[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 1.69 by root, Tue Oct 24 11:57:30 2006 UTC

…		…
		1	#if __linux
		2	# define _GNU_SOURCE
		3	#endif
		4
1	#define _REENTRANT 1	5	#define _REENTRANT 1
		6
2	#include <errno.h>	7	#include <errno.h>
3		8
4	#include "EXTERN.h"	9	#include "EXTERN.h"
5	#include "perl.h"	10	#include "perl.h"
6	#include "XSUB.h"	11	#include "XSUB.h"
9		14
10	#include <pthread.h>	15	#include <pthread.h>
11		16
12	#include <stddef.h>	17	#include <stddef.h>
13	#include <errno.h>	18	#include <errno.h>
		19	#include <sys/time.h>
		20	#include <sys/select.h>
14	#include <sys/types.h>	21	#include <sys/types.h>
15	#include <sys/stat.h>	22	#include <sys/stat.h>
16	#include <limits.h>	23	#include <limits.h>
17	#include <unistd.h>	24	#include <unistd.h>
18	#include <fcntl.h>	25	#include <fcntl.h>
…		…
39	# define NAME_MAX 4096	46	# define NAME_MAX 4096
40	#endif	47	#endif
41		48
42	#if __ia64	49	#if __ia64
43	# define STACKSIZE 65536	50	# define STACKSIZE 65536
		51	#elif __i386 \|\| __x86_64 /* 16k is unreasonably high :( */
		52	# define STACKSIZE PTHREAD_STACK_MIN
44	#else	53	#else
45	# define STACKSIZE 8192	54	# define STACKSIZE 16384
46	#endif	55	#endif
		56
		57	/* buffer size for various temporary buffers */
		58	#define AIO_BUFSIZE 65536
		59
		60	#define dBUF \
		61	char *aio_buf = malloc (AIO_BUFSIZE); \
		62	if (!aio_buf) \
		63	return -1;
		64
		65	#define fBUF free (aio_buf)
47		66
48	enum {	67	enum {
49	REQ_QUIT,	68	REQ_QUIT,
50	REQ_OPEN, REQ_CLOSE,	69	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	70	REQ_READ, REQ_WRITE, REQ_READAHEAD,
…		…
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	72	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,	73	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	74	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,	75	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,	76	REQ_LINK, REQ_SYMLINK,
58	REQ_GROUP,	77	REQ_GROUP, REQ_NOP,
		78	REQ_BUSY,
59	};	79	};
60		80
61	#define AIO_REQ_KLASS "IO::AIO::REQ"	81	#define AIO_REQ_KLASS "IO::AIO::REQ"
62	#define AIO_GRP_KLASS "IO::AIO::GRP"	82	#define AIO_GRP_KLASS "IO::AIO::GRP"
63		83
64	typedef struct aio_cb	84	typedef struct aio_cb
65	{	85	{
66	struct aio_cb grp, grp_prev, *grp_next;
67
68	struct aio_cb *volatile next;	86	struct aio_cb *volatile next;
69
70	SV self; / the perl counterpart of this request, if any */
71		87
72	SV data, callback;	88	SV data, callback;
73	SV fh, fh2;	89	SV fh, fh2;
74	void dataptr, data2ptr;	90	void dataptr, data2ptr;
75	Stat_t *statdata;	91	Stat_t *statdata;
76	off_t offset;	92	off_t offset;
77	size_t length;	93	size_t length;
78	ssize_t result;	94	ssize_t result;
79		95
		96	STRLEN dataoffset;
80	int type;	97	int type;
81	int fd, fd2;	98	int fd, fd2;
82	int errorno;	99	int errorno;
83	STRLEN dataoffset;
84	mode_t mode; /* open */	100	mode_t mode; /* open */
		101
85	unsigned char cancelled;	102	unsigned char flags;
		103	unsigned char pri;
		104
		105	SV self; / the perl counterpart of this request, if any */
		106	struct aio_cb grp, grp_prev, grp_next, grp_first;
86	} aio_cb;	107	} aio_cb;
		108
		109	enum {
		110	FLAG_CANCELLED = 0x01,
		111	};
87		112
88	typedef aio_cb *aio_req;	113	typedef aio_cb *aio_req;
89	typedef aio_cb *aio_req_ornot;	114	typedef aio_cb *aio_req_ornot;
90	typedef aio_cb *aio_group;	115
		116	enum {
		117	PRI_MIN = -4,
		118	PRI_MAX = 4,
		119
		120	DEFAULT_PRI = 0,
		121	PRI_BIAS = -PRI_MIN,
		122	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		123	};
		124
		125	static int next_pri = DEFAULT_PRI + PRI_BIAS;
91		126
92	static int started, wanted;	127	static int started, wanted;
93	static volatile int nreqs;	128	static volatile int nreqs;
94	static int max_outstanding = 1<<30;	129	static int max_outstanding = 1<<30;
95	static int respipe [2];	130	static int respipe [2];
96		131
		132	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		133	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		134	#else
		135	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		136	#endif
		137
97	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	138	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
98	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	139	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
99	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	140	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
100		141
101	static volatile aio_req reqs, reqe; /* queue start, queue end */	142	/*
102	static volatile aio_req ress, rese; /* queue start, queue end */	143	* a somewhat faster data structure might be nice, but
		144	* with 8 priorities this actually needs <20 insns
		145	* per shift, the most expensive operation.
		146	*/
		147	typedef struct {
		148	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		149	int size;
		150	} reqq;
		151
		152	static reqq req_queue;
		153	static reqq res_queue;
		154
		155	int reqq_push (reqq *q, aio_req req)
		156	{
		157	int pri = req->pri;
		158	req->next = 0;
		159
		160	if (q->qe[pri])
		161	{
		162	q->qe[pri]->next = req;
		163	q->qe[pri] = req;
		164	}
		165	else
		166	q->qe[pri] = q->qs[pri] = req;
		167
		168	return q->size++;
		169	}
		170
		171	aio_req reqq_shift (reqq *q)
		172	{
		173	int pri;
		174
		175	if (!q->size)
		176	return 0;
		177
		178	--q->size;
		179
		180	for (pri = NUM_PRI; pri--; )
		181	{
		182	aio_req req = q->qs[pri];
		183
		184	if (req)
		185	{
		186	if (!(q->qs[pri] = req->next))
		187	q->qe[pri] = 0;
		188
		189	return req;
		190	}
		191	}
		192
		193	abort ();
		194	}
		195
		196	static void req_invoke (aio_req req);
		197	static void req_free (aio_req req);
103		198
104	/* must be called at most once */	199	/* must be called at most once */
105	static SV req_sv (aio_req req, const char klass)	200	static SV req_sv (aio_req req, const char klass)
106	{	201	{
		202	if (!req->self)
		203	{
107	req->self = (SV *)newHV ();	204	req->self = (SV *)newHV ();
108	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	205	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		206	}
109		207
110	return sv_2mortal (sv_bless (newRV_noinc (req->self), gv_stashpv (klass, 1)));	208	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
111	}	209	}
112		210
113	static aio_req SvAIO_REQ (SV sv, const char klass)	211	static aio_req SvAIO_REQ (SV *sv)
114	{	212	{
		213	MAGIC *mg;
		214
115	if (!sv_derived_from (sv, klass) \|\| !SvROK (sv))	215	if (!sv_derived_from (sv, AIO_REQ_KLASS) \|\| !SvROK (sv))
116	croak ("object of class %s expected", klass);	216	croak ("object of class " AIO_REQ_KLASS " expected");
117		217
118	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	218	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
119		219
120	return mg ? (aio_req)mg->mg_ptr : 0;	220	return mg ? (aio_req)mg->mg_ptr : 0;
		221	}
		222
		223	static void aio_grp_feed (aio_req grp)
		224	{
		225	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		226	{
		227	int old_len = grp->length;
		228
		229	if (grp->fh2 && SvOK (grp->fh2))
		230	{
		231	dSP;
		232
		233	ENTER;
		234	SAVETMPS;
		235	PUSHMARK (SP);
		236	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		237	PUTBACK;
		238	call_sv (grp->fh2, G_VOID \| G_EVAL \| G_KEEPERR);
		239	SPAGAIN;
		240	FREETMPS;
		241	LEAVE;
		242	}
		243
		244	/* stop if no progress has been made */
		245	if (old_len == grp->length)
		246	{
		247	SvREFCNT_dec (grp->fh2);
		248	grp->fh2 = 0;
		249	break;
		250	}
		251	}
		252	}
		253
		254	static void aio_grp_dec (aio_req grp)
		255	{
		256	--grp->length;
		257
		258	/* call feeder, if applicable */
		259	aio_grp_feed (grp);
		260
		261	/* finish, if done */
		262	if (!grp->length && grp->fd)
		263	{
		264	req_invoke (grp);
		265	req_free (grp);
		266	}
		267	}
		268
		269	static void poll_wait ()
		270	{
		271	fd_set rfd;
		272
		273	while (nreqs)
		274	{
		275	int size;
		276	#if !(__i386 \|\| __x86_64) /* safe without sempahore on this archs */
		277	pthread_mutex_lock (&reslock);
		278	#endif
		279	size = res_queue.size;
		280	#if !(__i386 \|\| __x86_64) /* safe without sempahore on this archs */
		281	pthread_mutex_unlock (&reslock);
		282	#endif
		283
		284	if (size)
		285	return;
		286
		287	FD_ZERO(&rfd);
		288	FD_SET(respipe [0], &rfd);
		289
		290	select (respipe [0] + 1, &rfd, 0, 0, 0);
		291	}
		292	}
		293
		294	static void req_invoke (aio_req req)
		295	{
		296	dSP;
		297
		298	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		299	{
		300	errno = req->errorno;
		301
		302	ENTER;
		303	SAVETMPS;
		304	PUSHMARK (SP);
		305	EXTEND (SP, 1);
		306
		307	switch (req->type)
		308	{
		309	case REQ_READDIR:
		310	{
		311	SV *rv = &PL_sv_undef;
		312
		313	if (req->result >= 0)
		314	{
		315	char *buf = req->data2ptr;
		316	AV *av = newAV ();
		317
		318	while (req->result)
		319	{
		320	SV *sv = newSVpv (buf, 0);
		321
		322	av_push (av, sv);
		323	buf += SvCUR (sv) + 1;
		324	req->result--;
		325	}
		326
		327	rv = sv_2mortal (newRV_noinc ((SV *)av));
		328	}
		329
		330	PUSHs (rv);
		331	}
		332	break;
		333
		334	case REQ_OPEN:
		335	{
		336	/* convert fd to fh */
		337	SV *fh;
		338
		339	PUSHs (sv_2mortal (newSViv (req->result)));
		340	PUTBACK;
		341	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		342	SPAGAIN;
		343
		344	fh = SvREFCNT_inc (POPs);
		345
		346	PUSHMARK (SP);
		347	XPUSHs (sv_2mortal (fh));
		348	}
		349	break;
		350
		351	case REQ_GROUP:
		352	req->fd = 2; /* mark group as finished */
		353
		354	if (req->data)
		355	{
		356	int i;
		357	AV av = (AV )req->data;
		358
		359	EXTEND (SP, AvFILL (av) + 1);
		360	for (i = 0; i <= AvFILL (av); ++i)
		361	PUSHs (*av_fetch (av, i, 0));
		362	}
		363	break;
		364
		365	case REQ_NOP:
		366	case REQ_BUSY:
		367	break;
		368
		369	default:
		370	PUSHs (sv_2mortal (newSViv (req->result)));
		371	break;
		372	}
		373
		374
		375	PUTBACK;
		376	call_sv (req->callback, G_VOID \| G_EVAL);
		377	SPAGAIN;
		378
		379	FREETMPS;
		380	LEAVE;
		381	}
		382
		383	if (req->grp)
		384	{
		385	aio_req grp = req->grp;
		386
		387	/* unlink request */
		388	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		389	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		390
		391	if (grp->grp_first == req)
		392	grp->grp_first = req->grp_next;
		393
		394	aio_grp_dec (grp);
		395	}
		396
		397	if (SvTRUE (ERRSV))
		398	{
		399	req_free (req);
		400	croak (0);
		401	}
121	}	402	}
122		403
123	static void req_free (aio_req req)	404	static void req_free (aio_req req)
124	{	405	{
125	if (req->self)	406	if (req->self)
126	{	407	{
127	sv_unmagic (req->self, PERL_MAGIC_ext);	408	sv_unmagic (req->self, PERL_MAGIC_ext);
128	SvREFCNT_dec (req->self);	409	SvREFCNT_dec (req->self);
129	}	410	}
130		411
131	if (req->data)
132	SvREFCNT_dec (req->data);	412	SvREFCNT_dec (req->data);
133
134	if (req->fh)
135	SvREFCNT_dec (req->fh);	413	SvREFCNT_dec (req->fh);
136
137	if (req->fh2)
138	SvREFCNT_dec (req->fh2);	414	SvREFCNT_dec (req->fh2);
139
140	if (req->statdata)
141	Safefree (req->statdata);
142
143	if (req->callback)
144	SvREFCNT_dec (req->callback);	415	SvREFCNT_dec (req->callback);
		416	Safefree (req->statdata);
145		417
146	if (req->type == REQ_READDIR && req->result >= 0)	418	if (req->type == REQ_READDIR && req->result >= 0)
147	free (req->data2ptr);	419	free (req->data2ptr);
148		420
149	Safefree (req);	421	Safefree (req);
150	}	422	}
151		423
152	static void	424	static void req_cancel (aio_req req)
153	poll_wait ()
154	{	425	{
155	if (nreqs && !ress)	426	req->flags \|= FLAG_CANCELLED;
156	{
157	fd_set rfd;
158	FD_ZERO(&rfd);
159	FD_SET(respipe [0], &rfd);
160		427
161	select (respipe [0] + 1, &rfd, 0, 0, 0);	428	if (req->type == REQ_GROUP)
162	}	429	{
163	}	430	aio_req sub;
164		431
165	static int	432	for (sub = req->grp_first; sub; sub = sub->grp_next)
166	poll_cb ()	433	req_cancel (sub);
		434	}
		435	}
		436
		437	static int poll_cb ()
167	{	438	{
168	dSP;	439	dSP;
169	int count = 0;	440	int count = 0;
170	int do_croak = 0;	441	int do_croak = 0;
171	aio_req req;	442	aio_req req;
172		443
173	for (;;)	444	for (;;)
174	{	445	{
175	pthread_mutex_lock (&reslock);	446	pthread_mutex_lock (&reslock);
176	req = ress;	447	req = reqq_shift (&res_queue);
177		448
178	if (req)	449	if (req)
179	{	450	{
180	ress = req->next;
181
182	if (!ress)	451	if (!res_queue.size)
183	{	452	{
184	/* read any signals sent by the worker threads */	453	/* read any signals sent by the worker threads */
185	char buf [32];	454	char buf [32];
186	while (read (respipe [0], buf, 32) == 32)	455	while (read (respipe [0], buf, 32) == 32)
187	;	456	;
188
189	rese = 0;
190	}	457	}
191	}	458	}
192		459
193	pthread_mutex_unlock (&reslock);	460	pthread_mutex_unlock (&reslock);
194		461
195	if (!req)	462	if (!req)
196	break;	463	break;
197		464
198	nreqs--;	465	--nreqs;
199		466
200	if (req->type == REQ_QUIT)	467	if (req->type == REQ_QUIT)
201	started--;	468	started--;
		469	else if (req->type == REQ_GROUP && req->length)
		470	{
		471	req->fd = 1; /* mark request as delayed */
		472	continue;
		473	}
202	else	474	else
203	{	475	{
204	int errorno = errno;
205	errno = req->errorno;
206
207	if (req->type == REQ_READ)	476	if (req->type == REQ_READ)
208	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));	477	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
209		478
210	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))	479	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
211	SvREADONLY_off (req->data);	480	SvREADONLY_off (req->data);
…		…
215	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	484	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
216	PL_laststatval = req->result;	485	PL_laststatval = req->result;
217	PL_statcache = *(req->statdata);	486	PL_statcache = *(req->statdata);
218	}	487	}
219		488
220	ENTER;	489	req_invoke (req);
221	PUSHMARK (SP);
222		490
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++;	491	count++;
283	}	492	}
284		493
285	req_free (req);	494	req_free (req);
286	}	495	}
…		…
288	return count;	497	return count;
289	}	498	}
290		499
291	static void aio_proc(void arg);	500	static void aio_proc(void arg);
292		501
293	static void
294	start_thread (void)	502	static void start_thread (void)
295	{	503	{
296	sigset_t fullsigset, oldsigset;	504	sigset_t fullsigset, oldsigset;
297	pthread_t tid;	505	pthread_t tid;
298	pthread_attr_t attr;	506	pthread_attr_t attr;
299		507
…		…
308	started++;	516	started++;
309		517
310	sigprocmask (SIG_SETMASK, &oldsigset, 0);	518	sigprocmask (SIG_SETMASK, &oldsigset, 0);
311	}	519	}
312		520
313	static void
314	req_send (aio_req req)	521	static void req_send (aio_req req)
315	{	522	{
316	while (started < wanted && nreqs >= started)	523	while (started < wanted && nreqs >= started)
317	start_thread ();	524	start_thread ();
318		525
319	nreqs++;	526	++nreqs;
320		527
321	pthread_mutex_lock (&reqlock);	528	pthread_mutex_lock (&reqlock);
322		529	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);	530	pthread_cond_signal (&reqwait);
334	pthread_mutex_unlock (&reqlock);	531	pthread_mutex_unlock (&reqlock);
335		532
336	if (nreqs > max_outstanding)	533	if (nreqs > max_outstanding)
337	for (;;)	534	for (;;)
…		…
343		540
344	poll_wait ();	541	poll_wait ();
345	}	542	}
346	}	543	}
347		544
348	static void	545	static void end_thread (void)
349	end_thread (void)
350	{	546	{
351	aio_req req;	547	aio_req req;
		548
352	Newz (0, req, 1, aio_cb);	549	Newz (0, req, 1, aio_cb);
		550
353	req->type = REQ_QUIT;	551	req->type = REQ_QUIT;
		552	req->pri = PRI_MAX + PRI_BIAS;
354		553
355	req_send (req);	554	req_send (req);
356	}	555	}
357		556
358	static void min_parallel (int nthreads)	557	static void min_parallel (int nthreads)
…		…
405	* normal read/write by using a mutex. slows down execution a lot,	604	* normal read/write by using a mutex. slows down execution a lot,
406	* but that's your problem, not mine.	605	* but that's your problem, not mine.
407	*/	606	*/
408	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	607	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
409		608
410	static ssize_t	609	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	{	610	{
413	ssize_t res;	611	ssize_t res;
414	off_t ooffset;	612	off_t ooffset;
415		613
416	pthread_mutex_lock (&preadwritelock);	614	pthread_mutex_lock (&preadwritelock);
…		…
421	pthread_mutex_unlock (&preadwritelock);	619	pthread_mutex_unlock (&preadwritelock);
422		620
423	return res;	621	return res;
424	}	622	}
425		623
426	static ssize_t
427	pwrite (int fd, void *buf, size_t count, off_t offset)	624	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
428	{	625	{
429	ssize_t res;	626	ssize_t res;
430	off_t ooffset;	627	off_t ooffset;
431		628
432	pthread_mutex_lock (&preadwritelock);	629	pthread_mutex_lock (&preadwritelock);
…		…
445	#endif	642	#endif
446		643
447	#if !HAVE_READAHEAD	644	#if !HAVE_READAHEAD
448	# define readahead aio_readahead	645	# define readahead aio_readahead
449		646
450	static ssize_t
451	readahead (int fd, off_t offset, size_t count)	647	static ssize_t readahead (int fd, off_t offset, size_t count)
452	{	648	{
453	char readahead_buf[4096];	649	dBUF;
454		650
455	while (count > 0)	651	while (count > 0)
456	{	652	{
457	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	653	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
458		654
459	pread (fd, readahead_buf, len, offset);	655	pread (fd, aio_buf, len, offset);
460	offset += len;	656	offset += len;
461	count -= len;	657	count -= len;
462	}	658	}
463		659
		660	fBUF;
		661
464	errno = 0;	662	errno = 0;
465	}	663	}
466	#endif	664	#endif
467		665
468	#if !HAVE_READDIR_R	666	#if !HAVE_READDIR_R
469	# define readdir_r aio_readdir_r	667	# define readdir_r aio_readdir_r
470		668
471	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	669	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
472		670
473	static int
474	readdir_r (DIR dirp, struct dirent ent, struct dirent **res)	671	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
475	{	672	{
476	struct dirent *e;	673	struct dirent *e;
477	int errorno;	674	int errorno;
478		675
479	pthread_mutex_lock (&readdirlock);	676	pthread_mutex_lock (&readdirlock);
…		…
495	return e ? 0 : -1;	692	return e ? 0 : -1;
496	}	693	}
497	#endif	694	#endif
498		695
499	/* sendfile always needs emulation */	696	/* sendfile always needs emulation */
500	static ssize_t
501	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	697	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
502	{	698	{
503	ssize_t res;	699	ssize_t res;
504		700
505	if (!count)	701	if (!count)
506	return 0;	702	return 0;
…		…
555	#endif	751	#endif
556	)	752	)
557	)	753	)
558	{	754	{
559	/* emulate sendfile. this is a major pain in the ass */	755	/* emulate sendfile. this is a major pain in the ass */
560	char buf[4096];	756	dBUF;
		757
561	res = 0;	758	res = 0;
562		759
563	while (count)	760	while (count)
564	{	761	{
565	ssize_t cnt;	762	ssize_t cnt;
566		763
567	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	764	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
568		765
569	if (cnt <= 0)	766	if (cnt <= 0)
570	{	767	{
571	if (cnt && !res) res = -1;	768	if (cnt && !res) res = -1;
572	break;	769	break;
573	}	770	}
574		771
575	cnt = write (ofd, buf, cnt);	772	cnt = write (ofd, aio_buf, cnt);
576		773
577	if (cnt <= 0)	774	if (cnt <= 0)
578	{	775	{
579	if (cnt && !res) res = -1;	776	if (cnt && !res) res = -1;
580	break;	777	break;
…		…
582		779
583	offset += cnt;	780	offset += cnt;
584	res += cnt;	781	res += cnt;
585	count -= cnt;	782	count -= cnt;
586	}	783	}
		784
		785	fBUF;
587	}	786	}
588		787
589	return res;	788	return res;
590	}	789	}
591		790
592	/* read a full directory */	791	/* read a full directory */
593	static int
594	scandir_ (const char path, void *namesp)	792	static int scandir_ (const char path, void *namesp)
595	{	793	{
596	DIR *dirp = opendir (path);	794	DIR *dirp;
597	union	795	union
598	{	796	{
599	struct dirent d;	797	struct dirent d;
600	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	798	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
601	} u;	799	} *u;
602	struct dirent *entp;	800	struct dirent *entp;
603	char name, names;	801	char name, names;
604	int memlen = 4096;	802	int memlen = 4096;
605	int memofs = 0;	803	int memofs = 0;
606	int res = 0;	804	int res = 0;
607	int errorno;	805	int errorno;
608		806
		807	dirp = opendir (path);
609	if (!dirp)	808	if (!dirp)
610	return -1;	809	return -1;
611		810
		811	u = malloc (sizeof (*u));
612	names = malloc (memlen);	812	names = malloc (memlen);
613		813
		814	if (u && names)
614	for (;;)	815	for (;;)
615	{	816	{
		817	errno = 0;
616	errno = 0, readdir_r (dirp, &u.d, &entp);	818	readdir_r (dirp, &u->d, &entp);
617		819
618	if (!entp)	820	if (!entp)
619	break;	821	break;
620		822
621	name = entp->d_name;	823	name = entp->d_name;
622		824
623	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))	825	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
624	{	826	{
625	int len = strlen (name) + 1;	827	int len = strlen (name) + 1;
626		828
627	res++;	829	res++;
628		830
629	while (memofs + len > memlen)	831	while (memofs + len > memlen)
630	{	832	{
631	memlen *= 2;	833	memlen *= 2;
632	names = realloc (names, memlen);	834	names = realloc (names, memlen);
633	if (!names)	835	if (!names)
634	break;	836	break;
635	}	837	}
636		838
637	memcpy (names + memofs, name, len);	839	memcpy (names + memofs, name, len);
638	memofs += len;	840	memofs += len;
639	}	841	}
640	}	842	}
641		843
642	errorno = errno;	844	errorno = errno;
		845	free (u);
643	closedir (dirp);	846	closedir (dirp);
644		847
645	if (errorno)	848	if (errorno)
646	{	849	{
647	free (names);	850	free (names);
…		…
653	return res;	856	return res;
654	}	857	}
655		858
656	/*****************************************************************************/	859	/*****************************************************************************/
657		860
658	static void *
659	aio_proc (void *thr_arg)	861	static void aio_proc (void thr_arg)
660	{	862	{
661	aio_req req;	863	aio_req req;
662	int type;	864	int type;
663		865
664	do	866	do
665	{	867	{
666	pthread_mutex_lock (&reqlock);	868	pthread_mutex_lock (&reqlock);
667		869
668	for (;;)	870	for (;;)
669	{	871	{
670	req = reqs;	872	req = reqq_shift (&req_queue);
671
672	if (reqs)
673	{
674	reqs = reqs->next;
675	if (!reqs) reqe = 0;
676	}
677		873
678	if (req)	874	if (req)
679	break;	875	break;
680		876
681	pthread_cond_wait (&reqwait, &reqlock);	877	pthread_cond_wait (&reqwait, &reqlock);
682	}	878	}
683		879
684	pthread_mutex_unlock (&reqlock);	880	pthread_mutex_unlock (&reqlock);
685		881
686	errno = 0; /* strictly unnecessary */	882	errno = 0; /* strictly unnecessary */
		883	type = req->type; /* remember type for QUIT check */
687		884
688	if (!req->cancelled)	885	if (!(req->flags & FLAG_CANCELLED))
689	switch (req->type)	886	switch (type)
690	{	887	{
691	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	888	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;	889	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
693		890
694	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	891	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
…		…
708		905
709	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	906	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
710	case REQ_FSYNC: req->result = fsync (req->fd); break;	907	case REQ_FSYNC: req->result = fsync (req->fd); break;
711	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	908	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
712		909
		910	case REQ_BUSY:
		911	{
		912	struct timeval tv;
		913
		914	tv.tv_sec = req->fd;
		915	tv.tv_usec = req->fd2;
		916
		917	req->result = select (0, 0, 0, 0, &tv);
		918	}
		919
		920	case REQ_GROUP:
		921	case REQ_NOP:
713	case REQ_QUIT:	922	case REQ_QUIT:
714	break;	923	break;
715		924
716	default:	925	default:
717	req->result = ENOSYS;	926	req->result = ENOSYS;
…		…
720		929
721	req->errorno = errno;	930	req->errorno = errno;
722		931
723	pthread_mutex_lock (&reslock);	932	pthread_mutex_lock (&reslock);
724		933
725	req->next = 0;	934	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 */	935	/* write a dummy byte to the pipe so fh becomes ready */
737	write (respipe [1], &respipe, 1);	936	write (respipe [1], &respipe, 1);
738	}
739		937
740	pthread_mutex_unlock (&reslock);	938	pthread_mutex_unlock (&reslock);
741	}	939	}
742	while (type != REQ_QUIT);	940	while (type != REQ_QUIT);
743		941
…		…
774	{	972	{
775	aio_req prv;	973	aio_req prv;
776		974
777	started = 0;	975	started = 0;
778		976
779	while (reqs)	977	while (prv = reqq_shift (&req_queue))
780	{
781	prv = reqs;
782	reqs = prv->next;
783	req_free (prv);	978	req_free (prv);
784	}
785		979
786	reqs = reqe = 0;	980	while (prv = reqq_shift (&res_queue))
787
788	while (ress)
789	{
790	prv = ress;
791	ress = prv->next;
792	req_free (prv);	981	req_free (prv);
793	}	982
794
795	ress = rese = 0;
796
797	close (respipe [0]);	983	close (respipe [0]);
798	close (respipe [1]);	984	close (respipe [1]);
799	create_pipe ();	985	create_pipe ();
800		986
801	atfork_parent ();	987	atfork_parent ();
802	}	988	}
803		989
804	#define dREQ \	990	#define dREQ \
805	aio_req req; \	991	aio_req req; \
		992	int req_pri = next_pri; \
		993	next_pri = DEFAULT_PRI + PRI_BIAS; \
806	\	994	\
807	if (SvOK (callback) && !SvROK (callback)) \	995	if (SvOK (callback) && !SvROK (callback)) \
808	croak ("callback must be undef or of reference type"); \	996	croak ("callback must be undef or of reference type"); \
809	\	997	\
810	Newz (0, req, 1, aio_cb); \	998	Newz (0, req, 1, aio_cb); \
811	if (!req) \	999	if (!req) \
812	croak ("out of memory during aio_req allocation"); \	1000	croak ("out of memory during aio_req allocation"); \
813	\	1001	\
814	req->callback = newSVsv (callback)	1002	req->callback = newSVsv (callback); \
		1003	req->pri = req_pri
815		1004
816	#define REQ_SEND \	1005	#define REQ_SEND \
817	req_send (req); \	1006	req_send (req); \
818	\	1007	\
819	if (GIMME_V != G_VOID) \	1008	if (GIMME_V != G_VOID) \
…		…
1073		1262
1074	REQ_SEND;	1263	REQ_SEND;
1075	}	1264	}
1076		1265
1077	void	1266	void
		1267	aio_busy (delay,callback=&PL_sv_undef)
		1268	double delay
		1269	SV * callback
		1270	PPCODE:
		1271	{
		1272	dREQ;
		1273
		1274	req->type = REQ_BUSY;
		1275	req->fd = delay < 0. ? 0 : delay;
		1276	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1277
		1278	REQ_SEND;
		1279	}
		1280
		1281	void
1078	aio_group (callback=&PL_sv_undef)	1282	aio_group (callback=&PL_sv_undef)
1079	SV * callback	1283	SV * callback
1080	PROTOTYPE: ;&	1284	PROTOTYPE: ;$
1081	PPCODE:	1285	PPCODE:
1082	{	1286	{
1083	dREQ;	1287	dREQ;
		1288
1084	req->type = REQ_GROUP;	1289	req->type = REQ_GROUP;
		1290	req_send (req);
		1291
1085	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1292	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1086	}	1293	}
		1294
		1295	void
		1296	aio_nop (callback=&PL_sv_undef)
		1297	SV * callback
		1298	PPCODE:
		1299	{
		1300	dREQ;
		1301
		1302	req->type = REQ_NOP;
		1303
		1304	REQ_SEND;
		1305	}
		1306
		1307	void
		1308	aioreq_pri (int pri = DEFAULT_PRI)
		1309	CODE:
		1310	if (pri < PRI_MIN) pri = PRI_MIN;
		1311	if (pri > PRI_MAX) pri = PRI_MAX;
		1312	next_pri = pri + PRI_BIAS;
		1313
		1314	void
		1315	aioreq_nice (int nice = 0)
		1316	CODE:
		1317	nice = next_pri - nice;
		1318	if (nice < PRI_MIN) nice = PRI_MIN;
		1319	if (nice > PRI_MAX) nice = PRI_MAX;
		1320	next_pri = nice + PRI_BIAS;
1087		1321
1088	void	1322	void
1089	flush ()	1323	flush ()
1090	PROTOTYPE:	1324	PROTOTYPE:
1091	CODE:	1325	CODE:
…		…
1134	CODE:	1368	CODE:
1135	RETVAL = nreqs;	1369	RETVAL = nreqs;
1136	OUTPUT:	1370	OUTPUT:
1137	RETVAL	1371	RETVAL
1138		1372
		1373	PROTOTYPES: DISABLE
		1374
1139	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1375	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1140		1376
1141	void	1377	void
1142	cancel (aio_req_ornot req)	1378	cancel (aio_req_ornot req)
1143	PROTOTYPE:
1144	CODE:	1379	CODE:
1145	req->cancelled = 1;	1380	req_cancel (req);
1146		1381
		1382	void
		1383	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1384	CODE:
		1385	SvREFCNT_dec (req->callback);
		1386	req->callback = newSVsv (callback);
		1387
		1388	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1389
		1390	void
		1391	add (aio_req grp, ...)
		1392	PPCODE:
		1393	{
		1394	int i;
		1395	aio_req req;
		1396
		1397	if (grp->fd == 2)
		1398	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1399
		1400	for (i = 1; i < items; ++i )
		1401	{
		1402	if (GIMME_V != G_VOID)
		1403	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1404
		1405	req = SvAIO_REQ (ST (i));
		1406
		1407	if (req)
		1408	{
		1409	++grp->length;
		1410	req->grp = grp;
		1411
		1412	req->grp_prev = 0;
		1413	req->grp_next = grp->grp_first;
		1414
		1415	if (grp->grp_first)
		1416	grp->grp_first->grp_prev = req;
		1417
		1418	grp->grp_first = req;
		1419	}
		1420	}
		1421	}
		1422
		1423	void
		1424	result (aio_req grp, ...)
		1425	CODE:
		1426	{
		1427	int i;
		1428	AV *av = newAV ();
		1429
		1430	for (i = 1; i < items; ++i )
		1431	av_push (av, newSVsv (ST (i)));
		1432
		1433	SvREFCNT_dec (grp->data);
		1434	grp->data = (SV *)av;
		1435	}
		1436
		1437	void
		1438	limit (aio_req grp, int limit)
		1439	CODE:
		1440	grp->fd2 = limit;
		1441	aio_grp_feed (grp);
		1442
		1443	void
		1444	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1445	CODE:
		1446	{
		1447	SvREFCNT_dec (grp->fh2);
		1448	grp->fh2 = newSVsv (callback);
		1449
		1450	if (grp->fd2 <= 0)
		1451	grp->fd2 = 2;
		1452
		1453	aio_grp_feed (grp);
		1454	}
		1455

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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 1.69 by root, Tue Oct 24 11:57:30 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 1.69 by root, Tue Oct 24 11:57:30 2006 UTC