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Comparing libeio/eio.c (file contents):
Revision 1.6 by root, Sun May 11 19:11:05 2008 UTC vs.
Revision 1.30 by root, Wed Jun 3 12:24:49 2009 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"
		41
		42	#ifdef EIO_STACKSIZE
		43	# define XTHREAD_STACKSIZE EIO_STACKSIZE
		44	#endif
2	#include "xthread.h"	45	#include "xthread.h"
3		46
4	#include <errno.h>	47	#include <errno.h>
5	#include <stddef.h>	48	#include <stddef.h>
6	#include <stdlib.h>	49	#include <stdlib.h>
…		…
8	#include <errno.h>	51	#include <errno.h>
9	#include <sys/types.h>	52	#include <sys/types.h>
10	#include <sys/stat.h>	53	#include <sys/stat.h>
11	#include <limits.h>	54	#include <limits.h>
12	#include <fcntl.h>	55	#include <fcntl.h>
13	#include <sched.h>	56	#include <assert.h>
14		57
15	#ifndef EIO_FINISH	58	#ifndef EIO_FINISH
16	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	59	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
17	#endif	60	#endif
18		61
…		…
41	# ifndef EIO_STRUCT_DIRENT	84	# ifndef EIO_STRUCT_DIRENT
42	# define EIO_STRUCT_DIRENT struct dirent	85	# define EIO_STRUCT_DIRENT struct dirent
43	# endif	86	# endif
44		87
45	#endif	88	#endif
46
47	# ifndef EIO_STRUCT_STAT
48	# define EIO_STRUCT_STAT struct stat
49	# endif
50		89
51	#if HAVE_SENDFILE	90	#if HAVE_SENDFILE
52	# if __linux	91	# if __linux
53	# include <sys/sendfile.h>	92	# include <sys/sendfile.h>
54	# elif __freebsd	93	# elif __freebsd
…		…
74	/* buffer size for various temporary buffers */	113	/* buffer size for various temporary buffers */
75	#define EIO_BUFSIZE 65536	114	#define EIO_BUFSIZE 65536
76		115
77	#define dBUF \	116	#define dBUF \
78	char *eio_buf; \	117	char *eio_buf; \
79	X_LOCK (wrklock); \	118	ETP_WORKER_LOCK (self); \
80	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	119	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \
81	X_UNLOCK (wrklock); \	120	ETP_WORKER_UNLOCK (self); \
		121	errno = ENOMEM; \
82	if (!eio_buf) \	122	if (!eio_buf) \
83	return -1;	123	return -1;
84		124
85	#define EIO_TICKS ((1000000 + 1023) >> 10)	125	#define EIO_TICKS ((1000000 + 1023) >> 10)
86		126
		127	/*****************************************************************************/
		128
		129	#if __GNUC__ >= 3
		130	# define expect(expr,value) __builtin_expect ((expr),(value))
		131	#else
		132	# define expect(expr,value) (expr)
		133	#endif
		134
		135	#define expect_false(expr) expect ((expr) != 0, 0)
		136	#define expect_true(expr) expect ((expr) != 0, 1)
		137
		138	/*****************************************************************************/
		139
		140	#define ETP_PRI_MIN EIO_PRI_MIN
		141	#define ETP_PRI_MAX EIO_PRI_MAX
		142
		143	struct etp_worker;
		144
		145	#define ETP_REQ eio_req
		146	#define ETP_DESTROY(req) eio_destroy (req)
		147	static int eio_finish (eio_req *req);
		148	#define ETP_FINISH(req) eio_finish (req)
		149	static void eio_execute (struct etp_worker *self, eio_req *req);
		150	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		151
		152	#define ETP_WORKER_CLEAR(req) \
		153	if (wrk->dbuf) \
		154	{ \
		155	free (wrk->dbuf); \
		156	wrk->dbuf = 0; \
		157	} \
		158	\
		159	if (wrk->dirp) \
		160	{ \
		161	closedir (wrk->dirp); \
		162	wrk->dirp = 0; \
		163	}
		164	#define ETP_WORKER_COMMON \
		165	void *dbuf; \
		166	DIR *dirp;
		167
		168	/*****************************************************************************/
		169
		170	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		171
		172	/* calculcate time difference in ~1/EIO_TICKS of a second */
		173	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		174	{
		175	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		176	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		177	}
		178
		179	static unsigned int started, idle, wanted = 4;
		180
87	static void (*want_poll_cb) (void);	181	static void (*want_poll_cb) (void);
88	static void (*done_poll_cb) (void);	182	static void (*done_poll_cb) (void);
89		183
90	static unsigned int max_poll_time = 0;	184	static unsigned int max_poll_time; /* reslock */
91	static unsigned int max_poll_reqs = 0;	185	static unsigned int max_poll_reqs; /* reslock */
92		186
93	/* calculcate time difference in ~1/EIO_TICKS of a second */	187	static volatile unsigned int nreqs; /* reqlock */
94	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	188	static volatile unsigned int nready; /* reqlock */
95	{	189	static volatile unsigned int npending; /* reqlock */
96	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	190	static volatile unsigned int max_idle = 4;
97	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
98	}
99		191
100	static unsigned int started, idle, wanted;
101
102	/* worker threads management */
103	static mutex_t wrklock = X_MUTEX_INIT;	192	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;	193	static mutex_t reslock = X_MUTEX_INIT;
146	static mutex_t reqlock = X_MUTEX_INIT;	194	static mutex_t reqlock = X_MUTEX_INIT;
147	static cond_t reqwait = X_COND_INIT;	195	static cond_t reqwait = X_COND_INIT;
148		196
		197	#if !HAVE_PREADWRITE
		198	/*
		199	* make our pread/pwrite emulation safe against themselves, but not against
		200	* normal read/write by using a mutex. slows down execution a lot,
		201	* but that's your problem, not mine.
		202	*/
		203	static mutex_t preadwritelock = X_MUTEX_INIT;
		204	#endif
		205
		206	typedef struct etp_worker
		207	{
		208	/* locked by wrklock */
		209	struct etp_worker *prev, *next;
		210
		211	thread_t tid;
		212
		213	/* locked by reslock, reqlock or wrklock */
		214	ETP_REQ *req; /* currently processed request */
		215
		216	ETP_WORKER_COMMON
		217	} etp_worker;
		218
		219	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
		220
		221	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		222	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
		223
		224	/* worker threads management */
		225
		226	static void etp_worker_clear (etp_worker *wrk)
		227	{
		228	ETP_WORKER_CLEAR (wrk);
		229	}
		230
		231	static void etp_worker_free (etp_worker *wrk)
		232	{
		233	wrk->next->prev = wrk->prev;
		234	wrk->prev->next = wrk->next;
		235
		236	free (wrk);
		237	}
		238
149	unsigned int eio_nreqs (void)	239	static unsigned int etp_nreqs (void)
150	{	240	{
		241	int retval;
		242	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		243	retval = nreqs;
		244	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
151	return nreqs;	245	return retval;
152	}	246	}
153		247
154	unsigned int eio_nready (void)	248	static unsigned int etp_nready (void)
155	{	249	{
156	unsigned int retval;	250	unsigned int retval;
157		251
158	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	252	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
159	retval = nready;	253	retval = nready;
160	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	254	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
161		255
162	return retval;	256	return retval;
163	}	257	}
164		258
165	unsigned int eio_npending (void)	259	static unsigned int etp_npending (void)
166	{	260	{
167	unsigned int retval;	261	unsigned int retval;
168		262
169	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	263	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
170	retval = npending;	264	retval = npending;
171	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	265	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
172		266
173	return retval;	267	return retval;
174	}	268	}
175		269
176	unsigned int eio_nthreads (void)	270	static unsigned int etp_nthreads (void)
177	{	271	{
178	unsigned int retval;	272	unsigned int retval;
179		273
180	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	274	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
181	retval = started;	275	retval = started;
…		…
188	* a somewhat faster data structure might be nice, but	282	* a somewhat faster data structure might be nice, but
189	* with 8 priorities this actually needs <20 insns	283	* with 8 priorities this actually needs <20 insns
190	* per shift, the most expensive operation.	284	* per shift, the most expensive operation.
191	*/	285	*/
192	typedef struct {	286	typedef struct {
193	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	287	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
194	int size;	288	int size;
195	} reqq;	289	} etp_reqq;
196		290
197	static reqq req_queue;	291	static etp_reqq req_queue;
198	static reqq res_queue;	292	static etp_reqq res_queue;
199		293
200	static int reqq_push (reqq *q, eio_req *req)	294	static int reqq_push (etp_reqq *q, ETP_REQ *req)
201	{	295	{
202	int pri = req->pri;	296	int pri = req->pri;
203	req->next = 0;	297	req->next = 0;
204		298
205	if (q->qe[pri])	299	if (q->qe[pri])
…		…
211	q->qe[pri] = q->qs[pri] = req;	305	q->qe[pri] = q->qs[pri] = req;
212		306
213	return q->size++;	307	return q->size++;
214	}	308	}
215		309
216	static eio_req *reqq_shift (reqq *q)	310	static ETP_REQ *reqq_shift (etp_reqq *q)
217	{	311	{
218	int pri;	312	int pri;
219		313
220	if (!q->size)	314	if (!q->size)
221	return 0;	315	return 0;
222		316
223	--q->size;	317	--q->size;
224		318
225	for (pri = EIO_NUM_PRI; pri--; )	319	for (pri = ETP_NUM_PRI; pri--; )
226	{	320	{
227	eio_req *req = q->qs[pri];	321	eio_req *req = q->qs[pri];
228		322
229	if (req)	323	if (req)
230	{	324	{
…		…
236	}	330	}
237		331
238	abort ();	332	abort ();
239	}	333	}
240		334
241	static void grp_try_feed (eio_req *grp)	335	static void etp_atfork_prepare (void)
242	{	336	{
243	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	337	X_LOCK (wrklock);
		338	X_LOCK (reqlock);
		339	X_LOCK (reslock);
		340	#if !HAVE_PREADWRITE
		341	X_LOCK (preadwritelock);
		342	#endif
		343	}
		344
		345	static void etp_atfork_parent (void)
		346	{
		347	#if !HAVE_PREADWRITE
		348	X_UNLOCK (preadwritelock);
		349	#endif
		350	X_UNLOCK (reslock);
		351	X_UNLOCK (reqlock);
		352	X_UNLOCK (wrklock);
		353	}
		354
		355	static void etp_atfork_child (void)
		356	{
		357	ETP_REQ *prv;
		358
		359	while ((prv = reqq_shift (&req_queue)))
		360	ETP_DESTROY (prv);
		361
		362	while ((prv = reqq_shift (&res_queue)))
		363	ETP_DESTROY (prv);
		364
		365	while (wrk_first.next != &wrk_first)
244	{	366	{
245	int old_len = grp->size;	367	etp_worker *wrk = wrk_first.next;
246		368
247	EIO_FEED (grp);	369	if (wrk->req)
		370	ETP_DESTROY (wrk->req);
248		371
249	/* stop if no progress has been made */	372	etp_worker_clear (wrk);
250	if (old_len == grp->size)	373	etp_worker_free (wrk);
251	{
252	grp->feed = 0;
253	break;
254	}
255	}	374	}
256	}
257		375
258	static int eio_finish (eio_req *req);	376	started = 0;
		377	idle = 0;
		378	nreqs = 0;
		379	nready = 0;
		380	npending = 0;
259		381
260	static int grp_dec (eio_req *grp)	382	etp_atfork_parent ();
261	{	383	}
262	--grp->size;
263		384
264	/* call feeder, if applicable */	385	static void
265	grp_try_feed (grp);	386	etp_once_init (void)
		387	{
		388	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
		389	}
266		390
267	/* finish, if done */	391	static int
268	if (!grp->size && grp->int1)	392	etp_init (void (*want_poll)(void), void (*done_poll)(void))
269	return eio_finish (grp);	393	{
270	else	394	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
		395
		396	pthread_once (&doinit, etp_once_init);
		397
		398	want_poll_cb = want_poll;
		399	done_poll_cb = done_poll;
		400
271	return 0;	401	return 0;
272	}	402	}
273		403
274	void eio_destroy (eio_req *req)
275	{
276	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
277	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
278
279	EIO_DESTROY (req);
280	}
281
282	static int eio_finish (eio_req *req)
283	{
284	int res = EIO_FINISH (req);
285
286	if (req->grp)
287	{
288	int res2;
289	eio_req *grp = req->grp;
290
291	/* unlink request */
292	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
293	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
294
295	if (grp->grp_first == req)
296	grp->grp_first = req->grp_next;
297
298	res2 = grp_dec (grp);
299
300	if (!res && res2)
301	res = res2;
302	}
303
304	eio_destroy (req);
305
306	return res;
307	}
308
309	void eio_grp_cancel (eio_req *grp)
310	{
311	for (grp = grp->grp_first; grp; grp = grp->grp_next)
312	eio_cancel (grp);
313	}
314
315	void eio_cancel (eio_req *req)
316	{
317	X_LOCK (wrklock);
318	req->flags |= EIO_FLAG_CANCELLED;
319	X_UNLOCK (wrklock);
320
321	eio_grp_cancel (req);
322	}
323
324	X_THREAD_PROC (eio_proc);	404	X_THREAD_PROC (etp_proc);
325		405
326	static void start_thread (void)	406	static void etp_start_thread (void)
327	{	407	{
328	worker *wrk = calloc (1, sizeof (worker));	408	etp_worker *wrk = calloc (1, sizeof (etp_worker));
329		409
330	if (!wrk)	410	/*TODO*/
331	croak ("unable to allocate worker thread data");	411	assert (("unable to allocate worker thread data", wrk));
332		412
333	X_LOCK (wrklock);	413	X_LOCK (wrklock);
334		414
335	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	415	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
336	{	416	{
337	wrk->prev = &wrk_first;	417	wrk->prev = &wrk_first;
338	wrk->next = wrk_first.next;	418	wrk->next = wrk_first.next;
339	wrk_first.next->prev = wrk;	419	wrk_first.next->prev = wrk;
340	wrk_first.next = wrk;	420	wrk_first.next = wrk;
…		…
344	free (wrk);	424	free (wrk);
345		425
346	X_UNLOCK (wrklock);	426	X_UNLOCK (wrklock);
347	}	427	}
348		428
349	static void maybe_start_thread (void)	429	static void etp_maybe_start_thread (void)
350	{	430	{
351	if (eio_nthreads () >= wanted)	431	if (expect_true (etp_nthreads () >= wanted))
352	return;	432	return;
353		433
354	/* todo: maybe use idle here, but might be less exact */	434	/* todo: maybe use idle here, but might be less exact */
355	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	435	if (expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
356	return;	436	return;
357		437
358	start_thread ();	438	etp_start_thread ();
359	}	439	}
360		440
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)	441	static void etp_end_thread (void)
375	{	442	{
376	eio_req *req = calloc (1, sizeof (eio_req));	443	eio_req *req = calloc (1, sizeof (eio_req));
377		444
378	req->type = EIO_QUIT;	445	req->type = -1;
379	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	446	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
380		447
381	X_LOCK (reqlock);	448	X_LOCK (reqlock);
382	reqq_push (&req_queue, req);	449	reqq_push (&req_queue, req);
383	X_COND_SIGNAL (reqwait);	450	X_COND_SIGNAL (reqwait);
384	X_UNLOCK (reqlock);	451	X_UNLOCK (reqlock);
…		…
386	X_LOCK (wrklock);	453	X_LOCK (wrklock);
387	--started;	454	--started;
388	X_UNLOCK (wrklock);	455	X_UNLOCK (wrklock);
389	}	456	}
390		457
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)	458	static int etp_poll (void)
428	{	459	{
429	int maxreqs = max_poll_reqs;	460	unsigned int maxreqs;
		461	unsigned int maxtime;
430	struct timeval tv_start, tv_now;	462	struct timeval tv_start, tv_now;
431	eio_req *req;
432		463
		464	X_LOCK (reslock);
		465	maxreqs = max_poll_reqs;
		466	maxtime = max_poll_time;
		467	X_UNLOCK (reslock);
		468
433	if (max_poll_time)	469	if (maxtime)
434	gettimeofday (&tv_start, 0);	470	gettimeofday (&tv_start, 0);
435		471
436	for (;;)	472	for (;;)
437	{	473	{
		474	ETP_REQ *req;
		475
438	maybe_start_thread ();	476	etp_maybe_start_thread ();
439		477
440	X_LOCK (reslock);	478	X_LOCK (reslock);
441	req = reqq_shift (&res_queue);	479	req = reqq_shift (&res_queue);
442		480
443	if (req)	481	if (req)
…		…
451	X_UNLOCK (reslock);	489	X_UNLOCK (reslock);
452		490
453	if (!req)	491	if (!req)
454	return 0;	492	return 0;
455		493
		494	X_LOCK (reqlock);
456	--nreqs;	495	--nreqs;
		496	X_UNLOCK (reqlock);
457		497
458	if (req->type == EIO_GROUP && req->size)	498	if (expect_false (req->type == EIO_GROUP && req->size))
459	{	499	{
460	req->int1 = 1; /* mark request as delayed */	500	req->int1 = 1; /* mark request as delayed */
461	continue;	501	continue;
462	}	502	}
463	else	503	else
464	{	504	{
465	int res = eio_finish (req);	505	int res = ETP_FINISH (req);
466	if (res)	506	if (expect_false (res))
467	return res;	507	return res;
468	}	508	}
469		509
470	if (maxreqs && !--maxreqs)	510	if (expect_false (maxreqs && !--maxreqs))
471	break;	511	break;
472		512
473	if (max_poll_time)	513	if (maxtime)
474	{	514	{
475	gettimeofday (&tv_now, 0);	515	gettimeofday (&tv_now, 0);
476		516
477	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	517	if (tvdiff (&tv_start, &tv_now) >= maxtime)
478	break;	518	break;
479	}	519	}
480	}	520	}
481		521
482	errno = EAGAIN;	522	errno = EAGAIN;
483	return -1;	523	return -1;
484	}	524	}
485		525
		526	static void etp_cancel (ETP_REQ *req)
		527	{
		528	X_LOCK (wrklock);
		529	req->flags |= EIO_FLAG_CANCELLED;
		530	X_UNLOCK (wrklock);
		531
		532	eio_grp_cancel (req);
		533	}
		534
		535	static void etp_submit (ETP_REQ *req)
		536	{
		537	req->pri -= ETP_PRI_MIN;
		538
		539	if (expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
		540	if (expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		541
		542	if (expect_false (req->type == EIO_GROUP))
		543	{
		544	/* I hope this is worth it :/ */
		545	X_LOCK (reqlock);
		546	++nreqs;
		547	X_UNLOCK (reqlock);
		548
		549	X_LOCK (reslock);
		550
		551	++npending;
		552
		553	if (!reqq_push (&res_queue, req) && want_poll_cb)
		554	want_poll_cb ();
		555
		556	X_UNLOCK (reslock);
		557	}
		558	else
		559	{
		560	X_LOCK (reqlock);
		561	++nreqs;
		562	++nready;
		563	reqq_push (&req_queue, req);
		564	X_COND_SIGNAL (reqwait);
		565	X_UNLOCK (reqlock);
		566
		567	etp_maybe_start_thread ();
		568	}
		569	}
		570
		571	static void etp_set_max_poll_time (double nseconds)
		572	{
		573	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		574	max_poll_time = nseconds;
		575	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		576	}
		577
		578	static void etp_set_max_poll_reqs (unsigned int maxreqs)
		579	{
		580	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		581	max_poll_reqs = maxreqs;
		582	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		583	}
		584
		585	static void etp_set_max_idle (unsigned int nthreads)
		586	{
		587	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		588	max_idle = nthreads <= 0 ? 1 : nthreads;
		589	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		590	}
		591
		592	static void etp_set_min_parallel (unsigned int nthreads)
		593	{
		594	if (wanted < nthreads)
		595	wanted = nthreads;
		596	}
		597
		598	static void etp_set_max_parallel (unsigned int nthreads)
		599	{
		600	if (wanted > nthreads)
		601	wanted = nthreads;
		602
		603	while (started > wanted)
		604	etp_end_thread ();
		605	}
		606
		607	/*****************************************************************************/
		608
		609	static void grp_try_feed (eio_req *grp)
		610	{
		611	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
		612	{
		613	grp->flags &= ~EIO_FLAG_GROUPADD;
		614
		615	EIO_FEED (grp);
		616
		617	/* stop if no progress has been made */
		618	if (!(grp->flags & EIO_FLAG_GROUPADD))
		619	{
		620	grp->feed = 0;
		621	break;
		622	}
		623	}
		624	}
		625
		626	static int grp_dec (eio_req *grp)
		627	{
		628	--grp->size;
		629
		630	/* call feeder, if applicable */
		631	grp_try_feed (grp);
		632
		633	/* finish, if done */
		634	if (!grp->size && grp->int1)
		635	return eio_finish (grp);
		636	else
		637	return 0;
		638	}
		639
		640	void eio_destroy (eio_req *req)
		641	{
		642	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
		643	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
		644
		645	EIO_DESTROY (req);
		646	}
		647
		648	static int eio_finish (eio_req *req)
		649	{
		650	int res = EIO_FINISH (req);
		651
		652	if (req->grp)
		653	{
		654	int res2;
		655	eio_req *grp = req->grp;
		656
		657	/* unlink request */
		658	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		659	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		660
		661	if (grp->grp_first == req)
		662	grp->grp_first = req->grp_next;
		663
		664	res2 = grp_dec (grp);
		665
		666	if (!res && res2)
		667	res = res2;
		668	}
		669
		670	eio_destroy (req);
		671
		672	return res;
		673	}
		674
		675	void eio_grp_cancel (eio_req *grp)
		676	{
		677	for (grp = grp->grp_first; grp; grp = grp->grp_next)
		678	eio_cancel (grp);
		679	}
		680
		681	void eio_cancel (eio_req *req)
		682	{
		683	etp_cancel (req);
		684	}
		685
		686	void eio_submit (eio_req *req)
		687	{
		688	etp_submit (req);
		689	}
		690
		691	unsigned int eio_nreqs (void)
		692	{
		693	return etp_nreqs ();
		694	}
		695
		696	unsigned int eio_nready (void)
		697	{
		698	return etp_nready ();
		699	}
		700
		701	unsigned int eio_npending (void)
		702	{
		703	return etp_npending ();
		704	}
		705
		706	unsigned int eio_nthreads (void)
		707	{
		708	return etp_nthreads ();
		709	}
		710
		711	void eio_set_max_poll_time (double nseconds)
		712	{
		713	etp_set_max_poll_time (nseconds);
		714	}
		715
		716	void eio_set_max_poll_reqs (unsigned int maxreqs)
		717	{
		718	etp_set_max_poll_reqs (maxreqs);
		719	}
		720
		721	void eio_set_max_idle (unsigned int nthreads)
		722	{
		723	etp_set_max_idle (nthreads);
		724	}
		725
		726	void eio_set_min_parallel (unsigned int nthreads)
		727	{
		728	etp_set_min_parallel (nthreads);
		729	}
		730
		731	void eio_set_max_parallel (unsigned int nthreads)
		732	{
		733	etp_set_max_parallel (nthreads);
		734	}
		735
		736	int eio_poll (void)
		737	{
		738	return etp_poll ();
		739	}
		740
486	/*****************************************************************************/	741	/*****************************************************************************/
487	/* work around various missing functions */	742	/* work around various missing functions */
488		743
489	#if !HAVE_PREADWRITE	744	#if !HAVE_PREADWRITE
		745	# undef pread
		746	# undef pwrite
490	# define pread aio_pread	747	# define pread eio__pread
491	# define pwrite aio_pwrite	748	# define pwrite eio__pwrite
492		749
493	/*	750	static ssize_t
494	* make our pread/pwrite safe against themselves, but not against	751	eio__pread (int fd, void *buf, size_t count, off_t offset)
495	* normal read/write by using a mutex. slows down execution a lot,
496	* but that's your problem, not mine.
497	*/
498	static mutex_t preadwritelock = X_MUTEX_INIT;
499
500	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
501	{	752	{
502	ssize_t res;	753	ssize_t res;
503	off_t ooffset;	754	off_t ooffset;
504		755
505	X_LOCK (preadwritelock);	756	X_LOCK (preadwritelock);
…		…
510	X_UNLOCK (preadwritelock);	761	X_UNLOCK (preadwritelock);
511		762
512	return res;	763	return res;
513	}	764	}
514		765
515	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	766	static ssize_t
		767	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
516	{	768	{
517	ssize_t res;	769	ssize_t res;
518	off_t ooffset;	770	off_t ooffset;
519		771
520	X_LOCK (preadwritelock);	772	X_LOCK (preadwritelock);
521	ooffset = lseek (fd, 0, SEEK_CUR);	773	ooffset = lseek (fd, 0, SEEK_CUR);
522	lseek (fd, offset, SEEK_SET);	774	lseek (fd, offset, SEEK_SET);
523	res = write (fd, buf, count);	775	res = write (fd, buf, count);
524	lseek (fd, offset, SEEK_SET);	776	lseek (fd, ooffset, SEEK_SET);
525	X_UNLOCK (preadwritelock);	777	X_UNLOCK (preadwritelock);
526		778
527	return res;	779	return res;
528	}	780	}
529	#endif	781	#endif
530		782
531	#ifndef HAVE_FUTIMES	783	#ifndef HAVE_FUTIMES
532		784
		785	# undef utimes
		786	# undef futimes
533	# define utimes(path,times) aio_utimes (path, times)	787	# define utimes(path,times) eio__utimes (path, times)
534	# define futimes(fd,times) aio_futimes (fd, times)	788	# define futimes(fd,times) eio__futimes (fd, times)
535		789
		790	static int
536	static int aio_utimes (const char *filename, const struct timeval times[2])	791	eio__utimes (const char *filename, const struct timeval times[2])
537	{	792	{
538	if (times)	793	if (times)
539	{	794	{
540	struct utimbuf buf;	795	struct utimbuf buf;
541		796
…		…
546	}	801	}
547	else	802	else
548	return utime (filename, 0);	803	return utime (filename, 0);
549	}	804	}
550		805
551	static int aio_futimes (int fd, const struct timeval tv[2])	806	static int eio__futimes (int fd, const struct timeval tv[2])
552	{	807	{
553	errno = ENOSYS;	808	errno = ENOSYS;
554	return -1;	809	return -1;
555	}	810	}
556		811
557	#endif	812	#endif
558		813
559	#if !HAVE_FDATASYNC	814	#if !HAVE_FDATASYNC
		815	# undef fdatasync
560	# define fdatasync fsync	816	# define fdatasync(fd) fsync (fd)
561	#endif	817	#endif
		818
		819	/* sync_file_range always needs emulation */
		820	int
		821	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
		822	{
		823	#if HAVE_SYNC_FILE_RANGE
		824	int res;
		825
		826	if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
		827	|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
		828	|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
		829	{
		830	flags = 0
		831	| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
		832	| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
		833	| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
		834	}
		835
		836	res = sync_file_range (fd, offset, nbytes, flags);
		837
		838	if (!res || errno != ENOSYS)
		839	return res;
		840	#endif
		841
		842	/* even though we could play tricks with the flags, it's better to always
		843	* call fdatasync, as thta matches the expectation of it's users best */
		844	return fdatasync (fd);
		845	}
562		846
563	#if !HAVE_READAHEAD	847	#if !HAVE_READAHEAD
		848	# undef readahead
564	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	849	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
565		850
		851	static ssize_t
566	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	852	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
567	{	853	{
568	size_t todo = count;	854	size_t todo = count;
569	dBUF;	855	dBUF;
570		856
571	while (todo > 0)	857	while (todo > 0)
…		…
581	return count;	867	return count;
582	}	868	}
583		869
584	#endif	870	#endif
585		871
586	#if !HAVE_READDIR_R
587	# define readdir_r aio_readdir_r
588
589	static mutex_t readdirlock = X_MUTEX_INIT;
590
591	static int readdir_r (DIR *dirp, EIO_STRUCT_DIRENT *ent, EIO_STRUCT_DIRENT **res)
592	{
593	EIO_STRUCT_DIRENT *e;
594	int errorno;
595
596	X_LOCK (readdirlock);
597
598	e = readdir (dirp);
599	errorno = errno;
600
601	if (e)
602	{
603	*res = ent;
604	strcpy (ent->d_name, e->d_name);
605	}
606	else
607	*res = 0;
608
609	X_UNLOCK (readdirlock);
610
611	errno = errorno;
612	return e ? 0 : -1;
613	}
614	#endif
615
616	/* sendfile always needs emulation */	872	/* sendfile always needs emulation */
		873	static ssize_t
617	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	874	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
618	{	875	{
619	ssize_t res;	876	ssize_t res;
620		877
621	if (!count)	878	if (!count)
622	return 0;	879	return 0;
…		…
705		962
706	return res;	963	return res;
707	}	964	}
708		965
709	/* read a full directory */	966	/* read a full directory */
		967	static void
710	static void scandir_ (eio_req *req, worker *self)	968	eio__scandir (eio_req *req, etp_worker *self)
711	{	969	{
712	DIR *dirp;	970	DIR *dirp;
713	union
714	{
715	EIO_STRUCT_DIRENT d;
716	char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1];
717	} *u;
718	EIO_STRUCT_DIRENT *entp;	971	EIO_STRUCT_DIRENT *entp;
719	char *name, *names;	972	char *name, *names;
720	int memlen = 4096;	973	int memlen = 4096;
721	int memofs = 0;	974	int memofs = 0;
722	int res = 0;	975	int res = 0;
723		976
724	X_LOCK (wrklock);	977	X_LOCK (wrklock);
		978	/* the corresponding closedir is in ETP_WORKER_CLEAR */
725	self->dirp = dirp = opendir (req->ptr1);	979	self->dirp = dirp = opendir (req->ptr1);
726	self->dbuf = u = malloc (sizeof (*u));
727	req->flags |= EIO_FLAG_PTR2_FREE;	980	req->flags |= EIO_FLAG_PTR2_FREE;
728	req->ptr2 = names = malloc (memlen);	981	req->ptr2 = names = malloc (memlen);
729	X_UNLOCK (wrklock);	982	X_UNLOCK (wrklock);
730		983
731	if (dirp && u && names)	984	if (dirp && names)
732	for (;;)	985	for (;;)
733	{	986	{
734	errno = 0;	987	errno = 0;
735	readdir_r (dirp, &u->d, &entp);	988	entp = readdir (dirp);
736		989
737	if (!entp)	990	if (!entp)
738	break;	991	break;
739		992
740	name = entp->d_name;	993	name = entp->d_name;
…		…
765	res = -1;	1018	res = -1;
766		1019
767	req->result = res;	1020	req->result = res;
768	}	1021	}
769		1022
		1023	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1024	# undef msync
		1025	# define msync(a,b,c) ((errno = ENOSYS), -1)
		1026	#endif
		1027
		1028	int
		1029	eio__mtouch (void *mem, size_t len, int flags)
		1030	{
		1031	intptr_t addr = (intptr_t)mem;
		1032	intptr_t end = addr + len;
		1033	#ifdef PAGESIZE
		1034	const intptr_t page = PAGESIZE;
		1035	#else
		1036	static intptr_t page;
		1037
		1038	if (!page)
		1039	page = sysconf (_SC_PAGESIZE);
		1040	#endif
		1041
		1042	addr &= ~(page - 1); /* assume page size is always a power of two */
		1043
		1044	if (addr < end)
		1045	if (flags) /* modify */
		1046	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len);
		1047	else
		1048	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len);
		1049
		1050	return 0;
		1051	}
		1052
770	/*****************************************************************************/	1053	/*****************************************************************************/
771		1054
772	#define ALLOC(len) \	1055	#define ALLOC(len) \
773	X_LOCK (wrklock); \
774	req->flags |= EIO_FLAG_PTR2_FREE; \
775	X_UNLOCK (wrklock); \
776	req->ptr2 = malloc (len); \
777	if (!req->ptr2) \	1056	if (!req->ptr2) \
778	{ \	1057	{ \
		1058	X_LOCK (wrklock); \
		1059	req->flags |= EIO_FLAG_PTR2_FREE; \
		1060	X_UNLOCK (wrklock); \
		1061	req->ptr2 = malloc (len); \
		1062	if (!req->ptr2) \
		1063	{ \
779	errno = ENOMEM; \	1064	errno = ENOMEM; \
780	req->result = -1; \	1065	req->result = -1; \
781	break; \	1066	break; \
		1067	} \
782	}	1068	}
783		1069
784	X_THREAD_PROC (eio_proc)	1070	X_THREAD_PROC (etp_proc)
785	{	1071	{
786	eio_req *req;	1072	ETP_REQ *req;
787	struct timespec ts;	1073	struct timespec ts;
788	worker *self = (worker *)thr_arg;	1074	etp_worker *self = (etp_worker *)thr_arg;
789		1075
790	/* try to distribute timeouts somewhat randomly */	1076	/* try to distribute timeouts somewhat randomly */
791	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1077	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
792		1078
793	for (;;)	1079	for (;;)
794	{	1080	{
795	ts.tv_sec = time (0) + IDLE_TIMEOUT;
796
797	X_LOCK (reqlock);	1081	X_LOCK (reqlock);
798		1082
799	for (;;)	1083	for (;;)
800	{	1084	{
801	self->req = req = reqq_shift (&req_queue);	1085	self->req = req = reqq_shift (&req_queue);
…		…
803	if (req)	1087	if (req)
804	break;	1088	break;
805		1089
806	++idle;	1090	++idle;
807		1091
		1092	ts.tv_sec = time (0) + IDLE_TIMEOUT;
808	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1093	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
809	{	1094	{
810	if (idle > max_idle)	1095	if (idle > max_idle)
811	{	1096	{
812	--idle;	1097	--idle;
…		…
817	goto quit;	1102	goto quit;
818	}	1103	}
819		1104
820	/* we are allowed to idle, so do so without any timeout */	1105	/* we are allowed to idle, so do so without any timeout */
821	X_COND_WAIT (reqwait, reqlock);	1106	X_COND_WAIT (reqwait, reqlock);
822	ts.tv_sec = time (0) + IDLE_TIMEOUT;
823	}	1107	}
824		1108
825	--idle;	1109	--idle;
826	}	1110	}
827		1111
828	--nready;	1112	--nready;
829		1113
830	X_UNLOCK (reqlock);	1114	X_UNLOCK (reqlock);
831		1115
832	errno = 0; /* strictly unnecessary */	1116	if (req->type < 0)
		1117	goto quit;
833		1118
834	if (!EIO_CANCELLED (req))	1119	if (!EIO_CANCELLED (req))
835	switch (req->type)	1120	ETP_EXECUTE (self, req);
836	{
837	case EIO_READ: req->result = req->offs >= 0
838	? pread (req->int1, req->ptr2, req->size, req->offs)
839	: read (req->int1, req->ptr2, req->size); break;
840	case EIO_WRITE: req->result = req->offs >= 0
841	? pwrite (req->int1, req->ptr2, req->size, req->offs)
842	: write (req->int1, req->ptr2, req->size); break;
843
844	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
845	case EIO_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
846
847	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
848	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
849	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
850	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
851	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
852	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
853
854	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
855	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
856	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
857	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
858	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
859	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
860
861	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
862	case EIO_CLOSE: req->result = close (req->int1); break;
863	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
864	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
865	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
866	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
867	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
868	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
869	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
870	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break;
871	case EIO_READLINK: ALLOC (NAME_MAX);
872	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
873
874	case EIO_SYNC: req->result = 0; sync (); break;
875	case EIO_FSYNC: req->result = fsync (req->int1); break;
876	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
877
878	case EIO_READDIR: scandir_ (req, self); break;
879
880	case EIO_BUSY:
881	#ifdef _WIN32
882	Sleep (req->nv1 * 1000.);
883	#else
884	{
885	struct timeval tv;
886
887	tv.tv_sec = req->nv1;
888	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
889
890	req->result = select (0, 0, 0, 0, &tv);
891	}
892	#endif
893	break;
894
895	case EIO_UTIME:
896	case EIO_FUTIME:
897	{
898	struct timeval tv[2];
899	struct timeval *times;
900
901	if (req->nv1 != -1. || req->nv2 != -1.)
902	{
903	tv[0].tv_sec = req->nv1;
904	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
905	tv[1].tv_sec = req->nv2;
906	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
907
908	times = tv;
909	}
910	else
911	times = 0;
912
913
914	req->result = req->type == EIO_FUTIME
915	? futimes (req->int1, times)
916	: utimes (req->ptr1, times);
917	}
918
919	case EIO_GROUP:
920	case EIO_NOP:
921	break;
922
923	case EIO_QUIT:
924	goto quit;
925
926	default:
927	req->result = -1;
928	break;
929	}
930
931	req->errorno = errno;
932		1121
933	X_LOCK (reslock);	1122	X_LOCK (reslock);
934		1123
935	++npending;	1124	++npending;
936		1125
937	if (!reqq_push (&res_queue, req) && want_poll_cb)	1126	if (!reqq_push (&res_queue, req) && want_poll_cb)
938	want_poll_cb ();	1127	want_poll_cb ();
939		1128
940	self->req = 0;	1129	self->req = 0;
941	worker_clear (self);	1130	etp_worker_clear (self);
942		1131
943	X_UNLOCK (reslock);	1132	X_UNLOCK (reslock);
944	}	1133	}
945		1134
946	quit:	1135	quit:
947	X_LOCK (wrklock);	1136	X_LOCK (wrklock);
948	worker_free (self);	1137	etp_worker_free (self);
949	X_UNLOCK (wrklock);	1138	X_UNLOCK (wrklock);
950		1139
951	return 0;	1140	return 0;
952	}	1141	}
953		1142
954	/*****************************************************************************/	1143	/*****************************************************************************/
955		1144
956	static void eio_atfork_prepare (void)
957	{
958	X_LOCK (wrklock);
959	X_LOCK (reqlock);
960	X_LOCK (reslock);
961	#if !HAVE_PREADWRITE
962	X_LOCK (preadwritelock);
963	#endif
964	#if !HAVE_READDIR_R
965	X_LOCK (readdirlock);
966	#endif
967	}
968
969	static void eio_atfork_parent (void)
970	{
971	#if !HAVE_READDIR_R
972	X_UNLOCK (readdirlock);
973	#endif
974	#if !HAVE_PREADWRITE
975	X_UNLOCK (preadwritelock);
976	#endif
977	X_UNLOCK (reslock);
978	X_UNLOCK (reqlock);
979	X_UNLOCK (wrklock);
980	}
981
982	static void eio_atfork_child (void)
983	{
984	eio_req *prv;
985
986	while (prv = reqq_shift (&req_queue))
987	eio_destroy (prv);
988
989	while (prv = reqq_shift (&res_queue))
990	eio_destroy (prv);
991
992	while (wrk_first.next != &wrk_first)
993	{
994	worker *wrk = wrk_first.next;
995
996	if (wrk->req)
997	eio_destroy (wrk->req);
998
999	worker_clear (wrk);
1000	worker_free (wrk);
1001	}
1002
1003	started = 0;
1004	idle = 0;
1005	nreqs = 0;
1006	nready = 0;
1007	npending = 0;
1008
1009	eio_atfork_parent ();
1010	}
1011
1012	int eio_init (void (*want_poll)(void), void (*done_poll)(void))	1145	int eio_init (void (*want_poll)(void), void (*done_poll)(void))
1013	{	1146	{
1014	want_poll_cb = want_poll;	1147	return etp_init (want_poll, done_poll);
1015	done_poll_cb = done_poll;
1016
1017	#ifdef _WIN32
1018	X_MUTEX_CHECK (wrklock);
1019	X_MUTEX_CHECK (reslock);
1020	X_MUTEX_CHECK (reqlock);
1021	X_MUTEX_CHECK (reqwait);
1022	X_MUTEX_CHECK (preadwritelock);
1023	X_MUTEX_CHECK (readdirlock);
1024
1025	X_COND_CHECK (reqwait);
1026	#endif
1027
1028	X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child);
1029	}	1148	}
1030		1149
1031	static void eio_api_destroy (eio_req *req)	1150	static void eio_api_destroy (eio_req *req)
1032	{	1151	{
1033	free (req);	1152	free (req);
…		…
1038	\	1157	\
1039	req = (eio_req *)calloc (1, sizeof *req); \	1158	req = (eio_req *)calloc (1, sizeof *req); \
1040	if (!req) \	1159	if (!req) \
1041	return 0; \	1160	return 0; \
1042	\	1161	\
1043	req->type = EIO_ ## rtype; \	1162	req->type = rtype; \
1044	req->pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \	1163	req->pri = pri; \
1045	req->finish = cb; \	1164	req->finish = cb; \
		1165	req->data = data; \
1046	req->destroy = eio_api_destroy;	1166	req->destroy = eio_api_destroy;
1047		1167
1048	#define SEND eio_submit (req); return req	1168	#define SEND eio_submit (req); return req
1049		1169
1050	#define PATH (void)0	1170	#define PATH \
		1171	req->flags |= EIO_FLAG_PTR1_FREE; \
		1172	req->ptr1 = strdup (path); \
		1173	if (!req->ptr1) \
		1174	{ \
		1175	eio_api_destroy (req); \
		1176	return 0; \
		1177	}
1051		1178
		1179	static void eio_execute (etp_worker *self, eio_req *req)
		1180	{
		1181	errno = 0;
		1182
		1183	switch (req->type)
		1184	{
		1185	case EIO_READ: ALLOC (req->size);
		1186	req->result = req->offs >= 0
		1187	? pread (req->int1, req->ptr2, req->size, req->offs)
		1188	: read (req->int1, req->ptr2, req->size); break;
		1189	case EIO_WRITE: req->result = req->offs >= 0
		1190	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		1191	: write (req->int1, req->ptr2, req->size); break;
		1192
		1193	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1194	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
		1195
		1196	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1197	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1198	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1199	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1200	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1201	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1202
		1203	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1204	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1205	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
		1206	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
		1207	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1208	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		1209
		1210	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
		1211	case EIO_CLOSE: req->result = close (req->int1); break;
		1212	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		1213	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		1214	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		1215	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		1216	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		1217	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		1218	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		1219	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->int3); break;
		1220
		1221	case EIO_READLINK: ALLOC (NAME_MAX);
		1222	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
		1223
		1224	case EIO_SYNC: req->result = 0; sync (); break;
		1225	case EIO_FSYNC: req->result = fsync (req->int1); break;
		1226	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		1227	case EIO_MSYNC: req->result = msync (req->ptr2, req->size, req->int1); break;
		1228	case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break;
		1229	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		1230
		1231	case EIO_READDIR: eio__scandir (req, self); break;
		1232
		1233	case EIO_BUSY:
		1234	#ifdef _WIN32
		1235	Sleep (req->nv1 * 1000.);
		1236	#else
		1237	{
		1238	struct timeval tv;
		1239
		1240	tv.tv_sec = req->nv1;
		1241	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
		1242
		1243	req->result = select (0, 0, 0, 0, &tv);
		1244	}
		1245	#endif
		1246	break;
		1247
		1248	case EIO_UTIME:
		1249	case EIO_FUTIME:
		1250	{
		1251	struct timeval tv[2];
		1252	struct timeval *times;
		1253
		1254	if (req->nv1 != -1. || req->nv2 != -1.)
		1255	{
		1256	tv[0].tv_sec = req->nv1;
		1257	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1258	tv[1].tv_sec = req->nv2;
		1259	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1260
		1261	times = tv;
		1262	}
		1263	else
		1264	times = 0;
		1265
		1266
		1267	req->result = req->type == EIO_FUTIME
		1268	? futimes (req->int1, times)
		1269	: utimes (req->ptr1, times);
		1270	}
		1271	break;
		1272
		1273	case EIO_GROUP:
		1274	abort (); /* handled in eio_request */
		1275
		1276	case EIO_NOP:
		1277	req->result = 0;
		1278	break;
		1279
		1280	case EIO_CUSTOM:
		1281	((void (*)(eio_req *))req->feed) (req);
		1282	break;
		1283
		1284	default:
		1285	req->result = -1;
		1286	break;
		1287	}
		1288
		1289	req->errorno = errno;
		1290	}
		1291
		1292	#ifndef EIO_NO_WRAPPERS
		1293
		1294	eio_req *eio_nop (int pri, eio_cb cb, void *data)
		1295	{
		1296	REQ (EIO_NOP); SEND;
		1297	}
		1298
		1299	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
		1300	{
		1301	REQ (EIO_BUSY); req->nv1 = delay; SEND;
		1302	}
		1303
1052	eio_req *eio_fsync (int fd, eio_cb cb)	1304	eio_req *eio_sync (int pri, eio_cb cb, void *data)
1053	{	1305	{
		1306	REQ (EIO_SYNC); SEND;
		1307	}
		1308
		1309	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		1310	{
1054	REQ (FSYNC); req->int1 = fd; SEND;	1311	REQ (EIO_FSYNC); req->int1 = fd; SEND;
1055	}	1312	}
1056		1313
		1314	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1315	{
		1316	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1317	}
		1318
		1319	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1320	{
		1321	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1322	}
		1323
		1324	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		1325	{
		1326	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		1327	}
		1328
1057	eio_req *eio_fdatasync (int fd, eio_cb cb)	1329	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1058	{	1330	{
1059	REQ (FDATASYNC); req->int1 = fd; SEND;	1331	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1060	}	1332	}
1061		1333
		1334	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		1335	{
		1336	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		1337	}
		1338
1062	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb)	1339	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
1063	{	1340	{
1064	REQ (READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;	1341	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
1065	}	1342	}
1066		1343
1067	eio_req *eio_read (int fd, off_t offset, size_t length, void *data, eio_cb cb)	1344	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1068	{	1345	{
1069	REQ (READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	1346	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1070	}	1347	}
1071		1348
1072	eio_req *eio_write (int fd, off_t offset, size_t length, void *data, eio_cb cb)	1349	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1073	{	1350	{
1074	REQ (WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	1351	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1075	}	1352	}
1076		1353
1077	eio_req *eio_fstat (int fd, eio_cb cb)	1354	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
1078	{	1355	{
1079	REQ (FSTAT); req->int1 = fd; SEND;	1356	REQ (EIO_FSTAT); req->int1 = fd; SEND;
1080	}	1357	}
1081		1358
1082	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb)	1359	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
1083	{	1360	{
1084	REQ (FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;	1361	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
1085	}	1362	}
1086		1363
1087	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb)	1364	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
1088	{	1365	{
1089	REQ (FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;	1366	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
1090	}	1367	}
1091		1368
1092	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb)	1369	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
1093	{	1370	{
1094	REQ (FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;	1371	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1095	}	1372	}
1096		1373
1097	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb)	1374	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
1098	{	1375	{
1099	REQ (FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	1376	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1100	}	1377	}
1101		1378
1102	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb)	1379	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
1103	{	1380	{
1104	REQ (DUP2); req->int1 = fd; req->int2 = fd2; SEND;	1381	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
1105	}	1382	}
1106		1383
1107	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb)	1384	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data)
1108	{	1385	{
1109	REQ (SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;	1386	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
1110	}	1387	}
1111		1388
1112	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb)	1389	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
1113	{	1390	{
1114	REQ (OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;	1391	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
1115	}	1392	}
1116		1393
1117	eio_req *eio_readlink (const char *path, eio_cb cb)
1118	{
1119	REQ (READLINK); PATH; SEND;
1120	}
1121
1122	eio_req *eio_stat (const char *path, eio_cb cb)
1123	{
1124	REQ (STAT); PATH; SEND;
1125	}
1126
1127	eio_req *eio_lstat (const char *path, eio_cb cb)
1128	{
1129	REQ (LSTAT); PATH; SEND;
1130	}
1131
1132	eio_req *eio_utime (const char *path, double atime, double mtime, eio_cb cb)	1394	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
1133	{	1395	{
1134	REQ (UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;	1396	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
1135	}	1397	}
1136		1398
1137	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb)	1399	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
1138	{	1400	{
1139	REQ (TRUNCATE); PATH; req->offs = offset; SEND;	1401	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1140	}	1402	}
1141		1403
1142	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb)	1404	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
1143	{	1405	{
1144	REQ (CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	1406	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1145	}	1407	}
1146		1408
1147	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb)	1409	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1148	{	1410	{
1149	REQ (CHMOD); PATH; req->int2 = (long)mode; SEND;	1411	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
1150	}	1412	}
1151		1413
1152	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb)	1414	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1153	{	1415	{
1154	REQ (MKDIR); PATH; req->int2 = (long)mode; SEND;	1416	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
1155	}	1417	}
1156		1418
1157	eio_req *eio_unlink (const char *path, eio_cb cb)	1419	static eio_req *
		1420	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
1158	{	1421	{
1159	REQ (UNLINK); PATH; SEND;
1160	}
1161
1162	eio_req *eio_rmdir (const char *path, eio_cb cb)
1163	{
1164	REQ (RMDIR); PATH; SEND;	1422	REQ (type); PATH; SEND;
1165	}	1423	}
1166		1424
		1425	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		1426	{
		1427	return eio__1path (EIO_READLINK, path, pri, cb, data);
		1428	}
		1429
		1430	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		1431	{
		1432	return eio__1path (EIO_STAT, path, pri, cb, data);
		1433	}
		1434
		1435	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		1436	{
		1437	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		1438	}
		1439
		1440	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		1441	{
		1442	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		1443	}
		1444
		1445	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
		1446	{
		1447	return eio__1path (EIO_RMDIR, path, pri, cb, data);
		1448	}
		1449
1167	eio_req *eio_readdir (const char *path, eio_cb cb)	1450	eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data)
1168	{	1451	{
1169	REQ (READDIR); PATH; SEND;	1452	return eio__1path (EIO_READDIR, path, pri, cb, data);
1170	}	1453	}
1171		1454
1172	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb)	1455	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1173	{	1456	{
1174	REQ (MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND;	1457	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND;
1175	}	1458	}
1176		1459
1177	eio_req *eio_busy (double delay, eio_cb cb)	1460	static eio_req *
		1461	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1178	{	1462	{
1179	REQ (BUSY); req->nv1 = delay; SEND;	1463	REQ (type); PATH;
1180	}
1181		1464
		1465	req->flags |= EIO_FLAG_PTR2_FREE;
		1466	req->ptr2 = strdup (new_path);
		1467	if (!req->ptr2)
		1468	{
		1469	eio_api_destroy (req);
		1470	return 0;
		1471	}
		1472
		1473	SEND;
		1474	}
		1475
		1476	eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1477	{
		1478	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
		1479	}
		1480
		1481	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1482	{
		1483	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
		1484	}
		1485
		1486	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1487	{
		1488	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
		1489	}
		1490
		1491	eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data)
		1492	{
		1493	REQ (EIO_CUSTOM); req->feed = (void (*)(eio_req *))execute; SEND;
		1494	}
		1495
		1496	#endif
		1497
1182	eio_req *eio_nop (eio_cb cb)	1498	eio_req *eio_grp (eio_cb cb, void *data)
1183	{	1499	{
		1500	const int pri = EIO_PRI_MAX;
		1501
1184	REQ (NOP); SEND;	1502	REQ (EIO_GROUP); SEND;
1185	}	1503	}
1186		1504
1187	#undef REQ	1505	#undef REQ
1188	#undef PATH	1506	#undef PATH
1189	#undef SEND	1507	#undef SEND
1190		1508
1191	#if 0	1509	/*****************************************************************************/
1192		1510	/* grp functions */
1193	void
1194	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1195	PROTOTYPE: $$$;$
1196	PPCODE:
1197	{
1198	dREQ;
1199
1200	req->type = EIO_OPEN;
1201	req->sv1 = newSVsv (pathname);
1202	req->ptr1 = SvPVbyte_nolen (req->sv1);
1203	req->int1 = flags;
1204	req->int2 = mode;
1205
1206	EIO_SEND;
1207	}
1208
1209	void
1210	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1211	PROTOTYPE: $;$
1212	ALIAS:
1213	aio_fsync = EIO_FSYNC
1214	aio_fdatasync = EIO_FDATASYNC
1215	PPCODE:
1216	{
1217	dREQ;
1218
1219	req->type = ix;
1220	req->sv1 = newSVsv (fh);
1221	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1222
1223	EIO_SEND (req);
1224	}
1225
1226	void
1227	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1228	PROTOTYPE: $;$
1229	PPCODE:
1230	{
1231	dREQ;
1232
1233	req->type = EIO_CLOSE;
1234	req->sv1 = newSVsv (fh);
1235	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1236
1237	EIO_SEND (req);
1238	}
1239
1240	void
1241	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1242	ALIAS:
1243	aio_read = EIO_READ
1244	aio_write = EIO_WRITE
1245	PROTOTYPE: $$$$$;$
1246	PPCODE:
1247	{
1248	STRLEN svlen;
1249	char *svptr = SvPVbyte (data, svlen);
1250	UV len = SvUV (length);
1251
1252	SvUPGRADE (data, SVt_PV);
1253	SvPOK_on (data);
1254
1255	if (dataoffset < 0)
1256	dataoffset += svlen;
1257
1258	if (dataoffset < 0 || dataoffset > svlen)
1259	croak ("dataoffset outside of data scalar");
1260
1261	if (ix == EIO_WRITE)
1262	{
1263	/* write: check length and adjust. */
1264	if (!SvOK (length) || len + dataoffset > svlen)
1265	len = svlen - dataoffset;
1266	}
1267	else
1268	{
1269	/* read: grow scalar as necessary */
1270	svptr = SvGROW (data, len + dataoffset + 1);
1271	}
1272
1273	if (len < 0)
1274	croak ("length must not be negative");
1275
1276	{
1277	dREQ;
1278
1279	req->type = ix;
1280	req->sv1 = newSVsv (fh);
1281	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1282	: IoOFP (sv_2io (fh)));
1283	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1284	req->size = len;
1285	req->sv2 = SvREFCNT_inc (data);
1286	req->ptr2 = (char *)svptr + dataoffset;
1287	req->stroffset = dataoffset;
1288
1289	if (!SvREADONLY (data))
1290	{
1291	SvREADONLY_on (data);
1292	req->flags |= FLAG_SV2_RO_OFF;
1293	}
1294
1295	EIO_SEND;
1296	}
1297	}
1298
1299	void
1300	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1301	PROTOTYPE: $$;$
1302	PPCODE:
1303	{
1304	SV *data;
1305	dREQ;
1306
1307	data = newSV (NAME_MAX);
1308	SvPOK_on (data);
1309
1310	req->type = EIO_READLINK;
1311	req->sv1 = newSVsv (path);
1312	req->ptr1 = SvPVbyte_nolen (req->sv1);
1313	req->sv2 = data;
1314	req->ptr2 = SvPVbyte_nolen (data);
1315
1316	EIO_SEND;
1317	}
1318
1319	void
1320	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1321	PROTOTYPE: $$$$;$
1322	PPCODE:
1323	{
1324	dREQ;
1325
1326	req->type = EIO_SENDFILE;
1327	req->sv1 = newSVsv (out_fh);
1328	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1329	req->sv2 = newSVsv (in_fh);
1330	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1331	req->offs = SvVAL64 (in_offset);
1332	req->size = length;
1333
1334	EIO_SEND;
1335	}
1336
1337	void
1338	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1339	PROTOTYPE: $$$;$
1340	PPCODE:
1341	{
1342	dREQ;
1343
1344	req->type = EIO_READAHEAD;
1345	req->sv1 = newSVsv (fh);
1346	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1347	req->offs = SvVAL64 (offset);
1348	req->size = length;
1349
1350	EIO_SEND;
1351	}
1352
1353	void
1354	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1355	ALIAS:
1356	aio_stat = EIO_STAT
1357	aio_lstat = EIO_LSTAT
1358	PPCODE:
1359	{
1360	dREQ;
1361
1362	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1363	if (!req->ptr2)
1364	{
1365	req_destroy (req);
1366	croak ("out of memory during aio_stat statdata allocation");
1367	}
1368
1369	req->flags |= FLAG_PTR2_FREE;
1370	req->sv1 = newSVsv (fh_or_path);
1371
1372	if (SvPOK (fh_or_path))
1373	{
1374	req->type = ix;
1375	req->ptr1 = SvPVbyte_nolen (req->sv1);
1376	}
1377	else
1378	{
1379	req->type = EIO_FSTAT;
1380	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1381	}
1382
1383	EIO_SEND;
1384	}
1385
1386	void
1387	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
1388	PPCODE:
1389	{
1390	dREQ;
1391
1392	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1393	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1394	req->sv1 = newSVsv (fh_or_path);
1395
1396	if (SvPOK (fh_or_path))
1397	{
1398	req->type = EIO_UTIME;
1399	req->ptr1 = SvPVbyte_nolen (req->sv1);
1400	}
1401	else
1402	{
1403	req->type = EIO_FUTIME;
1404	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1405	}
1406
1407	EIO_SEND;
1408	}
1409
1410	void
1411	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
1412	PPCODE:
1413	{
1414	dREQ;
1415
1416	req->sv1 = newSVsv (fh_or_path);
1417	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1418
1419	if (SvPOK (fh_or_path))
1420	{
1421	req->type = EIO_TRUNCATE;
1422	req->ptr1 = SvPVbyte_nolen (req->sv1);
1423	}
1424	else
1425	{
1426	req->type = EIO_FTRUNCATE;
1427	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1428	}
1429
1430	EIO_SEND;
1431	}
1432
1433	void
1434	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
1435	ALIAS:
1436	aio_chmod = EIO_CHMOD
1437	aio_fchmod = EIO_FCHMOD
1438	aio_mkdir = EIO_MKDIR
1439	PPCODE:
1440	{
1441	dREQ;
1442
1443	req->type = type;
1444	req->int2 = mode;
1445	req->sv1 = newSVsv (fh_or_path);
1446
1447	if (ix == EIO_FCHMOD)
1448	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1449	else
1450	req->ptr1 = SvPVbyte_nolen (req->sv1);
1451
1452	EIO_SEND;
1453	}
1454
1455	void
1456	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
1457	PPCODE:
1458	{
1459	dREQ;
1460
1461	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1462	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1463	req->sv1 = newSVsv (fh_or_path);
1464
1465	if (SvPOK (fh_or_path))
1466	{
1467	req->type = EIO_CHOWN;
1468	req->ptr1 = SvPVbyte_nolen (req->sv1);
1469	}
1470	else
1471	{
1472	req->type = EIO_FCHOWN;
1473	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1474	}
1475
1476	EIO_SEND;
1477	}
1478
1479	void
1480	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1481	ALIAS:
1482	aio_unlink = EIO_UNLINK
1483	aio_rmdir = EIO_RMDIR
1484	aio_readdir = EIO_READDIR
1485	PPCODE:
1486	{
1487	dREQ;
1488
1489	req->type = ix;
1490	req->sv1 = newSVsv (pathname);
1491	req->ptr1 = SvPVbyte_nolen (req->sv1);
1492
1493	EIO_SEND;
1494	}
1495
1496	void
1497	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1498	ALIAS:
1499	aio_link = EIO_LINK
1500	aio_symlink = EIO_SYMLINK
1501	aio_rename = EIO_RENAME
1502	PPCODE:
1503	{
1504	dREQ;
1505
1506	req->type = ix;
1507	req->sv1 = newSVsv (oldpath);
1508	req->ptr1 = SvPVbyte_nolen (req->sv1);
1509	req->sv2 = newSVsv (newpath);
1510	req->ptr2 = SvPVbyte_nolen (req->sv2);
1511
1512	EIO_SEND;
1513	}
1514
1515	void
1516	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1517	PPCODE:
1518	{
1519	dREQ;
1520
1521	req->type = EIO_MKNOD;
1522	req->sv1 = newSVsv (pathname);
1523	req->ptr1 = SvPVbyte_nolen (req->sv1);
1524	req->int2 = (mode_t)mode;
1525	req->offs = dev;
1526
1527	EIO_SEND;
1528	}
1529
1530	void
1531	aio_busy (double delay, SV *callback=&PL_sv_undef)
1532	PPCODE:
1533	{
1534	dREQ;
1535
1536	req->type = EIO_BUSY;
1537	req->nv1 = delay < 0. ? 0. : delay;
1538
1539	EIO_SEND;
1540	}
1541
1542	void
1543	aio_group (SV *callback=&PL_sv_undef)
1544	PROTOTYPE: ;$
1545	PPCODE:
1546	{
1547	dREQ;
1548
1549	req->type = EIO_GROUP;
1550
1551	req_send (req);
1552	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1553	}
1554
1555	void
1556	aio_nop (SV *callback=&PL_sv_undef)
1557	ALIAS:
1558	aio_nop = EIO_NOP
1559	aio_sync = EIO_SYNC
1560	PPCODE:
1561	{
1562	dREQ;
1563
1564	#endif
1565		1511
1566	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	1512	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1567	{	1513	{
1568	grp->int2 = limit;	1514	grp->int2 = limit;
1569	grp->feed = feed;	1515	grp->feed = feed;
…		…
1580		1526
1581	void eio_grp_add (eio_req *grp, eio_req *req)	1527	void eio_grp_add (eio_req *grp, eio_req *req)
1582	{	1528	{
1583	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	1529	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
1584		1530
		1531	grp->flags |= EIO_FLAG_GROUPADD;
		1532
1585	++grp->size;	1533	++grp->size;
1586	req->grp = grp;	1534	req->grp = grp;
1587		1535
1588	req->grp_prev = 0;	1536	req->grp_prev = 0;
1589	req->grp_next = grp->grp_first;	1537	req->grp_next = grp->grp_first;
…		…
1592	grp->grp_first->grp_prev = req;	1540	grp->grp_first->grp_prev = req;
1593		1541
1594	grp->grp_first = req;	1542	grp->grp_first = req;
1595	}	1543	}
1596		1544
		1545	/*****************************************************************************/
		1546	/* misc garbage */
1597		1547
		1548	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		1549	{
		1550	etp_worker wrk;
		1551
		1552	wrk.dbuf = 0;
		1553
		1554	eio__sendfile (ofd, ifd, offset, count, &wrk);
		1555
		1556	if (wrk.dbuf)
		1557	free (wrk.dbuf);
		1558	}
		1559

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