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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 1.19 by root, Tue Jun 17 23:34:20 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	struct etp_worker;
		129
		130	#define ETP_REQ eio_req
		131	#define ETP_DESTROY(req) eio_destroy (req)
		132	static int eio_finish (eio_req *req);
		133	#define ETP_FINISH(req) eio_finish (req)
		134	static void eio_execute (struct etp_worker *self, eio_req *req);
		135	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		136
		137	#define ETP_WORKER_CLEAR(req) \
		138	if (wrk->dbuf) \
		139	{ \
		140	free (wrk->dbuf); \
		141	wrk->dbuf = 0; \
		142	} \
		143	\
		144	if (wrk->dirp) \
		145	{ \
		146	closedir (wrk->dirp); \
		147	wrk->dirp = 0; \
		148	}
		149	#define ETP_WORKER_COMMON \
		150	void *dbuf; \
		151	DIR *dirp;
		152
		153	/*****************************************************************************/
		154
		155	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		156
		157	/* calculcate time difference in ~1/EIO_TICKS of a second */
		158	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		159	{
		160	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		161	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		162	}
		163
		164	static unsigned int started, idle, wanted = 4;
		165
90	static void (*want_poll_cb) (void);	166	static void (*want_poll_cb) (void);
91	static void (*done_poll_cb) (void);	167	static void (*done_poll_cb) (void);
92		168
93	static unsigned int max_poll_time = 0;	169	static unsigned int max_poll_time; /* reslock */
94	static unsigned int max_poll_reqs = 0;	170	static unsigned int max_poll_reqs; /* reslock */
95		171
96	/* calculcate time difference in ~1/EIO_TICKS of a second */	172	static volatile unsigned int nreqs; /* reqlock */
97	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	173	static volatile unsigned int nready; /* reqlock */
98	{	174	static volatile unsigned int npending; /* reqlock */
99	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	175	static volatile unsigned int max_idle = 4;
100	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
101	}
102		176
103	static unsigned int started, idle, wanted;
104
105	/* worker threads management */
106	static mutex_t wrklock = X_MUTEX_INIT;	177	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;	178	static mutex_t reslock = X_MUTEX_INIT;
149	static mutex_t reqlock = X_MUTEX_INIT;	179	static mutex_t reqlock = X_MUTEX_INIT;
150	static cond_t reqwait = X_COND_INIT;	180	static cond_t reqwait = X_COND_INIT;
151		181
		182	typedef struct etp_worker
		183	{
		184	/* locked by wrklock */
		185	struct etp_worker *prev, *next;
		186
		187	thread_t tid;
		188
		189	/* locked by reslock, reqlock or wrklock */
		190	ETP_REQ *req; /* currently processed request */
		191
		192	ETP_WORKER_COMMON
		193	} etp_worker;
		194
		195	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
		196
		197	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		198	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
		199
		200	/* worker threads management */
		201
		202	static void etp_worker_clear (etp_worker *wrk)
		203	{
		204	ETP_WORKER_CLEAR (wrk);
		205	}
		206
		207	static void etp_worker_free (etp_worker *wrk)
		208	{
		209	wrk->next->prev = wrk->prev;
		210	wrk->prev->next = wrk->next;
		211
		212	free (wrk);
		213	}
		214
152	unsigned int eio_nreqs (void)	215	static unsigned int etp_nreqs (void)
153	{	216	{
		217	int retval;
		218	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		219	retval = nreqs;
		220	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
154	return nreqs;	221	return retval;
155	}	222	}
156		223
157	unsigned int eio_nready (void)	224	static unsigned int etp_nready (void)
158	{	225	{
159	unsigned int retval;	226	unsigned int retval;
160		227
161	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	228	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
162	retval = nready;	229	retval = nready;
163	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	230	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
164		231
165	return retval;	232	return retval;
166	}	233	}
167		234
168	unsigned int eio_npending (void)	235	static unsigned int etp_npending (void)
169	{	236	{
170	unsigned int retval;	237	unsigned int retval;
171		238
172	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	239	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
173	retval = npending;	240	retval = npending;
174	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	241	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
175		242
176	return retval;	243	return retval;
177	}	244	}
178		245
179	unsigned int eio_nthreads (void)	246	static unsigned int etp_nthreads (void)
180	{	247	{
181	unsigned int retval;	248	unsigned int retval;
182		249
183	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	250	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
184	retval = started;	251	retval = started;
…		…
191	* a somewhat faster data structure might be nice, but	258	* a somewhat faster data structure might be nice, but
192	* with 8 priorities this actually needs <20 insns	259	* with 8 priorities this actually needs <20 insns
193	* per shift, the most expensive operation.	260	* per shift, the most expensive operation.
194	*/	261	*/
195	typedef struct {	262	typedef struct {
196	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	263	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
197	int size;	264	int size;
198	} reqq;	265	} etp_reqq;
199		266
200	static reqq req_queue;	267	static etp_reqq req_queue;
201	static reqq res_queue;	268	static etp_reqq res_queue;
202		269
203	static int reqq_push (reqq *q, eio_req *req)	270	static int reqq_push (etp_reqq *q, ETP_REQ *req)
204	{	271	{
205	int pri = req->pri;	272	int pri = req->pri;
206	req->next = 0;	273	req->next = 0;
207		274
208	if (q->qe[pri])	275	if (q->qe[pri])
…		…
214	q->qe[pri] = q->qs[pri] = req;	281	q->qe[pri] = q->qs[pri] = req;
215		282
216	return q->size++;	283	return q->size++;
217	}	284	}
218		285
219	static eio_req *reqq_shift (reqq *q)	286	static ETP_REQ *reqq_shift (etp_reqq *q)
220	{	287	{
221	int pri;	288	int pri;
222		289
223	if (!q->size)	290	if (!q->size)
224	return 0;	291	return 0;
225		292
226	--q->size;	293	--q->size;
227		294
228	for (pri = EIO_NUM_PRI; pri--; )	295	for (pri = ETP_NUM_PRI; pri--; )
229	{	296	{
230	eio_req *req = q->qs[pri];	297	eio_req *req = q->qs[pri];
231		298
232	if (req)	299	if (req)
233	{	300	{
…		…
239	}	306	}
240		307
241	abort ();	308	abort ();
242	}	309	}
243		310
244	static void grp_try_feed (eio_req *grp)	311	static void etp_atfork_prepare (void)
245	{	312	{
246	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	313	X_LOCK (wrklock);
		314	X_LOCK (reqlock);
		315	X_LOCK (reslock);
		316	#if !HAVE_PREADWRITE
		317	X_LOCK (preadwritelock);
		318	#endif
		319	}
		320
		321	static void etp_atfork_parent (void)
		322	{
		323	#if !HAVE_PREADWRITE
		324	X_UNLOCK (preadwritelock);
		325	#endif
		326	X_UNLOCK (reslock);
		327	X_UNLOCK (reqlock);
		328	X_UNLOCK (wrklock);
		329	}
		330
		331	static void etp_atfork_child (void)
		332	{
		333	ETP_REQ *prv;
		334
		335	while (prv = reqq_shift (&req_queue))
		336	ETP_DESTROY (prv);
		337
		338	while (prv = reqq_shift (&res_queue))
		339	ETP_DESTROY (prv);
		340
		341	while (wrk_first.next != &wrk_first)
247	{	342	{
248	int old_len = grp->size;	343	etp_worker *wrk = wrk_first.next;
249		344
250	EIO_FEED (grp);	345	if (wrk->req)
		346	ETP_DESTROY (wrk->req);
251		347
252	/* stop if no progress has been made */	348	etp_worker_clear (wrk);
253	if (old_len == grp->size)	349	etp_worker_free (wrk);
254	{
255	grp->feed = 0;
256	break;
257	}
258	}	350	}
259	}
260		351
261	static int eio_finish (eio_req *req);	352	started = 0;
		353	idle = 0;
		354	nreqs = 0;
		355	nready = 0;
		356	npending = 0;
262		357
263	static int grp_dec (eio_req *grp)	358	etp_atfork_parent ();
264	{	359	}
265	--grp->size;
266		360
267	/* call feeder, if applicable */	361	static void
268	grp_try_feed (grp);	362	etp_once_init (void)
		363	{
		364	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
		365	}
269		366
270	/* finish, if done */	367	static int
271	if (!grp->size && grp->int1)	368	etp_init (void (*want_poll)(void), void (*done_poll)(void))
272	return eio_finish (grp);	369	{
273	else	370	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
		371
		372	pthread_once (&doinit, etp_once_init);
		373
		374	want_poll_cb = want_poll;
		375	done_poll_cb = done_poll;
		376
274	return 0;	377	return 0;
275	}	378	}
276		379
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	{
291	int res2;
292	eio_req *grp = req->grp;
293
294	/* unlink request */
295	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
296	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
297
298	if (grp->grp_first == req)
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	}
311
312	void eio_grp_cancel (eio_req *grp)
313	{
314	for (grp = grp->grp_first; grp; grp = grp->grp_next)
315	eio_cancel (grp);
316	}
317
318	void eio_cancel (eio_req *req)
319	{
320	req->flags |= EIO_FLAG_CANCELLED;
321
322	eio_grp_cancel (req);
323	}
324
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, etp_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;
582	return count;	797	return count;
583	}	798	}
584		799
585	#endif	800	#endif
586		801
587	#if !HAVE_READDIR_R
588	# define readdir_r aio_readdir_r
589
590	static mutex_t readdirlock = X_MUTEX_INIT;
591
592	static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)
593	{
594	X_DIRENT *e;
595	int errorno;
596
597	X_LOCK (readdirlock);
598
599	e = readdir (dirp);
600	errorno = errno;
601
602	if (e)
603	{
604	*res = ent;
605	strcpy (ent->d_name, e->d_name);
606	}
607	else
608	*res = 0;
609
610	X_UNLOCK (readdirlock);
611
612	errno = errorno;
613	return e ? 0 : -1;
614	}
615	#endif
616
617	/* sendfile always needs emulation */	802	/* sendfile always needs emulation */
		803	static ssize_t
618	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	804	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
619	{	805	{
620	ssize_t res;	806	ssize_t res;
621		807
622	if (!count)	808	if (!count)
623	return 0;	809	return 0;
…		…
706		892
707	return res;	893	return res;
708	}	894	}
709		895
710	/* read a full directory */	896	/* read a full directory */
		897	static void
711	static void scandir_ (eio_req *req, worker *self)	898	eio__scandir (eio_req *req, etp_worker *self)
712	{	899	{
713	DIR *dirp;	900	DIR *dirp;
714	union
715	{
716	EIO_STRUCT_DIRENT d;
717	char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1];
718	} *u;
719	EIO_STRUCT_DIRENT *entp;	901	EIO_STRUCT_DIRENT *entp;
720	char *name, *names;	902	char *name, *names;
721	int memlen = 4096;	903	int memlen = 4096;
722	int memofs = 0;	904	int memofs = 0;
723	int res = 0;	905	int res = 0;
724		906
725	X_LOCK (wrklock);	907	X_LOCK (wrklock);
726	self->dirp = dirp = opendir (req->ptr1);	908	self->dirp = dirp = opendir (req->ptr1);
727	self->dbuf = u = malloc (sizeof (*u));
728	req->flags |= EIO_FLAG_PTR2_FREE;	909	req->flags |= EIO_FLAG_PTR2_FREE;
729	req->ptr2 = names = malloc (memlen);	910	req->ptr2 = names = malloc (memlen);
730	X_UNLOCK (wrklock);	911	X_UNLOCK (wrklock);
731		912
732	if (dirp && u && names)	913	if (dirp && names)
733	for (;;)	914	for (;;)
734	{	915	{
735	errno = 0;	916	errno = 0;
736	readdir_r (dirp, &u->d, &entp);	917	entp = readdir (dirp);
737		918
738	if (!entp)	919	if (!entp)
739	break;	920	break;
740		921
741	name = entp->d_name;	922	name = entp->d_name;
…		…
768	req->result = res;	949	req->result = res;
769	}	950	}
770		951
771	/*****************************************************************************/	952	/*****************************************************************************/
772		953
		954	#define ALLOC(len) \
		955	if (!req->ptr2) \
		956	{ \
		957	X_LOCK (wrklock); \
		958	req->flags |= EIO_FLAG_PTR2_FREE; \
		959	X_UNLOCK (wrklock); \
		960	req->ptr2 = malloc (len); \
		961	if (!req->ptr2) \
		962	{ \
		963	errno = ENOMEM; \
		964	req->result = -1; \
		965	break; \
		966	} \
		967	}
		968
773	X_THREAD_PROC (eio_proc)	969	X_THREAD_PROC (etp_proc)
774	{	970	{
775	eio_req *req;	971	ETP_REQ *req;
776	struct timespec ts;	972	struct timespec ts;
777	worker *self = (worker *)thr_arg;	973	etp_worker *self = (etp_worker *)thr_arg;
778		974
779	/* try to distribute timeouts somewhat randomly */	975	/* try to distribute timeouts somewhat randomly */
780	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	976	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
781		977
782	for (;;)	978	for (;;)
783	{	979	{
784	ts.tv_sec = time (0) + IDLE_TIMEOUT;
785
786	X_LOCK (reqlock);	980	X_LOCK (reqlock);
787		981
788	for (;;)	982	for (;;)
789	{	983	{
790	self->req = req = reqq_shift (&req_queue);	984	self->req = req = reqq_shift (&req_queue);
…		…
792	if (req)	986	if (req)
793	break;	987	break;
794		988
795	++idle;	989	++idle;
796		990
		991	ts.tv_sec = time (0) + IDLE_TIMEOUT;
797	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	992	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
798	{	993	{
799	if (idle > max_idle)	994	if (idle > max_idle)
800	{	995	{
801	--idle;	996	--idle;
…		…
806	goto quit;	1001	goto quit;
807	}	1002	}
808		1003
809	/* we are allowed to idle, so do so without any timeout */	1004	/* we are allowed to idle, so do so without any timeout */
810	X_COND_WAIT (reqwait, reqlock);	1005	X_COND_WAIT (reqwait, reqlock);
811	ts.tv_sec = time (0) + IDLE_TIMEOUT;
812	}	1006	}
813		1007
814	--idle;	1008	--idle;
815	}	1009	}
816		1010
817	--nready;	1011	--nready;
818		1012
819	X_UNLOCK (reqlock);	1013	X_UNLOCK (reqlock);
820		1014
821	errno = 0; /* strictly unnecessary */	1015	if (req->type < 0)
		1016	goto quit;
822		1017
823	if (!EIO_CANCELLED (req))	1018	if (!EIO_CANCELLED (req))
824	switch (req->type)	1019	ETP_EXECUTE (self, req);
825	{
826	case EIO_READ: req->result = req->offs >= 0
827	? pread (req->int1, req->ptr2, req->size, req->offs)
828	: read (req->int1, req->ptr2, req->size); break;
829	case EIO_WRITE: req->result = req->offs >= 0
830	? pwrite (req->int1, req->ptr2, req->size, req->offs)
831	: write (req->int1, req->ptr2, req->size); break;
832
833	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;
835
836	case EIO_STAT: req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
837	case EIO_LSTAT: req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
838	case EIO_FSTAT: req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
839
840	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;
842	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;
844	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
845	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
846
847	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
848	case EIO_CLOSE: req->result = close (req->int1); break;
849	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
850	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
851	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
852	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;
854	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
855	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;
857	case EIO_READLINK: req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
858
859	case EIO_SYNC: req->result = 0; sync (); break;
860	case EIO_FSYNC: req->result = fsync (req->int1); break;
861	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
862
863	case EIO_READDIR: scandir_ (req, self); break;
864
865	case EIO_BUSY:
866	#ifdef _WIN32
867	Sleep (req->nv1 * 1000.);
868	#else
869	{
870	struct timeval tv;
871
872	tv.tv_sec = req->nv1;
873	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
874
875	req->result = select (0, 0, 0, 0, &tv);
876	}
877	#endif
878	break;
879
880	case EIO_UTIME:
881	case EIO_FUTIME:
882	{
883	struct timeval tv[2];
884	struct timeval *times;
885
886	if (req->nv1 != -1. || req->nv2 != -1.)
887	{
888	tv[0].tv_sec = req->nv1;
889	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
890	tv[1].tv_sec = req->nv2;
891	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
892
893	times = tv;
894	}
895	else
896	times = 0;
897
898
899	req->result = req->type == EIO_FUTIME
900	? futimes (req->int1, times)
901	: utimes (req->ptr1, times);
902	}
903
904	case EIO_GROUP:
905	case EIO_NOP:
906	break;
907
908	case EIO_QUIT:
909	goto quit;
910
911	default:
912	req->result = -1;
913	break;
914	}
915
916	req->errorno = errno;
917		1020
918	X_LOCK (reslock);	1021	X_LOCK (reslock);
919		1022
920	++npending;	1023	++npending;
921		1024
922	if (!reqq_push (&res_queue, req) && want_poll_cb)	1025	if (!reqq_push (&res_queue, req) && want_poll_cb)
923	want_poll_cb ();	1026	want_poll_cb ();
924		1027
925	self->req = 0;	1028	self->req = 0;
926	worker_clear (self);	1029	etp_worker_clear (self);
927		1030
928	X_UNLOCK (reslock);	1031	X_UNLOCK (reslock);
929	}	1032	}
930		1033
931	quit:	1034	quit:
932	X_LOCK (wrklock);	1035	X_LOCK (wrklock);
933	worker_free (self);	1036	etp_worker_free (self);
934	X_UNLOCK (wrklock);	1037	X_UNLOCK (wrklock);
935		1038
936	return 0;	1039	return 0;
937	}	1040	}
938		1041
939	/*****************************************************************************/	1042	/*****************************************************************************/
940		1043
941	static void eio_atfork_prepare (void)	1044	int eio_init (void (*want_poll)(void), void (*done_poll)(void))
942	{	1045	{
943	X_LOCK (wrklock);	1046	return 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	}	1047	}
953		1048
954	static void eio_atfork_parent (void)	1049	static void eio_api_destroy (eio_req *req)
955	{	1050	{
956	#if !HAVE_READDIR_R	1051	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	}	1052	}
966		1053
967	static void eio_atfork_child (void)	1054	#define REQ(rtype) \
968	{	1055	eio_req *req; \
969	eio_req *prv;	1056	\
		1057	req = (eio_req *)calloc (1, sizeof *req); \
		1058	if (!req) \
		1059	return 0; \
		1060	\
		1061	req->type = rtype; \
		1062	req->pri = pri; \
		1063	req->finish = cb; \
		1064	req->data = data; \
		1065	req->destroy = eio_api_destroy;
970		1066
971	while (prv = reqq_shift (&req_queue))	1067	#define SEND eio_submit (req); return req
972	eio_destroy (prv);
973		1068
974	while (prv = reqq_shift (&res_queue))	1069	#define PATH \
975	eio_destroy (prv);	1070	req->flags |= EIO_FLAG_PTR1_FREE; \
		1071	req->ptr1 = strdup (path); \
		1072	if (!req->ptr1) \
		1073	{ \
		1074	eio_api_destroy (req); \
		1075	return 0; \
		1076	}
976		1077
977	while (wrk_first.next != &wrk_first)	1078	static void eio_execute (etp_worker *self, eio_req *req)
		1079	{
		1080	errno = 0;
		1081
		1082	switch (req->type)
978	{	1083	{
979	worker *wrk = wrk_first.next;	1084	case EIO_READ: ALLOC (req->size);
		1085	req->result = req->offs >= 0
		1086	? pread (req->int1, req->ptr2, req->size, req->offs)
		1087	: read (req->int1, req->ptr2, req->size); break;
		1088	case EIO_WRITE: req->result = req->offs >= 0
		1089	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		1090	: write (req->int1, req->ptr2, req->size); break;
980		1091
981	if (wrk->req)	1092	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
982	eio_destroy (wrk->req);	1093	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
983		1094
984	worker_clear (wrk);	1095	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
985	worker_free (wrk);	1096	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
986	}	1097	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1098	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1099	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1100	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
987		1101
988	started = 0;	1102	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
989	idle = 0;	1103	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
990	nreqs = 0;	1104	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
991	nready = 0;	1105	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
992	npending = 0;	1106	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1107	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
993		1108
994	eio_atfork_parent ();	1109	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
995	}	1110	case EIO_CLOSE: req->result = close (req->int1); break;
		1111	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		1112	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		1113	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		1114	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		1115	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		1116	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		1117	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		1118	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->int3); break;
996		1119
997	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1120	case EIO_READLINK: ALLOC (NAME_MAX);
998	{	1121	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
999	want_poll_cb = want_poll;
1000	done_poll_cb = done_poll;
1001		1122
		1123	case EIO_SYNC: req->result = 0; sync (); break;
		1124	case EIO_FSYNC: req->result = fsync (req->int1); break;
		1125	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		1126
		1127	case EIO_READDIR: eio__scandir (req, self); break;
		1128
		1129	case EIO_BUSY:
1002	#ifdef _WIN32	1130	#ifdef _WIN32
1003	X_MUTEX_CHECK (wrklock);	1131	Sleep (req->nv1 * 1000.);
1004	X_MUTEX_CHECK (reslock);	1132	#else
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	}
1015
1016	#if 0
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: $$$;$
1049	PPCODE:
1050	{
1051	dREQ;
1052
1053	req->type = EIO_OPEN;
1054	req->sv1 = newSVsv (pathname);
1055	req->ptr1 = SvPVbyte_nolen (req->sv1);
1056	req->int1 = flags;
1057	req->int2 = mode;
1058
1059	EIO_SEND;
1060	}
1061
1062	void
1063	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1064	PROTOTYPE: $;$
1065	ALIAS:
1066	aio_fsync = EIO_FSYNC
1067	aio_fdatasync = EIO_FDATASYNC
1068	PPCODE:
1069	{
1070	dREQ;
1071
1072	req->type = ix;
1073	req->sv1 = newSVsv (fh);
1074	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1075
1076	EIO_SEND (req);
1077	}
1078
1079	void
1080	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1081	PROTOTYPE: $;$
1082	PPCODE:
1083	{
1084	dREQ;
1085
1086	req->type = EIO_CLOSE;
1087	req->sv1 = newSVsv (fh);
1088	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1089
1090	EIO_SEND (req);
1091	}
1092
1093	void
1094	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1095	ALIAS:
1096	aio_read = EIO_READ
1097	aio_write = EIO_WRITE
1098	PROTOTYPE: $$$$$;$
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	{	1133	{
1130	dREQ;	1134	struct timeval tv;
1131		1135
1132	req->type = ix;	1136	tv.tv_sec = req->nv1;
1133	req->sv1 = newSVsv (fh);	1137	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
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		1138
1142	if (!SvREADONLY (data))	1139	req->result = select (0, 0, 0, 0, &tv);
		1140	}
		1141	#endif
		1142	break;
		1143
		1144	case EIO_UTIME:
		1145	case EIO_FUTIME:
		1146	{
		1147	struct timeval tv[2];
		1148	struct timeval *times;
		1149
		1150	if (req->nv1 != -1. || req->nv2 != -1.)
1143	{	1151	{
1144	SvREADONLY_on (data);	1152	tv[0].tv_sec = req->nv1;
1145	req->flags |= FLAG_SV2_RO_OFF;	1153	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1154	tv[1].tv_sec = req->nv2;
		1155	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1156
		1157	times = tv;
1146	}	1158	}
		1159	else
		1160	times = 0;
1147		1161
1148	EIO_SEND;	1162
		1163	req->result = req->type == EIO_FUTIME
		1164	? futimes (req->int1, times)
		1165	: utimes (req->ptr1, times);
1149	}	1166	}
1150	}
1151		1167
1152	void	1168	case EIO_GROUP:
1153	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)	1169	case EIO_NOP:
1154	PROTOTYPE: $$;$	1170	req->result = 0;
1155	PPCODE:	1171	break;
1156	{
1157	SV *data;
1158	dREQ;
1159		1172
1160	data = newSV (NAME_MAX);	1173	case EIO_CUSTOM:
1161	SvPOK_on (data);	1174	req->feed (req);
		1175	break;
1162		1176
1163	req->type = EIO_READLINK;	1177	default:
1164	req->sv1 = newSVsv (path);	1178	req->result = -1;
1165	req->ptr1 = SvPVbyte_nolen (req->sv1);	1179	break;
1166	req->sv2 = data;	1180	}
1167	req->ptr2 = SvPVbyte_nolen (data);
1168		1181
1169	EIO_SEND;	1182	req->errorno = errno;
1170	}	1183	}
1171		1184
1172	void	1185	#ifndef EIO_NO_WRAPPERS
1173	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1174	PROTOTYPE: $$$$;$
1175	PPCODE:
1176	{
1177	dREQ;
1178		1186
1179	req->type = EIO_SENDFILE;	1187	eio_req *eio_nop (int pri, eio_cb cb, void *data)
1180	req->sv1 = newSVsv (out_fh);
1181	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1182	req->sv2 = newSVsv (in_fh);
1183	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1184	req->offs = SvVAL64 (in_offset);
1185	req->size = length;
1186
1187	EIO_SEND;
1188	}
1189
1190	void
1191	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1192	PROTOTYPE: $$$;$
1193	PPCODE:
1194	{	1188	{
1195	dREQ;	1189	REQ (EIO_NOP); SEND;
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	}	1190	}
1205		1191
1206	void	1192	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
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	{	1193	{
1213	dREQ;	1194	REQ (EIO_BUSY); req->nv1 = delay; SEND;
		1195	}
1214		1196
1215	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));	1197	eio_req *eio_sync (int pri, eio_cb cb, void *data)
1216	if (!req->ptr2)	1198	{
1217	{	1199	REQ (EIO_SYNC); SEND;
1218	req_destroy (req);	1200	}
1219	croak ("out of memory during aio_stat statdata allocation");
1220	}
1221		1201
		1202	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		1203	{
		1204	REQ (EIO_FSYNC); req->int1 = fd; SEND;
		1205	}
		1206
		1207	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
		1208	{
		1209	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
		1210	}
		1211
		1212	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		1213	{
		1214	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		1215	}
		1216
		1217	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
		1218	{
		1219	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
		1220	}
		1221
		1222	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		1223	{
		1224	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		1225	}
		1226
		1227	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
		1228	{
		1229	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
		1230	}
		1231
		1232	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
		1233	{
		1234	REQ (EIO_FSTAT); req->int1 = fd; SEND;
		1235	}
		1236
		1237	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
		1238	{
		1239	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
		1240	}
		1241
		1242	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
		1243	{
		1244	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
		1245	}
		1246
		1247	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
		1248	{
		1249	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
		1250	}
		1251
		1252	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
		1253	{
		1254	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		1255	}
		1256
		1257	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
		1258	{
		1259	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
		1260	}
		1261
		1262	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
		1263	{
		1264	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
		1265	}
		1266
		1267	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
		1268	{
		1269	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
		1270	}
		1271
		1272	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
		1273	{
		1274	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
		1275	}
		1276
		1277	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
		1278	{
		1279	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
		1280	}
		1281
		1282	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
		1283	{
		1284	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
		1285	}
		1286
		1287	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
		1288	{
		1289	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
		1290	}
		1291
		1292	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
		1293	{
		1294	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
		1295	}
		1296
		1297	static eio_req *
		1298	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
		1299	{
		1300	REQ (type); PATH; SEND;
		1301	}
		1302
		1303	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		1304	{
		1305	return eio__1path (EIO_READLINK, path, pri, cb, data);
		1306	}
		1307
		1308	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		1309	{
		1310	return eio__1path (EIO_STAT, path, pri, cb, data);
		1311	}
		1312
		1313	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		1314	{
		1315	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		1316	}
		1317
		1318	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		1319	{
		1320	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		1321	}
		1322
		1323	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
		1324	{
		1325	return eio__1path (EIO_RMDIR, path, pri, cb, data);
		1326	}
		1327
		1328	eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data)
		1329	{
		1330	return eio__1path (EIO_READDIR, path, pri, cb, data);
		1331	}
		1332
		1333	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
		1334	{
		1335	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND;
		1336	}
		1337
		1338	static eio_req *
		1339	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1340	{
		1341	REQ (type); PATH;
		1342
1222	req->flags |= FLAG_PTR2_FREE;	1343	req->flags |= EIO_FLAG_PTR2_FREE;
1223	req->sv1 = newSVsv (fh_or_path);	1344	req->ptr2 = strdup (new_path);
		1345	if (!req->ptr2)
		1346	{
		1347	eio_api_destroy (req);
		1348	return 0;
		1349	}
1224		1350
1225	if (SvPOK (fh_or_path))	1351	SEND;
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	}	1352	}
1238		1353
1239	void	1354	eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1240	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1241	PPCODE:
1242	{	1355	{
1243	dREQ;	1356	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
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	}	1357	}
1262		1358
1263	void	1359	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1264	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1265	PPCODE:
1266	{	1360	{
1267	dREQ;	1361	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
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	}	1362	}
1285		1363
1286	void	1364	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
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	{	1365	{
1294	dREQ;	1366	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
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	}	1367	}
1307		1368
1308	void	1369	eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data)
1309	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1310	PPCODE:
1311	{	1370	{
1312	dREQ;	1371	REQ (EIO_CUSTOM); req->feed = execute; SEND;
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	}	1372	}
1331		1373
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	1374	#endif
		1375
		1376	eio_req *eio_grp (eio_cb cb, void *data)
		1377	{
		1378	const int pri = EIO_PRI_MAX;
		1379
		1380	REQ (EIO_GROUP); SEND;
		1381	}
		1382
		1383	#undef REQ
		1384	#undef PATH
		1385	#undef SEND
		1386
		1387	/*****************************************************************************/
		1388	/* grp functions */
1418		1389
1419	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	1390	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1420	{	1391	{
1421	grp->int2 = limit;	1392	grp->int2 = limit;
1422	grp->feed = feed;	1393	grp->feed = feed;
…		…
1445	grp->grp_first->grp_prev = req;	1416	grp->grp_first->grp_prev = req;
1446		1417
1447	grp->grp_first = req;	1418	grp->grp_first = req;
1448	}	1419	}
1449		1420
		1421	/*****************************************************************************/
		1422	/* misc garbage */
1450		1423
		1424	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		1425	{
		1426	etp_worker wrk;
		1427
		1428	wrk.dbuf = 0;
		1429
		1430	eio__sendfile (ofd, ifd, offset, count, &wrk);
		1431
		1432	if (wrk.dbuf)
		1433	free (wrk.dbuf);
		1434	}
		1435

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