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Comparing Linux-AIO/AIO.xs (file contents):
Revision 1.8 by root, Thu Aug 16 02:43:46 2001 UTC vs.
Revision 1.31 by root, Sun Jul 10 01:02:51 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>
8#include <signal.h> 11#include <signal.h>
9#include <sched.h> 12#include <sched.h>
13#include <endian.h>
10 14
11#define STACKSIZE 1024 /* yeah */ 15typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */
16typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
17typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
12 18
13enum { REQ_QUIT, REQ_READ, REQ_WRITE, REQ_OPEN }; 19#if __i386 || __amd64
20# define STACKSIZE ( 256 * sizeof (long))
21#elif __ia64
22# define STACKSIZE (8192 * sizeof (long))
23#else
24# define STACKSIZE ( 512 * sizeof (long))
25#endif
26
27enum {
28 REQ_QUIT,
29 REQ_OPEN, REQ_CLOSE,
30 REQ_READ, REQ_WRITE, REQ_READAHEAD,
31 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
32 REQ_FSYNC, REQ_FDATASYNC,
33};
14 34
15typedef struct { 35typedef struct {
16 char stack[STACKSIZE]; 36 char stack[STACKSIZE];
17} aio_thread; 37} aio_thread;
18 38
19typedef struct { 39typedef struct aio_cb {
40 struct aio_cb *next;
41
20 int type; 42 int type;
21 aio_thread *thread; 43 aio_thread *thread;
22 44
23/* read/write */
24 int fd; 45 int fd;
25 off_t offset; 46 off_t offset;
26 size_t length; 47 size_t length;
27 ssize_t result; 48 ssize_t result;
28 mode_t mode; /* open */ 49 mode_t mode; /* open */
29 int errorno; 50 int errorno;
30 SV *data, *callback; 51 SV *data, *callback;
31 void *dataptr; 52 void *dataptr;
32 STRLEN dataoffset; 53 STRLEN dataoffset;
54
55 Stat_t *statdata;
33} aio_cb; 56} aio_cb;
34 57
35typedef aio_cb *aio_req; 58typedef aio_cb *aio_req;
36 59
37static int started; 60static int started;
38static int nreqs; 61static int nreqs;
39static int reqpipe[2], respipe[2]; 62static int reqpipe[2], respipe[2];
40 63
64static aio_req qs, qe; /* queue start, queue end */
65
41static int aio_proc(void *arg); 66static int aio_proc(void *arg);
42 67
43static void 68static void
44start_thread(void) 69start_thread (void)
45{ 70{
46 aio_thread *thr; 71 aio_thread *thr;
47 72
48 New (0, thr, 1, aio_thread); 73 New (0, thr, 1, aio_thread);
49 74
50 if (clone (aio_proc, 75 if (clone (aio_proc,
51 &(thr->stack[STACKSIZE]), 76 &(thr->stack[STACKSIZE - 16]),
52 CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND, 77 CLONE_VM|CLONE_FS|CLONE_FILES,
53 thr) >= 0) 78 thr) >= 0)
54 started++; 79 started++;
55 else 80 else
56 Safefree (thr); 81 Safefree (thr);
57} 82}
58 83
59static void 84static void
85send_reqs (void)
86{
87 /* this write is atomic */
88 while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
89 {
90 qs = qs->next;
91 if (!qs) qe = 0;
92 }
93}
94
95static void
96send_req (aio_req req)
97{
98 nreqs++;
99 req->next = 0;
100
101 if (qe)
102 {
103 qe->next = req;
104 qe = req;
105 }
106 else
107 qe = qs = req;
108
109 send_reqs ();
110}
111
112static void
60end_thread(void) 113end_thread (void)
61{ 114{
62 aio_req req; 115 aio_req req;
63 New (0, req, 1, aio_cb); 116 New (0, req, 1, aio_cb);
64 req->type = REQ_QUIT; 117 req->type = REQ_QUIT;
65 write (reqpipe[1], &req, sizeof (aio_req)); 118
119 send_req (req);
66} 120}
67 121
68static void 122static void
69send_req (aio_req req) 123read_write (pTHX_
70{
71 nreqs++;
72 write (reqpipe[1], &req, sizeof (aio_req));
73}
74
75static void
76read_write (pTHX_ int dowrite, int fd, off_t offset, size_t length, 124 int dowrite, int fd, off_t offset, size_t length,
77 SV *data, STRLEN dataoffset, SV*callback) 125 SV *data, STRLEN dataoffset, SV *callback)
78{ 126{
79 aio_req req; 127 aio_req req;
80 STRLEN svlen; 128 STRLEN svlen;
81 char *svptr = SvPV (data, svlen); 129 char *svptr = SvPV (data, svlen);
130
131 SvUPGRADE (data, SVt_PV);
132 SvPOK_on (data);
82 133
83 if (dataoffset < 0) 134 if (dataoffset < 0)
84 dataoffset += svlen; 135 dataoffset += svlen;
85 136
86 if (dataoffset < 0 || dataoffset > svlen) 137 if (dataoffset < 0 || dataoffset > svlen)
… …
99 } 150 }
100 151
101 if (length < 0) 152 if (length < 0)
102 croak ("length must not be negative"); 153 croak ("length must not be negative");
103 154
104 New (0, req, 1, aio_cb); 155 Newz (0, req, 1, aio_cb);
105 156
106 if (!req) 157 if (!req)
107 croak ("out of memory during aio_req allocation"); 158 croak ("out of memory during aio_req allocation");
108 159
109 req->type = dowrite ? REQ_WRITE : REQ_READ; 160 req->type = dowrite ? REQ_WRITE : REQ_READ;
… …
115 req->callback = SvREFCNT_inc (callback); 166 req->callback = SvREFCNT_inc (callback);
116 167
117 send_req (req); 168 send_req (req);
118} 169}
119 170
171static void
172poll_wait ()
173{
174 fd_set rfd;
175 FD_ZERO(&rfd);
176 FD_SET(respipe[0], &rfd);
177
178 select (respipe[0] + 1, &rfd, 0, 0, 0);
179}
180
120static int 181static int
121poll_cb (pTHX) 182poll_cb (pTHX)
122{ 183{
123 dSP; 184 dSP;
124 int count = 0; 185 int count = 0;
125 aio_req req; 186 aio_req req;
126 187
127 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 188 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))
128 { 189 {
190 nreqs--;
191
129 if (req->type == REQ_QUIT) 192 if (req->type == REQ_QUIT)
130 { 193 {
131 Safefree (req->thread); 194 Safefree (req->thread);
132 started--; 195 started--;
133 } 196 }
… …
138 201
139 if (req->type == REQ_READ) 202 if (req->type == REQ_READ)
140 SvCUR_set (req->data, req->dataoffset 203 SvCUR_set (req->data, req->dataoffset
141 + req->result > 0 ? req->result : 0); 204 + req->result > 0 ? req->result : 0);
142 205
206 if (req->data)
207 SvREFCNT_dec (req->data);
208
209 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
210 {
211 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
212 PL_laststatval = req->result;
213 PL_statcache = *(req->statdata);
214
215 Safefree (req->statdata);
216 }
217
143 PUSHMARK (SP); 218 PUSHMARK (SP);
144 XPUSHs (sv_2mortal (newSViv (req->result))); 219 XPUSHs (sv_2mortal (newSViv (req->result)));
145 PUTBACK; 220 PUTBACK;
146 call_sv (req->callback, G_VOID); 221 call_sv (req->callback, G_VOID);
147 SPAGAIN; 222 SPAGAIN;
148 223
149 SvREFCNT_dec (req->data); 224 if (req->callback)
150 SvREFCNT_dec (req->callback); 225 SvREFCNT_dec (req->callback);
151 226
152 errno = errorno; 227 errno = errorno;
153 nreqs--;
154 count++; 228 count++;
155 } 229 }
156 230
157 Safefree (req); 231 Safefree (req);
158 } 232 }
159 233
234 if (qs)
235 send_reqs ();
236
160 return count; 237 return count;
161} 238}
162 239
163static sigset_t fullsigset; 240static sigset_t fullsigset;
164 241
165#undef errno 242#undef errno
166#include <asm/unistd.h> 243#include <asm/unistd.h>
244#include <linux/types.h>
245#include <sys/prctl.h>
246
247#if __alpha || __ia64 || __hppa || __v850__
248# define stat kernelstat
249# define stat64 kernelstat64
250# include <asm/stat.h>
251# undef stat
252# undef stat64
253#else
254# define kernelstat stat
255# define kernelstat64 stat64
256#endif
257
258#define COPY_STATDATA \
259 req->statdata->st_dev = statdata.st_dev; \
260 req->statdata->st_ino = statdata.st_ino; \
261 req->statdata->st_mode = statdata.st_mode; \
262 req->statdata->st_nlink = statdata.st_nlink; \
263 req->statdata->st_uid = statdata.st_uid; \
264 req->statdata->st_gid = statdata.st_gid; \
265 req->statdata->st_rdev = statdata.st_rdev; \
266 req->statdata->st_size = statdata.st_size; \
267 req->statdata->st_atime = statdata.st_atime; \
268 req->statdata->st_mtime = statdata.st_mtime; \
269 req->statdata->st_ctime = statdata.st_ctime; \
270 req->statdata->st_blksize = statdata.st_blksize; \
271 req->statdata->st_blocks = statdata.st_blocks; \
167 272
168static int 273static int
169aio_proc(void *thr_arg) 274aio_proc (void *thr_arg)
170{ 275{
171 aio_thread *thr = thr_arg; 276 aio_thread *thr = thr_arg;
172 int sig; 277 aio_req req;
173 int errno; 278 int errno;
174 aio_req req;
175 279
280 /* this is very much kernel-specific :(:(:( */
281 /* we rely on gcc's ability to create closures. */
282 _syscall3(__kernel_size_t, read , unsigned int, fd, char *, buf, __kernel_size_t, count)
283 _syscall3(__kernel_size_t, write, unsigned int, fd, char *, buf, __kernel_size_t, count)
284
285 _syscall3(long, open, char *, pathname, int, flags, int, mode)
286 _syscall1(long, close, unsigned int, fd)
287 _syscall1(long, unlink, char *, filename);
288 _syscall1(long, fsync, unsigned int, fd);
289
290#ifndef __NR_fdatasync
291# define __NR_fdatasync __NR_fsync
292#endif
293 _syscall1(long, fdatasync, unsigned int, fd);
294
295#if BYTE_ORDER == LITTLE_ENDIAN
296# define LOFF_ARG(off) (off & 0xffffffff), (off >> 32)
297#elif BYTE_ORDER == BIG_ENDIAN
298# define LOFF_ARG(off) (off >> 32), (off & 0xffffffff)
299#endif
300
301#ifndef __NR_pread64
302# define __NR_pread64 __NR_pread
303# define __NR_pwrite64 __NR_write
304#endif
305 _syscall5(__kernel_ssize_t, pread64 , unsigned int, fd, char *, buf,
306 __kernel_size_t, count, unsigned int, offset_lh, unsigned int, offset_hl)
307 _syscall5(__kernel_ssize_t, pwrite64, unsigned int, fd, char *, buf,
308 __kernel_size_t, count, unsigned int, offset_lh, unsigned int, offset_hl)
309 _syscall4(long, readahead, unsigned int, fd, unsigned int, offset_lh, unsigned int, offset_hl, __kernel_size_t, count);
310
311#if __NR_stat64
312 _syscall2(long, stat64 , const char *, filename, struct kernelstat64 *, buf)
313 _syscall2(long, lstat64, const char *, filename, struct kernelstat64 *, buf)
314 _syscall2(long, fstat64, int , fd , struct kernelstat64 *, buf)
315#elif __NR_stat
316 _syscall2(long, stat , const char *, filename, struct kernelstat *, buf)
317 _syscall2(long, lstat, const char *, filename, struct kernelstat *, buf)
318 _syscall2(long, fstat, int , fd , struct kernelstat *, buf)
319#else
320# error "neither stat64 nor stat defined"
321#endif
322
323 /* the following two calls might clobber errno */
176 sigprocmask (SIG_SETMASK, &fullsigset, 0); 324 sigprocmask (SIG_SETMASK, &fullsigset, 0);
177 325 prctl (PR_SET_PDEATHSIG, SIGKILL);
178 /* we rely on gcc's ability to create closures. */
179 _syscall3(int,lseek,int,fd,off_t,offset,int,whence);
180 _syscall3(int,read,int,fd,char *,buf,off_t,count);
181 _syscall3(int,write,int,fd,char *,buf,off_t,count);
182 _syscall3(int,open,char *,pathname,int,flags,mode_t,mode);
183 326
184 /* then loop */ 327 /* then loop */
185 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 328 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
186 { 329 {
187 req->thread = thr; 330 req->thread = thr;
188 errno = 0; 331 errno = 0; /* strictly unnecessary */
189 332
190 if (req->type == REQ_READ || req->type == REQ_WRITE) 333 switch (req->type)
191 { 334 {
192 if (lseek (req->fd, req->offset, SEEK_SET) == req->offset) 335 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, LOFF_ARG (req->offset)); break;
193 { 336 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, LOFF_ARG (req->offset)); break;
194 if (req->type == REQ_READ) 337 case REQ_READAHEAD: req->result = readahead (req->fd, LOFF_ARG (req->offset), req->length); break;
195 req->result = read (req->fd, req->dataptr, req->length); 338
196 else 339#if __NR_stat64
197 req->result = write(req->fd, req->dataptr, req->length); 340 struct kernelstat64 statdata;
198 } 341 case REQ_STAT: req->result = stat64 (req->dataptr, &statdata); COPY_STATDATA; break;
199 } 342 case REQ_LSTAT: req->result = lstat64 (req->dataptr, &statdata); COPY_STATDATA; break;
200 else if (req->type == REQ_OPEN) 343 case REQ_FSTAT: req->result = fstat64 (req->fd , &statdata); COPY_STATDATA; break;
201 { 344#else
345 struct kernelstat statdata;
346 case REQ_STAT: req->result = stat (req->dataptr, &statdata); COPY_STATDATA; break;
347 case REQ_LSTAT: req->result = lstat (req->dataptr, &statdata); COPY_STATDATA; break;
348 case REQ_FSTAT: req->result = fstat (req->fd , &statdata); COPY_STATDATA; break;
349#endif
350
202 req->result = open (req->dataptr, req->fd, req->mode); 351 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
203 } 352 case REQ_CLOSE: req->result = close (req->fd); break;
204 else 353 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
205 { 354
355 case REQ_FSYNC: req->result = fsync (req->fd); break;
356 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
357
358 case REQ_QUIT:
206 write (respipe[1], (void *)&req, sizeof (req)); 359 write (respipe[1], (void *)&req, sizeof (req));
360 return 0;
361
362 default:
363 req->result = ENOSYS;
207 break; 364 break;
208 } 365 }
209 366
210 req->errorno = errno; 367 req->errorno = errno;
211 write (respipe[1], (void *)&req, sizeof (req)); 368 write (respipe[1], (void *)&req, sizeof (req));
212 } 369 }
… …
217MODULE = Linux::AIO PACKAGE = Linux::AIO 374MODULE = Linux::AIO PACKAGE = Linux::AIO
218 375
219BOOT: 376BOOT:
220{ 377{
221 sigfillset (&fullsigset); 378 sigfillset (&fullsigset);
379 sigdelset (&fullsigset, SIGTERM);
380 sigdelset (&fullsigset, SIGQUIT);
381 sigdelset (&fullsigset, SIGABRT);
382 sigdelset (&fullsigset, SIGINT);
222 383
223 if (pipe (reqpipe) || pipe (respipe)) 384 if (pipe (reqpipe) || pipe (respipe))
224 croak ("unable to initialize request or result pipe"); 385 croak ("unable to initialize request or result pipe");
386
387 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))
388 croak ("cannot set result pipe to nonblocking mode");
225 389
226 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) 390 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
227 croak ("cannot set result pipe to nonblocking mode"); 391 croak ("cannot set result pipe to nonblocking mode");
228} 392}
229 393
… …
238void 402void
239max_parallel(nthreads) 403max_parallel(nthreads)
240 int nthreads 404 int nthreads
241 PROTOTYPE: $ 405 PROTOTYPE: $
242 CODE: 406 CODE:
407{
243 int cur = started; 408 int cur = started;
244 while (cur > nthreads) 409 while (cur > nthreads)
245 { 410 {
246 end_thread (); 411 end_thread ();
247 cur--; 412 cur--;
248 } 413 }
249 414
250 poll_cb ();
251 while (started > nthreads) 415 while (started > nthreads)
252 { 416 {
253 sched_yield (); 417 poll_wait ();
254 poll_cb (); 418 poll_cb (aTHX);
255 } 419 }
256 420}
257void
258aio_read(fh,offset,length,data,dataoffset,callback)
259 PerlIO * fh
260 UV offset
261 STRLEN length
262 SV * data
263 STRLEN dataoffset
264 SV * callback
265 PROTOTYPE: $$$$$$
266 ALIAS:
267 aio_write = 1
268 CODE:
269 SvUPGRADE (data, SVt_PV);
270 SvPOK_on (data);
271 read_write (aTHX_ ix, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
272 421
273void 422void
274aio_open(pathname,flags,mode,callback) 423aio_open(pathname,flags,mode,callback)
275 char * pathname 424 SV * pathname
276 int flags 425 int flags
277 int mode 426 int mode
278 SV * callback 427 SV * callback
279 PROTOTYPE: $$$$ 428 PROTOTYPE: $$$$
280 CODE: 429 CODE:
430{
281 aio_req req; 431 aio_req req;
282 432
283 New (0, req, 1, aio_cb); 433 Newz (0, req, 1, aio_cb);
284 434
285 if (!req) 435 if (!req)
286 croak ("out of memory during aio_req allocation"); 436 croak ("out of memory during aio_req allocation");
287 437
288 req->type = REQ_OPEN; 438 req->type = REQ_OPEN;
289 req->dataptr = pathname; 439 req->data = newSVsv (pathname);
440 req->dataptr = SvPV_nolen (req->data);
290 req->fd = flags; 441 req->fd = flags;
291 req->mode = mode; 442 req->mode = mode;
292 req->callback = SvREFCNT_inc (callback); 443 req->callback = SvREFCNT_inc (callback);
293 444
294 send_req (req); 445 send_req (req);
446}
447
448void
449aio_close(fh,callback)
450 InputStream fh
451 SV * callback
452 PROTOTYPE: $$
453 ALIAS:
454 aio_close = REQ_CLOSE
455 aio_fsync = REQ_FSYNC
456 aio_fdatasync = REQ_FDATASYNC
457 CODE:
458{
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 req->type = ix;
467 req->fd = PerlIO_fileno (fh);
468 req->callback = SvREFCNT_inc (callback);
469
470 send_req (req);
471}
472
473void
474aio_read(fh,offset,length,data,dataoffset,callback)
475 InputStream fh
476 UV offset
477 IV length
478 SV * data
479 IV dataoffset
480 SV * callback
481 PROTOTYPE: $$$$$$
482 CODE:
483 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
484
485void
486aio_write(fh,offset,length,data,dataoffset,callback)
487 OutputStream fh
488 UV offset
489 IV length
490 SV * data
491 IV dataoffset
492 SV * callback
493 PROTOTYPE: $$$$$$
494 CODE:
495 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
496
497void
498aio_readahead(fh,offset,length,callback)
499 InputStream fh
500 UV offset
501 IV length
502 SV * callback
503 PROTOTYPE: $$$$
504 CODE:
505{
506 aio_req req;
507
508 if (length < 0)
509 croak ("length must not be negative");
510
511 Newz (0, req, 1, aio_cb);
512
513 if (!req)
514 croak ("out of memory during aio_req allocation");
515
516 req->type = REQ_READAHEAD;
517 req->fd = PerlIO_fileno (fh);
518 req->offset = offset;
519 req->length = length;
520 req->callback = SvREFCNT_inc (callback);
521
522 send_req (req);
523}
524
525void
526aio_stat(fh_or_path,callback)
527 SV * fh_or_path
528 SV * callback
529 PROTOTYPE: $$
530 ALIAS:
531 aio_lstat = 1
532 CODE:
533{
534 aio_req req;
535
536 Newz (0, req, 1, aio_cb);
537
538 if (!req)
539 croak ("out of memory during aio_req allocation");
540
541 New (0, req->statdata, 1, Stat_t);
542
543 if (!req->statdata)
544 croak ("out of memory during aio_req->statdata allocation");
545
546 if (SvPOK (fh_or_path))
547 {
548 req->type = ix ? REQ_LSTAT : REQ_STAT;
549 req->data = newSVsv (fh_or_path);
550 req->dataptr = SvPV_nolen (req->data);
551 }
552 else
553 {
554 req->type = REQ_FSTAT;
555 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
556 }
557
558 req->callback = SvREFCNT_inc (callback);
559
560 send_req (req);
561}
562
563void
564aio_unlink(pathname,callback)
565 SV * pathname
566 SV * callback
567 PROTOTYPE: $$
568 CODE:
569{
570 aio_req req;
571
572 Newz (0, req, 1, aio_cb);
573
574 if (!req)
575 croak ("out of memory during aio_req allocation");
576
577 req->type = REQ_UNLINK;
578 req->data = newSVsv (pathname);
579 req->dataptr = SvPV_nolen (req->data);
580 req->callback = SvREFCNT_inc (callback);
581
582 send_req (req);
583}
295 584
296int 585int
297poll_fileno() 586poll_fileno()
298 PROTOTYPE: 587 PROTOTYPE:
299 CODE: 588 CODE:
… …
307 CODE: 596 CODE:
308 RETVAL = poll_cb (aTHX); 597 RETVAL = poll_cb (aTHX);
309 OUTPUT: 598 OUTPUT:
310 RETVAL 599 RETVAL
311 600
601void
602poll_wait()
603 PROTOTYPE:
604 CODE:
605 poll_wait ();
606
312int 607int
313nreqs() 608nreqs()
314 PROTOTYPE: 609 PROTOTYPE:
315 CODE: 610 CODE:
316 RETVAL = nreqs; 611 RETVAL = nreqs;

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