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Comparing libeio/eio.c (file contents):
Revision 1.8 by root, Sun May 11 20:08:37 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>
…		…
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_PTR1_FREE) free (req->ptr1);
277	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
278
279	EIO_DESTROY (req);
280	}
281
282	static int eio_finish (eio_req *req)
283	{
284	int res = EIO_FINISH (req);
285
286	if (req->grp)
287	{	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	X_LOCK (wrklock);	372	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
318	req->flags |= EIO_FLAG_CANCELLED;
319	X_UNLOCK (wrklock);
320		373
321	eio_grp_cancel (req);	374	pthread_once (&doinit, etp_once_init);
322	}
323		375
		376	want_poll_cb = want_poll;
		377	done_poll_cb = done_poll;
		378	}
		379
324	X_THREAD_PROC (eio_proc);	380	X_THREAD_PROC (etp_proc);
325		381
326	static void start_thread (void)	382	static void etp_start_thread (void)
327	{	383	{
328	worker *wrk = calloc (1, sizeof (worker));	384	etp_worker *wrk = calloc (1, sizeof (etp_worker));
329		385
330	/*TODO*/	386	/*TODO*/
331	assert (("unable to allocate worker thread data", !wrk));	387	assert (("unable to allocate worker thread data", wrk));
332		388
333	X_LOCK (wrklock);	389	X_LOCK (wrklock);
334		390
335	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	391	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
336	{	392	{
337	wrk->prev = &wrk_first;	393	wrk->prev = &wrk_first;
338	wrk->next = wrk_first.next;	394	wrk->next = wrk_first.next;
339	wrk_first.next->prev = wrk;	395	wrk_first.next->prev = wrk;
340	wrk_first.next = wrk;	396	wrk_first.next = wrk;
…		…
344	free (wrk);	400	free (wrk);
345		401
346	X_UNLOCK (wrklock);	402	X_UNLOCK (wrklock);
347	}	403	}
348		404
349	static void maybe_start_thread (void)	405	static void etp_maybe_start_thread (void)
350	{	406	{
351	if (eio_nthreads () >= wanted)	407	if (etp_nthreads () >= wanted)
352	return;	408	return;
353		409
354	/* todo: maybe use idle here, but might be less exact */	410	/* todo: maybe use idle here, but might be less exact */
355	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	411	if (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ())
356	return;	412	return;
357		413
358	start_thread ();	414	etp_start_thread ();
359	}	415	}
360		416
361	void eio_submit (eio_req *req)
362	{
363	++nreqs;
364
365	X_LOCK (reqlock);
366	++nready;
367	reqq_push (&req_queue, req);
368	X_COND_SIGNAL (reqwait);
369	X_UNLOCK (reqlock);
370
371	maybe_start_thread ();
372	}
373
374	static void end_thread (void)	417	static void etp_end_thread (void)
375	{	418	{
376	eio_req *req = calloc (1, sizeof (eio_req));	419	eio_req *req = calloc (1, sizeof (eio_req));
377		420
378	req->type = EIO_QUIT;	421	req->type = -1;
379	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	422	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
380		423
381	X_LOCK (reqlock);	424	X_LOCK (reqlock);
382	reqq_push (&req_queue, req);	425	reqq_push (&req_queue, req);
383	X_COND_SIGNAL (reqwait);	426	X_COND_SIGNAL (reqwait);
384	X_UNLOCK (reqlock);	427	X_UNLOCK (reqlock);
…		…
386	X_LOCK (wrklock);	429	X_LOCK (wrklock);
387	--started;	430	--started;
388	X_UNLOCK (wrklock);	431	X_UNLOCK (wrklock);
389	}	432	}
390		433
391	void eio_set_max_poll_time (double nseconds)
392	{
393	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
394	max_poll_time = nseconds;
395	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
396	}
397
398	void eio_set_max_poll_reqs (unsigned int maxreqs)
399	{
400	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
401	max_poll_reqs = maxreqs;
402	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
403	}
404
405	void eio_set_max_idle (unsigned int nthreads)
406	{
407	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
408	max_idle = nthreads <= 0 ? 1 : nthreads;
409	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
410	}
411
412	void eio_set_min_parallel (unsigned int nthreads)
413	{
414	if (wanted < nthreads)
415	wanted = nthreads;
416	}
417
418	void eio_set_max_parallel (unsigned int nthreads)
419	{
420	if (wanted > nthreads)
421	wanted = nthreads;
422
423	while (started > wanted)
424	end_thread ();
425	}
426
427	int eio_poll (void)	434	static int etp_poll (void)
428	{	435	{
429	int maxreqs = max_poll_reqs;	436	unsigned int maxreqs;
		437	unsigned int maxtime;
430	struct timeval tv_start, tv_now;	438	struct timeval tv_start, tv_now;
431	eio_req *req;
432		439
		440	X_LOCK (reslock);
		441	maxreqs = max_poll_reqs;
		442	maxtime = max_poll_time;
		443	X_UNLOCK (reslock);
		444
433	if (max_poll_time)	445	if (maxtime)
434	gettimeofday (&tv_start, 0);	446	gettimeofday (&tv_start, 0);
435		447
436	for (;;)	448	for (;;)
437	{	449	{
		450	ETP_REQ *req;
		451
438	maybe_start_thread ();	452	etp_maybe_start_thread ();
439		453
440	X_LOCK (reslock);	454	X_LOCK (reslock);
441	req = reqq_shift (&res_queue);	455	req = reqq_shift (&res_queue);
442		456
443	if (req)	457	if (req)
…		…
451	X_UNLOCK (reslock);	465	X_UNLOCK (reslock);
452		466
453	if (!req)	467	if (!req)
454	return 0;	468	return 0;
455		469
		470	X_LOCK (reqlock);
456	--nreqs;	471	--nreqs;
		472	X_UNLOCK (reqlock);
457		473
458	if (req->type == EIO_GROUP && req->size)	474	if (req->type == EIO_GROUP && req->size)
459	{	475	{
460	req->int1 = 1; /* mark request as delayed */	476	req->int1 = 1; /* mark request as delayed */
461	continue;	477	continue;
462	}	478	}
463	else	479	else
464	{	480	{
465	int res = eio_finish (req);	481	int res = ETP_FINISH (req);
466	if (res)	482	if (res)
467	return res;	483	return res;
468	}	484	}
469		485
470	if (maxreqs && !--maxreqs)	486	if (maxreqs && !--maxreqs)
471	break;	487	break;
472		488
473	if (max_poll_time)	489	if (maxtime)
474	{	490	{
475	gettimeofday (&tv_now, 0);	491	gettimeofday (&tv_now, 0);
476		492
477	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	493	if (tvdiff (&tv_start, &tv_now) >= maxtime)
478	break;	494	break;
479	}	495	}
480	}	496	}
481		497
482	errno = EAGAIN;	498	errno = EAGAIN;
483	return -1;	499	return -1;
484	}	500	}
485		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
486	/*****************************************************************************/	698	/*****************************************************************************/
487	/* work around various missing functions */	699	/* work around various missing functions */
488		700
489	#if !HAVE_PREADWRITE	701	#if !HAVE_PREADWRITE
490	# define pread aio_pread	702	# define pread eio__pread
491	# define pwrite aio_pwrite	703	# define pwrite eio__pwrite
492		704
493	/*	705	/*
494	* make our pread/pwrite safe against themselves, but not against	706	* make our pread/pwrite safe against themselves, but not against
495	* 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,
496	* but that's your problem, not mine.	708	* but that's your problem, not mine.
497	*/	709	*/
498	static mutex_t preadwritelock = X_MUTEX_INIT;	710	static mutex_t preadwritelock = X_MUTEX_INIT;
499		711
500	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)
501	{	714	{
502	ssize_t res;	715	ssize_t res;
503	off_t ooffset;	716	off_t ooffset;
504		717
505	X_LOCK (preadwritelock);	718	X_LOCK (preadwritelock);
…		…
510	X_UNLOCK (preadwritelock);	723	X_UNLOCK (preadwritelock);
511		724
512	return res;	725	return res;
513	}	726	}
514		727
515	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)
516	{	730	{
517	ssize_t res;	731	ssize_t res;
518	off_t ooffset;	732	off_t ooffset;
519		733
520	X_LOCK (preadwritelock);	734	X_LOCK (preadwritelock);
…		…
528	}	742	}
529	#endif	743	#endif
530		744
531	#ifndef HAVE_FUTIMES	745	#ifndef HAVE_FUTIMES
532		746
533	# define utimes(path,times) aio_utimes (path, times)	747	# define utimes(path,times) eio__utimes (path, times)
534	# define futimes(fd,times) aio_futimes (fd, times)	748	# define futimes(fd,times) eio__futimes (fd, times)
535		749
		750	static int
536	static int aio_utimes (const char *filename, const struct timeval times[2])	751	eio__utimes (const char *filename, const struct timeval times[2])
537	{	752	{
538	if (times)	753	if (times)
539	{	754	{
540	struct utimbuf buf;	755	struct utimbuf buf;
541		756
…		…
546	}	761	}
547	else	762	else
548	return utime (filename, 0);	763	return utime (filename, 0);
549	}	764	}
550		765
551	static int aio_futimes (int fd, const struct timeval tv[2])	766	static int eio__futimes (int fd, const struct timeval tv[2])
552	{	767	{
553	errno = ENOSYS;	768	errno = ENOSYS;
554	return -1;	769	return -1;
555	}	770	}
556		771
…		…
559	#if !HAVE_FDATASYNC	774	#if !HAVE_FDATASYNC
560	# define fdatasync fsync	775	# define fdatasync fsync
561	#endif	776	#endif
562		777
563	#if !HAVE_READAHEAD	778	#if !HAVE_READAHEAD
564	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	779	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
565		780
		781	static ssize_t
566	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)
567	{	783	{
568	size_t todo = count;	784	size_t todo = count;
569	dBUF;	785	dBUF;
570		786
571	while (todo > 0)	787	while (todo > 0)
…		…
582	}	798	}
583		799
584	#endif	800	#endif
585		801
586	#if !HAVE_READDIR_R	802	#if !HAVE_READDIR_R
587	# define readdir_r aio_readdir_r	803	# define readdir_r eio__readdir_r
588		804
589	static mutex_t readdirlock = X_MUTEX_INIT;	805	static mutex_t readdirlock = X_MUTEX_INIT;
590		806
		807	static int
591	static int readdir_r (DIR *dirp, EIO_STRUCT_DIRENT *ent, EIO_STRUCT_DIRENT **res)	808	eio__readdir_r (DIR *dirp, EIO_STRUCT_DIRENT *ent, EIO_STRUCT_DIRENT **res)
592	{	809	{
593	EIO_STRUCT_DIRENT *e;	810	EIO_STRUCT_DIRENT *e;
594	int errorno;	811	int errorno;
595		812
596	X_LOCK (readdirlock);	813	X_LOCK (readdirlock);
…		…
612	return e ? 0 : -1;	829	return e ? 0 : -1;
613	}	830	}
614	#endif	831	#endif
615		832
616	/* sendfile always needs emulation */	833	/* sendfile always needs emulation */
		834	static ssize_t
617	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)
618	{	836	{
619	ssize_t res;	837	ssize_t res;
620		838
621	if (!count)	839	if (!count)
622	return 0;	840	return 0;
…		…
705		923
706	return res;	924	return res;
707	}	925	}
708		926
709	/* read a full directory */	927	/* read a full directory */
		928	static void
710	static void scandir_ (eio_req *req, worker *self)	929	eio__scandir (eio_req *req, etp_worker *self)
711	{	930	{
712	DIR *dirp;	931	DIR *dirp;
713	union	932	union
714	{	933	{
715	EIO_STRUCT_DIRENT d;	934	EIO_STRUCT_DIRENT d;
…		…
782	req->result = -1; \	1001	req->result = -1; \
783	break; \	1002	break; \
784	} \	1003	} \
785	}	1004	}
786		1005
787	X_THREAD_PROC (eio_proc)	1006	X_THREAD_PROC (etp_proc)
788	{	1007	{
789	eio_req *req;	1008	ETP_REQ *req;
790	struct timespec ts;	1009	struct timespec ts;
791	worker *self = (worker *)thr_arg;	1010	etp_worker *self = (etp_worker *)thr_arg;
792		1011
793	/* try to distribute timeouts somewhat randomly */	1012	/* try to distribute timeouts somewhat randomly */
794	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1013	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
795		1014
796	for (;;)	1015	for (;;)
797	{	1016	{
798	ts.tv_sec = time (0) + IDLE_TIMEOUT;
799
800	X_LOCK (reqlock);	1017	X_LOCK (reqlock);
801		1018
802	for (;;)	1019	for (;;)
803	{	1020	{
804	self->req = req = reqq_shift (&req_queue);	1021	self->req = req = reqq_shift (&req_queue);
…		…
806	if (req)	1023	if (req)
807	break;	1024	break;
808		1025
809	++idle;	1026	++idle;
810		1027
		1028	ts.tv_sec = time (0) + IDLE_TIMEOUT;
811	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1029	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
812	{	1030	{
813	if (idle > max_idle)	1031	if (idle > max_idle)
814	{	1032	{
815	--idle;	1033	--idle;
…		…
820	goto quit;	1038	goto quit;
821	}	1039	}
822		1040
823	/* we are allowed to idle, so do so without any timeout */	1041	/* we are allowed to idle, so do so without any timeout */
824	X_COND_WAIT (reqwait, reqlock);	1042	X_COND_WAIT (reqwait, reqlock);
825	ts.tv_sec = time (0) + IDLE_TIMEOUT;
826	}	1043	}
827		1044
828	--idle;	1045	--idle;
829	}	1046	}
830		1047
…		…
843	: read (req->int1, req->ptr2, req->size); break;	1060	: read (req->int1, req->ptr2, req->size); break;
844	case EIO_WRITE: req->result = req->offs >= 0	1061	case EIO_WRITE: req->result = req->offs >= 0
845	? pwrite (req->int1, req->ptr2, req->size, req->offs)	1062	? pwrite (req->int1, req->ptr2, req->size, req->offs)
846	: write (req->int1, req->ptr2, req->size); break;	1063	: write (req->int1, req->ptr2, req->size); break;
847		1064
848	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;
849	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;
850		1067
851	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1068	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
852	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;	1069	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
853	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));	1070	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
854	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;	1071	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
…		…
878		1095
879	case EIO_SYNC: req->result = 0; sync (); break;	1096	case EIO_SYNC: req->result = 0; sync (); break;
880	case EIO_FSYNC: req->result = fsync (req->int1); break;	1097	case EIO_FSYNC: req->result = fsync (req->int1); break;
881	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;	1098	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
882		1099
883	case EIO_READDIR: scandir_ (req, self); break;	1100	case EIO_READDIR: eio__scandir (req, self); break;
884		1101
885	case EIO_BUSY:	1102	case EIO_BUSY:
886	#ifdef _WIN32	1103	#ifdef _WIN32
887	Sleep (req->nv1 * 1000.);	1104	Sleep (req->nv1 * 1000.);
888	#else	1105	#else
…		…
921	: utimes (req->ptr1, times);	1138	: utimes (req->ptr1, times);
922	}	1139	}
923		1140
924	case EIO_GROUP:	1141	case EIO_GROUP:
925	case EIO_NOP:	1142	case EIO_NOP:
		1143	req->result = 0;
926	break;	1144	break;
927		1145
928	case EIO_QUIT:	1146	case -1:
929	goto quit;	1147	goto quit;
930		1148
931	default:	1149	default:
932	req->result = -1;	1150	req->result = -1;
933	break;	1151	break;
…		…
941		1159
942	if (!reqq_push (&res_queue, req) && want_poll_cb)	1160	if (!reqq_push (&res_queue, req) && want_poll_cb)
943	want_poll_cb ();	1161	want_poll_cb ();
944		1162
945	self->req = 0;	1163	self->req = 0;
946	worker_clear (self);	1164	etp_worker_clear (self);
947		1165
948	X_UNLOCK (reslock);	1166	X_UNLOCK (reslock);
949	}	1167	}
950		1168
951	quit:	1169	quit:
952	X_LOCK (wrklock);	1170	X_LOCK (wrklock);
953	worker_free (self);	1171	etp_worker_free (self);
954	X_UNLOCK (wrklock);	1172	X_UNLOCK (wrklock);
955		1173
956	return 0;	1174	return 0;
957	}	1175	}
958		1176
959	/*****************************************************************************/	1177	/*****************************************************************************/
960		1178
961	static void eio_atfork_prepare (void)
962	{
963	X_LOCK (wrklock);
964	X_LOCK (reqlock);
965	X_LOCK (reslock);
966	#if !HAVE_PREADWRITE
967	X_LOCK (preadwritelock);
968	#endif
969	#if !HAVE_READDIR_R
970	X_LOCK (readdirlock);
971	#endif
972	}
973
974	static void eio_atfork_parent (void)
975	{
976	#if !HAVE_READDIR_R
977	X_UNLOCK (readdirlock);
978	#endif
979	#if !HAVE_PREADWRITE
980	X_UNLOCK (preadwritelock);
981	#endif
982	X_UNLOCK (reslock);
983	X_UNLOCK (reqlock);
984	X_UNLOCK (wrklock);
985	}
986
987	static void eio_atfork_child (void)
988	{
989	eio_req *prv;
990
991	while (prv = reqq_shift (&req_queue))
992	eio_destroy (prv);
993
994	while (prv = reqq_shift (&res_queue))
995	eio_destroy (prv);
996
997	while (wrk_first.next != &wrk_first)
998	{
999	worker *wrk = wrk_first.next;
1000
1001	if (wrk->req)
1002	eio_destroy (wrk->req);
1003
1004	worker_clear (wrk);
1005	worker_free (wrk);
1006	}
1007
1008	started = 0;
1009	idle = 0;
1010	nreqs = 0;
1011	nready = 0;
1012	npending = 0;
1013
1014	eio_atfork_parent ();
1015	}
1016
1017	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1179	int eio_init (void (*want_poll)(void), void (*done_poll)(void))
1018	{	1180	{
1019	want_poll_cb = want_poll;	1181	etp_init (want_poll, done_poll);
1020	done_poll_cb = done_poll;
1021
1022	#ifdef _WIN32
1023	X_MUTEX_CHECK (wrklock);
1024	X_MUTEX_CHECK (reslock);
1025	X_MUTEX_CHECK (reqlock);
1026	X_MUTEX_CHECK (reqwait);
1027	X_MUTEX_CHECK (preadwritelock);
1028	X_MUTEX_CHECK (readdirlock);
1029
1030	X_COND_CHECK (reqwait);
1031	#endif
1032
1033	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);
1034	}	1182	}
1035		1183
1036	static void eio_api_destroy (eio_req *req)	1184	static void eio_api_destroy (eio_req *req)
1037	{	1185	{
1038	free (req);	1186	free (req);
…		…
1043	\	1191	\
1044	req = (eio_req *)calloc (1, sizeof *req); \	1192	req = (eio_req *)calloc (1, sizeof *req); \
1045	if (!req) \	1193	if (!req) \
1046	return 0; \	1194	return 0; \
1047	\	1195	\
1048	req->type = EIO_ ## rtype; \	1196	req->type = rtype; \
1049	req->pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \	1197	req->pri = pri; \
1050	req->finish = cb; \	1198	req->finish = cb; \
		1199	req->data = data; \
1051	req->destroy = eio_api_destroy;	1200	req->destroy = eio_api_destroy;
1052		1201
1053	#define SEND eio_submit (req); return req	1202	#define SEND eio_submit (req); return req
1054		1203
1055	#define PATH (void)0	1204	#define PATH \
		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	}
1056		1212
		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
1057	eio_req *eio_fsync (int fd, eio_cb cb)	1225	eio_req *eio_sync (int pri, eio_cb cb, void *data)
1058	{	1226	{
		1227	REQ (EIO_SYNC); SEND;
		1228	}
		1229
		1230	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		1231	{
1059	REQ (FSYNC); req->int1 = fd; SEND;	1232	REQ (EIO_FSYNC); req->int1 = fd; SEND;
1060	}	1233	}
1061		1234
1062	eio_req *eio_fdatasync (int fd, eio_cb cb)	1235	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1063	{	1236	{
1064	REQ (FDATASYNC); req->int1 = fd; SEND;	1237	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1065	}	1238	}
1066		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
1067	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb)	1245	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
1068	{	1246	{
1069	REQ (READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;	1247	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
1070	}	1248	}
1071		1249
1072	eio_req *eio_read (int fd, off_t offset, size_t length, void *data, eio_cb cb)	1250	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1073	{	1251	{
1074	REQ (READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	1252	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1075	}	1253	}
1076		1254
1077	eio_req *eio_write (int fd, off_t offset, size_t length, void *data, eio_cb cb)	1255	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1078	{	1256	{
1079	REQ (WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	1257	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1080	}	1258	}
1081		1259
1082	eio_req *eio_fstat (int fd, eio_cb cb)	1260	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
1083	{	1261	{
1084	REQ (FSTAT); req->int1 = fd; SEND;	1262	REQ (EIO_FSTAT); req->int1 = fd; SEND;
1085	}	1263	}
1086		1264
1087	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb)	1265	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
1088	{	1266	{
1089	REQ (FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;	1267	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
1090	}	1268	}
1091		1269
1092	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb)	1270	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
1093	{	1271	{
1094	REQ (FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;	1272	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
1095	}	1273	}
1096		1274
1097	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb)	1275	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
1098	{	1276	{
1099	REQ (FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;	1277	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1100	}	1278	}
1101		1279
1102	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb)	1280	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
1103	{	1281	{
1104	REQ (FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	1282	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1105	}	1283	}
1106		1284
1107	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb)	1285	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
1108	{	1286	{
1109	REQ (DUP2); req->int1 = fd; req->int2 = fd2; SEND;	1287	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
1110	}	1288	}
1111		1289
1112	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb)	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)
1113	{	1291	{
1114	REQ (SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;	1292	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
1115	}	1293	}
1116		1294
1117	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb)	1295	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
1118	{	1296	{
1119	REQ (OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;	1297	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
1120	}	1298	}
1121		1299
1122	eio_req *eio_readlink (const char *path, eio_cb cb)
1123	{
1124	REQ (READLINK); PATH; SEND;
1125	}
1126
1127	eio_req *eio_stat (const char *path, eio_cb cb)
1128	{
1129	REQ (STAT); PATH; SEND;
1130	}
1131
1132	eio_req *eio_lstat (const char *path, eio_cb cb)
1133	{
1134	REQ (LSTAT); PATH; SEND;
1135	}
1136
1137	eio_req *eio_utime (const char *path, double atime, double mtime, eio_cb cb)	1300	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
1138	{	1301	{
1139	REQ (UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;	1302	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
1140	}	1303	}
1141		1304
1142	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb)	1305	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
1143	{	1306	{
1144	REQ (TRUNCATE); PATH; req->offs = offset; SEND;	1307	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1145	}	1308	}
1146		1309
1147	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb)	1310	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
1148	{	1311	{
1149	REQ (CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	1312	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1150	}	1313	}
1151		1314
1152	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb)	1315	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1153	{	1316	{
1154	REQ (CHMOD); PATH; req->int2 = (long)mode; SEND;	1317	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
1155	}	1318	}
1156		1319
1157	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb)	1320	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1158	{	1321	{
1159	REQ (MKDIR); PATH; req->int2 = (long)mode; SEND;	1322	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
1160	}	1323	}
1161		1324
1162	eio_req *eio_unlink (const char *path, eio_cb cb)	1325	static eio_req *
		1326	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
1163	{	1327	{
1164	REQ (UNLINK); PATH; SEND;
1165	}
1166
1167	eio_req *eio_rmdir (const char *path, eio_cb cb)
1168	{
1169	REQ (RMDIR); PATH; SEND;	1328	REQ (type); PATH; SEND;
1170	}	1329	}
1171		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
1172	eio_req *eio_readdir (const char *path, eio_cb cb)	1356	eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data)
1173	{	1357	{
1174	REQ (READDIR); PATH; SEND;	1358	return eio__1path (EIO_READDIR, path, pri, cb, data);
1175	}	1359	}
1176		1360
1177	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb)	1361	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1178	{	1362	{
1179	REQ (MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND;	1363	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND;
1180	}	1364	}
1181		1365
1182	eio_req *eio_busy (double delay, eio_cb cb)	1366	static eio_req *
		1367	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1183	{	1368	{
1184	REQ (BUSY); req->nv1 = delay; SEND;	1369	REQ (type); PATH;
1185	}
1186		1370
		1371	req->flags |= EIO_FLAG_PTR2_FREE;
		1372	req->ptr2 = strdup (new_path);
		1373	if (!req->ptr2)
		1374	{
		1375	eio_api_destroy (req);
		1376	return 0;
		1377	}
		1378
		1379	SEND;
		1380	}
		1381
		1382	eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1383	{
		1384	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
		1385	}
		1386
		1387	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1388	{
		1389	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
		1390	}
		1391
		1392	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1393	{
		1394	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
		1395	}
		1396
		1397	#endif
		1398
1187	eio_req *eio_nop (eio_cb cb)	1399	eio_req *eio_grp (eio_cb cb, void *data)
1188	{	1400	{
		1401	const int pri = EIO_PRI_MAX;
		1402
1189	REQ (NOP); SEND;	1403	REQ (EIO_GROUP); SEND;
1190	}	1404	}
1191		1405
1192	#undef REQ	1406	#undef REQ
1193	#undef PATH	1407	#undef PATH
1194	#undef SEND	1408	#undef SEND
1195		1409
1196	#if 0	1410	/*****************************************************************************/
1197		1411	/* grp functions */
1198	void
1199	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1200	PROTOTYPE: $$$;$
1201	PPCODE:
1202	{
1203	dREQ;
1204
1205	req->type = EIO_OPEN;
1206	req->sv1 = newSVsv (pathname);
1207	req->ptr1 = SvPVbyte_nolen (req->sv1);
1208	req->int1 = flags;
1209	req->int2 = mode;
1210
1211	EIO_SEND;
1212	}
1213
1214	void
1215	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1216	PROTOTYPE: $;$
1217	ALIAS:
1218	aio_fsync = EIO_FSYNC
1219	aio_fdatasync = EIO_FDATASYNC
1220	PPCODE:
1221	{
1222	dREQ;
1223
1224	req->type = ix;
1225	req->sv1 = newSVsv (fh);
1226	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1227
1228	EIO_SEND (req);
1229	}
1230
1231	void
1232	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1233	PROTOTYPE: $;$
1234	PPCODE:
1235	{
1236	dREQ;
1237
1238	req->type = EIO_CLOSE;
1239	req->sv1 = newSVsv (fh);
1240	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1241
1242	EIO_SEND (req);
1243	}
1244
1245	void
1246	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1247	ALIAS:
1248	aio_read = EIO_READ
1249	aio_write = EIO_WRITE
1250	PROTOTYPE: $$$$$;$
1251	PPCODE:
1252	{
1253	STRLEN svlen;
1254	char *svptr = SvPVbyte (data, svlen);
1255	UV len = SvUV (length);
1256
1257	SvUPGRADE (data, SVt_PV);
1258	SvPOK_on (data);
1259
1260	if (dataoffset < 0)
1261	dataoffset += svlen;
1262
1263	if (dataoffset < 0 || dataoffset > svlen)
1264	croak ("dataoffset outside of data scalar");
1265
1266	if (ix == EIO_WRITE)
1267	{
1268	/* write: check length and adjust. */
1269	if (!SvOK (length) || len + dataoffset > svlen)
1270	len = svlen - dataoffset;
1271	}
1272	else
1273	{
1274	/* read: grow scalar as necessary */
1275	svptr = SvGROW (data, len + dataoffset + 1);
1276	}
1277
1278	if (len < 0)
1279	croak ("length must not be negative");
1280
1281	{
1282	dREQ;
1283
1284	req->type = ix;
1285	req->sv1 = newSVsv (fh);
1286	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1287	: IoOFP (sv_2io (fh)));
1288	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1289	req->size = len;
1290	req->sv2 = SvREFCNT_inc (data);
1291	req->ptr2 = (char *)svptr + dataoffset;
1292	req->stroffset = dataoffset;
1293
1294	if (!SvREADONLY (data))
1295	{
1296	SvREADONLY_on (data);
1297	req->flags |= FLAG_SV2_RO_OFF;
1298	}
1299
1300	EIO_SEND;
1301	}
1302	}
1303
1304	void
1305	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1306	PROTOTYPE: $$;$
1307	PPCODE:
1308	{
1309	SV *data;
1310	dREQ;
1311
1312	data = newSV (NAME_MAX);
1313	SvPOK_on (data);
1314
1315	req->type = EIO_READLINK;
1316	req->sv1 = newSVsv (path);
1317	req->ptr1 = SvPVbyte_nolen (req->sv1);
1318	req->sv2 = data;
1319	req->ptr2 = SvPVbyte_nolen (data);
1320
1321	EIO_SEND;
1322	}
1323
1324	void
1325	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1326	PROTOTYPE: $$$$;$
1327	PPCODE:
1328	{
1329	dREQ;
1330
1331	req->type = EIO_SENDFILE;
1332	req->sv1 = newSVsv (out_fh);
1333	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1334	req->sv2 = newSVsv (in_fh);
1335	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1336	req->offs = SvVAL64 (in_offset);
1337	req->size = length;
1338
1339	EIO_SEND;
1340	}
1341
1342	void
1343	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1344	PROTOTYPE: $$$;$
1345	PPCODE:
1346	{
1347	dREQ;
1348
1349	req->type = EIO_READAHEAD;
1350	req->sv1 = newSVsv (fh);
1351	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1352	req->offs = SvVAL64 (offset);
1353	req->size = length;
1354
1355	EIO_SEND;
1356	}
1357
1358	void
1359	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1360	ALIAS:
1361	aio_stat = EIO_STAT
1362	aio_lstat = EIO_LSTAT
1363	PPCODE:
1364	{
1365	dREQ;
1366
1367	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1368	if (!req->ptr2)
1369	{
1370	req_destroy (req);
1371	croak ("out of memory during aio_stat statdata allocation");
1372	}
1373
1374	req->flags |= FLAG_PTR2_FREE;
1375	req->sv1 = newSVsv (fh_or_path);
1376
1377	if (SvPOK (fh_or_path))
1378	{
1379	req->type = ix;
1380	req->ptr1 = SvPVbyte_nolen (req->sv1);
1381	}
1382	else
1383	{
1384	req->type = EIO_FSTAT;
1385	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1386	}
1387
1388	EIO_SEND;
1389	}
1390
1391	void
1392	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1393	PPCODE:
1394	{
1395	dREQ;
1396
1397	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1398	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1399	req->sv1 = newSVsv (fh_or_path);
1400
1401	if (SvPOK (fh_or_path))
1402	{
1403	req->type = EIO_UTIME;
1404	req->ptr1 = SvPVbyte_nolen (req->sv1);
1405	}
1406	else
1407	{
1408	req->type = EIO_FUTIME;
1409	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1410	}
1411
1412	EIO_SEND;
1413	}
1414
1415	void
1416	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1417	PPCODE:
1418	{
1419	dREQ;
1420
1421	req->sv1 = newSVsv (fh_or_path);
1422	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1423
1424	if (SvPOK (fh_or_path))
1425	{
1426	req->type = EIO_TRUNCATE;
1427	req->ptr1 = SvPVbyte_nolen (req->sv1);
1428	}
1429	else
1430	{
1431	req->type = EIO_FTRUNCATE;
1432	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1433	}
1434
1435	EIO_SEND;
1436	}
1437
1438	void
1439	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1440	ALIAS:
1441	aio_chmod = EIO_CHMOD
1442	aio_fchmod = EIO_FCHMOD
1443	aio_mkdir = EIO_MKDIR
1444	PPCODE:
1445	{
1446	dREQ;
1447
1448	req->type = type;
1449	req->int2 = mode;
1450	req->sv1 = newSVsv (fh_or_path);
1451
1452	if (ix == EIO_FCHMOD)
1453	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1454	else
1455	req->ptr1 = SvPVbyte_nolen (req->sv1);
1456
1457	EIO_SEND;
1458	}
1459
1460	void
1461	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1462	PPCODE:
1463	{
1464	dREQ;
1465
1466	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1467	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1468	req->sv1 = newSVsv (fh_or_path);
1469
1470	if (SvPOK (fh_or_path))
1471	{
1472	req->type = EIO_CHOWN;
1473	req->ptr1 = SvPVbyte_nolen (req->sv1);
1474	}
1475	else
1476	{
1477	req->type = EIO_FCHOWN;
1478	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1479	}
1480
1481	EIO_SEND;
1482	}
1483
1484	void
1485	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1486	ALIAS:
1487	aio_unlink = EIO_UNLINK
1488	aio_rmdir = EIO_RMDIR
1489	aio_readdir = EIO_READDIR
1490	PPCODE:
1491	{
1492	dREQ;
1493
1494	req->type = ix;
1495	req->sv1 = newSVsv (pathname);
1496	req->ptr1 = SvPVbyte_nolen (req->sv1);
1497
1498	EIO_SEND;
1499	}
1500
1501	void
1502	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1503	ALIAS:
1504	aio_link = EIO_LINK
1505	aio_symlink = EIO_SYMLINK
1506	aio_rename = EIO_RENAME
1507	PPCODE:
1508	{
1509	dREQ;
1510
1511	req->type = ix;
1512	req->sv1 = newSVsv (oldpath);
1513	req->ptr1 = SvPVbyte_nolen (req->sv1);
1514	req->sv2 = newSVsv (newpath);
1515	req->ptr2 = SvPVbyte_nolen (req->sv2);
1516
1517	EIO_SEND;
1518	}
1519
1520	void
1521	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1522	PPCODE:
1523	{
1524	dREQ;
1525
1526	req->type = EIO_MKNOD;
1527	req->sv1 = newSVsv (pathname);
1528	req->ptr1 = SvPVbyte_nolen (req->sv1);
1529	req->int2 = (mode_t)mode;
1530	req->offs = dev;
1531
1532	EIO_SEND;
1533	}
1534
1535	void
1536	aio_busy (double delay, SV *callback=&PL_sv_undef)
1537	PPCODE:
1538	{
1539	dREQ;
1540
1541	req->type = EIO_BUSY;
1542	req->nv1 = delay < 0. ? 0. : delay;
1543
1544	EIO_SEND;
1545	}
1546
1547	void
1548	aio_group (SV *callback=&PL_sv_undef)
1549	PROTOTYPE: ;$
1550	PPCODE:
1551	{
1552	dREQ;
1553
1554	req->type = EIO_GROUP;
1555
1556	req_send (req);
1557	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1558	}
1559
1560	void
1561	aio_nop (SV *callback=&PL_sv_undef)
1562	ALIAS:
1563	aio_nop = EIO_NOP
1564	aio_sync = EIO_SYNC
1565	PPCODE:
1566	{
1567	dREQ;
1568
1569	#endif
1570		1412
1571	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)
1572	{	1414	{
1573	grp->int2 = limit;	1415	grp->int2 = limit;
1574	grp->feed = feed;	1416	grp->feed = feed;
…		…
1597	grp->grp_first->grp_prev = req;	1439	grp->grp_first->grp_prev = req;
1598		1440
1599	grp->grp_first = req;	1441	grp->grp_first = req;
1600	}	1442	}
1601		1443
		1444	/*****************************************************************************/
		1445	/* misc garbage */
1602		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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