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

Comparing Linux-AIO/AIO.xs (file contents):
Revision 1.7 by root, Wed Aug 15 03:24:08 2001 UTC vs.
Revision 1.23 by root, Wed Jun 29 15:28:14 2005 UTC

…		…
		1	#define PERL_NO_GET_CONTEXT
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include <sys/types.h>	7	#include <sys/types.h>
		8	#include <sys/stat.h>
6	#include <unistd.h>	9	#include <unistd.h>
7	#include <fcntl.h>	10	#include <fcntl.h>
		11	#include <signal.h>
8	#include <sched.h>	12	#include <sched.h>
9		13
10	#define STACKSIZE 4096 /* yeah */	14	typedef void InputStream; / hack, but 5.6.1 is simply toooo old ;) */
		15	typedef void OutputStream; / hack, but 5.6.1 is simply toooo old ;) */
		16	typedef void InOutStream; / hack, but 5.6.1 is simply toooo old ;) */
11		17
12	#define REQ_QUIT 0	18	#define STACKSIZE (128 * sizeof (long)) /* yeah */
13	#define REQ_READ 1	19
14	#define REQ_WRITE 2	20	enum {
		21	REQ_QUIT,
		22	REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE,
		23	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK
		24	};
15		25
16	typedef struct {	26	typedef struct {
17	char stack[STACKSIZE];	27	char stack[STACKSIZE];
18	} aio_thread;	28	} aio_thread;
19		29
20	typedef struct {	30	typedef struct aio_cb {
		31	struct aio_cb *next;
		32
21	int type;	33	int type;
22	aio_thread *thread;	34	aio_thread *thread;
23		35
24	/* read/write */
25	int fd;	36	int fd;
26	off_t offset;	37	off_t offset;
27	size_t length;	38	size_t length;
28	ssize_t result;	39	ssize_t result;
		40	mode_t mode; /* open */
29	int errorno;	41	int errorno;
30
31	SV data, callback;	42	SV data, callback;
32	void *dataptr;	43	void *dataptr;
33	STRLEN dataoffset;	44	STRLEN dataoffset;
		45
		46	Stat_t *statdata;
34	} aio_cb;	47	} aio_cb;
35		48
36	typedef aio_cb *aio_req;	49	typedef aio_cb *aio_req;
37		50
38	static int started;	51	static int started;
39	static int nreqs;	52	static int nreqs;
40	static int reqpipe[2], respipe[2];	53	static int reqpipe[2], respipe[2];
41		54
		55	static aio_req qs, qe; /* queue start, queue end */
		56
42	static int aio_proc(void *arg);	57	static int aio_proc(void *arg);
43		58
44	static void	59	static void
45	start_thread(void)	60	start_thread (void)
46	{	61	{
47	aio_thread *thr;	62	aio_thread *thr;
48		63
49	New (0, thr, 1, aio_thread);	64	New (0, thr, 1, aio_thread);
50		65
51	if (clone (aio_proc,	66	if (clone (aio_proc,
52	&(thr->stack[STACKSIZE]),	67	&(thr->stack[STACKSIZE - sizeof (long)]),
53	CLONE_VM\|CLONE_FS\|CLONE_FILES\|CLONE_SIGHAND,	68	CLONE_VM\|CLONE_FS\|CLONE_FILES,
54	thr) >= 0)	69	thr) >= 0)
55	started++;	70	started++;
56	else	71	else
57	Safefree (thr);	72	Safefree (thr);
58	}	73	}
59		74
60	static void	75	static void
		76	send_reqs (void)
		77	{
		78	/* this write is atomic */
		79	while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
		80	{
		81	qs = qs->next;
		82	if (!qs) qe = 0;
		83	}
		84	}
		85
		86	static void
		87	send_req (aio_req req)
		88	{
		89	nreqs++;
		90	req->next = 0;
		91
		92	if (qe)
		93	{
		94	qe->next = req;
		95	qe = req;
		96	}
		97	else
		98	qe = qs = req;
		99
		100	send_reqs ();
		101	}
		102
		103	static void
61	end_thread(void)	104	end_thread (void)
62	{	105	{
63	aio_req req;	106	aio_req req;
64	New (0, req, 1, aio_cb);	107	New (0, req, 1, aio_cb);
65	req->type = REQ_QUIT;	108	req->type = REQ_QUIT;
66	write (reqpipe[1], &req, sizeof (aio_req));	109
		110	send_req (req);
67	}	111	}
68		112
69	static void	113	static void
		114	read_write (pTHX_
70	read_write (pTHX_ int dowrite, int fd, off_t offset, size_t length,	115	int dowrite, int fd, off_t offset, size_t length,
71	SV data, STRLEN dataoffset, SVcallback)	116	SV data, STRLEN dataoffset, SV callback)
72	{	117	{
73	aio_req req;	118	aio_req req;
74	STRLEN svlen;	119	STRLEN svlen;
75	char *svptr = SvPV (data, svlen);	120	char *svptr = SvPV (data, svlen);
		121
		122	SvUPGRADE (data, SVt_PV);
		123	SvPOK_on (data);
76		124
77	if (dataoffset < 0)	125	if (dataoffset < 0)
78	dataoffset += svlen;	126	dataoffset += svlen;
79		127
80	if (dataoffset < 0 \|\| dataoffset > svlen)	128	if (dataoffset < 0 \|\| dataoffset > svlen)
93	}	141	}
94		142
95	if (length < 0)	143	if (length < 0)
96	croak ("length must not be negative");	144	croak ("length must not be negative");
97		145
98	New (0, req, 1, aio_cb);	146	Newz (0, req, 1, aio_cb);
99		147
100	if (!req)	148	if (!req)
101	croak ("out of memory during aio_req allocation");	149	croak ("out of memory during aio_req allocation");
102		150
103	req->type = dowrite ? REQ_WRITE : REQ_READ;	151	req->type = dowrite ? REQ_WRITE : REQ_READ;
…		…
106	req->length = length;	154	req->length = length;
107	req->data = SvREFCNT_inc (data);	155	req->data = SvREFCNT_inc (data);
108	req->dataptr = (char *)svptr + dataoffset;	156	req->dataptr = (char *)svptr + dataoffset;
109	req->callback = SvREFCNT_inc (callback);	157	req->callback = SvREFCNT_inc (callback);
110		158
111	nreqs++;	159	send_req (req);
112	write (reqpipe[1], &req, sizeof (aio_req));	160	}
		161
		162	static void
		163	poll_wait ()
		164	{
		165	fd_set rfd;
		166	FD_ZERO(&rfd);
		167	FD_SET(respipe[0], &rfd);
		168
		169	select (respipe[0] + 1, &rfd, 0, 0, 0);
113	}	170	}
114		171
115	static int	172	static int
116	poll_cb (pTHX)	173	poll_cb (pTHX)
117	{	174	{
…		…
119	int count = 0;	176	int count = 0;
120	aio_req req;	177	aio_req req;
121		178
122	while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))	179	while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))
123	{	180	{
		181	nreqs--;
		182
124	if (req->type == REQ_QUIT)	183	if (req->type == REQ_QUIT)
125	{	184	{
126	Safefree (req->thread);	185	Safefree (req->thread);
127	started--;	186	started--;
128	}	187	}
…		…
133		192
134	if (req->type == REQ_READ)	193	if (req->type == REQ_READ)
135	SvCUR_set (req->data, req->dataoffset	194	SvCUR_set (req->data, req->dataoffset
136	+ req->result > 0 ? req->result : 0);	195	+ req->result > 0 ? req->result : 0);
137		196
		197	if (req->data)
		198	SvREFCNT_dec (req->data);
		199
		200	if (req->type == REQ_STAT \|\| req->type == REQ_LSTAT \|\| req->type == REQ_FSTAT)
		201	{
		202	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		203	PL_laststatval = req->result;
		204	PL_statcache = *(req->statdata);
		205
		206	Safefree (req->statdata);
		207	}
		208
138	PUSHMARK (SP);	209	PUSHMARK (SP);
139	XPUSHs (sv_2mortal (newSViv (req->result)));	210	XPUSHs (sv_2mortal (newSViv (req->result)));
140	PUTBACK;	211	PUTBACK;
141	call_sv (req->callback, G_VOID);	212	call_sv (req->callback, G_VOID);
142	SPAGAIN;	213	SPAGAIN;
143		214
144	SvREFCNT_dec (req->data);	215	if (req->callback)
145	SvREFCNT_dec (req->callback);	216	SvREFCNT_dec (req->callback);
146		217
147	errno = errorno;	218	errno = errorno;
148	nreqs--;
149	count++;	219	count++;
150	}	220	}
151		221
152	Safefree (req);	222	Safefree (req);
153	}	223	}
154		224
		225	if (qs)
		226	send_reqs ();
		227
155	return count;	228	return count;
156	}	229	}
		230
		231	static sigset_t fullsigset;
157		232
158	#undef errno	233	#undef errno
159	#include <asm/unistd.h>	234	#include <asm/unistd.h>
		235	#include <sys/prctl.h>
		236
		237	#define COPY_STATDATA \
		238	req->statdata->st_dev = statdata.st_dev; \
		239	req->statdata->st_ino = statdata.st_ino; \
		240	req->statdata->st_mode = statdata.st_mode; \
		241	req->statdata->st_nlink = statdata.st_nlink; \
		242	req->statdata->st_uid = statdata.st_uid; \
		243	req->statdata->st_gid = statdata.st_gid; \
		244	req->statdata->st_rdev = statdata.st_rdev; \
		245	req->statdata->st_size = statdata.st_size; \
		246	req->statdata->st_atime = statdata.st_atime; \
		247	req->statdata->st_mtime = statdata.st_mtime; \
		248	req->statdata->st_ctime = statdata.st_ctime; \
		249	req->statdata->st_blksize = statdata.st_blksize; \
		250	req->statdata->st_blocks = statdata.st_blocks; \
160		251
161	static int	252	static int
162	aio_proc(void *thr_arg)	253	aio_proc (void *thr_arg)
163	{	254	{
164	aio_thread *thr = thr_arg;	255	aio_thread *thr = thr_arg;
165	int sig;	256	aio_req req;
166	int errno;	257	int errno;
167	aio_req req;
168		258
		259	/* this is very much kernel-specific :(:(:( */
169	/* we rely on gcc's ability to create closures. */	260	/* we rely on gcc's ability to create closures. */
170	_syscall3(int,lseek,int,fd,off_t,offset,int,whence);
171	_syscall3(int,read,int,fd,char *,buf,off_t,count);	261	_syscall3(int,read,int,fd,char *,buf,size_t,count)
172	_syscall3(int,write,int,fd,char *,buf,off_t,count);	262	_syscall3(int,write,int,fd,char *,buf,size_t,count)
173		263
174	/* first get rid of any signals */	264	_syscall3(int,open,char *,pathname,int,flags,mode_t,mode)
175	for (sig = 1; sig < _NSIG; sig++)	265	_syscall1(int,close,int,fd)
176	signal (sig, SIG_DFL);
177		266
178	signal (SIGPIPE, SIG_IGN);	267	#ifdef __NR_pread64
179		268	_syscall5(int,pread64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi)
		269	_syscall5(int,pwrite64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi)
		270	#elif __NR_pread
		271	_syscall4(int,pread,int,fd,char *,buf,size_t,count,offset_t,offset)
		272	_syscall4(int,pwrite,int,fd,char *,buf,size_t,count,offset_t,offset)
		273	#else
		274	# error "neither pread nor pread64 defined"
		275	#endif
		276
		277
		278	#ifdef __NR_stat64
		279	_syscall2(int,stat64, const char , filename, struct stat64 , buf)
		280	_syscall2(int,lstat64, const char , filename, struct stat64 , buf)
		281	_syscall2(int,fstat64, int, fd, struct stat64 *, buf)
		282	#elif __NR_stat
		283	_syscall2(int,stat, const char , filename, struct stat , buf)
		284	_syscall2(int,lstat, const char , filename, struct stat , buf)
		285	_syscall2(int,fstat, int, fd, struct stat *, buf)
		286	#else
		287	# error "neither stat64 nor stat defined"
		288	#endif
		289
		290	_syscall1(int,unlink, char *, filename);
		291
		292	sigprocmask (SIG_SETMASK, &fullsigset, 0);
		293	prctl (PR_SET_PDEATHSIG, SIGKILL);
		294
180	/* then loop */	295	/* then loop */
181	while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))	296	while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
182	{	297	{
183	req->thread = thr;	298	req->thread = thr;
		299	errno = 0; /* strictly unnecessary */
184		300
185	if (req->type == REQ_READ \|\| req->type == REQ_WRITE)	301	switch (req->type)
186	{	302	{
		303	#ifdef __NR_pread64
		304	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break;
		305	case REQ_WRITE: req->result = pwrite64(req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break;
		306	#else
		307	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
		308	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
		309	#endif
		310	#ifdef __NR_stat64
		311	struct stat64 statdata;
		312	case REQ_STAT: req->result = stat64 (req->dataptr, &statdata); COPY_STATDATA; break;
		313	case REQ_LSTAT: req->result = lstat64 (req->dataptr, &statdata); COPY_STATDATA; break;
		314	case REQ_FSTAT: req->result = fstat64 (req->fd, &statdata); COPY_STATDATA; break;
		315	#else
		316	struct stat statdata;
		317	case REQ_STAT: req->result = stat (req->dataptr, &statdata); COPY_STATDATA; break;
		318	case REQ_LSTAT: req->result = lstat (req->dataptr, &statdata); COPY_STATDATA; break;
		319	case REQ_FSTAT: req->result = fstat (req->fd, &statdata); COPY_STATDATA; break;
		320	#endif
		321	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
		322	case REQ_CLOSE: req->result = close (req->fd); break;
		323	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
		324
		325	case REQ_QUIT:
		326	default:
		327	write (respipe[1], (void *)&req, sizeof (req));
187	errno = 0;	328	return 0;
188
189	if (lseek (req->fd, req->offset, SEEK_SET) == req->offset)
190	{
191	if (req->type == REQ_READ)
192	req->result = read (req->fd, req->dataptr, req->length);
193	else
194	req->result = write(req->fd, req->dataptr, req->length);
195	}
196
197	req->errorno = errno;
198	}	329	}
199	else
200	{
201	write (respipe[1], (void *)&req, sizeof (req));
202	break;
203	}
204		330
		331	req->errorno = errno;
205	write (respipe[1], (void *)&req, sizeof (req));	332	write (respipe[1], (void *)&req, sizeof (req));
206	}	333	}
207		334
208	return 0;	335	return 0;
209	}	336	}
210		337
211	MODULE = Linux::AIO PACKAGE = Linux::AIO	338	MODULE = Linux::AIO PACKAGE = Linux::AIO
212		339
213	BOOT:	340	BOOT:
214	{	341	{
		342	sigfillset (&fullsigset);
		343	sigdelset (&fullsigset, SIGTERM);
		344	sigdelset (&fullsigset, SIGQUIT);
		345	sigdelset (&fullsigset, SIGABRT);
		346	sigdelset (&fullsigset, SIGINT);
		347
215	if (pipe (reqpipe) \|\| pipe (respipe))	348	if (pipe (reqpipe) \|\| pipe (respipe))
216	croak ("unable to initialize request or result pipe");	349	croak ("unable to initialize request or result pipe");
		350
		351	if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))
		352	croak ("cannot set result pipe to nonblocking mode");
217		353
218	if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))	354	if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
219	croak ("cannot set result pipe to nonblocking mode");	355	croak ("cannot set result pipe to nonblocking mode");
220	}	356	}
221		357
…		…
237	{	373	{
238	end_thread ();	374	end_thread ();
239	cur--;	375	cur--;
240	}	376	}
241		377
242	poll_cb ();
243	while (started > nthreads)	378	while (started > nthreads)
244	{	379	{
245	sched_yield ();	380	poll_wait ();
246	poll_cb ();	381	poll_cb (aTHX);
247	}	382	}
248		383
249	void	384	void
		385	aio_open(pathname,flags,mode,callback)
		386	SV * pathname
		387	int flags
		388	int mode
		389	SV * callback
		390	PROTOTYPE: $$$$
		391	CODE:
		392	aio_req req;
		393
		394	Newz (0, req, 1, aio_cb);
		395
		396	if (!req)
		397	croak ("out of memory during aio_req allocation");
		398
		399	req->type = REQ_OPEN;
		400	req->data = newSVsv (pathname);
		401	req->dataptr = SvPV_nolen (req->data);
		402	req->fd = flags;
		403	req->mode = mode;
		404	req->callback = SvREFCNT_inc (callback);
		405
		406	send_req (req);
		407
		408	void
		409	aio_close(fh,callback)
		410	InputStream fh
		411	SV * callback
		412	PROTOTYPE: $$
		413	CODE:
		414	aio_req req;
		415
		416	Newz (0, req, 1, aio_cb);
		417
		418	if (!req)
		419	croak ("out of memory during aio_req allocation");
		420
		421	req->type = REQ_CLOSE;
		422	req->fd = PerlIO_fileno (fh);
		423	req->callback = SvREFCNT_inc (callback);
		424
		425	send_req (req);
		426
		427	void
250	aio_read(fh,offset,length,data,dataoffset,callback)	428	aio_read(fh,offset,length,data,dataoffset,callback)
251	PerlIO * fh	429	InputStream fh
252	UV offset	430	UV offset
253	STRLEN length	431	IV length
254	SV * data	432	SV * data
255	STRLEN dataoffset	433	IV dataoffset
256	SV * callback	434	SV * callback
257	PROTOTYPE: $$$$$$	435	PROTOTYPE: $$$$$$
258	ALIAS:	436	CODE:
259	aio_write = 1
260	CODE:
261	SvUPGRADE (data, SVt_PV);
262	SvPOK_on (data);
263	read_write (aTHX_ ix, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);	437	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
		438
		439	void
		440	aio_write(fh,offset,length,data,dataoffset,callback)
		441	OutputStream fh
		442	UV offset
		443	IV length
		444	SV * data
		445	IV dataoffset
		446	SV * callback
		447	PROTOTYPE: $$$$$$
		448	CODE:
		449	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
		450
		451	void
		452	aio_stat(fh_or_path,callback)
		453	SV * fh_or_path
		454	SV * callback
		455	PROTOTYPE: $$
		456	ALIAS:
		457	aio_lstat = 1
		458	CODE:
		459	aio_req req;
		460
		461	Newz (0, req, 1, aio_cb);
		462
		463	if (!req)
		464	croak ("out of memory during aio_req allocation");
		465
		466	New (0, req->statdata, 1, Stat_t);
		467
		468	if (!req->statdata)
		469	croak ("out of memory during aio_req->statdata allocation");
		470
		471	if (SvPOK (fh_or_path))
		472	{
		473	req->type = ix ? REQ_LSTAT : REQ_STAT;
		474	req->data = newSVsv (fh_or_path);
		475	req->dataptr = SvPV_nolen (req->data);
		476	}
		477	else
		478	{
		479	req->type = REQ_FSTAT;
		480	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		481	}
		482
		483	req->callback = SvREFCNT_inc (callback);
		484
		485	send_req (req);
		486
		487	void
		488	aio_unlink(pathname,callback)
		489	SV * pathname
		490	SV * callback
		491	PROTOTYPE: $$
		492	CODE:
		493	aio_req req;
		494
		495	Newz (0, req, 1, aio_cb);
		496
		497	if (!req)
		498	croak ("out of memory during aio_req allocation");
		499
		500	req->type = REQ_UNLINK;
		501	req->data = newSVsv (pathname);
		502	req->dataptr = SvPV_nolen (req->data);
		503	req->callback = SvREFCNT_inc (callback);
		504
		505	send_req (req);
264		506
265	int	507	int
266	poll_fileno()	508	poll_fileno()
267	PROTOTYPE:	509	PROTOTYPE:
268	CODE:	510	CODE:
…		…
276	CODE:	518	CODE:
277	RETVAL = poll_cb (aTHX);	519	RETVAL = poll_cb (aTHX);
278	OUTPUT:	520	OUTPUT:
279	RETVAL	521	RETVAL
280		522
		523	void
		524	poll_wait()
		525	PROTOTYPE:
		526	CODE:
		527	poll_wait ();
		528
281	int	529	int
282	nreqs()	530	nreqs()
283	PROTOTYPE:	531	PROTOTYPE:
284	CODE:	532	CODE:
285	RETVAL = nreqs;	533	RETVAL = nreqs;

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Comparing Linux-AIO/AIO.xs (file contents): Revision 1.7 by root, Wed Aug 15 03:24:08 2001 UTC vs. Revision 1.23 by root, Wed Jun 29 15:28:14 2005 UTC

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Comparing Linux-AIO/AIO.xs (file contents):
Revision 1.7 by root, Wed Aug 15 03:24:08 2001 UTC vs.
Revision 1.23 by root, Wed Jun 29 15:28:14 2005 UTC