[ViewVC] Diff of: cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.44 by root, Sat Oct 21 23:20:29 2006 UTC vs.
Revision 1.70 by root, Tue Oct 24 15:15:56 2006 UTC

…		…
		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux
		5	# define _GNU_SOURCE
		6	#endif
		7
1	#define _REENTRANT 1	8	#define _REENTRANT 1
		9
2	#include <errno.h>	10	#include <errno.h>
3		11
4	#include "EXTERN.h"	12	#include "EXTERN.h"
5	#include "perl.h"	13	#include "perl.h"
6	#include "XSUB.h"	14	#include "XSUB.h"
9		17
10	#include <pthread.h>	18	#include <pthread.h>
11		19
12	#include <stddef.h>	20	#include <stddef.h>
13	#include <errno.h>	21	#include <errno.h>
		22	#include <sys/time.h>
		23	#include <sys/select.h>
14	#include <sys/types.h>	24	#include <sys/types.h>
15	#include <sys/stat.h>	25	#include <sys/stat.h>
16	#include <limits.h>	26	#include <limits.h>
17	#include <unistd.h>	27	#include <unistd.h>
18	#include <fcntl.h>	28	#include <fcntl.h>
…		…
39	# define NAME_MAX 4096	49	# define NAME_MAX 4096
40	#endif	50	#endif
41		51
42	#if __ia64	52	#if __ia64
43	# define STACKSIZE 65536	53	# define STACKSIZE 65536
		54	#elif __i386 \|\| __x86_64 /* 16k is unreasonably high :( */
		55	# define STACKSIZE PTHREAD_STACK_MIN
44	#else	56	#else
45	# define STACKSIZE 8192	57	# define STACKSIZE 16384
46	#endif	58	#endif
		59
		60	/* buffer size for various temporary buffers */
		61	#define AIO_BUFSIZE 65536
		62
		63	#define dBUF \
		64	char *aio_buf = malloc (AIO_BUFSIZE); \
		65	if (!aio_buf) \
		66	return -1;
		67
		68	#define fBUF free (aio_buf)
47		69
48	enum {	70	enum {
49	REQ_QUIT,	71	REQ_QUIT,
50	REQ_OPEN, REQ_CLOSE,	72	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	73	REQ_READ, REQ_WRITE, REQ_READAHEAD,
…		…
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	75	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,	76	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	77	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,	78	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,	79	REQ_LINK, REQ_SYMLINK,
58	REQ_GROUP,	80	REQ_GROUP, REQ_NOP,
		81	REQ_BUSY,
59	};	82	};
60		83
61	#define AIO_REQ_KLASS "IO::AIO::REQ"	84	#define AIO_REQ_KLASS "IO::AIO::REQ"
62	#define AIO_GRP_KLASS "IO::AIO::GRP"	85	#define AIO_GRP_KLASS "IO::AIO::GRP"
63		86
64	typedef struct aio_cb	87	typedef struct aio_cb
65	{	88	{
66	struct aio_cb grp, grp_prev, *grp_next;
67
68	struct aio_cb *volatile next;	89	struct aio_cb *volatile next;
69
70	SV self; / the perl counterpart of this request, if any */
71		90
72	SV data, callback;	91	SV data, callback;
73	SV fh, fh2;	92	SV fh, fh2;
74	void dataptr, data2ptr;	93	void dataptr, data2ptr;
75	Stat_t *statdata;	94	Stat_t *statdata;
76	off_t offset;	95	off_t offset;
77	size_t length;	96	size_t length;
78	ssize_t result;	97	ssize_t result;
79		98
		99	STRLEN dataoffset;
80	int type;	100	int type;
81	int fd, fd2;	101	int fd, fd2;
82	int errorno;	102	int errorno;
83	STRLEN dataoffset;
84	mode_t mode; /* open */	103	mode_t mode; /* open */
		104
85	unsigned char cancelled;	105	unsigned char flags;
		106	unsigned char pri;
		107
		108	SV self; / the perl counterpart of this request, if any */
		109	struct aio_cb grp, grp_prev, grp_next, grp_first;
86	} aio_cb;	110	} aio_cb;
		111
		112	enum {
		113	FLAG_CANCELLED = 0x01,
		114	};
87		115
88	typedef aio_cb *aio_req;	116	typedef aio_cb *aio_req;
89	typedef aio_cb *aio_req_ornot;	117	typedef aio_cb *aio_req_ornot;
90	typedef aio_cb *aio_group;	118
		119	enum {
		120	PRI_MIN = -4,
		121	PRI_MAX = 4,
		122
		123	DEFAULT_PRI = 0,
		124	PRI_BIAS = -PRI_MIN,
		125	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		126	};
		127
		128	static int next_pri = DEFAULT_PRI + PRI_BIAS;
91		129
92	static int started, wanted;	130	static int started, wanted;
93	static volatile int nreqs;	131	static volatile int nreqs;
94	static int max_outstanding = 1<<30;	132	static int max_outstanding = 1<<30;
95	static int respipe [2];	133	static int respipe [2];
96		134
		135	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		136	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		137	#else
		138	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		139	#endif
		140
97	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	141	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
98	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	142	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
99	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	143	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
100		144
101	static volatile aio_req reqs, reqe; /* queue start, queue end */	145	/*
102	static volatile aio_req ress, rese; /* queue start, queue end */	146	* a somewhat faster data structure might be nice, but
		147	* with 8 priorities this actually needs <20 insns
		148	* per shift, the most expensive operation.
		149	*/
		150	typedef struct {
		151	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		152	int size;
		153	} reqq;
		154
		155	static reqq req_queue;
		156	static reqq res_queue;
		157
		158	int reqq_push (reqq *q, aio_req req)
		159	{
		160	int pri = req->pri;
		161	req->next = 0;
		162
		163	if (q->qe[pri])
		164	{
		165	q->qe[pri]->next = req;
		166	q->qe[pri] = req;
		167	}
		168	else
		169	q->qe[pri] = q->qs[pri] = req;
		170
		171	return q->size++;
		172	}
		173
		174	aio_req reqq_shift (reqq *q)
		175	{
		176	int pri;
		177
		178	if (!q->size)
		179	return 0;
		180
		181	--q->size;
		182
		183	for (pri = NUM_PRI; pri--; )
		184	{
		185	aio_req req = q->qs[pri];
		186
		187	if (req)
		188	{
		189	if (!(q->qs[pri] = req->next))
		190	q->qe[pri] = 0;
		191
		192	return req;
		193	}
		194	}
		195
		196	abort ();
		197	}
		198
		199	static void req_invoke (aio_req req);
		200	static void req_free (aio_req req);
103		201
104	/* must be called at most once */	202	/* must be called at most once */
105	static SV req_sv (aio_req req, const char klass)	203	static SV req_sv (aio_req req, const char klass)
106	{	204	{
		205	if (!req->self)
		206	{
107	req->self = (SV *)newHV ();	207	req->self = (SV *)newHV ();
108	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	208	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		209	}
109		210
110	return sv_2mortal (sv_bless (newRV_noinc (req->self), gv_stashpv (klass, 1)));	211	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
111	}	212	}
112		213
113	static aio_req SvAIO_REQ (SV sv, const char klass)	214	static aio_req SvAIO_REQ (SV *sv)
114	{	215	{
		216	MAGIC *mg;
		217
115	if (!sv_derived_from (sv, klass) \|\| !SvROK (sv))	218	if (!sv_derived_from (sv, AIO_REQ_KLASS) \|\| !SvROK (sv))
116	croak ("object of class %s expected", klass);	219	croak ("object of class " AIO_REQ_KLASS " expected");
117		220
118	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	221	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
119		222
120	return mg ? (aio_req)mg->mg_ptr : 0;	223	return mg ? (aio_req)mg->mg_ptr : 0;
		224	}
		225
		226	static void aio_grp_feed (aio_req grp)
		227	{
		228	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		229	{
		230	int old_len = grp->length;
		231
		232	if (grp->fh2 && SvOK (grp->fh2))
		233	{
		234	dSP;
		235
		236	ENTER;
		237	SAVETMPS;
		238	PUSHMARK (SP);
		239	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		240	PUTBACK;
		241	call_sv (grp->fh2, G_VOID \| G_EVAL \| G_KEEPERR);
		242	SPAGAIN;
		243	FREETMPS;
		244	LEAVE;
		245	}
		246
		247	/* stop if no progress has been made */
		248	if (old_len == grp->length)
		249	{
		250	SvREFCNT_dec (grp->fh2);
		251	grp->fh2 = 0;
		252	break;
		253	}
		254	}
		255	}
		256
		257	static void aio_grp_dec (aio_req grp)
		258	{
		259	--grp->length;
		260
		261	/* call feeder, if applicable */
		262	aio_grp_feed (grp);
		263
		264	/* finish, if done */
		265	if (!grp->length && grp->fd)
		266	{
		267	req_invoke (grp);
		268	req_free (grp);
		269	}
		270	}
		271
		272	static void poll_wait ()
		273	{
		274	fd_set rfd;
		275
		276	while (nreqs)
		277	{
		278	int size;
		279	#if !(__i386 \|\| __x86_64) /* safe without sempahore on this archs */
		280	pthread_mutex_lock (&reslock);
		281	#endif
		282	size = res_queue.size;
		283	#if !(__i386 \|\| __x86_64) /* safe without sempahore on this archs */
		284	pthread_mutex_unlock (&reslock);
		285	#endif
		286
		287	if (size)
		288	return;
		289
		290	FD_ZERO(&rfd);
		291	FD_SET(respipe [0], &rfd);
		292
		293	select (respipe [0] + 1, &rfd, 0, 0, 0);
		294	}
		295	}
		296
		297	static void req_invoke (aio_req req)
		298	{
		299	dSP;
		300
		301	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		302	{
		303	errno = req->errorno;
		304
		305	ENTER;
		306	SAVETMPS;
		307	PUSHMARK (SP);
		308	EXTEND (SP, 1);
		309
		310	switch (req->type)
		311	{
		312	case REQ_READDIR:
		313	{
		314	SV *rv = &PL_sv_undef;
		315
		316	if (req->result >= 0)
		317	{
		318	char *buf = req->data2ptr;
		319	AV *av = newAV ();
		320
		321	while (req->result)
		322	{
		323	SV *sv = newSVpv (buf, 0);
		324
		325	av_push (av, sv);
		326	buf += SvCUR (sv) + 1;
		327	req->result--;
		328	}
		329
		330	rv = sv_2mortal (newRV_noinc ((SV *)av));
		331	}
		332
		333	PUSHs (rv);
		334	}
		335	break;
		336
		337	case REQ_OPEN:
		338	{
		339	/* convert fd to fh */
		340	SV *fh;
		341
		342	PUSHs (sv_2mortal (newSViv (req->result)));
		343	PUTBACK;
		344	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		345	SPAGAIN;
		346
		347	fh = SvREFCNT_inc (POPs);
		348
		349	PUSHMARK (SP);
		350	XPUSHs (sv_2mortal (fh));
		351	}
		352	break;
		353
		354	case REQ_GROUP:
		355	req->fd = 2; /* mark group as finished */
		356
		357	if (req->data)
		358	{
		359	int i;
		360	AV av = (AV )req->data;
		361
		362	EXTEND (SP, AvFILL (av) + 1);
		363	for (i = 0; i <= AvFILL (av); ++i)
		364	PUSHs (*av_fetch (av, i, 0));
		365	}
		366	break;
		367
		368	case REQ_NOP:
		369	case REQ_BUSY:
		370	break;
		371
		372	default:
		373	PUSHs (sv_2mortal (newSViv (req->result)));
		374	break;
		375	}
		376
		377
		378	PUTBACK;
		379	call_sv (req->callback, G_VOID \| G_EVAL);
		380	SPAGAIN;
		381
		382	FREETMPS;
		383	LEAVE;
		384	}
		385
		386	if (req->grp)
		387	{
		388	aio_req grp = req->grp;
		389
		390	/* unlink request */
		391	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		392	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		393
		394	if (grp->grp_first == req)
		395	grp->grp_first = req->grp_next;
		396
		397	aio_grp_dec (grp);
		398	}
		399
		400	if (SvTRUE (ERRSV))
		401	{
		402	req_free (req);
		403	croak (0);
		404	}
121	}	405	}
122		406
123	static void req_free (aio_req req)	407	static void req_free (aio_req req)
124	{	408	{
125	if (req->self)	409	if (req->self)
126	{	410	{
127	sv_unmagic (req->self, PERL_MAGIC_ext);	411	sv_unmagic (req->self, PERL_MAGIC_ext);
128	SvREFCNT_dec (req->self);	412	SvREFCNT_dec (req->self);
129	}	413	}
130		414
131	if (req->data)
132	SvREFCNT_dec (req->data);	415	SvREFCNT_dec (req->data);
133
134	if (req->fh)
135	SvREFCNT_dec (req->fh);	416	SvREFCNT_dec (req->fh);
136
137	if (req->fh2)
138	SvREFCNT_dec (req->fh2);	417	SvREFCNT_dec (req->fh2);
139
140	if (req->statdata)
141	Safefree (req->statdata);
142
143	if (req->callback)
144	SvREFCNT_dec (req->callback);	418	SvREFCNT_dec (req->callback);
		419	Safefree (req->statdata);
145		420
146	if (req->type == REQ_READDIR && req->result >= 0)	421	if (req->type == REQ_READDIR && req->result >= 0)
147	free (req->data2ptr);	422	free (req->data2ptr);
148		423
149	Safefree (req);	424	Safefree (req);
150	}	425	}
151		426
152	static void	427	static void req_cancel (aio_req req)
153	poll_wait ()
154	{	428	{
155	if (nreqs && !ress)	429	req->flags \|= FLAG_CANCELLED;
156	{
157	fd_set rfd;
158	FD_ZERO(&rfd);
159	FD_SET(respipe [0], &rfd);
160		430
161	select (respipe [0] + 1, &rfd, 0, 0, 0);	431	if (req->type == REQ_GROUP)
162	}	432	{
163	}	433	aio_req sub;
164		434
165	static int	435	for (sub = req->grp_first; sub; sub = sub->grp_next)
166	poll_cb ()	436	req_cancel (sub);
		437	}
		438	}
		439
		440	static int poll_cb ()
167	{	441	{
168	dSP;	442	dSP;
169	int count = 0;	443	int count = 0;
170	int do_croak = 0;	444	int do_croak = 0;
171	aio_req req;	445	aio_req req;
172		446
173	for (;;)	447	for (;;)
174	{	448	{
175	pthread_mutex_lock (&reslock);	449	pthread_mutex_lock (&reslock);
176	req = ress;	450	req = reqq_shift (&res_queue);
177		451
178	if (req)	452	if (req)
179	{	453	{
180	ress = req->next;
181
182	if (!ress)	454	if (!res_queue.size)
183	{	455	{
184	/* read any signals sent by the worker threads */	456	/* read any signals sent by the worker threads */
185	char buf [32];	457	char buf [32];
186	while (read (respipe [0], buf, 32) == 32)	458	while (read (respipe [0], buf, 32) == 32)
187	;	459	;
188
189	rese = 0;
190	}	460	}
191	}	461	}
192		462
193	pthread_mutex_unlock (&reslock);	463	pthread_mutex_unlock (&reslock);
194		464
195	if (!req)	465	if (!req)
196	break;	466	break;
197		467
198	nreqs--;	468	--nreqs;
199		469
200	if (req->type == REQ_QUIT)	470	if (req->type == REQ_QUIT)
201	started--;	471	started--;
		472	else if (req->type == REQ_GROUP && req->length)
		473	{
		474	req->fd = 1; /* mark request as delayed */
		475	continue;
		476	}
202	else	477	else
203	{	478	{
204	int errorno = errno;
205	errno = req->errorno;
206
207	if (req->type == REQ_READ)	479	if (req->type == REQ_READ)
208	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));	480	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
209		481
210	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))	482	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
211	SvREADONLY_off (req->data);	483	SvREADONLY_off (req->data);
…		…
215	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	487	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
216	PL_laststatval = req->result;	488	PL_laststatval = req->result;
217	PL_statcache = *(req->statdata);	489	PL_statcache = *(req->statdata);
218	}	490	}
219		491
220	ENTER;	492	req_invoke (req);
221	PUSHMARK (SP);
222		493
223	if (req->type == REQ_READDIR)
224	{
225	SV *rv = &PL_sv_undef;
226
227	if (req->result >= 0)
228	{
229	char *buf = req->data2ptr;
230	AV *av = newAV ();
231
232	while (req->result)
233	{
234	SV *sv = newSVpv (buf, 0);
235
236	av_push (av, sv);
237	buf += SvCUR (sv) + 1;
238	req->result--;
239	}
240
241	rv = sv_2mortal (newRV_noinc ((SV *)av));
242	}
243
244	XPUSHs (rv);
245	}
246	else
247	{
248	XPUSHs (sv_2mortal (newSViv (req->result)));
249
250	if (req->type == REQ_OPEN)
251	{
252	/* convert fd to fh */
253	SV *fh;
254
255	PUTBACK;
256	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
257	SPAGAIN;
258
259	fh = SvREFCNT_inc (POPs);
260
261	PUSHMARK (SP);
262	XPUSHs (sv_2mortal (fh));
263	}
264	}
265
266	if (SvOK (req->callback) && !req->cancelled)
267	{
268	PUTBACK;
269	call_sv (req->callback, G_VOID \| G_EVAL);
270	SPAGAIN;
271
272	if (SvTRUE (ERRSV))
273	{
274	req_free (req);
275	croak (0);
276	}
277	}
278
279	LEAVE;
280
281	errno = errorno;
282	count++;	494	count++;
283	}	495	}
284		496
285	req_free (req);	497	req_free (req);
286	}	498	}
…		…
288	return count;	500	return count;
289	}	501	}
290		502
291	static void aio_proc(void arg);	503	static void aio_proc(void arg);
292		504
293	static void
294	start_thread (void)	505	static void start_thread (void)
295	{	506	{
296	sigset_t fullsigset, oldsigset;	507	sigset_t fullsigset, oldsigset;
297	pthread_t tid;	508	pthread_t tid;
298	pthread_attr_t attr;	509	pthread_attr_t attr;
299		510
…		…
308	started++;	519	started++;
309		520
310	sigprocmask (SIG_SETMASK, &oldsigset, 0);	521	sigprocmask (SIG_SETMASK, &oldsigset, 0);
311	}	522	}
312		523
313	static void
314	req_send (aio_req req)	524	static void req_send (aio_req req)
315	{	525	{
316	while (started < wanted && nreqs >= started)	526	while (started < wanted && nreqs >= started)
317	start_thread ();	527	start_thread ();
318		528
319	nreqs++;	529	++nreqs;
320		530
321	pthread_mutex_lock (&reqlock);	531	pthread_mutex_lock (&reqlock);
322		532	reqq_push (&req_queue, req);
323	req->next = 0;
324
325	if (reqe)
326	{
327	reqe->next = req;
328	reqe = req;
329	}
330	else
331	reqe = reqs = req;
332
333	pthread_cond_signal (&reqwait);	533	pthread_cond_signal (&reqwait);
334	pthread_mutex_unlock (&reqlock);	534	pthread_mutex_unlock (&reqlock);
335		535
336	if (nreqs > max_outstanding)	536	if (nreqs > max_outstanding)
337	for (;;)	537	for (;;)
…		…
343		543
344	poll_wait ();	544	poll_wait ();
345	}	545	}
346	}	546	}
347		547
348	static void	548	static void end_thread (void)
349	end_thread (void)
350	{	549	{
351	aio_req req;	550	aio_req req;
		551
352	Newz (0, req, 1, aio_cb);	552	Newz (0, req, 1, aio_cb);
		553
353	req->type = REQ_QUIT;	554	req->type = REQ_QUIT;
		555	req->pri = PRI_MAX + PRI_BIAS;
354		556
355	req_send (req);	557	req_send (req);
356	}	558	}
357		559
358	static void min_parallel (int nthreads)	560	static void min_parallel (int nthreads)
…		…
405	* normal read/write by using a mutex. slows down execution a lot,	607	* normal read/write by using a mutex. slows down execution a lot,
406	* but that's your problem, not mine.	608	* but that's your problem, not mine.
407	*/	609	*/
408	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	610	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
409		611
410	static ssize_t	612	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
411	pread (int fd, void *buf, size_t count, off_t offset)
412	{	613	{
413	ssize_t res;	614	ssize_t res;
414	off_t ooffset;	615	off_t ooffset;
415		616
416	pthread_mutex_lock (&preadwritelock);	617	pthread_mutex_lock (&preadwritelock);
…		…
421	pthread_mutex_unlock (&preadwritelock);	622	pthread_mutex_unlock (&preadwritelock);
422		623
423	return res;	624	return res;
424	}	625	}
425		626
426	static ssize_t
427	pwrite (int fd, void *buf, size_t count, off_t offset)	627	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
428	{	628	{
429	ssize_t res;	629	ssize_t res;
430	off_t ooffset;	630	off_t ooffset;
431		631
432	pthread_mutex_lock (&preadwritelock);	632	pthread_mutex_lock (&preadwritelock);
…		…
445	#endif	645	#endif
446		646
447	#if !HAVE_READAHEAD	647	#if !HAVE_READAHEAD
448	# define readahead aio_readahead	648	# define readahead aio_readahead
449		649
450	static ssize_t
451	readahead (int fd, off_t offset, size_t count)	650	static ssize_t readahead (int fd, off_t offset, size_t count)
452	{	651	{
453	char readahead_buf[4096];	652	dBUF;
454		653
455	while (count > 0)	654	while (count > 0)
456	{	655	{
457	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	656	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
458		657
459	pread (fd, readahead_buf, len, offset);	658	pread (fd, aio_buf, len, offset);
460	offset += len;	659	offset += len;
461	count -= len;	660	count -= len;
462	}	661	}
463		662
		663	fBUF;
		664
464	errno = 0;	665	errno = 0;
465	}	666	}
466	#endif	667	#endif
467		668
468	#if !HAVE_READDIR_R	669	#if !HAVE_READDIR_R
469	# define readdir_r aio_readdir_r	670	# define readdir_r aio_readdir_r
470		671
471	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	672	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
472		673
473	static int
474	readdir_r (DIR dirp, struct dirent ent, struct dirent **res)	674	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
475	{	675	{
476	struct dirent *e;	676	struct dirent *e;
477	int errorno;	677	int errorno;
478		678
479	pthread_mutex_lock (&readdirlock);	679	pthread_mutex_lock (&readdirlock);
…		…
495	return e ? 0 : -1;	695	return e ? 0 : -1;
496	}	696	}
497	#endif	697	#endif
498		698
499	/* sendfile always needs emulation */	699	/* sendfile always needs emulation */
500	static ssize_t
501	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	700	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
502	{	701	{
503	ssize_t res;	702	ssize_t res;
504		703
505	if (!count)	704	if (!count)
506	return 0;	705	return 0;
…		…
555	#endif	754	#endif
556	)	755	)
557	)	756	)
558	{	757	{
559	/* emulate sendfile. this is a major pain in the ass */	758	/* emulate sendfile. this is a major pain in the ass */
560	char buf[4096];	759	dBUF;
		760
561	res = 0;	761	res = 0;
562		762
563	while (count)	763	while (count)
564	{	764	{
565	ssize_t cnt;	765	ssize_t cnt;
566		766
567	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	767	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
568		768
569	if (cnt <= 0)	769	if (cnt <= 0)
570	{	770	{
571	if (cnt && !res) res = -1;	771	if (cnt && !res) res = -1;
572	break;	772	break;
573	}	773	}
574		774
575	cnt = write (ofd, buf, cnt);	775	cnt = write (ofd, aio_buf, cnt);
576		776
577	if (cnt <= 0)	777	if (cnt <= 0)
578	{	778	{
579	if (cnt && !res) res = -1;	779	if (cnt && !res) res = -1;
580	break;	780	break;
…		…
582		782
583	offset += cnt;	783	offset += cnt;
584	res += cnt;	784	res += cnt;
585	count -= cnt;	785	count -= cnt;
586	}	786	}
		787
		788	fBUF;
587	}	789	}
588		790
589	return res;	791	return res;
590	}	792	}
591		793
592	/* read a full directory */	794	/* read a full directory */
593	static int
594	scandir_ (const char path, void *namesp)	795	static int scandir_ (const char path, void *namesp)
595	{	796	{
596	DIR *dirp = opendir (path);	797	DIR *dirp;
597	union	798	union
598	{	799	{
599	struct dirent d;	800	struct dirent d;
600	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	801	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
601	} u;	802	} *u;
602	struct dirent *entp;	803	struct dirent *entp;
603	char name, names;	804	char name, names;
604	int memlen = 4096;	805	int memlen = 4096;
605	int memofs = 0;	806	int memofs = 0;
606	int res = 0;	807	int res = 0;
607	int errorno;	808	int errorno;
608		809
		810	dirp = opendir (path);
609	if (!dirp)	811	if (!dirp)
610	return -1;	812	return -1;
611		813
		814	u = malloc (sizeof (*u));
612	names = malloc (memlen);	815	names = malloc (memlen);
613		816
		817	if (u && names)
614	for (;;)	818	for (;;)
615	{	819	{
		820	errno = 0;
616	errno = 0, readdir_r (dirp, &u.d, &entp);	821	readdir_r (dirp, &u->d, &entp);
617		822
618	if (!entp)	823	if (!entp)
619	break;	824	break;
620		825
621	name = entp->d_name;	826	name = entp->d_name;
622		827
623	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))	828	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
624	{	829	{
625	int len = strlen (name) + 1;	830	int len = strlen (name) + 1;
626		831
627	res++;	832	res++;
628		833
629	while (memofs + len > memlen)	834	while (memofs + len > memlen)
630	{	835	{
631	memlen *= 2;	836	memlen *= 2;
632	names = realloc (names, memlen);	837	names = realloc (names, memlen);
633	if (!names)	838	if (!names)
634	break;	839	break;
635	}	840	}
636		841
637	memcpy (names + memofs, name, len);	842	memcpy (names + memofs, name, len);
638	memofs += len;	843	memofs += len;
639	}	844	}
640	}	845	}
641		846
642	errorno = errno;	847	errorno = errno;
		848	free (u);
643	closedir (dirp);	849	closedir (dirp);
644		850
645	if (errorno)	851	if (errorno)
646	{	852	{
647	free (names);	853	free (names);
…		…
653	return res;	859	return res;
654	}	860	}
655		861
656	/*****************************************************************************/	862	/*****************************************************************************/
657		863
658	static void *
659	aio_proc (void *thr_arg)	864	static void aio_proc (void thr_arg)
660	{	865	{
661	aio_req req;	866	aio_req req;
662	int type;	867	int type;
663		868
664	do	869	do
665	{	870	{
666	pthread_mutex_lock (&reqlock);	871	pthread_mutex_lock (&reqlock);
667		872
668	for (;;)	873	for (;;)
669	{	874	{
670	req = reqs;	875	req = reqq_shift (&req_queue);
671
672	if (reqs)
673	{
674	reqs = reqs->next;
675	if (!reqs) reqe = 0;
676	}
677		876
678	if (req)	877	if (req)
679	break;	878	break;
680		879
681	pthread_cond_wait (&reqwait, &reqlock);	880	pthread_cond_wait (&reqwait, &reqlock);
682	}	881	}
683		882
684	pthread_mutex_unlock (&reqlock);	883	pthread_mutex_unlock (&reqlock);
685		884
686	errno = 0; /* strictly unnecessary */	885	errno = 0; /* strictly unnecessary */
		886	type = req->type; /* remember type for QUIT check */
687		887
688	if (!req->cancelled)	888	if (!(req->flags & FLAG_CANCELLED))
689	switch (req->type)	889	switch (type)
690	{	890	{
691	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	891	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
692	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	892	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
693		893
694	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	894	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
…		…
708		908
709	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	909	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
710	case REQ_FSYNC: req->result = fsync (req->fd); break;	910	case REQ_FSYNC: req->result = fsync (req->fd); break;
711	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	911	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
712		912
		913	case REQ_BUSY:
		914	{
		915	struct timeval tv;
		916
		917	tv.tv_sec = req->fd;
		918	tv.tv_usec = req->fd2;
		919
		920	req->result = select (0, 0, 0, 0, &tv);
		921	}
		922
		923	case REQ_GROUP:
		924	case REQ_NOP:
713	case REQ_QUIT:	925	case REQ_QUIT:
714	break;	926	break;
715		927
716	default:	928	default:
717	req->result = ENOSYS;	929	req->result = ENOSYS;
…		…
720		932
721	req->errorno = errno;	933	req->errorno = errno;
722		934
723	pthread_mutex_lock (&reslock);	935	pthread_mutex_lock (&reslock);
724		936
725	req->next = 0;	937	if (!reqq_push (&res_queue, req))
726
727	if (rese)
728	{
729	rese->next = req;
730	rese = req;
731	}
732	else
733	{
734	rese = ress = req;
735
736	/* write a dummy byte to the pipe so fh becomes ready */	938	/* write a dummy byte to the pipe so fh becomes ready */
737	write (respipe [1], &respipe, 1);	939	write (respipe [1], &respipe, 1);
738	}
739		940
740	pthread_mutex_unlock (&reslock);	941	pthread_mutex_unlock (&reslock);
741	}	942	}
742	while (type != REQ_QUIT);	943	while (type != REQ_QUIT);
743		944
…		…
774	{	975	{
775	aio_req prv;	976	aio_req prv;
776		977
777	started = 0;	978	started = 0;
778		979
779	while (reqs)	980	while (prv = reqq_shift (&req_queue))
780	{
781	prv = reqs;
782	reqs = prv->next;
783	req_free (prv);	981	req_free (prv);
784	}
785		982
786	reqs = reqe = 0;	983	while (prv = reqq_shift (&res_queue))
787
788	while (ress)
789	{
790	prv = ress;
791	ress = prv->next;
792	req_free (prv);	984	req_free (prv);
793	}	985
794
795	ress = rese = 0;
796
797	close (respipe [0]);	986	close (respipe [0]);
798	close (respipe [1]);	987	close (respipe [1]);
799	create_pipe ();	988	create_pipe ();
800		989
801	atfork_parent ();	990	atfork_parent ();
802	}	991	}
803		992
804	#define dREQ \	993	#define dREQ \
805	aio_req req; \	994	aio_req req; \
		995	int req_pri = next_pri; \
		996	next_pri = DEFAULT_PRI + PRI_BIAS; \
806	\	997	\
807	if (SvOK (callback) && !SvROK (callback)) \	998	if (SvOK (callback) && !SvROK (callback)) \
808	croak ("callback must be undef or of reference type"); \	999	croak ("callback must be undef or of reference type"); \
809	\	1000	\
810	Newz (0, req, 1, aio_cb); \	1001	Newz (0, req, 1, aio_cb); \
811	if (!req) \	1002	if (!req) \
812	croak ("out of memory during aio_req allocation"); \	1003	croak ("out of memory during aio_req allocation"); \
813	\	1004	\
814	req->callback = newSVsv (callback)	1005	req->callback = newSVsv (callback); \
		1006	req->pri = req_pri
815		1007
816	#define REQ_SEND \	1008	#define REQ_SEND \
817	req_send (req); \	1009	req_send (req); \
818	\	1010	\
819	if (GIMME_V != G_VOID) \	1011	if (GIMME_V != G_VOID) \
…		…
1073		1265
1074	REQ_SEND;	1266	REQ_SEND;
1075	}	1267	}
1076		1268
1077	void	1269	void
		1270	aio_busy (delay,callback=&PL_sv_undef)
		1271	double delay
		1272	SV * callback
		1273	PPCODE:
		1274	{
		1275	dREQ;
		1276
		1277	req->type = REQ_BUSY;
		1278	req->fd = delay < 0. ? 0 : delay;
		1279	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1280
		1281	REQ_SEND;
		1282	}
		1283
		1284	void
1078	aio_group (callback=&PL_sv_undef)	1285	aio_group (callback=&PL_sv_undef)
1079	SV * callback	1286	SV * callback
1080	PROTOTYPE: ;&	1287	PROTOTYPE: ;$
1081	PPCODE:	1288	PPCODE:
1082	{	1289	{
1083	dREQ;	1290	dREQ;
		1291
1084	req->type = REQ_GROUP;	1292	req->type = REQ_GROUP;
		1293	req_send (req);
		1294
1085	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1295	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1086	}	1296	}
		1297
		1298	void
		1299	aio_nop (callback=&PL_sv_undef)
		1300	SV * callback
		1301	PPCODE:
		1302	{
		1303	dREQ;
		1304
		1305	req->type = REQ_NOP;
		1306
		1307	REQ_SEND;
		1308	}
		1309
		1310	void
		1311	aioreq_pri (int pri = DEFAULT_PRI)
		1312	CODE:
		1313	if (pri < PRI_MIN) pri = PRI_MIN;
		1314	if (pri > PRI_MAX) pri = PRI_MAX;
		1315	next_pri = pri + PRI_BIAS;
		1316
		1317	void
		1318	aioreq_nice (int nice = 0)
		1319	CODE:
		1320	nice = next_pri - nice;
		1321	if (nice < PRI_MIN) nice = PRI_MIN;
		1322	if (nice > PRI_MAX) nice = PRI_MAX;
		1323	next_pri = nice + PRI_BIAS;
1087		1324
1088	void	1325	void
1089	flush ()	1326	flush ()
1090	PROTOTYPE:	1327	PROTOTYPE:
1091	CODE:	1328	CODE:
…		…
1134	CODE:	1371	CODE:
1135	RETVAL = nreqs;	1372	RETVAL = nreqs;
1136	OUTPUT:	1373	OUTPUT:
1137	RETVAL	1374	RETVAL
1138		1375
		1376	PROTOTYPES: DISABLE
		1377
1139	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1378	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1140		1379
1141	void	1380	void
1142	cancel (aio_req_ornot req)	1381	cancel (aio_req_ornot req)
1143	PROTOTYPE:
1144	CODE:	1382	CODE:
1145	req->cancelled = 1;	1383	req_cancel (req);
1146		1384
		1385	void
		1386	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1387	CODE:
		1388	SvREFCNT_dec (req->callback);
		1389	req->callback = newSVsv (callback);
		1390
		1391	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1392
		1393	void
		1394	add (aio_req grp, ...)
		1395	PPCODE:
		1396	{
		1397	int i;
		1398	aio_req req;
		1399
		1400	if (grp->fd == 2)
		1401	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1402
		1403	for (i = 1; i < items; ++i )
		1404	{
		1405	if (GIMME_V != G_VOID)
		1406	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1407
		1408	req = SvAIO_REQ (ST (i));
		1409
		1410	if (req)
		1411	{
		1412	++grp->length;
		1413	req->grp = grp;
		1414
		1415	req->grp_prev = 0;
		1416	req->grp_next = grp->grp_first;
		1417
		1418	if (grp->grp_first)
		1419	grp->grp_first->grp_prev = req;
		1420
		1421	grp->grp_first = req;
		1422	}
		1423	}
		1424	}
		1425
		1426	void
		1427	result (aio_req grp, ...)
		1428	CODE:
		1429	{
		1430	int i;
		1431	AV *av = newAV ();
		1432
		1433	for (i = 1; i < items; ++i )
		1434	av_push (av, newSVsv (ST (i)));
		1435
		1436	SvREFCNT_dec (grp->data);
		1437	grp->data = (SV *)av;
		1438	}
		1439
		1440	void
		1441	limit (aio_req grp, int limit)
		1442	CODE:
		1443	grp->fd2 = limit;
		1444	aio_grp_feed (grp);
		1445
		1446	void
		1447	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1448	CODE:
		1449	{
		1450	SvREFCNT_dec (grp->fh2);
		1451	grp->fh2 = newSVsv (callback);
		1452
		1453	if (grp->fd2 <= 0)
		1454	grp->fd2 = 2;
		1455
		1456	aio_grp_feed (grp);
		1457	}
		1458

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.44 by root, Sat Oct 21 23:20:29 2006 UTC vs. Revision 1.70 by root, Tue Oct 24 15:15:56 2006 UTC

Diff Legend

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.44 by root, Sat Oct 21 23:20:29 2006 UTC vs.
Revision 1.70 by root, Tue Oct 24 15:15:56 2006 UTC