_dirent tmp = *dir;
		1141	*dir = *ent;
		1142	*ent = tmp;
		1143
		1144	++dir;
		1145	}
		1146	}
		1147	}
		1148
		1149	/* now sort the dirs only */
		1150	eio_dent_sort (dents, dir - dents);
		1151	}
		1152
		1153	/* only provide the names array unless DENTS is specified */
		1154	if (!(flags & EIO_READDIR_DENTS))
		1155	{
		1156	X_LOCK (wrklock);
		1157	assert (!dents);
		1158	req->ptr1 = 0;
		1159	req->ptr2 = names;
		1160	X_UNLOCK (wrklock);
		1161	}
		1162
738	break;	1163	break;
		1164	}
739		1165
		1166	/* now add the entry to our list(s) */
740	name = entp->d_name;	1167	name = entp->d_name;
741		1168
		1169	/* skip . and .. entries */
742	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	1170	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
743	{	1171	{
744	int len = strlen (name) + 1;	1172	int len = D_NAMLEN (entp) + 1;
745		1173
746	res++;	1174	while (expect_false (namesoffs + len > namesalloc))
747
748	while (memofs + len > memlen)
749	{	1175	{
750	memlen *= 2;	1176	namesalloc *= 2;
751	X_LOCK (wrklock);	1177	X_LOCK (wrklock);
752	req->ptr2 = names = realloc (names, memlen);	1178	req->ptr1 = names = realloc (names, namesalloc);
753	X_UNLOCK (wrklock);	1179	X_UNLOCK (wrklock);
754		1180
755	if (!names)	1181	if (!names)
756	break;	1182	break;
757	}	1183	}
758		1184
759	memcpy (names + memofs, name, len);	1185	memcpy (names + namesoffs, name, len);
		1186
		1187	if (dents)
		1188	{
		1189	struct eio_dirent *ent;
		1190
		1191	if (expect_false (dentoffs == dentalloc))
		1192	{
		1193	dentalloc *= 2;
		1194	X_LOCK (wrklock);
		1195	req->ptr2 = dents = realloc (dents, dentalloc * sizeof (eio_dirent));
		1196	X_UNLOCK (wrklock);
		1197
		1198	if (!dents)
		1199	break;
		1200	}
		1201
		1202	ent = dents + dentoffs;
		1203
		1204	ent->name = (char *)(size_t)namesoffs; /* rather dirtily we store the offset in the pointer */
		1205	ent->namelen = len - 1;
		1206	ent->inode = D_INO (entp);
		1207
		1208	switch (D_TYPE (entp))
		1209	{
		1210	default:
		1211	ent->type = EIO_DT_UNKNOWN;
		1212	flags |= EIO_READDIR_FOUND_UNKNOWN;
		1213	break;
		1214
		1215	#ifdef DT_FIFO
		1216	case DT_FIFO: ent->type = EIO_DT_FIFO; break;
		1217	#endif
		1218	#ifdef DT_CHR
		1219	case DT_CHR: ent->type = EIO_DT_CHR; break;
		1220	#endif
		1221	#ifdef DT_MPC
		1222	case DT_MPC: ent->type = EIO_DT_MPC; break;
		1223	#endif
		1224	#ifdef DT_DIR
		1225	case DT_DIR: ent->type = EIO_DT_DIR; break;
		1226	#endif
		1227	#ifdef DT_NAM
		1228	case DT_NAM: ent->type = EIO_DT_NAM; break;
		1229	#endif
		1230	#ifdef DT_BLK
		1231	case DT_BLK: ent->type = EIO_DT_BLK; break;
		1232	#endif
		1233	#ifdef DT_MPB
		1234	case DT_MPB: ent->type = EIO_DT_MPB; break;
		1235	#endif
		1236	#ifdef DT_REG
		1237	case DT_REG: ent->type = EIO_DT_REG; break;
		1238	#endif
		1239	#ifdef DT_NWK
		1240	case DT_NWK: ent->type = EIO_DT_NWK; break;
		1241	#endif
		1242	#ifdef DT_CMP
		1243	case DT_CMP: ent->type = EIO_DT_CMP; break;
		1244	#endif
		1245	#ifdef DT_LNK
		1246	case DT_LNK: ent->type = EIO_DT_LNK; break;
		1247	#endif
		1248	#ifdef DT_SOCK
		1249	case DT_SOCK: ent->type = EIO_DT_SOCK; break;
		1250	#endif
		1251	#ifdef DT_DOOR
		1252	case DT_DOOR: ent->type = EIO_DT_DOOR; break;
		1253	#endif
		1254	#ifdef DT_WHT
		1255	case DT_WHT: ent->type = EIO_DT_WHT; break;
		1256	#endif
		1257	}
		1258
		1259	ent->score = 0;
		1260
		1261	if (flags & EIO_READDIR_DIRS_FIRST)
		1262	{
		1263	if (ent->type == EIO_DT_UNKNOWN)
		1264	{
		1265	if (*name == '.') /* leading dots are likely directories, and, in any case, rare */
		1266	ent->score = 98;
		1267	else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */
		1268	ent->score = len <= 2 ? len + 6 : len <= 4 ? 5 : len <= 7 ? 4 : 1; /* shorter == more likely dir, but avoid too many classes */
		1269	}
		1270	else if (ent->type == EIO_DT_DIR)
		1271	ent->score = 100;
		1272	}
		1273	}
		1274
760	memofs += len;	1275	namesoffs += len;
		1276	++dentoffs;
		1277	}
		1278
		1279	if (EIO_CANCELLED (req))
		1280	{
		1281	errno = ECANCELED;
		1282	break;
761	}	1283	}
762	}	1284	}
		1285	}
763		1286
764	if (errno)	1287	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
765	res = -1;	1288	# undef msync
766		1289	# define msync(a,b,c) ((errno = ENOSYS), -1)
767	req->result = res;	1290	#endif
		1291
		1292	int
		1293	eio__mtouch (void *mem, size_t len, int flags)
		1294	{
		1295	intptr_t addr = (intptr_t)mem;
		1296	intptr_t end = addr + len;
		1297	#ifdef PAGESIZE
		1298	const intptr_t page = PAGESIZE;
		1299	#else
		1300	static intptr_t page;
		1301
		1302	if (!page)
		1303	page = sysconf (_SC_PAGESIZE);
		1304	#endif
		1305
		1306	addr &= ~(page - 1); /* assume page size is always a power of two */
		1307
		1308	if (addr < end)
		1309	if (flags) /* modify */
		1310	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len);
		1311	else
		1312	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len);
		1313
		1314	return 0;
768	}	1315	}
769		1316
770	/*****************************************************************************/	1317	/*****************************************************************************/
771		1318
772	#define ALLOC(len) \	1319	#define ALLOC(len) \
773	X_LOCK (wrklock); \
774	req->flags |= EIO_FLAG_PTR2_FREE; \
775	X_UNLOCK (wrklock); \
776	req->ptr2 = malloc (len); \
777	if (!req->ptr2) \	1320	if (!req->ptr2) \
778	{ \	1321	{ \
		1322	X_LOCK (wrklock); \
		1323	req->flags |= EIO_FLAG_PTR2_FREE; \
		1324	X_UNLOCK (wrklock); \
		1325	req->ptr2 = malloc (len); \
		1326	if (!req->ptr2) \
		1327	{ \
779	errno = ENOMEM; \	1328	errno = ENOMEM; \
780	req->result = -1; \	1329	req->result = -1; \
781	break; \	1330	break; \
		1331	} \
782	}	1332	}
783		1333
784	X_THREAD_PROC (eio_proc)	1334	X_THREAD_PROC (etp_proc)
785	{	1335	{
786	eio_req *req;	1336	ETP_REQ *req;
787	struct timespec ts;	1337	struct timespec ts;
788	worker *self = (worker *)thr_arg;	1338	etp_worker *self = (etp_worker *)thr_arg;
789		1339
790	/* try to distribute timeouts somewhat randomly */	1340	/* try to distribute timeouts somewhat randomly */
791	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1341	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
792		1342
793	for (;;)	1343	for (;;)
794	{	1344	{
795	ts.tv_sec = time (0) + IDLE_TIMEOUT;
796
797	X_LOCK (reqlock);	1345	X_LOCK (reqlock);
798		1346
799	for (;;)	1347	for (;;)
800	{	1348	{
801	self->req = req = reqq_shift (&req_queue);	1349	self->req = req = reqq_shift (&req_queue);
…		…
803	if (req)	1351	if (req)
804	break;	1352	break;
805		1353
806	++idle;	1354	++idle;
807		1355
		1356	ts.tv_sec = time (0) + IDLE_TIMEOUT;
808	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1357	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
809	{	1358	{
810	if (idle > max_idle)	1359	if (idle > max_idle)
811	{	1360	{
812	--idle;	1361	--idle;
…		…
817	goto quit;	1366	goto quit;
818	}	1367	}
819		1368
820	/* we are allowed to idle, so do so without any timeout */	1369	/* we are allowed to idle, so do so without any timeout */
821	X_COND_WAIT (reqwait, reqlock);	1370	X_COND_WAIT (reqwait, reqlock);
822	ts.tv_sec = time (0) + IDLE_TIMEOUT;
823	}	1371	}
824		1372
825	--idle;	1373	--idle;
826	}	1374	}
827		1375
828	--nready;	1376	--nready;
829		1377
830	X_UNLOCK (reqlock);	1378	X_UNLOCK (reqlock);
831		1379
832	errno = 0; /* strictly unnecessary */	1380	if (req->type < 0)
		1381	goto quit;
833		1382
834	if (!EIO_CANCELLED (req))	1383	if (!EIO_CANCELLED (req))
835	switch (req->type)	1384	ETP_EXECUTE (self, req);
836	{
837	case EIO_READ: req->result = req->offs >= 0
838	? pread (req->int1, req->ptr2, req->size, req->offs)
839	: read (req->int1, req->ptr2, req->size); break;
840	case EIO_WRITE: req->result = req->offs >= 0
841	? pwrite (req->int1, req->ptr2, req->size, req->offs)
842	: write (req->int1, req->ptr2, req->size); break;
843
844	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
845	case EIO_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
846
847	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
848	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
849	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
850	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
851	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
852	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
853
854	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
855	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
856	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
857	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
858	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
859	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
860
861	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
862	case EIO_CLOSE: req->result = close (req->int1); break;
863	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
864	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
865	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
866	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
867	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
868	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
869	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
870	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
871	case EIO_READLINK: ALLOC (NAME_MAX);
872	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
873
874	case EIO_SYNC: req->result = 0; sync (); break;
875	case EIO_FSYNC: req->result = fsync (req->int1); break;
876	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
877
878	case EIO_READDIR: scandir_ (req, self); break;
879
880	case EIO_BUSY:
881	#ifdef _WIN32
882	Sleep (req->nv1 * 1000.);
883	#else
884	{
885	struct timeval tv;
886
887	tv.tv_sec = req->nv1;
888	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
889
890	req->result = select (0, 0, 0, 0, &tv);
891	}
892	#endif
893	break;
894
895	case EIO_UTIME:
896	case EIO_FUTIME:
897	{
898	struct timeval tv[2];
899	struct timeval *times;
900
901	if (req->nv1 != -1. || req->nv2 != -1.)
902	{
903	tv[0].tv_sec = req->nv1;
904	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
905	tv[1].tv_sec = req->nv2;
906	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
907
908	times = tv;
909	}
910	else
911	times = 0;
912
913
914	req->result = req->type == EIO_FUTIME
915	? futimes (req->int1, times)
916	: utimes (req->ptr1, times);
917	}
918
919	case EIO_GROUP:
920	case EIO_NOP:
921	break;
922
923	case EIO_QUIT:
924	goto quit;
925
926	default:
927	req->result = -1;
928	break;
929	}
930
931	req->errorno = errno;
932		1385
933	X_LOCK (reslock);	1386	X_LOCK (reslock);
934		1387
935	++npending;	1388	++npending;
936		1389
937	if (!reqq_push (&res_queue, req) && want_poll_cb)	1390	if (!reqq_push (&res_queue, req) && want_poll_cb)
938	want_poll_cb ();	1391	want_poll_cb ();
939		1392
940	self->req = 0;	1393	self->req = 0;
941	worker_clear (self);	1394	etp_worker_clear (self);
942		1395
943	X_UNLOCK (reslock);	1396	X_UNLOCK (reslock);
944	}	1397	}
945		1398
946	quit:	1399	quit:
947	X_LOCK (wrklock);	1400	X_LOCK (wrklock);
948	worker_free (self);	1401	etp_worker_free (self);
949	X_UNLOCK (wrklock);	1402	X_UNLOCK (wrklock);
950		1403
951	return 0;	1404	return 0;
952	}	1405	}
953		1406
954	/*****************************************************************************/	1407	/*****************************************************************************/
955		1408
956	static void eio_atfork_prepare (void)
957	{
958	X_LOCK (wrklock);
959	X_LOCK (reqlock);
960	X_LOCK (reslock);
961	#if !HAVE_PREADWRITE
962	X_LOCK (preadwritelock);
963	#endif
964	#if !HAVE_READDIR_R
965	X_LOCK (readdirlock);
966	#endif
967	}
968
969	static void eio_atfork_parent (void)
970	{
971	#if !HAVE_READDIR_R
972	X_UNLOCK (readdirlock);
973	#endif
974	#if !HAVE_PREADWRITE
975	X_UNLOCK (preadwritelock);
976	#endif
977	X_UNLOCK (reslock);
978	X_UNLOCK (reqlock);
979	X_UNLOCK (wrklock);
980	}
981
982	static void eio_atfork_child (void)
983	{
984	eio_req *prv;
985
986	while (prv = reqq_shift (&req_queue))
987	eio_destroy (prv);
988
989	while (prv = reqq_shift (&res_queue))
990	eio_destroy (prv);
991
992	while (wrk_first.next != &wrk_first)
993	{
994	worker *wrk = wrk_first.next;
995
996	if (wrk->req)
997	eio_destroy (wrk->req);
998
999	worker_clear (wrk);
1000	worker_free (wrk);
1001	}
1002
1003	started = 0;
1004	idle = 0;
1005	nreqs = 0;
1006	nready = 0;
1007	npending = 0;
1008
1009	eio_atfork_parent ();
1010	}
1011
1012	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1409	int eio_init (void (*want_poll)(void), void (*done_poll)(void))
1013	{	1410	{
1014	want_poll_cb = want_poll;	1411	return etp_init (want_poll, done_poll);
1015	done_poll_cb = done_poll;
1016
1017	#ifdef _WIN32
1018	X_MUTEX_CHECK (wrklock);
1019	X_MUTEX_CHECK (reslock);
1020	X_MUTEX_CHECK (reqlock);
1021	X_MUTEX_CHECK (reqwait);
1022	X_MUTEX_CHECK (preadwritelock);
1023	X_MUTEX_CHECK (readdirlock);
1024
1025	X_COND_CHECK (reqwait);
1026	#endif
1027
1028	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);
1029	}	1412	}
1030		1413
1031	static void eio_api_destroy (eio_req *req)	1414	static void eio_api_destroy (eio_req *req)
1032	{	1415	{
1033	free (req);	1416	free (req);
…		…
1038	\	1421	\
1039	req = (eio_req *)calloc (1, sizeof *req); \	1422	req = (eio_req *)calloc (1, sizeof *req); \
1040	if (!req) \	1423	if (!req) \
1041	return 0; \	1424	return 0; \
1042	\	1425	\
1043	req->type = EIO_ ## rtype; \	1426	req->type = rtype; \
1044	req->pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \	1427	req->pri = pri; \
1045	req->finish = cb; \	1428	req->finish = cb; \
		1429	req->data = data; \
1046	req->destroy = eio_api_destroy;	1430	req->destroy = eio_api_destroy;
1047		1431
1048	#define SEND eio_submit (req); return req	1432	#define SEND eio_submit (req); return req
1049		1433
1050	#define PATH (void)0	1434	#define PATH \
		1435	req->flags |= EIO_FLAG_PTR1_FREE; \
		1436	req->ptr1 = strdup (path); \
		1437	if (!req->ptr1) \
		1438	{ \
		1439	eio_api_destroy (req); \
		1440	return 0; \
		1441	}
1051		1442
		1443	static void eio_execute (etp_worker *self, eio_req *req)
		1444	{
		1445	errno = 0;
		1446
		1447	switch (req->type)
		1448	{
		1449	case EIO_READ: ALLOC (req->size);
		1450	req->result = req->offs >= 0
		1451	? pread (req->int1, req->ptr2, req->size, req->offs)
		1452	: read (req->int1, req->ptr2, req->size); break;
		1453	case EIO_WRITE: req->result = req->offs >= 0
		1454	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		1455	: write (req->int1, req->ptr2, req->size); break;
		1456
		1457	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1458	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
		1459
		1460	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1461	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1462	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1463	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1464	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1465	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1466
		1467	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1468	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1469	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
		1470	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
		1471	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1472	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		1473
		1474	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
		1475	case EIO_CLOSE: req->result = close (req->int1); break;
		1476	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		1477	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		1478	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		1479	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		1480	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		1481	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		1482	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		1483	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->int3); break;
		1484
		1485	case EIO_READLINK: ALLOC (NAME_MAX);
		1486	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
		1487
		1488	case EIO_SYNC: req->result = 0; sync (); break;
		1489	case EIO_FSYNC: req->result = fsync (req->int1); break;
		1490	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		1491	case EIO_MSYNC: req->result = msync (req->ptr2, req->size, req->int1); break;
		1492	case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break;
		1493	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		1494
		1495	case EIO_READDIR: eio__scandir (req, self); break;
		1496
		1497	case EIO_BUSY:
		1498	#ifdef _WIN32
		1499	Sleep (req->nv1 * 1000.);
		1500	#else
		1501	{
		1502	struct timeval tv;
		1503
		1504	tv.tv_sec = req->nv1;
		1505	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
		1506
		1507	req->result = select (0, 0, 0, 0, &tv);
		1508	}
		1509	#endif
		1510	break;
		1511
		1512	case EIO_UTIME:
		1513	case EIO_FUTIME:
		1514	{
		1515	struct timeval tv[2];
		1516	struct timeval *times;
		1517
		1518	if (req->nv1 != -1. || req->nv2 != -1.)
		1519	{
		1520	tv[0].tv_sec = req->nv1;
		1521	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1522	tv[1].tv_sec = req->nv2;
		1523	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1524
		1525	times = tv;
		1526	}
		1527	else
		1528	times = 0;
		1529
		1530
		1531	req->result = req->type == EIO_FUTIME
		1532	? futimes (req->int1, times)
		1533	: utimes (req->ptr1, times);
		1534	}
		1535	break;
		1536
		1537	case EIO_GROUP:
		1538	abort (); /* handled in eio_request */
		1539
		1540	case EIO_NOP:
		1541	req->result = 0;
		1542	break;
		1543
		1544	case EIO_CUSTOM:
		1545	((void (*)(eio_req *))req->feed) (req);
		1546	break;
		1547
		1548	default:
		1549	req->result = -1;
		1550	break;
		1551	}
		1552
		1553	req->errorno = errno;
		1554	}
		1555
		1556	#ifndef EIO_NO_WRAPPERS
		1557
		1558	eio_req *eio_nop (int pri, eio_cb cb, void *data)
		1559	{
		1560	REQ (EIO_NOP); SEND;
		1561	}
		1562
		1563	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
		1564	{
		1565	REQ (EIO_BUSY); req->nv1 = delay; SEND;
		1566	}
		1567
1052	eio_req *eio_fsync (int fd, eio_cb cb)	1568	eio_req *eio_sync (int pri, eio_cb cb, void *data)
1053	{	1569	{
		1570	REQ (EIO_SYNC); SEND;
		1571	}
		1572
		1573	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		1574	{
1054	REQ (FSYNC); req->int1 = fd; SEND;	1575	REQ (EIO_FSYNC); req->int1 = fd; SEND;
1055	}	1576	}
1056		1577
		1578	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1579	{
		1580	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1581	}
		1582
		1583	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1584	{
		1585	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1586	}
		1587
		1588	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		1589	{
		1590	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		1591	}
		1592
1057	eio_req *eio_fdatasync (int fd, eio_cb cb)	1593	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1058	{	1594	{
1059	REQ (FDATASYNC); req->int1 = fd; SEND;	1595	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1060	}	1596	}
1061		1597
		1598	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		1599	{
		1600	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		1601	}
		1602
1062	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb)	1603	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
1063	{	1604	{
1064	REQ (READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;	1605	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
1065	}	1606	}
1066		1607
1067	eio_req *eio_read (int fd, off_t offset, size_t length, void *data, eio_cb cb)	1608	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1068	{	1609	{
1069	REQ (READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	1610	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1070	}	1611	}
1071		1612
1072	eio_req *eio_write (int fd, off_t offset, size_t length, void *data, eio_cb cb)	1613	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1073	{	1614	{
1074	REQ (WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	1615	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1075	}	1616	}
1076		1617
1077	eio_req *eio_fstat (int fd, eio_cb cb)	1618	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
1078	{	1619	{
1079	REQ (FSTAT); req->int1 = fd; SEND;	1620	REQ (EIO_FSTAT); req->int1 = fd; SEND;
1080	}	1621	}
1081		1622
1082	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb)	1623	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
1083	{	1624	{
1084	REQ (FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;	1625	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
1085	}	1626	}
1086		1627
1087	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb)	1628	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
1088	{	1629	{
1089	REQ (FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;	1630	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
1090	}	1631	}
1091		1632
1092	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb)	1633	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
1093	{	1634	{
1094	REQ (FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;	1635	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1095	}	1636	}
1096		1637
1097	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb)	1638	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
1098	{	1639	{
1099	REQ (FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	1640	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1100	}	1641	}
1101		1642
1102	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb)	1643	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
1103	{	1644	{
1104	REQ (DUP2); req->int1 = fd; req->int2 = fd2; SEND;	1645	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
1105	}	1646	}
1106		1647
1107	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb)	1648	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
1108	{	1649	{
1109	REQ (SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;	1650	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
1110	}	1651	}
1111		1652
1112	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb)	1653	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
1113	{	1654	{
1114	REQ (OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;	1655	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
1115	}	1656	}
1116		1657
1117	eio_req *eio_readlink (const char *path, eio_cb cb)
1118	{
1119	REQ (READLINK); PATH; SEND;
1120	}
1121
1122	eio_req *eio_stat (const char *path, eio_cb cb)
1123	{
1124	REQ (STAT); PATH; SEND;
1125	}
1126
1127	eio_req *eio_lstat (const char *path, eio_cb cb)
1128	{
1129	REQ (LSTAT); PATH; SEND;
1130	}
1131
1132	eio_req *eio_utime (const char *path, double atime, double mtime, eio_cb cb)	1658	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
1133	{	1659	{
1134	REQ (UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;	1660	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
1135	}	1661	}
1136		1662
1137	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb)	1663	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
1138	{	1664	{
1139	REQ (TRUNCATE); PATH; req->offs = offset; SEND;	1665	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1140	}	1666	}
1141		1667
1142	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb)	1668	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
1143	{	1669	{
1144	REQ (CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	1670	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1145	}	1671	}
1146		1672
1147	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb)	1673	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1148	{	1674	{
1149	REQ (CHMOD); PATH; req->int2 = (long)mode; SEND;	1675	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
1150	}	1676	}
1151		1677
1152	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb)	1678	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1153	{	1679	{
1154	REQ (MKDIR); PATH; req->int2 = (long)mode; SEND;	1680	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
1155	}	1681	}
1156		1682
1157	eio_req *eio_unlink (const char *path, eio_cb cb)	1683	static eio_req *
		1684	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
1158	{	1685	{
1159	REQ (UNLINK); PATH; SEND;
1160	}
1161
1162	eio_req *eio_rmdir (const char *path, eio_cb cb)
1163	{
1164	REQ (RMDIR); PATH; SEND;	1686	REQ (type); PATH; SEND;
1165	}	1687	}
1166		1688
		1689	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		1690	{
		1691	return eio__1path (EIO_READLINK, path, pri, cb, data);
		1692	}
		1693
		1694	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		1695	{
		1696	return eio__1path (EIO_STAT, path, pri, cb, data);
		1697	}
		1698
		1699	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		1700	{
		1701	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		1702	}
		1703
		1704	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		1705	{
		1706	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		1707	}
		1708
1167	eio_req *eio_readdir (const char *path, eio_cb cb)	1709	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
1168	{	1710	{
1169	REQ (READDIR); PATH; SEND;	1711	return eio__1path (EIO_RMDIR, path, pri, cb, data);
1170	}	1712	}
1171		1713
		1714	eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data)
		1715	{
		1716	REQ (EIO_READDIR); PATH; req->int1 = flags; SEND;
		1717	}
		1718
1172	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb)	1719	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1173	{	1720	{
1174	REQ (MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND;	1721	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND;
1175	}	1722	}
1176		1723
1177	eio_req *eio_busy (double delay, eio_cb cb)	1724	static eio_req *
		1725	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1178	{	1726	{
1179	REQ (BUSY); req->nv1 = delay; SEND;	1727	REQ (type); PATH;
1180	}
1181		1728
		1729	req->flags |= EIO_FLAG_PTR2_FREE;
		1730	req->ptr2 = strdup (new_path);
		1731	if (!req->ptr2)
		1732	{
		1733	eio_api_destroy (req);
		1734	return 0;
		1735	}
		1736
		1737	SEND;
		1738	}
		1739
		1740	eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1741	{
		1742	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
		1743	}
		1744
		1745	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1746	{
		1747	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
		1748	}
		1749
		1750	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1751	{
		1752	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
		1753	}
		1754
		1755	eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data)
		1756	{
		1757	REQ (EIO_CUSTOM); req->feed = (void (*)(eio_req *))execute; SEND;
		1758	}
		1759
		1760	#endif
		1761
1182	eio_req *eio_nop (eio_cb cb)	1762	eio_req *eio_grp (eio_cb cb, void *data)
1183	{	1763	{
		1764	const int pri = EIO_PRI_MAX;
		1765
1184	REQ (NOP); SEND;	1766	REQ (EIO_GROUP); SEND;
1185	}	1767	}
1186		1768
1187	#undef REQ	1769	#undef REQ
1188	#undef PATH	1770	#undef PATH
1189	#undef SEND	1771	#undef SEND
1190		1772
1191	#if 0	1773	/*****************************************************************************/
1192		1774	/* grp functions */
1193	void
1194	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1195	PROTOTYPE: $$$;$
1196	PPCODE:
1197	{
1198	dREQ;
1199
1200	req->type = EIO_OPEN;
1201	req->sv1 = newSVsv (pathname);
1202	req->ptr1 = SvPVbyte_nolen (req->sv1);
1203	req->int1 = flags;
1204	req->int2 = mode;
1205
1206	EIO_SEND;
1207	}
1208
1209	void
1210	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1211	PROTOTYPE: $;$
1212	ALIAS:
1213	aio_fsync = EIO_FSYNC
1214	aio_fdatasync = EIO_FDATASYNC
1215	PPCODE:
1216	{
1217	dREQ;
1218
1219	req->type = ix;
1220	req->sv1 = newSVsv (fh);
1221	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1222
1223	EIO_SEND (req);
1224	}
1225
1226	void
1227	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1228	PROTOTYPE: $;$
1229	PPCODE:
1230	{
1231	dREQ;
1232
1233	req->type = EIO_CLOSE;
1234	req->sv1 = newSVsv (fh);
1235	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1236
1237	EIO_SEND (req);
1238	}
1239
1240	void
1241	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1242	ALIAS:
1243	aio_read = EIO_READ
1244	aio_write = EIO_WRITE
1245	PROTOTYPE: $$$$$;$
1246	PPCODE:
1247	{
1248	STRLEN svlen;
1249	char *svptr = SvPVbyte (data, svlen);
1250	UV len = SvUV (length);
1251
1252	SvUPGRADE (data, SVt_PV);
1253	SvPOK_on (data);
1254
1255	if (dataoffset < 0)
1256	dataoffset += svlen;
1257
1258	if (dataoffset < 0 || dataoffset > svlen)
1259	croak ("dataoffset outside of data scalar");
1260
1261	if (ix == EIO_WRITE)
1262	{
1263	/* write: check length and adjust. */
1264	if (!SvOK (length) || len + dataoffset > svlen)
1265	len = svlen - dataoffset;
1266	}
1267	else
1268	{
1269	/* read: grow scalar as necessary */
1270	svptr = SvGROW (data, len + dataoffset + 1);
1271	}
1272
1273	if (len < 0)
1274	croak ("length must not be negative");
1275
1276	{
1277	dREQ;
1278
1279	req->type = ix;
1280	req->sv1 = newSVsv (fh);
1281	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1282	: IoOFP (sv_2io (fh)));
1283	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1284	req->size = len;
1285	req->sv2 = SvREFCNT_inc (data);
1286	req->ptr2 = (char *)svptr + dataoffset;
1287	req->stroffset = dataoffset;
1288
1289	if (!SvREADONLY (data))
1290	{
1291	SvREADONLY_on (data);
1292	req->flags |= FLAG_SV2_RO_OFF;
1293	}
1294
1295	EIO_SEND;
1296	}
1297	}
1298
1299	void
1300	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1301	PROTOTYPE: $$;$
1302	PPCODE:
1303	{
1304	SV *data;
1305	dREQ;
1306
1307	data = newSV (NAME_MAX);
1308	SvPOK_on (data);
1309
1310	req->type = EIO_READLINK;
1311	req->sv1 = newSVsv (path);
1312	req->ptr1 = SvPVbyte_nolen (req->sv1);
1313	req->sv2 = data;
1314	req->ptr2 = SvPVbyte_nolen (data);
1315
1316	EIO_SEND;
1317	}
1318
1319	void
1320	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1321	PROTOTYPE: $$$$;$
1322	PPCODE:
1323	{
1324	dREQ;
1325
1326	req->type = EIO_SENDFILE;
1327	req->sv1 = newSVsv (out_fh);
1328	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1329	req->sv2 = newSVsv (in_fh);
1330	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1331	req->offs = SvVAL64 (in_offset);
1332	req->size = length;
1333
1334	EIO_SEND;
1335	}
1336
1337	void
1338	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1339	PROTOTYPE: $$$;$
1340	PPCODE:
1341	{
1342	dREQ;
1343
1344	req->type = EIO_READAHEAD;
1345	req->sv1 = newSVsv (fh);
1346	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1347	req->offs = SvVAL64 (offset);
1348	req->size = length;
1349
1350	EIO_SEND;
1351	}
1352
1353	void
1354	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1355	ALIAS:
1356	aio_stat = EIO_STAT
1357	aio_lstat = EIO_LSTAT
1358	PPCODE:
1359	{
1360	dREQ;
1361
1362	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1363	if (!req->ptr2)
1364	{
1365	req_destroy (req);
1366	croak ("out of memory during aio_stat statdata allocation");
1367	}
1368
1369	req->flags |= FLAG_PTR2_FREE;
1370	req->sv1 = newSVsv (fh_or_path);
1371
1372	if (SvPOK (fh_or_path))
1373	{
1374	req->type = ix;
1375	req->ptr1 = SvPVbyte_nolen (req->sv1);
1376	}
1377	else
1378	{
1379	req->type = EIO_FSTAT;
1380	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1381	}
1382
1383	EIO_SEND;
1384	}
1385
1386	void
1387	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1388	PPCODE:
1389	{
1390	dREQ;
1391
1392	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1393	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1394	req->sv1 = newSVsv (fh_or_path);
1395
1396	if (SvPOK (fh_or_path))
1397	{
1398	req->type = EIO_UTIME;
1399	req->ptr1 = SvPVbyte_nolen (req->sv1);
1400	}
1401	else
1402	{
1403	req->type = EIO_FUTIME;
1404	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1405	}
1406
1407	EIO_SEND;
1408	}
1409
1410	void
1411	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1412	PPCODE:
1413	{
1414	dREQ;
1415
1416	req->sv1 = newSVsv (fh_or_path);
1417	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1418
1419	if (SvPOK (fh_or_path))
1420	{
1421	req->type = EIO_TRUNCATE;
1422	req->ptr1 = SvPVbyte_nolen (req->sv1);
1423	}
1424	else
1425	{
1426	req->type = EIO_FTRUNCATE;
1427	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1428	}
1429
1430	EIO_SEND;
1431	}
1432
1433	void
1434	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1435	ALIAS:
1436	aio_chmod = EIO_CHMOD
1437	aio_fchmod = EIO_FCHMOD
1438	aio_mkdir = EIO_MKDIR
1439	PPCODE:
1440	{
1441	dREQ;
1442
1443	req->type = type;
1444	req->int2 = mode;
1445	req->sv1 = newSVsv (fh_or_path);
1446
1447	if (ix == EIO_FCHMOD)
1448	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1449	else
1450	req->ptr1 = SvPVbyte_nolen (req->sv1);
1451
1452	EIO_SEND;
1453	}
1454
1455	void
1456	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1457	PPCODE:
1458	{
1459	dREQ;
1460
1461	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1462	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1463	req->sv1 = newSVsv (fh_or_path);
1464
1465	if (SvPOK (fh_or_path))
1466	{
1467	req->type = EIO_CHOWN;
1468	req->ptr1 = SvPVbyte_nolen (req->sv1);
1469	}
1470	else
1471	{
1472	req->type = EIO_FCHOWN;
1473	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1474	}
1475
1476	EIO_SEND;
1477	}
1478
1479	void
1480	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1481	ALIAS:
1482	aio_unlink = EIO_UNLINK
1483	aio_rmdir = EIO_RMDIR
1484	aio_readdir = EIO_READDIR
1485	PPCODE:
1486	{
1487	dREQ;
1488
1489	req->type = ix;
1490	req->sv1 = newSVsv (pathname);
1491	req->ptr1 = SvPVbyte_nolen (req->sv1);
1492
1493	EIO_SEND;
1494	}
1495
1496	void
1497	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1498	ALIAS:
1499	aio_link = EIO_LINK
1500	aio_symlink = EIO_SYMLINK
1501	aio_rename = EIO_RENAME
1502	PPCODE:
1503	{
1504	dREQ;
1505
1506	req->type = ix;
1507	req->sv1 = newSVsv (oldpath);
1508	req->ptr1 = SvPVbyte_nolen (req->sv1);
1509	req->sv2 = newSVsv (newpath);
1510	req->ptr2 = SvPVbyte_nolen (req->sv2);
1511
1512	EIO_SEND;
1513	}
1514
1515	void
1516	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1517	PPCODE:
1518	{
1519	dREQ;
1520
1521	req->type = EIO_MKNOD;
1522	req->sv1 = newSVsv (pathname);
1523	req->ptr1 = SvPVbyte_nolen (req->sv1);
1524	req->int2 = (mode_t)mode;
1525	req->offs = dev;
1526
1527	EIO_SEND;
1528	}
1529
1530	void
1531	aio_busy (double delay, SV *callback=&PL_sv_undef)
1532	PPCODE:
1533	{
1534	dREQ;
1535
1536	req->type = EIO_BUSY;
1537	req->nv1 = delay < 0. ? 0. : delay;
1538
1539	EIO_SEND;
1540	}
1541
1542	void
1543	aio_group (SV *callback=&PL_sv_undef)
1544	PROTOTYPE: ;$
1545	PPCODE:
1546	{
1547	dREQ;
1548
1549	req->type = EIO_GROUP;
1550
1551	req_send (req);
1552	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1553	}
1554
1555	void
1556	aio_nop (SV *callback=&PL_sv_undef)
1557	ALIAS:
1558	aio_nop = EIO_NOP
1559	aio_sync = EIO_SYNC
1560	PPCODE:
1561	{
1562	dREQ;
1563
1564	#endif
1565		1775
1566	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	1776	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1567	{	1777	{
1568	grp->int2 = limit;	1778	grp->int2 = limit;
1569	grp->feed = feed;	1779	grp->feed = feed;
…		…
1580		1790
1581	void eio_grp_add (eio_req *grp, eio_req *req)	1791	void eio_grp_add (eio_req *grp, eio_req *req)
1582	{	1792	{
1583	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	1793	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
1584		1794
		1795	grp->flags |= EIO_FLAG_GROUPADD;
		1796
1585	++grp->size;	1797	++grp->size;
1586	req->grp = grp;	1798	req->grp = grp;
1587		1799
1588	req->grp_prev = 0;	1800	req->grp_prev = 0;
1589	req->grp_next = grp->grp_first;	1801	req->grp_next = grp->grp_first;
…		…
1592	grp->grp_first->grp_prev = req;	1804	grp->grp_first->grp_prev = req;
1593		1805
1594	grp->grp_first = req;	1806	grp->grp_first = req;
1595	}	1807	}
1596		1808
		1809	/*****************************************************************************/
		1810	/* misc garbage */
1597		1811
		1812	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		1813	{
		1814	etp_worker wrk;
		1815	ssize_t ret;
		1816
		1817	wrk.dbuf = 0;
		1818
		1819	ret = eio__sendfile (ofd, ifd, offset, count, &wrk);
		1820
		1821	if (wrk.dbuf)
		1822	free (wrk.dbuf);
		1823
		1824	return ret;
		1825	}
		1826

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