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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 1.27 by root, Wed Oct 22 18:15:36 2008 UTC

		1	/*
		2	* libeio implementation
		3	*
		4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libeio@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without modifica-
		8	* tion, are permitted provided that the following conditions are met:
		9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*
		28	* Alternatively, the contents of this file may be used under the terms of
		29	* the GNU General Public License ("GPL") version 2 or any later version,
		30	* in which case the provisions of the GPL are applicable instead of
		31	* the above. If you wish to allow the use of your version of this file
		32	* only under the terms of the GPL and not to allow others to use your
		33	* version of this file under the BSD license, indicate your decision
		34	* by deleting the provisions above and replace them with the notice
		35	* and other provisions required by the GPL. If you do not delete the
		36	* provisions above, a recipient may use your version of this file under
		37	* either the BSD or the GPL.
		38	*/
		39
1	#include "eio.h"	40	#include "eio.h"
2	#include "xthread.h"	41	#include "xthread.h"
3		42
4	#include <errno.h>	43	#include <errno.h>
5	#include <stddef.h>	44	#include <stddef.h>
…		…
8	#include <errno.h>	47	#include <errno.h>
9	#include <sys/types.h>	48	#include <sys/types.h>
10	#include <sys/stat.h>	49	#include <sys/stat.h>
11	#include <limits.h>	50	#include <limits.h>
12	#include <fcntl.h>	51	#include <fcntl.h>
13	#include <sched.h>	52	#include <assert.h>
14		53
15	#ifndef EIO_FINISH	54	#ifndef EIO_FINISH
16	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0	55	# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0
17	#endif	56	#endif
18		57
…		…
41	# ifndef EIO_STRUCT_DIRENT	80	# ifndef EIO_STRUCT_DIRENT
42	# define EIO_STRUCT_DIRENT struct dirent	81	# define EIO_STRUCT_DIRENT struct dirent
43	# endif	82	# endif
44		83
45	#endif	84	#endif
46
47	# ifndef EIO_STRUCT_STAT
48	# define EIO_STRUCT_STAT struct stat
49	# endif
50		85
51	#if HAVE_SENDFILE	86	#if HAVE_SENDFILE
52	# if __linux	87	# if __linux
53	# include <sys/sendfile.h>	88	# include <sys/sendfile.h>
54	# elif __freebsd	89	# elif __freebsd
…		…
74	/* buffer size for various temporary buffers */	109	/* buffer size for various temporary buffers */
75	#define EIO_BUFSIZE 65536	110	#define EIO_BUFSIZE 65536
76		111
77	#define dBUF \	112	#define dBUF \
78	char *eio_buf; \	113	char *eio_buf; \
79	X_LOCK (wrklock); \	114	ETP_WORKER_LOCK (self); \
80	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \	115	self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \
81	X_UNLOCK (wrklock); \	116	ETP_WORKER_UNLOCK (self); \
		117	errno = ENOMEM; \
82	if (!eio_buf) \	118	if (!eio_buf) \
83	return -1;	119	return -1;
84		120
85	#define EIO_TICKS ((1000000 + 1023) >> 10)	121	#define EIO_TICKS ((1000000 + 1023) >> 10)
86		122
		123	/*****************************************************************************/
		124
		125	#if __GNUC__ >= 3
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
		127	#else
		128	# define expect(expr,value) (expr)
		129	#endif
		130
		131	#define expect_false(expr) expect ((expr) != 0, 0)
		132	#define expect_true(expr) expect ((expr) != 0, 1)
		133
		134	/*****************************************************************************/
		135
		136	#define ETP_PRI_MIN EIO_PRI_MIN
		137	#define ETP_PRI_MAX EIO_PRI_MAX
		138
		139	struct etp_worker;
		140
		141	#define ETP_REQ eio_req
		142	#define ETP_DESTROY(req) eio_destroy (req)
		143	static int eio_finish (eio_req *req);
		144	#define ETP_FINISH(req) eio_finish (req)
		145	static void eio_execute (struct etp_worker *self, eio_req *req);
		146	#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req)
		147
		148	#define ETP_WORKER_CLEAR(req) \
		149	if (wrk->dbuf) \
		150	{ \
		151	free (wrk->dbuf); \
		152	wrk->dbuf = 0; \
		153	} \
		154	\
		155	if (wrk->dirp) \
		156	{ \
		157	closedir (wrk->dirp); \
		158	wrk->dirp = 0; \
		159	}
		160	#define ETP_WORKER_COMMON \
		161	void *dbuf; \
		162	DIR *dirp;
		163
		164	/*****************************************************************************/
		165
		166	#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1)
		167
		168	/* calculcate time difference in ~1/EIO_TICKS of a second */
		169	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		170	{
		171	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS
		172	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		173	}
		174
		175	static unsigned int started, idle, wanted = 4;
		176
87	static void (*want_poll_cb) (void);	177	static void (*want_poll_cb) (void);
88	static void (*done_poll_cb) (void);	178	static void (*done_poll_cb) (void);
89		179
90	static unsigned int max_poll_time = 0;	180	static unsigned int max_poll_time; /* reslock */
91	static unsigned int max_poll_reqs = 0;	181	static unsigned int max_poll_reqs; /* reslock */
92		182
93	/* calculcate time difference in ~1/EIO_TICKS of a second */	183	static volatile unsigned int nreqs; /* reqlock */
94	static int tvdiff (struct timeval *tv1, struct timeval *tv2)	184	static volatile unsigned int nready; /* reqlock */
95	{	185	static volatile unsigned int npending; /* reqlock */
96	return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS	186	static volatile unsigned int max_idle = 4;
97	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
98	}
99		187
100	static unsigned int started, idle, wanted;
101
102	/* worker threads management */
103	static mutex_t wrklock = X_MUTEX_INIT;	188	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;	189	static mutex_t reslock = X_MUTEX_INIT;
146	static mutex_t reqlock = X_MUTEX_INIT;	190	static mutex_t reqlock = X_MUTEX_INIT;
147	static cond_t reqwait = X_COND_INIT;	191	static cond_t reqwait = X_COND_INIT;
148		192
		193	#if !HAVE_PREADWRITE
		194	/*
		195	* make our pread/pwrite emulation safe against themselves, but not against
		196	* normal read/write by using a mutex. slows down execution a lot,
		197	* but that's your problem, not mine.
		198	*/
		199	static mutex_t preadwritelock = X_MUTEX_INIT;
		200	#endif
		201
		202	typedef struct etp_worker
		203	{
		204	/* locked by wrklock */
		205	struct etp_worker *prev, *next;
		206
		207	thread_t tid;
		208
		209	/* locked by reslock, reqlock or wrklock */
		210	ETP_REQ *req; /* currently processed request */
		211
		212	ETP_WORKER_COMMON
		213	} etp_worker;
		214
		215	static etp_worker wrk_first = { &wrk_first, &wrk_first, 0 }; /* NOT etp */
		216
		217	#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock)
		218	#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock)
		219
		220	/* worker threads management */
		221
		222	static void etp_worker_clear (etp_worker *wrk)
		223	{
		224	ETP_WORKER_CLEAR (wrk);
		225	}
		226
		227	static void etp_worker_free (etp_worker *wrk)
		228	{
		229	wrk->next->prev = wrk->prev;
		230	wrk->prev->next = wrk->next;
		231
		232	free (wrk);
		233	}
		234
149	unsigned int eio_nreqs (void)	235	static unsigned int etp_nreqs (void)
150	{	236	{
		237	int retval;
		238	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		239	retval = nreqs;
		240	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
151	return nreqs;	241	return retval;
152	}	242	}
153		243
154	unsigned int eio_nready (void)	244	static unsigned int etp_nready (void)
155	{	245	{
156	unsigned int retval;	246	unsigned int retval;
157		247
158	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	248	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
159	retval = nready;	249	retval = nready;
160	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	250	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
161		251
162	return retval;	252	return retval;
163	}	253	}
164		254
165	unsigned int eio_npending (void)	255	static unsigned int etp_npending (void)
166	{	256	{
167	unsigned int retval;	257	unsigned int retval;
168		258
169	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	259	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
170	retval = npending;	260	retval = npending;
171	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);	261	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
172		262
173	return retval;	263	return retval;
174	}	264	}
175		265
176	unsigned int eio_nthreads (void)	266	static unsigned int etp_nthreads (void)
177	{	267	{
178	unsigned int retval;	268	unsigned int retval;
179		269
180	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);	270	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
181	retval = started;	271	retval = started;
…		…
188	* a somewhat faster data structure might be nice, but	278	* a somewhat faster data structure might be nice, but
189	* with 8 priorities this actually needs <20 insns	279	* with 8 priorities this actually needs <20 insns
190	* per shift, the most expensive operation.	280	* per shift, the most expensive operation.
191	*/	281	*/
192	typedef struct {	282	typedef struct {
193	eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */	283	ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */
194	int size;	284	int size;
195	} reqq;	285	} etp_reqq;
196		286
197	static reqq req_queue;	287	static etp_reqq req_queue;
198	static reqq res_queue;	288	static etp_reqq res_queue;
199		289
200	static int reqq_push (reqq *q, eio_req *req)	290	static int reqq_push (etp_reqq *q, ETP_REQ *req)
201	{	291	{
202	int pri = req->pri;	292	int pri = req->pri;
203	req->next = 0;	293	req->next = 0;
204		294
205	if (q->qe[pri])	295	if (q->qe[pri])
…		…
211	q->qe[pri] = q->qs[pri] = req;	301	q->qe[pri] = q->qs[pri] = req;
212		302
213	return q->size++;	303	return q->size++;
214	}	304	}
215		305
216	static eio_req *reqq_shift (reqq *q)	306	static ETP_REQ *reqq_shift (etp_reqq *q)
217	{	307	{
218	int pri;	308	int pri;
219		309
220	if (!q->size)	310	if (!q->size)
221	return 0;	311	return 0;
222		312
223	--q->size;	313	--q->size;
224		314
225	for (pri = EIO_NUM_PRI; pri--; )	315	for (pri = ETP_NUM_PRI; pri--; )
226	{	316	{
227	eio_req *req = q->qs[pri];	317	eio_req *req = q->qs[pri];
228		318
229	if (req)	319	if (req)
230	{	320	{
…		…
236	}	326	}
237		327
238	abort ();	328	abort ();
239	}	329	}
240		330
241	static void grp_try_feed (eio_req *grp)	331	static void etp_atfork_prepare (void)
242	{	332	{
243	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))	333	X_LOCK (wrklock);
		334	X_LOCK (reqlock);
		335	X_LOCK (reslock);
		336	#if !HAVE_PREADWRITE
		337	X_LOCK (preadwritelock);
		338	#endif
		339	}
		340
		341	static void etp_atfork_parent (void)
		342	{
		343	#if !HAVE_PREADWRITE
		344	X_UNLOCK (preadwritelock);
		345	#endif
		346	X_UNLOCK (reslock);
		347	X_UNLOCK (reqlock);
		348	X_UNLOCK (wrklock);
		349	}
		350
		351	static void etp_atfork_child (void)
		352	{
		353	ETP_REQ *prv;
		354
		355	while ((prv = reqq_shift (&req_queue)))
		356	ETP_DESTROY (prv);
		357
		358	while ((prv = reqq_shift (&res_queue)))
		359	ETP_DESTROY (prv);
		360
		361	while (wrk_first.next != &wrk_first)
244	{	362	{
245	int old_len = grp->size;	363	etp_worker *wrk = wrk_first.next;
246		364
247	EIO_FEED (grp);	365	if (wrk->req)
		366	ETP_DESTROY (wrk->req);
248		367
249	/* stop if no progress has been made */	368	etp_worker_clear (wrk);
250	if (old_len == grp->size)	369	etp_worker_free (wrk);
251	{
252	grp->feed = 0;
253	break;
254	}
255	}	370	}
256	}
257		371
258	static int eio_finish (eio_req *req);	372	started = 0;
		373	idle = 0;
		374	nreqs = 0;
		375	nready = 0;
		376	npending = 0;
259		377
260	static int grp_dec (eio_req *grp)	378	etp_atfork_parent ();
261	{	379	}
262	--grp->size;
263		380
264	/* call feeder, if applicable */	381	static void
265	grp_try_feed (grp);	382	etp_once_init (void)
		383	{
		384	X_THREAD_ATFORK (etp_atfork_prepare, etp_atfork_parent, etp_atfork_child);
		385	}
266		386
267	/* finish, if done */	387	static int
268	if (!grp->size && grp->int1)	388	etp_init (void (*want_poll)(void), void (*done_poll)(void))
269	return eio_finish (grp);	389	{
270	else	390	static pthread_once_t doinit = PTHREAD_ONCE_INIT;
		391
		392	pthread_once (&doinit, etp_once_init);
		393
		394	want_poll_cb = want_poll;
		395	done_poll_cb = done_poll;
		396
271	return 0;	397	return 0;
272	}	398	}
273		399
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);	400	X_THREAD_PROC (etp_proc);
325		401
326	static void start_thread (void)	402	static void etp_start_thread (void)
327	{	403	{
328	worker *wrk = calloc (1, sizeof (worker));	404	etp_worker *wrk = calloc (1, sizeof (etp_worker));
329		405
330	if (!wrk)	406	/*TODO*/
331	croak ("unable to allocate worker thread data");	407	assert (("unable to allocate worker thread data", wrk));
332		408
333	X_LOCK (wrklock);	409	X_LOCK (wrklock);
334		410
335	if (thread_create (&wrk->tid, eio_proc, (void *)wrk))	411	if (thread_create (&wrk->tid, etp_proc, (void *)wrk))
336	{	412	{
337	wrk->prev = &wrk_first;	413	wrk->prev = &wrk_first;
338	wrk->next = wrk_first.next;	414	wrk->next = wrk_first.next;
339	wrk_first.next->prev = wrk;	415	wrk_first.next->prev = wrk;
340	wrk_first.next = wrk;	416	wrk_first.next = wrk;
…		…
344	free (wrk);	420	free (wrk);
345		421
346	X_UNLOCK (wrklock);	422	X_UNLOCK (wrklock);
347	}	423	}
348		424
349	static void maybe_start_thread (void)	425	static void etp_maybe_start_thread (void)
350	{	426	{
351	if (eio_nthreads () >= wanted)	427	if (expect_true (etp_nthreads () >= wanted))
352	return;	428	return;
353		429
354	/* todo: maybe use idle here, but might be less exact */	430	/* todo: maybe use idle here, but might be less exact */
355	if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ())	431	if (expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ()))
356	return;	432	return;
357		433
358	start_thread ();	434	etp_start_thread ();
359	}	435	}
360		436
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)	437	static void etp_end_thread (void)
375	{	438	{
376	eio_req *req = calloc (1, sizeof (eio_req));	439	eio_req *req = calloc (1, sizeof (eio_req));
377		440
378	req->type = EIO_QUIT;	441	req->type = -1;
379	req->pri = EIO_PRI_MAX + EIO_PRI_BIAS;	442	req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
380		443
381	X_LOCK (reqlock);	444	X_LOCK (reqlock);
382	reqq_push (&req_queue, req);	445	reqq_push (&req_queue, req);
383	X_COND_SIGNAL (reqwait);	446	X_COND_SIGNAL (reqwait);
384	X_UNLOCK (reqlock);	447	X_UNLOCK (reqlock);
…		…
386	X_LOCK (wrklock);	449	X_LOCK (wrklock);
387	--started;	450	--started;
388	X_UNLOCK (wrklock);	451	X_UNLOCK (wrklock);
389	}	452	}
390		453
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)	454	static int etp_poll (void)
428	{	455	{
429	int maxreqs = max_poll_reqs;	456	unsigned int maxreqs;
		457	unsigned int maxtime;
430	struct timeval tv_start, tv_now;	458	struct timeval tv_start, tv_now;
431	eio_req *req;
432		459
		460	X_LOCK (reslock);
		461	maxreqs = max_poll_reqs;
		462	maxtime = max_poll_time;
		463	X_UNLOCK (reslock);
		464
433	if (max_poll_time)	465	if (maxtime)
434	gettimeofday (&tv_start, 0);	466	gettimeofday (&tv_start, 0);
435		467
436	for (;;)	468	for (;;)
437	{	469	{
		470	ETP_REQ *req;
		471
438	maybe_start_thread ();	472	etp_maybe_start_thread ();
439		473
440	X_LOCK (reslock);	474	X_LOCK (reslock);
441	req = reqq_shift (&res_queue);	475	req = reqq_shift (&res_queue);
442		476
443	if (req)	477	if (req)
…		…
451	X_UNLOCK (reslock);	485	X_UNLOCK (reslock);
452		486
453	if (!req)	487	if (!req)
454	return 0;	488	return 0;
455		489
		490	X_LOCK (reqlock);
456	--nreqs;	491	--nreqs;
		492	X_UNLOCK (reqlock);
457		493
458	if (req->type == EIO_GROUP && req->size)	494	if (expect_false (req->type == EIO_GROUP && req->size))
459	{	495	{
460	req->int1 = 1; /* mark request as delayed */	496	req->int1 = 1; /* mark request as delayed */
461	continue;	497	continue;
462	}	498	}
463	else	499	else
464	{	500	{
465	int res = eio_finish (req);	501	int res = ETP_FINISH (req);
466	if (res)	502	if (expect_false (res))
467	return res;	503	return res;
468	}	504	}
469		505
470	if (maxreqs && !--maxreqs)	506	if (expect_false (maxreqs && !--maxreqs))
471	break;	507	break;
472		508
473	if (max_poll_time)	509	if (maxtime)
474	{	510	{
475	gettimeofday (&tv_now, 0);	511	gettimeofday (&tv_now, 0);
476		512
477	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)	513	if (tvdiff (&tv_start, &tv_now) >= maxtime)
478	break;	514	break;
479	}	515	}
480	}	516	}
481		517
482	errno = EAGAIN;	518	errno = EAGAIN;
483	return -1;	519	return -1;
484	}	520	}
485		521
		522	static void etp_cancel (ETP_REQ *req)
		523	{
		524	X_LOCK (wrklock);
		525	req->flags |= EIO_FLAG_CANCELLED;
		526	X_UNLOCK (wrklock);
		527
		528	eio_grp_cancel (req);
		529	}
		530
		531	static void etp_submit (ETP_REQ *req)
		532	{
		533	req->pri -= ETP_PRI_MIN;
		534
		535	if (expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN;
		536	if (expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN;
		537
		538	if (expect_false (req->type == EIO_GROUP))
		539	{
		540	/* I hope this is worth it :/ */
		541	X_LOCK (reqlock);
		542	++nreqs;
		543	X_UNLOCK (reqlock);
		544
		545	X_LOCK (reslock);
		546
		547	++npending;
		548
		549	if (!reqq_push (&res_queue, req) && want_poll_cb)
		550	want_poll_cb ();
		551
		552	X_UNLOCK (reslock);
		553	}
		554	else
		555	{
		556	X_LOCK (reqlock);
		557	++nreqs;
		558	++nready;
		559	reqq_push (&req_queue, req);
		560	X_COND_SIGNAL (reqwait);
		561	X_UNLOCK (reqlock);
		562
		563	etp_maybe_start_thread ();
		564	}
		565	}
		566
		567	static void etp_set_max_poll_time (double nseconds)
		568	{
		569	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		570	max_poll_time = nseconds;
		571	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		572	}
		573
		574	static void etp_set_max_poll_reqs (unsigned int maxreqs)
		575	{
		576	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
		577	max_poll_reqs = maxreqs;
		578	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
		579	}
		580
		581	static void etp_set_max_idle (unsigned int nthreads)
		582	{
		583	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
		584	max_idle = nthreads <= 0 ? 1 : nthreads;
		585	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
		586	}
		587
		588	static void etp_set_min_parallel (unsigned int nthreads)
		589	{
		590	if (wanted < nthreads)
		591	wanted = nthreads;
		592	}
		593
		594	static void etp_set_max_parallel (unsigned int nthreads)
		595	{
		596	if (wanted > nthreads)
		597	wanted = nthreads;
		598
		599	while (started > wanted)
		600	etp_end_thread ();
		601	}
		602
		603	/*****************************************************************************/
		604
		605	static void grp_try_feed (eio_req *grp)
		606	{
		607	while (grp->size < grp->int2 && !EIO_CANCELLED (grp))
		608	{
		609	grp->flags &= ~EIO_FLAG_GROUPADD;
		610
		611	EIO_FEED (grp);
		612
		613	/* stop if no progress has been made */
		614	if (!(grp->flags & EIO_FLAG_GROUPADD))
		615	{
		616	grp->feed = 0;
		617	break;
		618	}
		619	}
		620	}
		621
		622	static int grp_dec (eio_req *grp)
		623	{
		624	--grp->size;
		625
		626	/* call feeder, if applicable */
		627	grp_try_feed (grp);
		628
		629	/* finish, if done */
		630	if (!grp->size && grp->int1)
		631	return eio_finish (grp);
		632	else
		633	return 0;
		634	}
		635
		636	void eio_destroy (eio_req *req)
		637	{
		638	if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1);
		639	if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2);
		640
		641	EIO_DESTROY (req);
		642	}
		643
		644	static int eio_finish (eio_req *req)
		645	{
		646	int res = EIO_FINISH (req);
		647
		648	if (req->grp)
		649	{
		650	int res2;
		651	eio_req *grp = req->grp;
		652
		653	/* unlink request */
		654	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		655	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		656
		657	if (grp->grp_first == req)
		658	grp->grp_first = req->grp_next;
		659
		660	res2 = grp_dec (grp);
		661
		662	if (!res && res2)
		663	res = res2;
		664	}
		665
		666	eio_destroy (req);
		667
		668	return res;
		669	}
		670
		671	void eio_grp_cancel (eio_req *grp)
		672	{
		673	for (grp = grp->grp_first; grp; grp = grp->grp_next)
		674	eio_cancel (grp);
		675	}
		676
		677	void eio_cancel (eio_req *req)
		678	{
		679	etp_cancel (req);
		680	}
		681
		682	void eio_submit (eio_req *req)
		683	{
		684	etp_submit (req);
		685	}
		686
		687	unsigned int eio_nreqs (void)
		688	{
		689	return etp_nreqs ();
		690	}
		691
		692	unsigned int eio_nready (void)
		693	{
		694	return etp_nready ();
		695	}
		696
		697	unsigned int eio_npending (void)
		698	{
		699	return etp_npending ();
		700	}
		701
		702	unsigned int eio_nthreads (void)
		703	{
		704	return etp_nthreads ();
		705	}
		706
		707	void eio_set_max_poll_time (double nseconds)
		708	{
		709	etp_set_max_poll_time (nseconds);
		710	}
		711
		712	void eio_set_max_poll_reqs (unsigned int maxreqs)
		713	{
		714	etp_set_max_poll_reqs (maxreqs);
		715	}
		716
		717	void eio_set_max_idle (unsigned int nthreads)
		718	{
		719	etp_set_max_idle (nthreads);
		720	}
		721
		722	void eio_set_min_parallel (unsigned int nthreads)
		723	{
		724	etp_set_min_parallel (nthreads);
		725	}
		726
		727	void eio_set_max_parallel (unsigned int nthreads)
		728	{
		729	etp_set_max_parallel (nthreads);
		730	}
		731
		732	int eio_poll (void)
		733	{
		734	return etp_poll ();
		735	}
		736
486	/*****************************************************************************/	737	/*****************************************************************************/
487	/* work around various missing functions */	738	/* work around various missing functions */
488		739
489	#if !HAVE_PREADWRITE	740	#if !HAVE_PREADWRITE
		741	# undef pread
		742	# undef pwrite
490	# define pread aio_pread	743	# define pread eio__pread
491	# define pwrite aio_pwrite	744	# define pwrite eio__pwrite
492		745
493	/*	746	static ssize_t
494	* make our pread/pwrite safe against themselves, but not against	747	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	{	748	{
502	ssize_t res;	749	ssize_t res;
503	off_t ooffset;	750	off_t ooffset;
504		751
505	X_LOCK (preadwritelock);	752	X_LOCK (preadwritelock);
…		…
510	X_UNLOCK (preadwritelock);	757	X_UNLOCK (preadwritelock);
511		758
512	return res;	759	return res;
513	}	760	}
514		761
515	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	762	static ssize_t
		763	eio__pwrite (int fd, void *buf, size_t count, off_t offset)
516	{	764	{
517	ssize_t res;	765	ssize_t res;
518	off_t ooffset;	766	off_t ooffset;
519		767
520	X_LOCK (preadwritelock);	768	X_LOCK (preadwritelock);
…		…
528	}	776	}
529	#endif	777	#endif
530		778
531	#ifndef HAVE_FUTIMES	779	#ifndef HAVE_FUTIMES
532		780
		781	# undef utimes
		782	# undef futimes
533	# define utimes(path,times) aio_utimes (path, times)	783	# define utimes(path,times) eio__utimes (path, times)
534	# define futimes(fd,times) aio_futimes (fd, times)	784	# define futimes(fd,times) eio__futimes (fd, times)
535		785
		786	static int
536	static int aio_utimes (const char *filename, const struct timeval times[2])	787	eio__utimes (const char *filename, const struct timeval times[2])
537	{	788	{
538	if (times)	789	if (times)
539	{	790	{
540	struct utimbuf buf;	791	struct utimbuf buf;
541		792
…		…
546	}	797	}
547	else	798	else
548	return utime (filename, 0);	799	return utime (filename, 0);
549	}	800	}
550		801
551	static int aio_futimes (int fd, const struct timeval tv[2])	802	static int eio__futimes (int fd, const struct timeval tv[2])
552	{	803	{
553	errno = ENOSYS;	804	errno = ENOSYS;
554	return -1;	805	return -1;
555	}	806	}
556		807
557	#endif	808	#endif
558		809
559	#if !HAVE_FDATASYNC	810	#if !HAVE_FDATASYNC
		811	# undef fdatasync
560	# define fdatasync fsync	812	# define fdatasync(fd) fsync (fd)
561	#endif	813	#endif
		814
		815	/* sync_file_range always needs emulation */
		816	int
		817	eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags)
		818	{
		819	#if HAVE_SYNC_FILE_RANGE
		820	int res;
		821
		822	if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE
		823	|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE
		824	|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER)
		825	{
		826	flags = 0
		827	| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0)
		828	| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0)
		829	| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0);
		830	}
		831
		832	res = sync_file_range (fd, offset, nbytes, flags);
		833
		834	if (res != ENOSYS)
		835	return res;
		836	#endif
		837
		838	/* even though we could play tricks with the flags, it's better to always
		839	* call fdatasync, as thta matches the expectation of it's users best */
		840	return fdatasync (fd);
		841	}
562		842
563	#if !HAVE_READAHEAD	843	#if !HAVE_READAHEAD
		844	# undef readahead
564	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	845	# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self)
565		846
		847	static ssize_t
566	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	848	eio__readahead (int fd, off_t offset, size_t count, etp_worker *self)
567	{	849	{
568	size_t todo = count;	850	size_t todo = count;
569	dBUF;	851	dBUF;
570		852
571	while (todo > 0)	853	while (todo > 0)
…		…
581	return count;	863	return count;
582	}	864	}
583		865
584	#endif	866	#endif
585		867
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 */	868	/* sendfile always needs emulation */
		869	static ssize_t
617	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	870	eio__sendfile (int ofd, int ifd, off_t offset, size_t count, etp_worker *self)
618	{	871	{
619	ssize_t res;	872	ssize_t res;
620		873
621	if (!count)	874	if (!count)
622	return 0;	875	return 0;
…		…
705		958
706	return res;	959	return res;
707	}	960	}
708		961
709	/* read a full directory */	962	/* read a full directory */
		963	static void
710	static void scandir_ (eio_req *req, worker *self)	964	eio__scandir (eio_req *req, etp_worker *self)
711	{	965	{
712	DIR *dirp;	966	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;	967	EIO_STRUCT_DIRENT *entp;
719	char *name, *names;	968	char *name, *names;
720	int memlen = 4096;	969	int memlen = 4096;
721	int memofs = 0;	970	int memofs = 0;
722	int res = 0;	971	int res = 0;
723		972
724	X_LOCK (wrklock);	973	X_LOCK (wrklock);
		974	/* the corresponding closedir is in ETP_WORKER_CLEAR */
725	self->dirp = dirp = opendir (req->ptr1);	975	self->dirp = dirp = opendir (req->ptr1);
726	self->dbuf = u = malloc (sizeof (*u));
727	req->flags |= EIO_FLAG_PTR2_FREE;	976	req->flags |= EIO_FLAG_PTR2_FREE;
728	req->ptr2 = names = malloc (memlen);	977	req->ptr2 = names = malloc (memlen);
729	X_UNLOCK (wrklock);	978	X_UNLOCK (wrklock);
730		979
731	if (dirp && u && names)	980	if (dirp && names)
732	for (;;)	981	for (;;)
733	{	982	{
734	errno = 0;	983	errno = 0;
735	readdir_r (dirp, &u->d, &entp);	984	entp = readdir (dirp);
736		985
737	if (!entp)	986	if (!entp)
738	break;	987	break;
739		988
740	name = entp->d_name;	989	name = entp->d_name;
…		…
765	res = -1;	1014	res = -1;
766		1015
767	req->result = res;	1016	req->result = res;
768	}	1017	}
769		1018
		1019	#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
		1020	# undef msync
		1021	# define msync(a,b,c) ENOSYS
		1022	#endif
		1023
		1024	int
		1025	eio__mtouch (void *mem, size_t len, int flags)
		1026	{
		1027	intptr_t addr = (intptr_t)mem;
		1028	intptr_t end = addr + len;
		1029	#ifdef PAGESIZE
		1030	const intptr_t page = PAGESIZE;
		1031	#else
		1032	static intptr_t page;
		1033
		1034	if (!page)
		1035	page = sysconf (_SC_PAGESIZE);
		1036	#endif
		1037
		1038	addr &= ~(page - 1); /* assume page size is always a power of two */
		1039
		1040	if (addr < end)
		1041	if (flags) /* modify */
		1042	do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len);
		1043	else
		1044	do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len);
		1045
		1046	return 0;
		1047	}
		1048
770	/*****************************************************************************/	1049	/*****************************************************************************/
771		1050
772	#define ALLOC(len) \	1051	#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) \	1052	if (!req->ptr2) \
778	{ \	1053	{ \
		1054	X_LOCK (wrklock); \
		1055	req->flags |= EIO_FLAG_PTR2_FREE; \
		1056	X_UNLOCK (wrklock); \
		1057	req->ptr2 = malloc (len); \
		1058	if (!req->ptr2) \
		1059	{ \
779	errno = ENOMEM; \	1060	errno = ENOMEM; \
780	req->result = -1; \	1061	req->result = -1; \
781	break; \	1062	break; \
		1063	} \
782	}	1064	}
783		1065
784	X_THREAD_PROC (eio_proc)	1066	X_THREAD_PROC (etp_proc)
785	{	1067	{
786	eio_req *req;	1068	ETP_REQ *req;
787	struct timespec ts;	1069	struct timespec ts;
788	worker *self = (worker *)thr_arg;	1070	etp_worker *self = (etp_worker *)thr_arg;
789		1071
790	/* try to distribute timeouts somewhat randomly */	1072	/* try to distribute timeouts somewhat randomly */
791	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);	1073	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
792		1074
793	for (;;)	1075	for (;;)
794	{	1076	{
795	ts.tv_sec = time (0) + IDLE_TIMEOUT;
796
797	X_LOCK (reqlock);	1077	X_LOCK (reqlock);
798		1078
799	for (;;)	1079	for (;;)
800	{	1080	{
801	self->req = req = reqq_shift (&req_queue);	1081	self->req = req = reqq_shift (&req_queue);
…		…
803	if (req)	1083	if (req)
804	break;	1084	break;
805		1085
806	++idle;	1086	++idle;
807		1087
		1088	ts.tv_sec = time (0) + IDLE_TIMEOUT;
808	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)	1089	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT)
809	{	1090	{
810	if (idle > max_idle)	1091	if (idle > max_idle)
811	{	1092	{
812	--idle;	1093	--idle;
…		…
817	goto quit;	1098	goto quit;
818	}	1099	}
819		1100
820	/* we are allowed to idle, so do so without any timeout */	1101	/* we are allowed to idle, so do so without any timeout */
821	X_COND_WAIT (reqwait, reqlock);	1102	X_COND_WAIT (reqwait, reqlock);
822	ts.tv_sec = time (0) + IDLE_TIMEOUT;
823	}	1103	}
824		1104
825	--idle;	1105	--idle;
826	}	1106	}
827		1107
828	--nready;	1108	--nready;
829		1109
830	X_UNLOCK (reqlock);	1110	X_UNLOCK (reqlock);
831		1111
832	errno = 0; /* strictly unnecessary */	1112	if (req->type < 0)
		1113	goto quit;
833		1114
834	if (!EIO_CANCELLED (req))	1115	if (!EIO_CANCELLED (req))
835	switch (req->type)	1116	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		1117
933	X_LOCK (reslock);	1118	X_LOCK (reslock);
934		1119
935	++npending;	1120	++npending;
936		1121
937	if (!reqq_push (&res_queue, req) && want_poll_cb)	1122	if (!reqq_push (&res_queue, req) && want_poll_cb)
938	want_poll_cb ();	1123	want_poll_cb ();
939		1124
940	self->req = 0;	1125	self->req = 0;
941	worker_clear (self);	1126	etp_worker_clear (self);
942		1127
943	X_UNLOCK (reslock);	1128	X_UNLOCK (reslock);
944	}	1129	}
945		1130
946	quit:	1131	quit:
947	X_LOCK (wrklock);	1132	X_LOCK (wrklock);
948	worker_free (self);	1133	etp_worker_free (self);
949	X_UNLOCK (wrklock);	1134	X_UNLOCK (wrklock);
950		1135
951	return 0;	1136	return 0;
952	}	1137	}
953		1138
954	/*****************************************************************************/	1139	/*****************************************************************************/
955		1140
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))	1141	int eio_init (void (*want_poll)(void), void (*done_poll)(void))
1013	{	1142	{
1014	want_poll_cb = want_poll;	1143	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	}	1144	}
1030		1145
1031	static void eio_api_destroy (eio_req *req)	1146	static void eio_api_destroy (eio_req *req)
1032	{	1147	{
1033	free (req);	1148	free (req);
…		…
1038	\	1153	\
1039	req = (eio_req *)calloc (1, sizeof *req); \	1154	req = (eio_req *)calloc (1, sizeof *req); \
1040	if (!req) \	1155	if (!req) \
1041	return 0; \	1156	return 0; \
1042	\	1157	\
1043	req->type = EIO_ ## rtype; \	1158	req->type = rtype; \
1044	req->pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \	1159	req->pri = pri; \
1045	req->finish = cb; \	1160	req->finish = cb; \
		1161	req->data = data; \
1046	req->destroy = eio_api_destroy;	1162	req->destroy = eio_api_destroy;
1047		1163
1048	#define SEND eio_submit (req); return req	1164	#define SEND eio_submit (req); return req
1049		1165
1050	#define PATH (void)0	1166	#define PATH \
		1167	req->flags |= EIO_FLAG_PTR1_FREE; \
		1168	req->ptr1 = strdup (path); \
		1169	if (!req->ptr1) \
		1170	{ \
		1171	eio_api_destroy (req); \
		1172	return 0; \
		1173	}
1051		1174
		1175	static void eio_execute (etp_worker *self, eio_req *req)
		1176	{
		1177	errno = 0;
		1178
		1179	switch (req->type)
		1180	{
		1181	case EIO_READ: ALLOC (req->size);
		1182	req->result = req->offs >= 0
		1183	? pread (req->int1, req->ptr2, req->size, req->offs)
		1184	: read (req->int1, req->ptr2, req->size); break;
		1185	case EIO_WRITE: req->result = req->offs >= 0
		1186	? pwrite (req->int1, req->ptr2, req->size, req->offs)
		1187	: write (req->int1, req->ptr2, req->size); break;
		1188
		1189	case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1190	case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break;
		1191
		1192	case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1193	req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1194	case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1195	req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1196	case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT));
		1197	req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break;
		1198
		1199	case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1200	case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1201	case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break;
		1202	case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break;
		1203	case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1204	case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
		1205
		1206	case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break;
		1207	case EIO_CLOSE: req->result = close (req->int1); break;
		1208	case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break;
		1209	case EIO_UNLINK: req->result = unlink (req->ptr1); break;
		1210	case EIO_RMDIR: req->result = rmdir (req->ptr1); break;
		1211	case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break;
		1212	case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break;
		1213	case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break;
		1214	case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break;
		1215	case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->int3); break;
		1216
		1217	case EIO_READLINK: ALLOC (NAME_MAX);
		1218	req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break;
		1219
		1220	case EIO_SYNC: req->result = 0; sync (); break;
		1221	case EIO_FSYNC: req->result = fsync (req->int1); break;
		1222	case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
		1223	case EIO_MSYNC: req->result = msync (req->ptr2, req->size, req->int1); break;
		1224	case EIO_MTOUCH: req->result = eio__mtouch (req->ptr2, req->size, req->int1); break;
		1225	case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break;
		1226
		1227	case EIO_READDIR: eio__scandir (req, self); break;
		1228
		1229	case EIO_BUSY:
		1230	#ifdef _WIN32
		1231	Sleep (req->nv1 * 1000.);
		1232	#else
		1233	{
		1234	struct timeval tv;
		1235
		1236	tv.tv_sec = req->nv1;
		1237	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
		1238
		1239	req->result = select (0, 0, 0, 0, &tv);
		1240	}
		1241	#endif
		1242	break;
		1243
		1244	case EIO_UTIME:
		1245	case EIO_FUTIME:
		1246	{
		1247	struct timeval tv[2];
		1248	struct timeval *times;
		1249
		1250	if (req->nv1 != -1. || req->nv2 != -1.)
		1251	{
		1252	tv[0].tv_sec = req->nv1;
		1253	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1254	tv[1].tv_sec = req->nv2;
		1255	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1256
		1257	times = tv;
		1258	}
		1259	else
		1260	times = 0;
		1261
		1262
		1263	req->result = req->type == EIO_FUTIME
		1264	? futimes (req->int1, times)
		1265	: utimes (req->ptr1, times);
		1266	}
		1267	break;
		1268
		1269	case EIO_GROUP:
		1270	abort (); /* handled in eio_request */
		1271
		1272	case EIO_NOP:
		1273	req->result = 0;
		1274	break;
		1275
		1276	case EIO_CUSTOM:
		1277	((void (*)(eio_req *))req->feed) (req);
		1278	break;
		1279
		1280	default:
		1281	req->result = -1;
		1282	break;
		1283	}
		1284
		1285	req->errorno = errno;
		1286	}
		1287
		1288	#ifndef EIO_NO_WRAPPERS
		1289
		1290	eio_req *eio_nop (int pri, eio_cb cb, void *data)
		1291	{
		1292	REQ (EIO_NOP); SEND;
		1293	}
		1294
		1295	eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data)
		1296	{
		1297	REQ (EIO_BUSY); req->nv1 = delay; SEND;
		1298	}
		1299
1052	eio_req *eio_fsync (int fd, eio_cb cb)	1300	eio_req *eio_sync (int pri, eio_cb cb, void *data)
1053	{	1301	{
		1302	REQ (EIO_SYNC); SEND;
		1303	}
		1304
		1305	eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data)
		1306	{
1054	REQ (FSYNC); req->int1 = fd; SEND;	1307	REQ (EIO_FSYNC); req->int1 = fd; SEND;
1055	}	1308	}
1056		1309
		1310	eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1311	{
		1312	REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1313	}
		1314
		1315	eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
		1316	{
		1317	REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
		1318	}
		1319
		1320	eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data)
		1321	{
		1322	REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND;
		1323	}
		1324
1057	eio_req *eio_fdatasync (int fd, eio_cb cb)	1325	eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
1058	{	1326	{
1059	REQ (FDATASYNC); req->int1 = fd; SEND;	1327	REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
1060	}	1328	}
1061		1329
		1330	eio_req *eio_close (int fd, int pri, eio_cb cb, void *data)
		1331	{
		1332	REQ (EIO_CLOSE); req->int1 = fd; SEND;
		1333	}
		1334
1062	eio_req *eio_readahead (int fd, off_t offset, size_t length, eio_cb cb)	1335	eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data)
1063	{	1336	{
1064	REQ (READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;	1337	REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND;
1065	}	1338	}
1066		1339
1067	eio_req *eio_read (int fd, off_t offset, size_t length, void *data, eio_cb cb)	1340	eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1068	{	1341	{
1069	REQ (READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	1342	REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1070	}	1343	}
1071		1344
1072	eio_req *eio_write (int fd, off_t offset, size_t length, void *data, eio_cb cb)	1345	eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data)
1073	{	1346	{
1074	REQ (WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = data; SEND;	1347	REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND;
1075	}	1348	}
1076		1349
1077	eio_req *eio_fstat (int fd, eio_cb cb)	1350	eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data)
1078	{	1351	{
1079	REQ (FSTAT); req->int1 = fd; SEND;	1352	REQ (EIO_FSTAT); req->int1 = fd; SEND;
1080	}	1353	}
1081		1354
1082	eio_req *eio_futime (int fd, double atime, double mtime, eio_cb cb)	1355	eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data)
1083	{	1356	{
1084	REQ (FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;	1357	REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND;
1085	}	1358	}
1086		1359
1087	eio_req *eio_ftruncate (int fd, off_t offset, eio_cb cb)	1360	eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data)
1088	{	1361	{
1089	REQ (FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;	1362	REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND;
1090	}	1363	}
1091		1364
1092	eio_req *eio_fchmod (int fd, mode_t mode, eio_cb cb)	1365	eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data)
1093	{	1366	{
1094	REQ (FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;	1367	REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND;
1095	}	1368	}
1096		1369
1097	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, eio_cb cb)	1370	eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
1098	{	1371	{
1099	REQ (FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	1372	REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1100	}	1373	}
1101		1374
1102	eio_req *eio_dup2 (int fd, int fd2, eio_cb cb)	1375	eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data)
1103	{	1376	{
1104	REQ (DUP2); req->int1 = fd; req->int2 = fd2; SEND;	1377	REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND;
1105	}	1378	}
1106		1379
1107	eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, eio_cb cb)	1380	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	{	1381	{
1109	REQ (SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;	1382	REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND;
1110	}	1383	}
1111		1384
1112	eio_req *eio_open (const char *path, int flags, mode_t mode, eio_cb cb)	1385	eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data)
1113	{	1386	{
1114	REQ (OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;	1387	REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND;
1115	}	1388	}
1116		1389
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)	1390	eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data)
1133	{	1391	{
1134	REQ (UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;	1392	REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND;
1135	}	1393	}
1136		1394
1137	eio_req *eio_truncate (const char *path, off_t offset, eio_cb cb)	1395	eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data)
1138	{	1396	{
1139	REQ (TRUNCATE); PATH; req->offs = offset; SEND;	1397	REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND;
1140	}	1398	}
1141		1399
1142	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, eio_cb cb)	1400	eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data)
1143	{	1401	{
1144	REQ (CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;	1402	REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND;
1145	}	1403	}
1146		1404
1147	eio_req *eio_chmod (const char *path, mode_t mode, eio_cb cb)	1405	eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1148	{	1406	{
1149	REQ (CHMOD); PATH; req->int2 = (long)mode; SEND;	1407	REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND;
1150	}	1408	}
1151		1409
1152	eio_req *eio_mkdir (const char *path, mode_t mode, eio_cb cb)	1410	eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data)
1153	{	1411	{
1154	REQ (MKDIR); PATH; req->int2 = (long)mode; SEND;	1412	REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND;
1155	}	1413	}
1156		1414
1157	eio_req *eio_unlink (const char *path, eio_cb cb)	1415	static eio_req *
		1416	eio__1path (int type, const char *path, int pri, eio_cb cb, void *data)
1158	{	1417	{
1159	REQ (UNLINK); PATH; SEND;
1160	}
1161
1162	eio_req *eio_rmdir (const char *path, eio_cb cb)
1163	{
1164	REQ (RMDIR); PATH; SEND;	1418	REQ (type); PATH; SEND;
1165	}	1419	}
1166		1420
		1421	eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data)
		1422	{
		1423	return eio__1path (EIO_READLINK, path, pri, cb, data);
		1424	}
		1425
		1426	eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data)
		1427	{
		1428	return eio__1path (EIO_STAT, path, pri, cb, data);
		1429	}
		1430
		1431	eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data)
		1432	{
		1433	return eio__1path (EIO_LSTAT, path, pri, cb, data);
		1434	}
		1435
		1436	eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data)
		1437	{
		1438	return eio__1path (EIO_UNLINK, path, pri, cb, data);
		1439	}
		1440
		1441	eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data)
		1442	{
		1443	return eio__1path (EIO_RMDIR, path, pri, cb, data);
		1444	}
		1445
1167	eio_req *eio_readdir (const char *path, eio_cb cb)	1446	eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data)
1168	{	1447	{
1169	REQ (READDIR); PATH; SEND;	1448	return eio__1path (EIO_READDIR, path, pri, cb, data);
1170	}	1449	}
1171		1450
1172	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, eio_cb cb)	1451	eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data)
1173	{	1452	{
1174	REQ (MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND;	1453	REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int3 = (long)dev; SEND;
1175	}	1454	}
1176		1455
1177	eio_req *eio_busy (double delay, eio_cb cb)	1456	static eio_req *
		1457	eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data)
1178	{	1458	{
1179	REQ (BUSY); req->nv1 = delay; SEND;	1459	REQ (type); PATH;
1180	}
1181		1460
		1461	req->flags |= EIO_FLAG_PTR2_FREE;
		1462	req->ptr2 = strdup (new_path);
		1463	if (!req->ptr2)
		1464	{
		1465	eio_api_destroy (req);
		1466	return 0;
		1467	}
		1468
		1469	SEND;
		1470	}
		1471
		1472	eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1473	{
		1474	return eio__2path (EIO_LINK, path, new_path, pri, cb, data);
		1475	}
		1476
		1477	eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1478	{
		1479	return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data);
		1480	}
		1481
		1482	eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data)
		1483	{
		1484	return eio__2path (EIO_RENAME, path, new_path, pri, cb, data);
		1485	}
		1486
		1487	eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data)
		1488	{
		1489	REQ (EIO_CUSTOM); req->feed = (void (*)(eio_req *))execute; SEND;
		1490	}
		1491
		1492	#endif
		1493
1182	eio_req *eio_nop (eio_cb cb)	1494	eio_req *eio_grp (eio_cb cb, void *data)
1183	{	1495	{
		1496	const int pri = EIO_PRI_MAX;
		1497
1184	REQ (NOP); SEND;	1498	REQ (EIO_GROUP); SEND;
1185	}	1499	}
1186		1500
1187	#undef REQ	1501	#undef REQ
1188	#undef PATH	1502	#undef PATH
1189	#undef SEND	1503	#undef SEND
1190		1504
1191	#if 0	1505	/*****************************************************************************/
1192		1506	/* 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		1507
1566	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)	1508	void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit)
1567	{	1509	{
1568	grp->int2 = limit;	1510	grp->int2 = limit;
1569	grp->feed = feed;	1511	grp->feed = feed;
…		…
1580		1522
1581	void eio_grp_add (eio_req *grp, eio_req *req)	1523	void eio_grp_add (eio_req *grp, eio_req *req)
1582	{	1524	{
1583	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));	1525	assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2));
1584		1526
		1527	grp->flags |= EIO_FLAG_GROUPADD;
		1528
1585	++grp->size;	1529	++grp->size;
1586	req->grp = grp;	1530	req->grp = grp;
1587		1531
1588	req->grp_prev = 0;	1532	req->grp_prev = 0;
1589	req->grp_next = grp->grp_first;	1533	req->grp_next = grp->grp_first;
…		…
1592	grp->grp_first->grp_prev = req;	1536	grp->grp_first->grp_prev = req;
1593		1537
1594	grp->grp_first = req;	1538	grp->grp_first = req;
1595	}	1539	}
1596		1540
		1541	/*****************************************************************************/
		1542	/* misc garbage */
1597		1543
		1544	ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count)
		1545	{
		1546	etp_worker wrk;
		1547
		1548	wrk.dbuf = 0;
		1549
		1550	eio__sendfile (ofd, ifd, offset, count, &wrk);
		1551
		1552	if (wrk.dbuf)
		1553	free (wrk.dbuf);
		1554	}
		1555

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