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Comparing libeio/eio.c (file contents):
Revision 1.2 by root, Sat May 10 23:33:40 2008 UTC vs.
Revision 1.14 by root, Sat May 17 12:17:25 2008 UTC

		1	/*
		2	* libeio implementation
		3	*
		4	* Copyright (c) 2007,2008 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"
2	#include "xthread.h"	41	#include "xthread.h"
3		42
4	#include <errno.h>	43	#include <errno.h>
5
6	#include "EXTERN.h"
7	#include "perl.h"
8	#include "XSUB.h"
9
10	#include <stddef.h>	44	#include <stddef.h>
11	#include <stdlib.h>	45	#include <stdlib.h>
		46	#include <string.h>
12	#include <errno.h>	47	#include <errno.h>
13	#include <sys/types.h>	48	#include <sys/types.h>
14	#include <sys/stat.h>	49	#include <sys/stat.h>
15	#include <limits.h>	50	#include <limits.h>
16	#include <fcntl.h>	51	#include <fcntl.h>
17	#include <sched.h>	52	#include <assert.h>
18		53
19	#ifndef EIO_FINISH	54	#ifndef EIO_FINISH
20	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	55	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
21	#endif	56	#endif
22		57
…		…
38	# include <sys/time.h>	73	# include <sys/time.h>
39	# include <sys/select.h>	74	# include <sys/select.h>
40	# include <unistd.h>	75	# include <unistd.h>
41	# include <utime.h>	76	# include <utime.h>
42	# include <signal.h>	77	# include <signal.h>
		78	# include <dirent.h>
43		79
44	# ifndef EIO_STRUCT_DIRENT	80	# ifndef EIO_STRUCT_DIRENT
45	# define EIO_STRUCT_DIRENT struct dirent	81	# define EIO_STRUCT_DIRENT struct dirent
46	# endif	82	# endif
47		83
48	#endif	84	#endif
49
50	# ifndef EIO_STRUCT_STAT
51	# define EIO_STRUCT_STAT struct stat
52	# endif
53		85
54	#if HAVE_SENDFILE	86	#if HAVE_SENDFILE
55	# if __linux	87	# if __linux
56	# include <sys/sendfile.h>	88	# include <sys/sendfile.h>
57	# elif __freebsd	89	# elif __freebsd
…		…
77	/* buffer size for various temporary buffers */	109	/* buffer size for various temporary buffers */
78	#define EIO_BUFSIZE 65536	110	#define EIO_BUFSIZE 65536
79		111
80	#define dBUF \	112	#define dBUF \
81	char *eio_buf; \	113	char *eio_buf; \
82	X_LOCK (wrklock); \	114	ETP_WORKER_LOCK (self); \
83	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	115	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \
84	X_UNLOCK (wrklock); \	116	ETP_WORKER_UNLOCK (self); \
		117	errno = ENOMEM; \
85	if (!eio_buf) \	118	if (!eio_buf) \
86	return -1;	119	return -1;
87		120
88	#define EIO_TICKS ((1000000 + 1023) >> 10)	121	#define EIO_TICKS ((1000000 + 1023) >> 10)
89		122
		123	/*****************************************************************************/
		124
		125	#define ETP_PRI_MIN EIO_PRI_MIN
		126	#define ETP_PRI_MAX EIO_PRI_MAX
		127
		128	#define ETP_REQ eio_req
		129	#define ETP_DESTROY(req) eio_destroy (req)
		130	static int eio_finish (eio_req *req);
		131	#define ETP_FINISH(req) eio_finish (req)
		132
		133	#define ETP_WORKER_CLEAR(req) \
		134	if (wrk->dbuf) \
		135	{ \
		136	free (wrk->dbuf); \
		137	wrk->dbuf = 0; \
		138	} \
		139	\
		140	if (wrk->dirp) \
		141	{ \
		142	closedir (wrk->dirp); \
		143	wrk->dirp = 0; \
		144	}
		145	#define ETP_WORKER_COMMON \
		146	void *dbuf; \
		147	DIR *dirp;
		148
		149	/*****************************************************************************/
		150
		151	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		152
		153	/* calculcate time difference in ~1/EIO_TICKS of a second */
		154	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		155	{
		156	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		157	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		158	}
		159
		160	static unsigned int started, idle, wanted = 4;
		161
90	static void (*want_poll_cb) (void);	162	static void (*want_poll_cb) (void);
91	static void (*done_poll_cb) (void);	163	static void (*done_poll_cb) (void);
92		164
93	static unsigned int max_poll_time = 0;	165	static unsigned int max_poll_time; /* reslock */
94	static unsigned int max_poll_reqs = 0;	166	static unsigned int max_poll_reqs; /* reslock */
95		167
96	/* calculcate time difference in ~1/EIO_TICKS of a second */	168	static volatile unsigned int nreqs; /* reqlock */
97	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	169	static volatile unsigned int nready; /* reqlock */
98	{	170	static volatile unsigned int npending; /* reqlock */
99	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	171	static volatile unsigned int max_idle = 4;
100	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
101	}
102		172
103	static unsigned int started, idle, wanted;
104
105	/* worker threads management */
106	static mutex_t wrklock = X_MUTEX_INIT;	173	static mutex_t wrklock = X_MUTEX_INIT;
107
108	typedef struct worker {
109	/* locked by wrklock */
110	struct worker *prev, *next;
111
112	thread_t tid;
113
114	/* locked by reslock, reqlock or wrklock */
115	eio_req *req; /* currently processed request */
116	void *dbuf;
117	DIR *dirp;
118	} worker;
119
120	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
121
122	static void worker_clear (worker *wrk)
123	{
124	if (wrk->dirp)
125	{
126	closedir (wrk->dirp);
127	wrk->dirp = 0;
128	}
129
130	if (wrk->dbuf)
131	{
132	free (wrk->dbuf);
133	wrk->dbuf = 0;
134	}
135	}
136
137	static void worker_free (worker *wrk)
138	{
139	wrk->next->prev = wrk->prev;
140	wrk->prev->next = wrk->next;
141
142	free (wrk);
143	}
144
145	static volatile unsigned int nreqs, nready, npending;
146	static volatile unsigned int max_idle = 4;
147
148	static mutex_t reslock = X_MUTEX_INIT;	174	static mutex_t reslock = X_MUTEX_INIT;
149	static mutex_t reqlock = X_MUTEX_INIT;	175	static mutex_t reqlock = X_MUTEX_INIT;
150	static cond_t reqwait = X_COND_INIT;	176	static cond_t reqwait = X_COND_INIT;
151		177
		178	typedef struct etp_worker
		179	{
		180	/* locked by wrklock */
		181	struct etp_worker *prev, *next;
		182
		183	thread_t tid;
		184
		185	/* locked by reslock, reqlock or wrklock */
		186	ETP_REQ *req; /* currently processed request */
		187
		188	ETP_WORKER_COMMON
		189	} etp_worker;
		190
		191	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
		192
		193	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		194	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
		195
		196	/* worker threads management */
		197
		198	static void etp_worker_clear (etp_worker *wrk)
		199	{
		200	ETP_WORKER_CLEAR (wrk);
		201	}
		202
		203	static void etp_worker_free (etp_worker *wrk)
		204	{
		205	wrk->next->prev = wrk->prev;
		206	wrk->prev->next = wrk->next;
		207
		208	free (wrk);
		209	}
		210
152	unsigned int eio_nreqs (void)	211	static unsigned int etp_nreqs (void)
153	{	212	{
		213	int retval;
		214	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		215	retval = nreqs;
		216	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
154	return nreqs;	217	return retval;
155	}	218	}
156		219
157	unsigned int eio_nready (void)	220	static unsigned int etp_nready (void)
158	{	221	{
159	unsigned int retval;	222	unsigned int retval;
160		223
161	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	224	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
162	retval = nready;	225	retval = nready;
163	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	226	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
164		227
165	return retval;	228	return retval;
166	}	229	}
167		230
168	unsigned int eio_npending (void)	231	static unsigned int etp_npending (void)
169	{	232	{
170	unsigned int retval;	233	unsigned int retval;
171		234
172	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	235	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
173	retval = npending;	236	retval = npending;
174	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	237	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
175		238
176	return retval;	239	return retval;
177	}	240	}
178		241
179	unsigned int eio_nthreads (void)	242	static unsigned int etp_nthreads (void)
180	{	243	{
181	unsigned int retval;	244	unsigned int retval;
182		245
183	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	246	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
184	retval = started;	247	retval = started;
…		…
191	* a somewhat faster data structure might be nice, but	254	* a somewhat faster data structure might be nice, but
192	* with 8 priorities this actually needs <20 insns	255	* with 8 priorities this actually needs <20 insns
193	* per shift, the most expensive operation.	256	* per shift, the most expensive operation.
194	*/	257	*/
195	typedef struct {	258	typedef struct {
196	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	259	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
197	int size;	260	int size;
198	} reqq;	261	} etp_reqq;
199		262
200	static reqq req_queue;	263	static etp_reqq req_queue;
201	static reqq res_queue;	264	static etp_reqq res_queue;
202		265
203	static int reqq_push (reqq *q, eio_req *req)	266	static int reqq_push (etp_reqq *q, ETP_REQ *req)
204	{	267	{
205	int pri = req->pri;	268	int pri = req->pri;
206	req->next = 0;	269	req->next = 0;
207		270
208	if (q->qe[pri])	271	if (q->qe[pri])
…		…
214	q->qe[pri] = q->qs[pri] = req;	277	q->qe[pri] = q->qs[pri] = req;
215		278
216	return q->size++;	279	return q->size++;
217	}	280	}
218		281
219	static eio_req *reqq_shift (reqq *q)	282	static ETP_REQ *reqq_shift (etp_reqq *q)
220	{	283	{
221	int pri;	284	int pri;
222		285
223	if (!q->size)	286	if (!q->size)
224	return 0;	287	return 0;
225		288
226	--q->size;	289	--q->size;
227		290
228	for (pri = EIO_NUM_PRI; pri--; )	291	for (pri = ETP_NUM_PRI; pri--; )
229	{	292	{
230	eio_req *req = q->qs[pri];	293	eio_req *req = q->qs[pri];
231		294
232	if (req)	295	if (req)
233	{	296	{
…		…
239	}	302	}
240		303
241	abort ();	304	abort ();
242	}	305	}
243		306
244	static void grp_try_feed (eio_req *grp)	307	static void etp_atfork_prepare (void)
245	{	308	{
246	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	309	X_LOCK (wrklock);
		310	X_LOCK (reqlock);
		311	X_LOCK (reslock);
		312	#if !HAVE_PREADWRITE
		313	X_LOCK (preadwritelock);
		314	#endif
		315	#if !HAVE_READDIR_R
		316	X_LOCK (readdirlock);
		317	#endif
		318	}
		319
		320	static void etp_atfork_parent (void)
		321	{
		322	#if !HAVE_READDIR_R
		323	X_UNLOCK (readdirlock);
		324	#endif
		325	#if !HAVE_PREADWRITE
		326	X_UNLOCK (preadwritelock);
		327	#endif
		328	X_UNLOCK (reslock);
		329	X_UNLOCK (reqlock);
		330	X_UNLOCK (wrklock);
		331	}
		332
		333	static void etp_atfork_child (void)
		334	{
		335	ETP_REQ *prv;
		336
		337	while (prv = reqq_shift (&req_queue))
		338	ETP_DESTROY (prv);
		339
		340	while (prv = reqq_shift (&res_queue))
		341	ETP_DESTROY (prv);
		342
		343	while (wrk_first.next != &wrk_first)
247	{	344	{
248	int old_len = grp->size;	345	etp_worker *wrk = wrk_first.next;
249		346
250	EIO_FEED (grp);	347	if (wrk->req)
		348	ETP_DESTROY (wrk->req);
251		349
252	/* stop if no progress has been made */	350	etp_worker_clear (wrk);
253	if (old_len == grp->size)	351	etp_worker_free (wrk);
254	{
255	grp->feed = 0;
256	break;
257	}
258	}
259	}
260
261	static int eio_finish (eio_req *req);
262
263	static int grp_dec (eio_req *grp)
264	{
265	--grp->size;
266
267	/* call feeder, if applicable */
268	grp_try_feed (grp);
269
270	/* finish, if done */
271	if (!grp->size && grp->int1)
272	return eio_finish (grp);
273	else
274	return 0;
275	}
276
277	void eio_destroy (eio_req *req)
278	{
279	if ((req)->flags & EIO_FLAG_PTR2_FREE)
280	free (req->ptr2);
281
282	EIO_DESTROY (req);
283	}
284
285	static int eio_finish (eio_req *req)
286	{
287	int res = EIO_FINISH (req);
288
289	if (req->grp)
290	{	352	}
291	int res2;
292	eio_req *grp = req->grp;
293		353
294	/* unlink request */	354	started = 0;
295	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;	355	idle = 0;
296	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;	356	nreqs = 0;
		357	nready = 0;
		358	npending = 0;
297		359
298	if (grp->grp_first == req)	360	etp_atfork_parent ();
299	grp->grp_first = req->grp_next;
300
301	res2 = grp_dec (grp);
302
303	if (!res && res2)
304	res = res2;
305	}
306
307	eio_destroy (req);
308
309	return res;
310	}	361	}
311		362
312	void eio_grp_cancel (eio_req *grp)	363	static void
313	{	364	etp_once_init (void)
314	for (grp = grp->grp_first; grp; grp = grp->grp_next)	365	{
315	eio_cancel (grp);	366	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
316	}	367	}
317		368
318	void eio_cancel (eio_req *req)	369	static int
		370	etp_init (void (*want_poll)(void), void (*done_poll)(void))
319	{	371	{
320	req->flags |= EIO_FLAG_CANCELLED;	372	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
321		373
322	eio_grp_cancel (req);	374	pthread_once (&doinit, etp_once_init);
323	}
324		375
		376	want_poll_cb = want_poll;
		377	done_poll_cb = done_poll;
		378	}
		379
325	X_THREAD_PROC (eio_proc);	380	X_THREAD_PROC (etp_proc);
326		381
327	static void start_thread (void)	382	static void etp_start_thread (void)
328	{	383	{
329	worker *wrk = calloc (1, sizeof (worker));	384	etp_worker *wrk = calloc (1, sizeof (etp_worker));
330		385
331	if (!wrk)	386	/*TODO*/
332	croak ("unable to allocate worker thread data");	387	assert (("unable to allocate worker thread data", wrk));
333		388
334	X_LOCK (wrklock);	389	X_LOCK (wrklock);
335		390
336	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	391	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
337	{	392	{
338	wrk->prev = &wrk_first;	393	wrk->prev = &wrk_first;
339	wrk->next = wrk_first.next;	394	wrk->next = wrk_first.next;
340	wrk_first.next->prev = wrk;	395	wrk_first.next->prev = wrk;
341	wrk_first.next = wrk;	396	wrk_first.next = wrk;
…		…
345	free (wrk);	400	free (wrk);
346		401
347	X_UNLOCK (wrklock);	402	X_UNLOCK (wrklock);
348	}	403	}
349		404
350	static void maybe_start_thread (void)	405	static void etp_maybe_start_thread (void)
351	{	406	{
352	if (eio_nthreads () >= wanted)	407	if (etp_nthreads () >= wanted)
353	return;	408	return;
354		409
355	/* todo: maybe use idle here, but might be less exact */	410	/* todo: maybe use idle here, but might be less exact */
356	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	411	if (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ())
357	return;	412	return;
358		413
359	start_thread ();	414	etp_start_thread ();
360	}	415	}
361		416
362	void eio_submit (eio_req *req)
363	{
364	++nreqs;
365
366	X_LOCK (reqlock);
367	++nready;
368	reqq_push (&req_queue, req);
369	X_COND_SIGNAL (reqwait);
370	X_UNLOCK (reqlock);
371
372	maybe_start_thread ();
373	}
374
375	static void end_thread (void)	417	static void etp_end_thread (void)
376	{	418	{
377	eio_req *req = calloc (1, sizeof (eio_req));	419	eio_req *req = calloc (1, sizeof (eio_req));
378		420
379	req->type = EIO_QUIT;	421	req->type = -1;
380	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	422	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
381		423
382	X_LOCK (reqlock);	424	X_LOCK (reqlock);
383	reqq_push (&req_queue, req);	425	reqq_push (&req_queue, req);
384	X_COND_SIGNAL (reqwait);	426	X_COND_SIGNAL (reqwait);
385	X_UNLOCK (reqlock);	427	X_UNLOCK (reqlock);
…		…
387	X_LOCK (wrklock);	429	X_LOCK (wrklock);
388	--started;	430	--started;
389	X_UNLOCK (wrklock);	431	X_UNLOCK (wrklock);
390	}	432	}
391		433
392	void eio_set_max_poll_time (double nseconds)
393	{
394	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
395	max_poll_time = nseconds;
396	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
397	}
398
399	void eio_set_max_poll_reqs (unsigned int maxreqs)
400	{
401	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
402	max_poll_reqs = maxreqs;
403	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
404	}
405
406	void eio_set_max_idle (unsigned int nthreads)
407	{
408	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
409	max_idle = nthreads <= 0 ? 1 : nthreads;
410	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
411	}
412
413	void eio_set_min_parallel (unsigned int nthreads)
414	{
415	if (wanted < nthreads)
416	wanted = nthreads;
417	}
418
419	void eio_set_max_parallel (unsigned int nthreads)
420	{
421	if (wanted > nthreads)
422	wanted = nthreads;
423
424	while (started > wanted)
425	end_thread ();
426	}
427
428	int eio_poll (void)	434	static int etp_poll (void)
429	{	435	{
430	int maxreqs = max_poll_reqs;	436	unsigned int maxreqs;
		437	unsigned int maxtime;
431	struct timeval tv_start, tv_now;	438	struct timeval tv_start, tv_now;
432	eio_req *req;
433		439
		440	X_LOCK (reslock);
		441	maxreqs = max_poll_reqs;
		442	maxtime = max_poll_time;
		443	X_UNLOCK (reslock);
		444
434	if (max_poll_time)	445	if (maxtime)
435	gettimeofday (&tv_start, 0);	446	gettimeofday (&tv_start, 0);
436		447
437	for (;;)	448	for (;;)
438	{	449	{
		450	ETP_REQ *req;
		451
439	maybe_start_thread ();	452	etp_maybe_start_thread ();
440		453
441	X_LOCK (reslock);	454	X_LOCK (reslock);
442	req = reqq_shift (&res_queue);	455	req = reqq_shift (&res_queue);
443		456
444	if (req)	457	if (req)
…		…
452	X_UNLOCK (reslock);	465	X_UNLOCK (reslock);
453		466
454	if (!req)	467	if (!req)
455	return 0;	468	return 0;
456		469
		470	X_LOCK (reqlock);
457	--nreqs;	471	--nreqs;
		472	X_UNLOCK (reqlock);
458		473
459	if (req->type == EIO_GROUP && req->size)	474	if (req->type == EIO_GROUP && req->size)
460	{	475	{
461	req->int1 = 1; /* mark request as delayed */	476	req->int1 = 1; /* mark request as delayed */
462	continue;	477	continue;
463	}	478	}
464	else	479	else
465	{	480	{
466	int res = eio_finish (req);	481	int res = ETP_FINISH (req);
467	if (res)	482	if (res)
468	return res;	483	return res;
469	}	484	}
470		485
471	if (maxreqs && !--maxreqs)	486	if (maxreqs && !--maxreqs)
472	break;	487	break;
473		488
474	if (max_poll_time)	489	if (maxtime)
475	{	490	{
476	gettimeofday (&tv_now, 0);	491	gettimeofday (&tv_now, 0);
477		492
478	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	493	if (tvdiff (&tv_start, &tv_now) >= maxtime)
479	break;	494	break;
480	}	495	}
481	}	496	}
482		497
483	errno = EAGAIN;	498	errno = EAGAIN;
484	return -1;	499	return -1;
485	}	500	}
486		501
		502	static void etp_cancel (ETP_REQ *req)
		503	{
		504	X_LOCK (wrklock);
		505	req->flags |= EIO_FLAG_CANCELLED;
		506	X_UNLOCK (wrklock);
		507
		508	eio_grp_cancel (req);
		509	}
		510
		511	static void etp_submit (ETP_REQ *req)
		512	{
		513	req->pri -= ETP_PRI_MIN;
		514
		515	if (req->pri < ETP_PRI_MIN - ETP_PRI_MIN) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
		516	if (req->pri > ETP_PRI_MAX - ETP_PRI_MIN) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		517
		518	X_LOCK (reqlock);
		519	++nreqs;
		520	++nready;
		521	reqq_push (&req_queue, req);
		522	X_COND_SIGNAL (reqwait);
		523	X_UNLOCK (reqlock);
		524
		525	etp_maybe_start_thread ();
		526	}
		527
		528	static void etp_set_max_poll_time (double nseconds)
		529	{
		530	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		531	max_poll_time = nseconds;
		532	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		533	}
		534
		535	static void etp_set_max_poll_reqs (unsigned int maxreqs)
		536	{
		537	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		538	max_poll_reqs = maxreqs;
		539	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		540	}
		541
		542	static void etp_set_max_idle (unsigned int nthreads)
		543	{
		544	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		545	max_idle = nthreads <= 0 ? 1 : nthreads;
		546	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		547	}
		548
		549	static void etp_set_min_parallel (unsigned int nthreads)
		550	{
		551	if (wanted < nthreads)
		552	wanted = nthreads;
		553	}
		554
		555	static void etp_set_max_parallel (unsigned int nthreads)
		556	{
		557	if (wanted > nthreads)
		558	wanted = nthreads;
		559
		560	while (started > wanted)
		561	etp_end_thread ();
		562	}
		563
		564	/*****************************************************************************/
		565
		566	static void grp_try_feed (eio_req *grp)
		567	{
		568	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
		569	{
		570	int old_len = grp->size;
		571
		572	EIO_FEED (grp);
		573
		574	/* stop if no progress has been made */
		575	if (old_len == grp->size)
		576	{
		577	grp->feed = 0;
		578	break;
		579	}
		580	}
		581	}
		582
		583	static int grp_dec (eio_req *grp)
		584	{
		585	--grp->size;
		586
		587	/* call feeder, if applicable */
		588	grp_try_feed (grp);
		589
		590	/* finish, if done */
		591	if (!grp->size && grp->int1)
		592	return eio_finish (grp);
		593	else
		594	return 0;
		595	}
		596
		597	void eio_destroy (eio_req *req)
		598	{
		599	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
		600	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
		601
		602	EIO_DESTROY (req);
		603	}
		604
		605	static int eio_finish (eio_req *req)
		606	{
		607	int res = EIO_FINISH (req);
		608
		609	if (req->grp)
		610	{
		611	int res2;
		612	eio_req *grp = req->grp;
		613
		614	/* unlink request */
		615	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		616	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		617
		618	if (grp->grp_first == req)
		619	grp->grp_first = req->grp_next;
		620
		621	res2 = grp_dec (grp);
		622
		623	if (!res && res2)
		624	res = res2;
		625	}
		626
		627	eio_destroy (req);
		628
		629	return res;
		630	}
		631
		632	void eio_grp_cancel (eio_req *grp)
		633	{
		634	for (grp = grp->grp_first; grp; grp = grp->grp_next)
		635	eio_cancel (grp);
		636	}
		637
		638	void eio_cancel (eio_req *req)
		639	{
		640	etp_cancel (req);
		641	}
		642
		643	void eio_submit (eio_req *req)
		644	{
		645	etp_submit (req);
		646	}
		647
		648	unsigned int eio_nreqs (void)
		649	{
		650	return etp_nreqs ();
		651	}
		652
		653	unsigned int eio_nready (void)
		654	{
		655	return etp_nready ();
		656	}
		657
		658	unsigned int eio_npending (void)
		659	{
		660	return etp_npending ();
		661	}
		662
		663	unsigned int eio_nthreads (void)
		664	{
		665	return etp_nthreads ();
		666	}
		667
		668	void eio_set_max_poll_time (double nseconds)
		669	{
		670	etp_set_max_poll_time (nseconds);
		671	}
		672
		673	void eio_set_max_poll_reqs (unsigned int maxreqs)
		674	{
		675	etp_set_max_poll_reqs (maxreqs);
		676	}
		677
		678	void eio_set_max_idle (unsigned int nthreads)
		679	{
		680	etp_set_max_idle (nthreads);
		681	}
		682
		683	void eio_set_min_parallel (unsigned int nthreads)
		684	{
		685	etp_set_min_parallel (nthreads);
		686	}
		687
		688	void eio_set_max_parallel (unsigned int nthreads)
		689	{
		690	etp_set_max_parallel (nthreads);
		691	}
		692
		693	int eio_poll (void)
		694	{
		695	return etp_poll ();
		696	}
		697
487	/*****************************************************************************/	698	/*****************************************************************************/
488	/* work around various missing functions */	699	/* work around various missing functions */
489		700
490	#if !HAVE_PREADWRITE	701	#if !HAVE_PREADWRITE
491	# define pread aio_pread	702	# define pread eio__pread
492	# define pwrite aio_pwrite	703	# define pwrite eio__pwrite
493		704
494	/*	705	/*
495	* make our pread/pwrite safe against themselves, but not against	706	* make our pread/pwrite safe against themselves, but not against
496	* normal read/write by using a mutex. slows down execution a lot,	707	* normal read/write by using a mutex. slows down execution a lot,
497	* but that's your problem, not mine.	708	* but that's your problem, not mine.
498	*/	709	*/
499	static mutex_t preadwritelock = X_MUTEX_INIT;	710	static mutex_t preadwritelock = X_MUTEX_INIT;
500		711
501	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	712	static ssize_t
		713	eio__pread (int fd, void *buf, size_t count, off_t offset)
502	{	714	{
503	ssize_t res;	715	ssize_t res;
504	off_t ooffset;	716	off_t ooffset;
505		717
506	X_LOCK (preadwritelock);	718	X_LOCK (preadwritelock);
…		…
511	X_UNLOCK (preadwritelock);	723	X_UNLOCK (preadwritelock);
512		724
513	return res;	725	return res;
514	}	726	}
515		727
516	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	728	static ssize_t
		729	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
517	{	730	{
518	ssize_t res;	731	ssize_t res;
519	off_t ooffset;	732	off_t ooffset;
520		733
521	X_LOCK (preadwritelock);	734	X_LOCK (preadwritelock);
…		…
529	}	742	}
530	#endif	743	#endif
531		744
532	#ifndef HAVE_FUTIMES	745	#ifndef HAVE_FUTIMES
533		746
534	# define utimes(path,times) aio_utimes (path, times)	747	# define utimes(path,times) eio__utimes (path, times)
535	# define futimes(fd,times) aio_futimes (fd, times)	748	# define futimes(fd,times) eio__futimes (fd, times)
536		749
		750	static int
537	static int aio_utimes (const char *filename, const struct timeval times[2])	751	eio__utimes (const char *filename, const struct timeval times[2])
538	{	752	{
539	if (times)	753	if (times)
540	{	754	{
541	struct utimbuf buf;	755	struct utimbuf buf;
542		756
…		…
547	}	761	}
548	else	762	else
549	return utime (filename, 0);	763	return utime (filename, 0);
550	}	764	}
551		765
552	static int aio_futimes (int fd, const struct timeval tv[2])	766	static int eio__futimes (int fd, const struct timeval tv[2])
553	{	767	{
554	errno = ENOSYS;	768	errno = ENOSYS;
555	return -1;	769	return -1;
556	}	770	}
557		771
…		…
560	#if !HAVE_FDATASYNC	774	#if !HAVE_FDATASYNC
561	# define fdatasync fsync	775	# define fdatasync fsync
562	#endif	776	#endif
563		777
564	#if !HAVE_READAHEAD	778	#if !HAVE_READAHEAD
565	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	779	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
566		780
		781	static ssize_t
567	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	782	eio__readahead (int fd, off_t offset, size_t count, worker *self)
568	{	783	{
569	size_t todo = count;	784	size_t todo = count;
570	dBUF;	785	dBUF;
571		786
572	while (todo > 0)	787	while (todo > 0)
573	{	788	{
574	size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;	789	size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE;
575		790
576	pread (fd, aio_buf, len, offset);	791	pread (fd, eio_buf, len, offset);
577	offset += len;	792	offset += len;
578	todo -= len;	793	todo -= len;
579	}	794	}
580		795
581	errno = 0;	796	errno = 0;
…		…
583	}	798	}
584		799
585	#endif	800	#endif
586		801
587	#if !HAVE_READDIR_R	802	#if !HAVE_READDIR_R
588	# define readdir_r aio_readdir_r	803	# define readdir_r eio__readdir_r
589		804
590	static mutex_t readdirlock = X_MUTEX_INIT;	805	static mutex_t readdirlock = X_MUTEX_INIT;
591		806
592	static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)	807	static int
		808	eio__readdir_r (DIR *dirp, EIO_STRUCT_DIRENT *ent, EIO_STRUCT_DIRENT **res)
593	{	809	{
594	X_DIRENT *e;	810	EIO_STRUCT_DIRENT *e;
595	int errorno;	811	int errorno;
596		812
597	X_LOCK (readdirlock);	813	X_LOCK (readdirlock);
598		814
599	e = readdir (dirp);	815	e = readdir (dirp);
…		…
613	return e ? 0 : -1;	829	return e ? 0 : -1;
614	}	830	}
615	#endif	831	#endif
616		832
617	/* sendfile always needs emulation */	833	/* sendfile always needs emulation */
		834	static ssize_t
618	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	835	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
619	{	836	{
620	ssize_t res;	837	ssize_t res;
621		838
622	if (!count)	839	if (!count)
623	return 0;	840	return 0;
…		…
706		923
707	return res;	924	return res;
708	}	925	}
709		926
710	/* read a full directory */	927	/* read a full directory */
		928	static void
711	static void scandir_ (eio_req *req, worker *self)	929	eio__scandir (eio_req *req, etp_worker *self)
712	{	930	{
713	DIR *dirp;	931	DIR *dirp;
714	union	932	union
715	{	933	{
716	EIO_STRUCT_DIRENT d;	934	EIO_STRUCT_DIRENT d;
…		…
768	req->result = res;	986	req->result = res;
769	}	987	}
770		988
771	/*****************************************************************************/	989	/*****************************************************************************/
772		990
		991	#define ALLOC(len) \
		992	if (!req->ptr2) \
		993	{ \
		994	X_LOCK (wrklock); \
		995	req->flags |= EIO_FLAG_PTR2_FREE; \
		996	X_UNLOCK (wrklock); \
		997	req->ptr2 = malloc (len); \
		998	if (!req->ptr2) \
		999	{ \
		1000	errno = ENOMEM; \
		1001	req->result = -1; \
		1002	break; \
		1003	} \
		1004	}
		1005
773	X_THREAD_PROC (eio_proc)	1006	X_THREAD_PROC (etp_proc)
774	{	1007	{
775	eio_req *req;	1008	ETP_REQ *req;
776	struct timespec ts;	1009	struct timespec ts;
777	worker *self = (worker *)thr_arg;	1010	etp_worker *self = (etp_worker *)thr_arg;
778		1011
779	/* try to distribute timeouts somewhat randomly */	1012	/* try to distribute timeouts somewhat randomly */
780	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1013	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
781		1014
782	for (;;)	1015	for (;;)
783	{	1016	{
784	ts.tv_sec = time (0) + IDLE_TIMEOUT;
785
786	X_LOCK (reqlock);	1017	X_LOCK (reqlock);
787		1018
788	for (;;)	1019	for (;;)
789	{	1020	{
790	self->req = req = reqq_shift (&req_queue);	1021	self->req = req = reqq_shift (&req_queue);
…		…
792	if (req)	1023	if (req)
793	break;	1024	break;
794		1025
795	++idle;	1026	++idle;
796		1027
		1028	ts.tv_sec = time (0) + IDLE_TIMEOUT;
797	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1029	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
798	{	1030	{
799	if (idle > max_idle)	1031	if (idle > max_idle)
800	{	1032	{
801	--idle;	1033	--idle;
…		…
806	goto quit;	1038	goto quit;
807	}	1039	}
808		1040
809	/* we are allowed to idle, so do so without any timeout */	1041	/* we are allowed to idle, so do so without any timeout */
810	X_COND_WAIT (reqwait, reqlock);	1042	X_COND_WAIT (reqwait, reqlock);
811	ts.tv_sec = time (0) + IDLE_TIMEOUT;
812	}	1043	}
813		1044
814	--idle;	1045	--idle;
815	}	1046	}
816		1047
…		…
821	errno = 0; /* strictly unnecessary */	1052	errno = 0; /* strictly unnecessary */
822		1053
823	if (!EIO_CANCELLED (req))	1054	if (!EIO_CANCELLED (req))
824	switch (req->type)	1055	switch (req->type)
825	{	1056	{
		1057	case EIO_READ: ALLOC (req->size);
826	case EIO_READ: req->result = req->offs >= 0	1058	req->result = req->offs >= 0
827	? pread (req->int1, req->ptr2, req->size, req->offs)	1059	? pread (req->int1, req->ptr2, req->size, req->offs)
828	: read (req->int1, req->ptr2, req->size); break;	1060	: read (req->int1, req->ptr2, req->size); break;
829	case EIO_WRITE: req->result = req->offs >= 0	1061	case EIO_WRITE: req->result = req->offs >= 0
830	? pwrite (req->int1, req->ptr2, req->size, req->offs)	1062	? pwrite (req->int1, req->ptr2, req->size, req->offs)
831	: write (req->int1, req->ptr2, req->size); break;	1063	: write (req->int1, req->ptr2, req->size); break;
832		1064
833	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;	1065	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
834	case EIO_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;	1066	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
835		1067
		1068	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
836	case EIO_STAT: req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;	1069	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1070	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
837	case EIO_LSTAT: req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;	1071	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1072	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
838	case EIO_FSTAT: req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;	1073	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
839		1074
840	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;	1075	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
841	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;	1076	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
842	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;	1077	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
843	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;	1078	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
…		…
852	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;	1087	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
853	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;	1088	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
854	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;	1089	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
855	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;	1090	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
856	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;	1091	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
		1092
		1093	case EIO_READLINK: ALLOC (NAME_MAX);
857	case EIO_READLINK: req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;	1094	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
858		1095
859	case EIO_SYNC: req->result = 0; sync (); break;	1096	case EIO_SYNC: req->result = 0; sync (); break;
860	case EIO_FSYNC: req->result = fsync (req->int1); break;	1097	case EIO_FSYNC: req->result = fsync (req->int1); break;
861	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;	1098	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
862		1099
863	case EIO_READDIR: scandir_ (req, self); break;	1100	case EIO_READDIR: eio__scandir (req, self); break;
864		1101
865	case EIO_BUSY:	1102	case EIO_BUSY:
866	#ifdef _WIN32	1103	#ifdef _WIN32
867	Sleep (req->nv1 * 1000.);	1104	Sleep (req->nv1 * 1000.);
868	#else	1105	#else
…		…
901	: utimes (req->ptr1, times);	1138	: utimes (req->ptr1, times);
902	}	1139	}
903		1140
904	case EIO_GROUP:	1141	case EIO_GROUP:
905	case EIO_NOP:	1142	case EIO_NOP:
		1143	req->result = 0;
906	break;	1144	break;
907		1145
908	case EIO_QUIT:	1146	case -1:
909	goto quit;	1147	goto quit;
910		1148
911	default:	1149	default:
912	req->result = -1;	1150	req->result = -1;
913	break;	1151	break;
…		…
921		1159
922	if (!reqq_push (&res_queue, req) && want_poll_cb)	1160	if (!reqq_push (&res_queue, req) && want_poll_cb)
923	want_poll_cb ();	1161	want_poll_cb ();
924		1162
925	self->req = 0;	1163	self->req = 0;
926	worker_clear (self);	1164	etp_worker_clear (self);
927		1165
928	X_UNLOCK (reslock);	1166	X_UNLOCK (reslock);
929	}	1167	}
930		1168
931	quit:	1169	quit:
932	X_LOCK (wrklock);	1170	X_LOCK (wrklock);
933	worker_free (self);	1171	etp_worker_free (self);
934	X_UNLOCK (wrklock);	1172	X_UNLOCK (wrklock);
935		1173
936	return 0;	1174	return 0;
937	}	1175	}
938		1176
939	/*****************************************************************************/	1177	/*****************************************************************************/
940		1178
941	static void eio_atfork_prepare (void)	1179	int eio_init (void (*want_poll)(void), void (*done_poll)(void))
942	{	1180	{
943	X_LOCK (wrklock);	1181	etp_init (want_poll, done_poll);
944	X_LOCK (reqlock);
945	X_LOCK (reslock);
946	#if !HAVE_PREADWRITE
947	X_LOCK (preadwritelock);
948	#endif
949	#if !HAVE_READDIR_R
950	X_LOCK (readdirlock);
951	#endif
952	}	1182	}
953		1183
954	static void eio_atfork_parent (void)	1184	static void eio_api_destroy (eio_req *req)
955	{	1185	{
956	#if !HAVE_READDIR_R	1186	free (req);
957	X_UNLOCK (readdirlock);
958	#endif
959	#if !HAVE_PREADWRITE
960	X_UNLOCK (preadwritelock);
961	#endif
962	X_UNLOCK (reslock);
963	X_UNLOCK (reqlock);
964	X_UNLOCK (wrklock);
965	}	1187	}
966		1188
967	static void eio_atfork_child (void)	1189	#define REQ(rtype) \
968	{	1190	eio_req *req; \
969	eio_req *prv;	1191	\
		1192	req = (eio_req *)calloc (1, sizeof *req); \
		1193	if (!req) \
		1194	return 0; \
		1195	\
		1196	req->type = rtype; \
		1197	req->pri = pri; \
		1198	req->finish = cb; \
		1199	req->data = data; \
		1200	req->destroy = eio_api_destroy;
970		1201
971	while (prv = reqq_shift (&req_queue))	1202	#define SEND eio_submit (req); return req
972	eio_destroy (prv);
973		1203
974	while (prv = reqq_shift (&res_queue))	1204	#define PATH \
975	eio_destroy (prv);	1205	req->flags |= EIO_FLAG_PTR1_FREE; \
		1206	req->ptr1 = strdup (path); \
		1207	if (!req->ptr1) \
		1208	{ \
		1209	eio_api_destroy (req); \
		1210	return 0; \
		1211	}
976		1212
977	while (wrk_first.next != &wrk_first)	1213	#ifndef EIO_NO_WRAPPERS
		1214
		1215	eio_req *eio_nop (int pri, eio_cb cb, void *data)
		1216	{
		1217	REQ (EIO_NOP); SEND;
		1218	}
		1219
		1220	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
		1221	{
		1222	REQ (EIO_BUSY); req->nv1 = delay; SEND;
		1223	}
		1224
		1225	eio_req *eio_sync (int pri, eio_cb cb, void *data)
		1226	{
		1227	REQ (EIO_SYNC); SEND;
		1228	}
		1229
		1230	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		1231	{
		1232	REQ (EIO_FSYNC); req->int1 = fd; SEND;
		1233	}
		1234
		1235	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
		1236	{
		1237	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
		1238	}
		1239
		1240	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		1241	{
		1242	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		1243	}
		1244
		1245	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
		1246	{
		1247	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
		1248	}
		1249
		1250	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		1251	{
		1252	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		1253	}
		1254
		1255	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		1256	{
		1257	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		1258	}
		1259
		1260	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
		1261	{
		1262	REQ (EIO_FSTAT); req->int1 = fd; SEND;
		1263	}
		1264
		1265	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
		1266	{
		1267	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
		1268	}
		1269
		1270	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
		1271	{
		1272	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
		1273	}
		1274
		1275	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
		1276	{
		1277	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
		1278	}
		1279
		1280	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
		1281	{
		1282	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		1283	}
		1284
		1285	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
		1286	{
		1287	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
		1288	}
		1289
		1290	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
		1291	{
		1292	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
		1293	}
		1294
		1295	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
		1296	{
		1297	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
		1298	}
		1299
		1300	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
		1301	{
		1302	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
		1303	}
		1304
		1305	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
		1306	{
		1307	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
		1308	}
		1309
		1310	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
		1311	{
		1312	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		1313	}
		1314
		1315	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
		1316	{
		1317	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
		1318	}
		1319
		1320	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
		1321	{
		1322	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
		1323	}
		1324
		1325	static eio_req *
		1326	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
		1327	{
		1328	REQ (type); PATH; SEND;
		1329	}
		1330
		1331	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		1332	{
		1333	return eio__1path (EIO_READLINK, path, pri, cb, data);
		1334	}
		1335
		1336	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		1337	{
		1338	return eio__1path (EIO_STAT, path, pri, cb, data);
		1339	}
		1340
		1341	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		1342	{
		1343	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		1344	}
		1345
		1346	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		1347	{
		1348	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		1349	}
		1350
		1351	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
		1352	{
		1353	return eio__1path (EIO_RMDIR, path, pri, cb, data);
		1354	}
		1355
		1356	eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data)
		1357	{
		1358	return eio__1path (EIO_READDIR, path, pri, cb, data);
		1359	}
		1360
		1361	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
		1362	{
		1363	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND;
		1364	}
		1365
		1366	static eio_req *
		1367	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1368	{
		1369	REQ (type); PATH;
		1370
		1371	req->flags |= EIO_FLAG_PTR2_FREE;
		1372	req->ptr2 = strdup (new_path);
		1373	if (!req->ptr2)
978	{	1374	{
979	worker *wrk = wrk_first.next;
980
981	if (wrk->req)
982	eio_destroy (wrk->req);	1375	eio_api_destroy (req);
983		1376	return 0;
984	worker_clear (wrk);
985	worker_free (wrk);
986	}	1377	}
987		1378
988	started = 0;	1379	SEND;
989	idle = 0;
990	nreqs = 0;
991	nready = 0;
992	npending = 0;
993
994	eio_atfork_parent ();
995	}	1380	}
996		1381
997	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1382	eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
998	{	1383	{
999	want_poll_cb = want_poll;	1384	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
1000	done_poll_cb = done_poll;
1001
1002	#ifdef _WIN32
1003	X_MUTEX_CHECK (wrklock);
1004	X_MUTEX_CHECK (reslock);
1005	X_MUTEX_CHECK (reqlock);
1006	X_MUTEX_CHECK (reqwait);
1007	X_MUTEX_CHECK (preadwritelock);
1008	X_MUTEX_CHECK (readdirlock);
1009
1010	X_COND_CHECK (reqwait);
1011	#endif
1012
1013	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);
1014	}	1385	}
1015		1386
1016	#if 0	1387	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1017
1018	eio_req *eio_fsync (int fd, eio_cb cb);
1019	eio_req *eio_fdatasync (int fd, eio_cb cb);
1020	eio_req *eio_dupclose (int fd, eio_cb cb);
1021	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb);
1022	eio_req *eio_read (int fd, off_t offs, size_t length, char *data, eio_cb cb);
1023	eio_req *eio_write (int fd, off_t offs, size_t length, char *data, eio_cb cb);
1024	eio_req *eio_fstat (int fd, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */
1025	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb);
1026	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb);
1027	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb);
1028	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb);
1029	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb);
1030	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb);
1031	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb);
1032	eio_req *eio_readlink (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */
1033	eio_req *eio_stat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */
1034	eio_req *eio_lstat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */
1035	eio_req *eio_utime (const char *path, double atime, double mtime, eio_cb cb);
1036	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb);
1037	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb);
1038	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb);
1039	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb);
1040	eio_req *eio_unlink (const char *path, eio_cb cb);
1041	eio_req *eio_rmdir (const char *path, eio_cb cb);
1042	eio_req *eio_readdir (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */
1043	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb);
1044	eio_req *eio_busy (double delay, eio_cb cb); /* ties a thread for this long, simulating busyness */
1045	eio_req *eio_nop (eio_cb cb); /* does nothing except go through the whole process */
1046	void
1047	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1048	PROTOTYPE: $$$;$
1049	PPCODE:
1050	{	1388	{
1051	dREQ;	1389	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
1052
1053	req->type = EIO_OPEN;
1054	req->sv1 = newSVsv (pathname);
1055	req->ptr1 = SvPVbyte_nolen (req->sv1);
1056	req->int1 = flags;
1057	req->int2 = mode;
1058
1059	EIO_SEND;
1060	}	1390	}
1061		1391
1062	void	1392	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1063	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1064	PROTOTYPE: $;$
1065	ALIAS:
1066	aio_fsync = EIO_FSYNC
1067	aio_fdatasync = EIO_FDATASYNC
1068	PPCODE:
1069	{	1393	{
1070	dREQ;	1394	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
1071
1072	req->type = ix;
1073	req->sv1 = newSVsv (fh);
1074	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1075
1076	EIO_SEND (req);
1077	}	1395	}
1078		1396
1079	void
1080	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1081	PROTOTYPE: $;$
1082	PPCODE:
1083	{
1084	dREQ;
1085
1086	req->type = EIO_CLOSE;
1087	req->sv1 = newSVsv (fh);
1088	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1089
1090	EIO_SEND (req);
1091	}
1092
1093	void
1094	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1095	ALIAS:
1096	aio_read = EIO_READ
1097	aio_write = EIO_WRITE
1098	PROTOTYPE: $$$$$;$
1099	PPCODE:
1100	{
1101	STRLEN svlen;
1102	char *svptr = SvPVbyte (data, svlen);
1103	UV len = SvUV (length);
1104
1105	SvUPGRADE (data, SVt_PV);
1106	SvPOK_on (data);
1107
1108	if (dataoffset < 0)
1109	dataoffset += svlen;
1110
1111	if (dataoffset < 0 || dataoffset > svlen)
1112	croak ("dataoffset outside of data scalar");
1113
1114	if (ix == EIO_WRITE)
1115	{
1116	/* write: check length and adjust. */
1117	if (!SvOK (length) || len + dataoffset > svlen)
1118	len = svlen - dataoffset;
1119	}
1120	else
1121	{
1122	/* read: grow scalar as necessary */
1123	svptr = SvGROW (data, len + dataoffset + 1);
1124	}
1125
1126	if (len < 0)
1127	croak ("length must not be negative");
1128
1129	{
1130	dREQ;
1131
1132	req->type = ix;
1133	req->sv1 = newSVsv (fh);
1134	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1135	: IoOFP (sv_2io (fh)));
1136	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1137	req->size = len;
1138	req->sv2 = SvREFCNT_inc (data);
1139	req->ptr2 = (char *)svptr + dataoffset;
1140	req->stroffset = dataoffset;
1141
1142	if (!SvREADONLY (data))
1143	{
1144	SvREADONLY_on (data);
1145	req->flags |= FLAG_SV2_RO_OFF;
1146	}
1147
1148	EIO_SEND;
1149	}
1150	}
1151
1152	void
1153	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1154	PROTOTYPE: $$;$
1155	PPCODE:
1156	{
1157	SV *data;
1158	dREQ;
1159
1160	data = newSV (NAME_MAX);
1161	SvPOK_on (data);
1162
1163	req->type = EIO_READLINK;
1164	req->sv1 = newSVsv (path);
1165	req->ptr1 = SvPVbyte_nolen (req->sv1);
1166	req->sv2 = data;
1167	req->ptr2 = SvPVbyte_nolen (data);
1168
1169	EIO_SEND;
1170	}
1171
1172	void
1173	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1174	PROTOTYPE: $$$$;$
1175	PPCODE:
1176	{
1177	dREQ;
1178
1179	req->type = EIO_SENDFILE;
1180	req->sv1 = newSVsv (out_fh);
1181	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1182	req->sv2 = newSVsv (in_fh);
1183	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1184	req->offs = SvVAL64 (in_offset);
1185	req->size = length;
1186
1187	EIO_SEND;
1188	}
1189
1190	void
1191	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1192	PROTOTYPE: $$$;$
1193	PPCODE:
1194	{
1195	dREQ;
1196
1197	req->type = EIO_READAHEAD;
1198	req->sv1 = newSVsv (fh);
1199	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1200	req->offs = SvVAL64 (offset);
1201	req->size = length;
1202
1203	EIO_SEND;
1204	}
1205
1206	void
1207	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1208	ALIAS:
1209	aio_stat = EIO_STAT
1210	aio_lstat = EIO_LSTAT
1211	PPCODE:
1212	{
1213	dREQ;
1214
1215	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1216	if (!req->ptr2)
1217	{
1218	req_destroy (req);
1219	croak ("out of memory during aio_stat statdata allocation");
1220	}
1221
1222	req->flags |= FLAG_PTR2_FREE;
1223	req->sv1 = newSVsv (fh_or_path);
1224
1225	if (SvPOK (fh_or_path))
1226	{
1227	req->type = ix;
1228	req->ptr1 = SvPVbyte_nolen (req->sv1);
1229	}
1230	else
1231	{
1232	req->type = EIO_FSTAT;
1233	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1234	}
1235
1236	EIO_SEND;
1237	}
1238
1239	void
1240	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1241	PPCODE:
1242	{
1243	dREQ;
1244
1245	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1246	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1247	req->sv1 = newSVsv (fh_or_path);
1248
1249	if (SvPOK (fh_or_path))
1250	{
1251	req->type = EIO_UTIME;
1252	req->ptr1 = SvPVbyte_nolen (req->sv1);
1253	}
1254	else
1255	{
1256	req->type = EIO_FUTIME;
1257	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1258	}
1259
1260	EIO_SEND;
1261	}
1262
1263	void
1264	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1265	PPCODE:
1266	{
1267	dREQ;
1268
1269	req->sv1 = newSVsv (fh_or_path);
1270	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1271
1272	if (SvPOK (fh_or_path))
1273	{
1274	req->type = EIO_TRUNCATE;
1275	req->ptr1 = SvPVbyte_nolen (req->sv1);
1276	}
1277	else
1278	{
1279	req->type = EIO_FTRUNCATE;
1280	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1281	}
1282
1283	EIO_SEND;
1284	}
1285
1286	void
1287	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1288	ALIAS:
1289	aio_chmod = EIO_CHMOD
1290	aio_fchmod = EIO_FCHMOD
1291	aio_mkdir = EIO_MKDIR
1292	PPCODE:
1293	{
1294	dREQ;
1295
1296	req->type = type;
1297	req->int2 = mode;
1298	req->sv1 = newSVsv (fh_or_path);
1299
1300	if (ix == EIO_FCHMOD)
1301	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1302	else
1303	req->ptr1 = SvPVbyte_nolen (req->sv1);
1304
1305	EIO_SEND;
1306	}
1307
1308	void
1309	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1310	PPCODE:
1311	{
1312	dREQ;
1313
1314	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1315	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1316	req->sv1 = newSVsv (fh_or_path);
1317
1318	if (SvPOK (fh_or_path))
1319	{
1320	req->type = EIO_CHOWN;
1321	req->ptr1 = SvPVbyte_nolen (req->sv1);
1322	}
1323	else
1324	{
1325	req->type = EIO_FCHOWN;
1326	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1327	}
1328
1329	EIO_SEND;
1330	}
1331
1332	void
1333	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1334	ALIAS:
1335	aio_unlink = EIO_UNLINK
1336	aio_rmdir = EIO_RMDIR
1337	aio_readdir = EIO_READDIR
1338	PPCODE:
1339	{
1340	dREQ;
1341
1342	req->type = ix;
1343	req->sv1 = newSVsv (pathname);
1344	req->ptr1 = SvPVbyte_nolen (req->sv1);
1345
1346	EIO_SEND;
1347	}
1348
1349	void
1350	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1351	ALIAS:
1352	aio_link = EIO_LINK
1353	aio_symlink = EIO_SYMLINK
1354	aio_rename = EIO_RENAME
1355	PPCODE:
1356	{
1357	dREQ;
1358
1359	req->type = ix;
1360	req->sv1 = newSVsv (oldpath);
1361	req->ptr1 = SvPVbyte_nolen (req->sv1);
1362	req->sv2 = newSVsv (newpath);
1363	req->ptr2 = SvPVbyte_nolen (req->sv2);
1364
1365	EIO_SEND;
1366	}
1367
1368	void
1369	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1370	PPCODE:
1371	{
1372	dREQ;
1373
1374	req->type = EIO_MKNOD;
1375	req->sv1 = newSVsv (pathname);
1376	req->ptr1 = SvPVbyte_nolen (req->sv1);
1377	req->int2 = (mode_t)mode;
1378	req->offs = dev;
1379
1380	EIO_SEND;
1381	}
1382
1383	void
1384	aio_busy (double delay, SV *callback=&PL_sv_undef)
1385	PPCODE:
1386	{
1387	dREQ;
1388
1389	req->type = EIO_BUSY;
1390	req->nv1 = delay < 0. ? 0. : delay;
1391
1392	EIO_SEND;
1393	}
1394
1395	void
1396	aio_group (SV *callback=&PL_sv_undef)
1397	PROTOTYPE: ;$
1398	PPCODE:
1399	{
1400	dREQ;
1401
1402	req->type = EIO_GROUP;
1403
1404	req_send (req);
1405	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1406	}
1407
1408	void
1409	aio_nop (SV *callback=&PL_sv_undef)
1410	ALIAS:
1411	aio_nop = EIO_NOP
1412	aio_sync = EIO_SYNC
1413	PPCODE:
1414	{
1415	dREQ;
1416
1417	#endif	1397	#endif
		1398
		1399	eio_req *eio_grp (eio_cb cb, void *data)
		1400	{
		1401	const int pri = EIO_PRI_MAX;
		1402
		1403	REQ (EIO_GROUP); SEND;
		1404	}
		1405
		1406	#undef REQ
		1407	#undef PATH
		1408	#undef SEND
		1409
		1410	/*****************************************************************************/
		1411	/* grp functions */
1418		1412
1419	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	1413	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1420	{	1414	{
1421	grp->int2 = limit;	1415	grp->int2 = limit;
1422	grp->feed = feed;	1416	grp->feed = feed;
…		…
1445	grp->grp_first->grp_prev = req;	1439	grp->grp_first->grp_prev = req;
1446		1440
1447	grp->grp_first = req;	1441	grp->grp_first = req;
1448	}	1442	}
1449		1443
		1444	/*****************************************************************************/
		1445	/* misc garbage */
1450		1446
		1447	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		1448	{
		1449	etp_worker wrk;
		1450
		1451	wrk.dbuf = 0;
		1452
		1453	eio__sendfile (ofd, ifd, offset, count, &wrk);
		1454
		1455	if (wrk.dbuf)
		1456	free (wrk.dbuf);
		1457	}
		1458

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