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Comparing libeio/eio.c (file contents):
Revision 1.4 by root, Sun May 11 00:10:15 2008 UTC vs.
Revision 1.14 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	#include <stddef.h>	44	#include <stddef.h>
…		…
8	#include <errno.h>	47	#include <errno.h>
9	#include <sys/types.h>	48	#include <sys/types.h>
10	#include <sys/stat.h>	49	#include <sys/stat.h>
11	#include <limits.h>	50	#include <limits.h>
12	#include <fcntl.h>	51	#include <fcntl.h>
13	#include <sched.h>	52	#include <assert.h>
14		53
15	#ifndef EIO_FINISH	54	#ifndef EIO_FINISH
16	# 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
17	#endif	56	#endif
18		57
…		…
41	# ifndef EIO_STRUCT_DIRENT	80	# ifndef EIO_STRUCT_DIRENT
42	# define EIO_STRUCT_DIRENT struct dirent	81	# define EIO_STRUCT_DIRENT struct dirent
43	# endif	82	# endif
44		83
45	#endif	84	#endif
46
47	# ifndef EIO_STRUCT_STAT
48	# define EIO_STRUCT_STAT struct stat
49	# endif
50		85
51	#if HAVE_SENDFILE	86	#if HAVE_SENDFILE
52	# if __linux	87	# if __linux
53	# include <sys/sendfile.h>	88	# include <sys/sendfile.h>
54	# elif __freebsd	89	# elif __freebsd
…		…
74	/* buffer size for various temporary buffers */	109	/* buffer size for various temporary buffers */
75	#define EIO_BUFSIZE 65536	110	#define EIO_BUFSIZE 65536
76		111
77	#define dBUF \	112	#define dBUF \
78	char *eio_buf; \	113	char *eio_buf; \
79	X_LOCK (wrklock); \	114	ETP_WORKER_LOCK (self); \
80	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	115	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \
81	X_UNLOCK (wrklock); \	116	ETP_WORKER_UNLOCK (self); \
		117	errno = ENOMEM; \
82	if (!eio_buf) \	118	if (!eio_buf) \
83	return -1;	119	return -1;
84		120
85	#define EIO_TICKS ((1000000 + 1023) >> 10)	121	#define EIO_TICKS ((1000000 + 1023) >> 10)
86		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
87	static void (*want_poll_cb) (void);	162	static void (*want_poll_cb) (void);
88	static void (*done_poll_cb) (void);	163	static void (*done_poll_cb) (void);
89		164
90	static unsigned int max_poll_time = 0;	165	static unsigned int max_poll_time; /* reslock */
91	static unsigned int max_poll_reqs = 0;	166	static unsigned int max_poll_reqs; /* reslock */
92		167
93	/* calculcate time difference in ~1/EIO_TICKS of a second */	168	static volatile unsigned int nreqs; /* reqlock */
94	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	169	static volatile unsigned int nready; /* reqlock */
95	{	170	static volatile unsigned int npending; /* reqlock */
96	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	171	static volatile unsigned int max_idle = 4;
97	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
98	}
99		172
100	static unsigned int started, idle, wanted;
101
102	/* worker threads management */
103	static mutex_t wrklock = X_MUTEX_INIT;	173	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;	174	static mutex_t reslock = X_MUTEX_INIT;
146	static mutex_t reqlock = X_MUTEX_INIT;	175	static mutex_t reqlock = X_MUTEX_INIT;
147	static cond_t reqwait = X_COND_INIT;	176	static cond_t reqwait = X_COND_INIT;
148		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
149	unsigned int eio_nreqs (void)	211	static unsigned int etp_nreqs (void)
150	{	212	{
		213	int retval;
		214	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		215	retval = nreqs;
		216	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
151	return nreqs;	217	return retval;
152	}	218	}
153		219
154	unsigned int eio_nready (void)	220	static unsigned int etp_nready (void)
155	{	221	{
156	unsigned int retval;	222	unsigned int retval;
157		223
158	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	224	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
159	retval = nready;	225	retval = nready;
160	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	226	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
161		227
162	return retval;	228	return retval;
163	}	229	}
164		230
165	unsigned int eio_npending (void)	231	static unsigned int etp_npending (void)
166	{	232	{
167	unsigned int retval;	233	unsigned int retval;
168		234
169	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	235	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
170	retval = npending;	236	retval = npending;
171	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	237	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
172		238
173	return retval;	239	return retval;
174	}	240	}
175		241
176	unsigned int eio_nthreads (void)	242	static unsigned int etp_nthreads (void)
177	{	243	{
178	unsigned int retval;	244	unsigned int retval;
179		245
180	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	246	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
181	retval = started;	247	retval = started;
…		…
188	* a somewhat faster data structure might be nice, but	254	* a somewhat faster data structure might be nice, but
189	* with 8 priorities this actually needs <20 insns	255	* with 8 priorities this actually needs <20 insns
190	* per shift, the most expensive operation.	256	* per shift, the most expensive operation.
191	*/	257	*/
192	typedef struct {	258	typedef struct {
193	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 */
194	int size;	260	int size;
195	} reqq;	261	} etp_reqq;
196		262
197	static reqq req_queue;	263	static etp_reqq req_queue;
198	static reqq res_queue;	264	static etp_reqq res_queue;
199		265
200	static int reqq_push (reqq *q, eio_req *req)	266	static int reqq_push (etp_reqq *q, ETP_REQ *req)
201	{	267	{
202	int pri = req->pri;	268	int pri = req->pri;
203	req->next = 0;	269	req->next = 0;
204		270
205	if (q->qe[pri])	271	if (q->qe[pri])
…		…
211	q->qe[pri] = q->qs[pri] = req;	277	q->qe[pri] = q->qs[pri] = req;
212		278
213	return q->size++;	279	return q->size++;
214	}	280	}
215		281
216	static eio_req *reqq_shift (reqq *q)	282	static ETP_REQ *reqq_shift (etp_reqq *q)
217	{	283	{
218	int pri;	284	int pri;
219		285
220	if (!q->size)	286	if (!q->size)
221	return 0;	287	return 0;
222		288
223	--q->size;	289	--q->size;
224		290
225	for (pri = EIO_NUM_PRI; pri--; )	291	for (pri = ETP_NUM_PRI; pri--; )
226	{	292	{
227	eio_req *req = q->qs[pri];	293	eio_req *req = q->qs[pri];
228		294
229	if (req)	295	if (req)
230	{	296	{
…		…
236	}	302	}
237		303
238	abort ();	304	abort ();
239	}	305	}
240		306
241	static void grp_try_feed (eio_req *grp)	307	static void etp_atfork_prepare (void)
242	{	308	{
243	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)
244	{	344	{
245	int old_len = grp->size;	345	etp_worker *wrk = wrk_first.next;
246		346
247	EIO_FEED (grp);	347	if (wrk->req)
		348	ETP_DESTROY (wrk->req);
248		349
249	/* stop if no progress has been made */	350	etp_worker_clear (wrk);
250	if (old_len == grp->size)	351	etp_worker_free (wrk);
251	{
252	grp->feed = 0;
253	break;
254	}
255	}
256	}
257
258	static int eio_finish (eio_req *req);
259
260	static int grp_dec (eio_req *grp)
261	{
262	--grp->size;
263
264	/* call feeder, if applicable */
265	grp_try_feed (grp);
266
267	/* finish, if done */
268	if (!grp->size && grp->int1)
269	return eio_finish (grp);
270	else
271	return 0;
272	}
273
274	void eio_destroy (eio_req *req)
275	{
276	if ((req)->flags & EIO_FLAG_PTR2_FREE)
277	free (req->ptr2);
278
279	EIO_DESTROY (req);
280	}
281
282	static int eio_finish (eio_req *req)
283	{
284	int res = EIO_FINISH (req);
285
286	if (req->grp)
287	{	352	}
288	int res2;
289	eio_req *grp = req->grp;
290		353
291	/* unlink request */	354	started = 0;
292	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;	355	idle = 0;
293	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;	356	nreqs = 0;
		357	nready = 0;
		358	npending = 0;
294		359
295	if (grp->grp_first == req)	360	etp_atfork_parent ();
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	}	361	}
308		362
309	void eio_grp_cancel (eio_req *grp)	363	static void
310	{	364	etp_once_init (void)
311	for (grp = grp->grp_first; grp; grp = grp->grp_next)	365	{
312	eio_cancel (grp);	366	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
313	}	367	}
314		368
315	void eio_cancel (eio_req *req)	369	static int
		370	etp_init (void (*want_poll)(void), void (*done_poll)(void))
316	{	371	{
317	req->flags |= EIO_FLAG_CANCELLED;	372	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
318		373
319	eio_grp_cancel (req);	374	pthread_once (&doinit, etp_once_init);
320	}
321		375
		376	want_poll_cb = want_poll;
		377	done_poll_cb = done_poll;
		378	}
		379
322	X_THREAD_PROC (eio_proc);	380	X_THREAD_PROC (etp_proc);
323		381
324	static void start_thread (void)	382	static void etp_start_thread (void)
325	{	383	{
326	worker *wrk = calloc (1, sizeof (worker));	384	etp_worker *wrk = calloc (1, sizeof (etp_worker));
327		385
328	if (!wrk)	386	/*TODO*/
329	croak ("unable to allocate worker thread data");	387	assert (("unable to allocate worker thread data", wrk));
330		388
331	X_LOCK (wrklock);	389	X_LOCK (wrklock);
332		390
333	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	391	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
334	{	392	{
335	wrk->prev = &wrk_first;	393	wrk->prev = &wrk_first;
336	wrk->next = wrk_first.next;	394	wrk->next = wrk_first.next;
337	wrk_first.next->prev = wrk;	395	wrk_first.next->prev = wrk;
338	wrk_first.next = wrk;	396	wrk_first.next = wrk;
…		…
342	free (wrk);	400	free (wrk);
343		401
344	X_UNLOCK (wrklock);	402	X_UNLOCK (wrklock);
345	}	403	}
346		404
347	static void maybe_start_thread (void)	405	static void etp_maybe_start_thread (void)
348	{	406	{
349	if (eio_nthreads () >= wanted)	407	if (etp_nthreads () >= wanted)
350	return;	408	return;
351		409
352	/* todo: maybe use idle here, but might be less exact */	410	/* todo: maybe use idle here, but might be less exact */
353	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	411	if (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ())
354	return;	412	return;
355		413
356	start_thread ();	414	etp_start_thread ();
357	}	415	}
358		416
359	void eio_submit (eio_req *req)
360	{
361	++nreqs;
362
363	X_LOCK (reqlock);
364	++nready;
365	reqq_push (&req_queue, req);
366	X_COND_SIGNAL (reqwait);
367	X_UNLOCK (reqlock);
368
369	maybe_start_thread ();
370	}
371
372	static void end_thread (void)	417	static void etp_end_thread (void)
373	{	418	{
374	eio_req *req = calloc (1, sizeof (eio_req));	419	eio_req *req = calloc (1, sizeof (eio_req));
375		420
376	req->type = EIO_QUIT;	421	req->type = -1;
377	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	422	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
378		423
379	X_LOCK (reqlock);	424	X_LOCK (reqlock);
380	reqq_push (&req_queue, req);	425	reqq_push (&req_queue, req);
381	X_COND_SIGNAL (reqwait);	426	X_COND_SIGNAL (reqwait);
382	X_UNLOCK (reqlock);	427	X_UNLOCK (reqlock);
…		…
384	X_LOCK (wrklock);	429	X_LOCK (wrklock);
385	--started;	430	--started;
386	X_UNLOCK (wrklock);	431	X_UNLOCK (wrklock);
387	}	432	}
388		433
389	void eio_set_max_poll_time (double nseconds)
390	{
391	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
392	max_poll_time = nseconds;
393	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
394	}
395
396	void eio_set_max_poll_reqs (unsigned int maxreqs)
397	{
398	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
399	max_poll_reqs = maxreqs;
400	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
401	}
402
403	void eio_set_max_idle (unsigned int nthreads)
404	{
405	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
406	max_idle = nthreads <= 0 ? 1 : nthreads;
407	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
408	}
409
410	void eio_set_min_parallel (unsigned int nthreads)
411	{
412	if (wanted < nthreads)
413	wanted = nthreads;
414	}
415
416	void eio_set_max_parallel (unsigned int nthreads)
417	{
418	if (wanted > nthreads)
419	wanted = nthreads;
420
421	while (started > wanted)
422	end_thread ();
423	}
424
425	int eio_poll (void)	434	static int etp_poll (void)
426	{	435	{
427	int maxreqs = max_poll_reqs;	436	unsigned int maxreqs;
		437	unsigned int maxtime;
428	struct timeval tv_start, tv_now;	438	struct timeval tv_start, tv_now;
429	eio_req *req;
430		439
		440	X_LOCK (reslock);
		441	maxreqs = max_poll_reqs;
		442	maxtime = max_poll_time;
		443	X_UNLOCK (reslock);
		444
431	if (max_poll_time)	445	if (maxtime)
432	gettimeofday (&tv_start, 0);	446	gettimeofday (&tv_start, 0);
433		447
434	for (;;)	448	for (;;)
435	{	449	{
		450	ETP_REQ *req;
		451
436	maybe_start_thread ();	452	etp_maybe_start_thread ();
437		453
438	X_LOCK (reslock);	454	X_LOCK (reslock);
439	req = reqq_shift (&res_queue);	455	req = reqq_shift (&res_queue);
440		456
441	if (req)	457	if (req)
…		…
449	X_UNLOCK (reslock);	465	X_UNLOCK (reslock);
450		466
451	if (!req)	467	if (!req)
452	return 0;	468	return 0;
453		469
		470	X_LOCK (reqlock);
454	--nreqs;	471	--nreqs;
		472	X_UNLOCK (reqlock);
455		473
456	if (req->type == EIO_GROUP && req->size)	474	if (req->type == EIO_GROUP && req->size)
457	{	475	{
458	req->int1 = 1; /* mark request as delayed */	476	req->int1 = 1; /* mark request as delayed */
459	continue;	477	continue;
460	}	478	}
461	else	479	else
462	{	480	{
463	int res = eio_finish (req);	481	int res = ETP_FINISH (req);
464	if (res)	482	if (res)
465	return res;	483	return res;
466	}	484	}
467		485
468	if (maxreqs && !--maxreqs)	486	if (maxreqs && !--maxreqs)
469	break;	487	break;
470		488
471	if (max_poll_time)	489	if (maxtime)
472	{	490	{
473	gettimeofday (&tv_now, 0);	491	gettimeofday (&tv_now, 0);
474		492
475	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	493	if (tvdiff (&tv_start, &tv_now) >= maxtime)
476	break;	494	break;
477	}	495	}
478	}	496	}
479		497
480	errno = EAGAIN;	498	errno = EAGAIN;
481	return -1;	499	return -1;
482	}	500	}
483		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
484	/*****************************************************************************/	698	/*****************************************************************************/
485	/* work around various missing functions */	699	/* work around various missing functions */
486		700
487	#if !HAVE_PREADWRITE	701	#if !HAVE_PREADWRITE
488	# define pread aio_pread	702	# define pread eio__pread
489	# define pwrite aio_pwrite	703	# define pwrite eio__pwrite
490		704
491	/*	705	/*
492	* make our pread/pwrite safe against themselves, but not against	706	* make our pread/pwrite safe against themselves, but not against
493	* 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,
494	* but that's your problem, not mine.	708	* but that's your problem, not mine.
495	*/	709	*/
496	static mutex_t preadwritelock = X_MUTEX_INIT;	710	static mutex_t preadwritelock = X_MUTEX_INIT;
497		711
498	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)
499	{	714	{
500	ssize_t res;	715	ssize_t res;
501	off_t ooffset;	716	off_t ooffset;
502		717
503	X_LOCK (preadwritelock);	718	X_LOCK (preadwritelock);
…		…
508	X_UNLOCK (preadwritelock);	723	X_UNLOCK (preadwritelock);
509		724
510	return res;	725	return res;
511	}	726	}
512		727
513	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)
514	{	730	{
515	ssize_t res;	731	ssize_t res;
516	off_t ooffset;	732	off_t ooffset;
517		733
518	X_LOCK (preadwritelock);	734	X_LOCK (preadwritelock);
…		…
526	}	742	}
527	#endif	743	#endif
528		744
529	#ifndef HAVE_FUTIMES	745	#ifndef HAVE_FUTIMES
530		746
531	# define utimes(path,times) aio_utimes (path, times)	747	# define utimes(path,times) eio__utimes (path, times)
532	# define futimes(fd,times) aio_futimes (fd, times)	748	# define futimes(fd,times) eio__futimes (fd, times)
533		749
		750	static int
534	static int aio_utimes (const char *filename, const struct timeval times[2])	751	eio__utimes (const char *filename, const struct timeval times[2])
535	{	752	{
536	if (times)	753	if (times)
537	{	754	{
538	struct utimbuf buf;	755	struct utimbuf buf;
539		756
…		…
544	}	761	}
545	else	762	else
546	return utime (filename, 0);	763	return utime (filename, 0);
547	}	764	}
548		765
549	static int aio_futimes (int fd, const struct timeval tv[2])	766	static int eio__futimes (int fd, const struct timeval tv[2])
550	{	767	{
551	errno = ENOSYS;	768	errno = ENOSYS;
552	return -1;	769	return -1;
553	}	770	}
554		771
…		…
557	#if !HAVE_FDATASYNC	774	#if !HAVE_FDATASYNC
558	# define fdatasync fsync	775	# define fdatasync fsync
559	#endif	776	#endif
560		777
561	#if !HAVE_READAHEAD	778	#if !HAVE_READAHEAD
562	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	779	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
563		780
		781	static ssize_t
564	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)
565	{	783	{
566	size_t todo = count;	784	size_t todo = count;
567	dBUF;	785	dBUF;
568		786
569	while (todo > 0)	787	while (todo > 0)
…		…
580	}	798	}
581		799
582	#endif	800	#endif
583		801
584	#if !HAVE_READDIR_R	802	#if !HAVE_READDIR_R
585	# define readdir_r aio_readdir_r	803	# define readdir_r eio__readdir_r
586		804
587	static mutex_t readdirlock = X_MUTEX_INIT;	805	static mutex_t readdirlock = X_MUTEX_INIT;
588		806
589	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)
590	{	809	{
591	X_DIRENT *e;	810	EIO_STRUCT_DIRENT *e;
592	int errorno;	811	int errorno;
593		812
594	X_LOCK (readdirlock);	813	X_LOCK (readdirlock);
595		814
596	e = readdir (dirp);	815	e = readdir (dirp);
…		…
610	return e ? 0 : -1;	829	return e ? 0 : -1;
611	}	830	}
612	#endif	831	#endif
613		832
614	/* sendfile always needs emulation */	833	/* sendfile always needs emulation */
		834	static ssize_t
615	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)
616	{	836	{
617	ssize_t res;	837	ssize_t res;
618		838
619	if (!count)	839	if (!count)
620	return 0;	840	return 0;
…		…
703		923
704	return res;	924	return res;
705	}	925	}
706		926
707	/* read a full directory */	927	/* read a full directory */
		928	static void
708	static void scandir_ (eio_req *req, worker *self)	929	eio__scandir (eio_req *req, etp_worker *self)
709	{	930	{
710	DIR *dirp;	931	DIR *dirp;
711	union	932	union
712	{	933	{
713	EIO_STRUCT_DIRENT d;	934	EIO_STRUCT_DIRENT d;
…		…
765	req->result = res;	986	req->result = res;
766	}	987	}
767		988
768	/*****************************************************************************/	989	/*****************************************************************************/
769		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
770	X_THREAD_PROC (eio_proc)	1006	X_THREAD_PROC (etp_proc)
771	{	1007	{
772	eio_req *req;	1008	ETP_REQ *req;
773	struct timespec ts;	1009	struct timespec ts;
774	worker *self = (worker *)thr_arg;	1010	etp_worker *self = (etp_worker *)thr_arg;
775		1011
776	/* try to distribute timeouts somewhat randomly */	1012	/* try to distribute timeouts somewhat randomly */
777	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1013	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
778		1014
779	for (;;)	1015	for (;;)
780	{	1016	{
781	ts.tv_sec = time (0) + IDLE_TIMEOUT;
782
783	X_LOCK (reqlock);	1017	X_LOCK (reqlock);
784		1018
785	for (;;)	1019	for (;;)
786	{	1020	{
787	self->req = req = reqq_shift (&req_queue);	1021	self->req = req = reqq_shift (&req_queue);
…		…
789	if (req)	1023	if (req)
790	break;	1024	break;
791		1025
792	++idle;	1026	++idle;
793		1027
		1028	ts.tv_sec = time (0) + IDLE_TIMEOUT;
794	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1029	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
795	{	1030	{
796	if (idle > max_idle)	1031	if (idle > max_idle)
797	{	1032	{
798	--idle;	1033	--idle;
…		…
803	goto quit;	1038	goto quit;
804	}	1039	}
805		1040
806	/* we are allowed to idle, so do so without any timeout */	1041	/* we are allowed to idle, so do so without any timeout */
807	X_COND_WAIT (reqwait, reqlock);	1042	X_COND_WAIT (reqwait, reqlock);
808	ts.tv_sec = time (0) + IDLE_TIMEOUT;
809	}	1043	}
810		1044
811	--idle;	1045	--idle;
812	}	1046	}
813		1047
…		…
818	errno = 0; /* strictly unnecessary */	1052	errno = 0; /* strictly unnecessary */
819		1053
820	if (!EIO_CANCELLED (req))	1054	if (!EIO_CANCELLED (req))
821	switch (req->type)	1055	switch (req->type)
822	{	1056	{
		1057	case EIO_READ: ALLOC (req->size);
823	case EIO_READ: req->result = req->offs >= 0	1058	req->result = req->offs >= 0
824	? pread (req->int1, req->ptr2, req->size, req->offs)	1059	? pread (req->int1, req->ptr2, req->size, req->offs)
825	: read (req->int1, req->ptr2, req->size); break;	1060	: read (req->int1, req->ptr2, req->size); break;
826	case EIO_WRITE: req->result = req->offs >= 0	1061	case EIO_WRITE: req->result = req->offs >= 0
827	? pwrite (req->int1, req->ptr2, req->size, req->offs)	1062	? pwrite (req->int1, req->ptr2, req->size, req->offs)
828	: write (req->int1, req->ptr2, req->size); break;	1063	: write (req->int1, req->ptr2, req->size); break;
829		1064
830	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;
831	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;
832		1067
		1068	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
833	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));
834	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));
835	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;
836		1074
837	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;
838	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;
839	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;
840	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;
…		…
849	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;
850	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;	1088	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
851	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;	1089	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
852	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;	1090	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
853	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;	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);
854	case EIO_READLINK: req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;	1094	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
855		1095
856	case EIO_SYNC: req->result = 0; sync (); break;	1096	case EIO_SYNC: req->result = 0; sync (); break;
857	case EIO_FSYNC: req->result = fsync (req->int1); break;	1097	case EIO_FSYNC: req->result = fsync (req->int1); break;
858	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;	1098	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
859		1099
860	case EIO_READDIR: scandir_ (req, self); break;	1100	case EIO_READDIR: eio__scandir (req, self); break;
861		1101
862	case EIO_BUSY:	1102	case EIO_BUSY:
863	#ifdef _WIN32	1103	#ifdef _WIN32
864	Sleep (req->nv1 * 1000.);	1104	Sleep (req->nv1 * 1000.);
865	#else	1105	#else
…		…
898	: utimes (req->ptr1, times);	1138	: utimes (req->ptr1, times);
899	}	1139	}
900		1140
901	case EIO_GROUP:	1141	case EIO_GROUP:
902	case EIO_NOP:	1142	case EIO_NOP:
		1143	req->result = 0;
903	break;	1144	break;
904		1145
905	case EIO_QUIT:	1146	case -1:
906	goto quit;	1147	goto quit;
907		1148
908	default:	1149	default:
909	req->result = -1;	1150	req->result = -1;
910	break;	1151	break;
…		…
918		1159
919	if (!reqq_push (&res_queue, req) && want_poll_cb)	1160	if (!reqq_push (&res_queue, req) && want_poll_cb)
920	want_poll_cb ();	1161	want_poll_cb ();
921		1162
922	self->req = 0;	1163	self->req = 0;
923	worker_clear (self);	1164	etp_worker_clear (self);
924		1165
925	X_UNLOCK (reslock);	1166	X_UNLOCK (reslock);
926	}	1167	}
927		1168
928	quit:	1169	quit:
929	X_LOCK (wrklock);	1170	X_LOCK (wrklock);
930	worker_free (self);	1171	etp_worker_free (self);
931	X_UNLOCK (wrklock);	1172	X_UNLOCK (wrklock);
932		1173
933	return 0;	1174	return 0;
934	}	1175	}
935		1176
936	/*****************************************************************************/	1177	/*****************************************************************************/
937		1178
938	static void eio_atfork_prepare (void)	1179	int eio_init (void (*want_poll)(void), void (*done_poll)(void))
939	{	1180	{
940	X_LOCK (wrklock);	1181	etp_init (want_poll, done_poll);
941	X_LOCK (reqlock);
942	X_LOCK (reslock);
943	#if !HAVE_PREADWRITE
944	X_LOCK (preadwritelock);
945	#endif
946	#if !HAVE_READDIR_R
947	X_LOCK (readdirlock);
948	#endif
949	}	1182	}
950		1183
951	static void eio_atfork_parent (void)	1184	static void eio_api_destroy (eio_req *req)
952	{	1185	{
953	#if !HAVE_READDIR_R	1186	free (req);
954	X_UNLOCK (readdirlock);
955	#endif
956	#if !HAVE_PREADWRITE
957	X_UNLOCK (preadwritelock);
958	#endif
959	X_UNLOCK (reslock);
960	X_UNLOCK (reqlock);
961	X_UNLOCK (wrklock);
962	}	1187	}
963		1188
964	static void eio_atfork_child (void)	1189	#define REQ(rtype) \
965	{	1190	eio_req *req; \
966	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;
967		1201
968	while (prv = reqq_shift (&req_queue))	1202	#define SEND eio_submit (req); return req
969	eio_destroy (prv);
970		1203
971	while (prv = reqq_shift (&res_queue))	1204	#define PATH \
972	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	}
973		1212
974	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)
975	{	1374	{
976	worker *wrk = wrk_first.next;
977
978	if (wrk->req)
979	eio_destroy (wrk->req);	1375	eio_api_destroy (req);
980		1376	return 0;
981	worker_clear (wrk);
982	worker_free (wrk);
983	}	1377	}
984		1378
985	started = 0;	1379	SEND;
986	idle = 0;
987	nreqs = 0;
988	nready = 0;
989	npending = 0;
990
991	eio_atfork_parent ();
992	}	1380	}
993		1381
994	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)
995	{	1383	{
996	want_poll_cb = want_poll;	1384	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
997	done_poll_cb = done_poll;
998
999	#ifdef _WIN32
1000	X_MUTEX_CHECK (wrklock);
1001	X_MUTEX_CHECK (reslock);
1002	X_MUTEX_CHECK (reqlock);
1003	X_MUTEX_CHECK (reqwait);
1004	X_MUTEX_CHECK (preadwritelock);
1005	X_MUTEX_CHECK (readdirlock);
1006
1007	X_COND_CHECK (reqwait);
1008	#endif
1009
1010	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);
1011	}	1385	}
1012		1386
1013	#if 0	1387	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1014
1015	eio_req *eio_fsync (int fd, eio_cb cb);
1016	eio_req *eio_fdatasync (int fd, eio_cb cb);
1017	eio_req *eio_dupclose (int fd, eio_cb cb);
1018	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb);
1019	eio_req *eio_read (int fd, off_t offs, size_t length, char *data, eio_cb cb);
1020	eio_req *eio_write (int fd, off_t offs, size_t length, char *data, eio_cb cb);
1021	eio_req *eio_fstat (int fd, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */
1022	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb);
1023	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb);
1024	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb);
1025	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb);
1026	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb);
1027	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb);
1028	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb);
1029	eio_req *eio_readlink (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */
1030	eio_req *eio_stat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */
1031	eio_req *eio_lstat (const char *path, eio_cb cb); /* stat buffer=ptr2 allocates dynamically */
1032	eio_req *eio_utime (const char *path, double atime, double mtime, eio_cb cb);
1033	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb);
1034	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb);
1035	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb);
1036	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb);
1037	eio_req *eio_unlink (const char *path, eio_cb cb);
1038	eio_req *eio_rmdir (const char *path, eio_cb cb);
1039	eio_req *eio_readdir (const char *path, eio_cb cb); /* result=ptr2 allocated dynamically */
1040	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb);
1041	eio_req *eio_busy (double delay, eio_cb cb); /* ties a thread for this long, simulating busyness */
1042	eio_req *eio_nop (eio_cb cb); /* does nothing except go through the whole process */
1043	void
1044	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1045	PROTOTYPE: $$$;$
1046	PPCODE:
1047	{	1388	{
1048	dREQ;	1389	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
1049
1050	req->type = EIO_OPEN;
1051	req->sv1 = newSVsv (pathname);
1052	req->ptr1 = SvPVbyte_nolen (req->sv1);
1053	req->int1 = flags;
1054	req->int2 = mode;
1055
1056	EIO_SEND;
1057	}	1390	}
1058		1391
1059	void	1392	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1060	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1061	PROTOTYPE: $;$
1062	ALIAS:
1063	aio_fsync = EIO_FSYNC
1064	aio_fdatasync = EIO_FDATASYNC
1065	PPCODE:
1066	{	1393	{
1067	dREQ;	1394	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
1068
1069	req->type = ix;
1070	req->sv1 = newSVsv (fh);
1071	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1072
1073	EIO_SEND (req);
1074	}	1395	}
1075		1396
1076	void
1077	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1078	PROTOTYPE: $;$
1079	PPCODE:
1080	{
1081	dREQ;
1082
1083	req->type = EIO_CLOSE;
1084	req->sv1 = newSVsv (fh);
1085	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1086
1087	EIO_SEND (req);
1088	}
1089
1090	void
1091	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1092	ALIAS:
1093	aio_read = EIO_READ
1094	aio_write = EIO_WRITE
1095	PROTOTYPE: $$$$$;$
1096	PPCODE:
1097	{
1098	STRLEN svlen;
1099	char *svptr = SvPVbyte (data, svlen);
1100	UV len = SvUV (length);
1101
1102	SvUPGRADE (data, SVt_PV);
1103	SvPOK_on (data);
1104
1105	if (dataoffset < 0)
1106	dataoffset += svlen;
1107
1108	if (dataoffset < 0 || dataoffset > svlen)
1109	croak ("dataoffset outside of data scalar");
1110
1111	if (ix == EIO_WRITE)
1112	{
1113	/* write: check length and adjust. */
1114	if (!SvOK (length) || len + dataoffset > svlen)
1115	len = svlen - dataoffset;
1116	}
1117	else
1118	{
1119	/* read: grow scalar as necessary */
1120	svptr = SvGROW (data, len + dataoffset + 1);
1121	}
1122
1123	if (len < 0)
1124	croak ("length must not be negative");
1125
1126	{
1127	dREQ;
1128
1129	req->type = ix;
1130	req->sv1 = newSVsv (fh);
1131	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1132	: IoOFP (sv_2io (fh)));
1133	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1134	req->size = len;
1135	req->sv2 = SvREFCNT_inc (data);
1136	req->ptr2 = (char *)svptr + dataoffset;
1137	req->stroffset = dataoffset;
1138
1139	if (!SvREADONLY (data))
1140	{
1141	SvREADONLY_on (data);
1142	req->flags |= FLAG_SV2_RO_OFF;
1143	}
1144
1145	EIO_SEND;
1146	}
1147	}
1148
1149	void
1150	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1151	PROTOTYPE: $$;$
1152	PPCODE:
1153	{
1154	SV *data;
1155	dREQ;
1156
1157	data = newSV (NAME_MAX);
1158	SvPOK_on (data);
1159
1160	req->type = EIO_READLINK;
1161	req->sv1 = newSVsv (path);
1162	req->ptr1 = SvPVbyte_nolen (req->sv1);
1163	req->sv2 = data;
1164	req->ptr2 = SvPVbyte_nolen (data);
1165
1166	EIO_SEND;
1167	}
1168
1169	void
1170	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1171	PROTOTYPE: $$$$;$
1172	PPCODE:
1173	{
1174	dREQ;
1175
1176	req->type = EIO_SENDFILE;
1177	req->sv1 = newSVsv (out_fh);
1178	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1179	req->sv2 = newSVsv (in_fh);
1180	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1181	req->offs = SvVAL64 (in_offset);
1182	req->size = length;
1183
1184	EIO_SEND;
1185	}
1186
1187	void
1188	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1189	PROTOTYPE: $$$;$
1190	PPCODE:
1191	{
1192	dREQ;
1193
1194	req->type = EIO_READAHEAD;
1195	req->sv1 = newSVsv (fh);
1196	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1197	req->offs = SvVAL64 (offset);
1198	req->size = length;
1199
1200	EIO_SEND;
1201	}
1202
1203	void
1204	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1205	ALIAS:
1206	aio_stat = EIO_STAT
1207	aio_lstat = EIO_LSTAT
1208	PPCODE:
1209	{
1210	dREQ;
1211
1212	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1213	if (!req->ptr2)
1214	{
1215	req_destroy (req);
1216	croak ("out of memory during aio_stat statdata allocation");
1217	}
1218
1219	req->flags |= FLAG_PTR2_FREE;
1220	req->sv1 = newSVsv (fh_or_path);
1221
1222	if (SvPOK (fh_or_path))
1223	{
1224	req->type = ix;
1225	req->ptr1 = SvPVbyte_nolen (req->sv1);
1226	}
1227	else
1228	{
1229	req->type = EIO_FSTAT;
1230	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1231	}
1232
1233	EIO_SEND;
1234	}
1235
1236	void
1237	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1238	PPCODE:
1239	{
1240	dREQ;
1241
1242	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1243	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1244	req->sv1 = newSVsv (fh_or_path);
1245
1246	if (SvPOK (fh_or_path))
1247	{
1248	req->type = EIO_UTIME;
1249	req->ptr1 = SvPVbyte_nolen (req->sv1);
1250	}
1251	else
1252	{
1253	req->type = EIO_FUTIME;
1254	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1255	}
1256
1257	EIO_SEND;
1258	}
1259
1260	void
1261	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1262	PPCODE:
1263	{
1264	dREQ;
1265
1266	req->sv1 = newSVsv (fh_or_path);
1267	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1268
1269	if (SvPOK (fh_or_path))
1270	{
1271	req->type = EIO_TRUNCATE;
1272	req->ptr1 = SvPVbyte_nolen (req->sv1);
1273	}
1274	else
1275	{
1276	req->type = EIO_FTRUNCATE;
1277	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1278	}
1279
1280	EIO_SEND;
1281	}
1282
1283	void
1284	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1285	ALIAS:
1286	aio_chmod = EIO_CHMOD
1287	aio_fchmod = EIO_FCHMOD
1288	aio_mkdir = EIO_MKDIR
1289	PPCODE:
1290	{
1291	dREQ;
1292
1293	req->type = type;
1294	req->int2 = mode;
1295	req->sv1 = newSVsv (fh_or_path);
1296
1297	if (ix == EIO_FCHMOD)
1298	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1299	else
1300	req->ptr1 = SvPVbyte_nolen (req->sv1);
1301
1302	EIO_SEND;
1303	}
1304
1305	void
1306	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1307	PPCODE:
1308	{
1309	dREQ;
1310
1311	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1312	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1313	req->sv1 = newSVsv (fh_or_path);
1314
1315	if (SvPOK (fh_or_path))
1316	{
1317	req->type = EIO_CHOWN;
1318	req->ptr1 = SvPVbyte_nolen (req->sv1);
1319	}
1320	else
1321	{
1322	req->type = EIO_FCHOWN;
1323	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1324	}
1325
1326	EIO_SEND;
1327	}
1328
1329	void
1330	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1331	ALIAS:
1332	aio_unlink = EIO_UNLINK
1333	aio_rmdir = EIO_RMDIR
1334	aio_readdir = EIO_READDIR
1335	PPCODE:
1336	{
1337	dREQ;
1338
1339	req->type = ix;
1340	req->sv1 = newSVsv (pathname);
1341	req->ptr1 = SvPVbyte_nolen (req->sv1);
1342
1343	EIO_SEND;
1344	}
1345
1346	void
1347	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1348	ALIAS:
1349	aio_link = EIO_LINK
1350	aio_symlink = EIO_SYMLINK
1351	aio_rename = EIO_RENAME
1352	PPCODE:
1353	{
1354	dREQ;
1355
1356	req->type = ix;
1357	req->sv1 = newSVsv (oldpath);
1358	req->ptr1 = SvPVbyte_nolen (req->sv1);
1359	req->sv2 = newSVsv (newpath);
1360	req->ptr2 = SvPVbyte_nolen (req->sv2);
1361
1362	EIO_SEND;
1363	}
1364
1365	void
1366	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1367	PPCODE:
1368	{
1369	dREQ;
1370
1371	req->type = EIO_MKNOD;
1372	req->sv1 = newSVsv (pathname);
1373	req->ptr1 = SvPVbyte_nolen (req->sv1);
1374	req->int2 = (mode_t)mode;
1375	req->offs = dev;
1376
1377	EIO_SEND;
1378	}
1379
1380	void
1381	aio_busy (double delay, SV *callback=&PL_sv_undef)
1382	PPCODE:
1383	{
1384	dREQ;
1385
1386	req->type = EIO_BUSY;
1387	req->nv1 = delay < 0. ? 0. : delay;
1388
1389	EIO_SEND;
1390	}
1391
1392	void
1393	aio_group (SV *callback=&PL_sv_undef)
1394	PROTOTYPE: ;$
1395	PPCODE:
1396	{
1397	dREQ;
1398
1399	req->type = EIO_GROUP;
1400
1401	req_send (req);
1402	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1403	}
1404
1405	void
1406	aio_nop (SV *callback=&PL_sv_undef)
1407	ALIAS:
1408	aio_nop = EIO_NOP
1409	aio_sync = EIO_SYNC
1410	PPCODE:
1411	{
1412	dREQ;
1413
1414	#endif	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 */
1415		1412
1416	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)
1417	{	1414	{
1418	grp->int2 = limit;	1415	grp->int2 = limit;
1419	grp->feed = feed;	1416	grp->feed = feed;
…		…
1442	grp->grp_first->grp_prev = req;	1439	grp->grp_first->grp_prev = req;
1443		1440
1444	grp->grp_first = req;	1441	grp->grp_first = req;
1445	}	1442	}
1446		1443
		1444	/*****************************************************************************/
		1445	/* misc garbage */
1447		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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