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Comparing Linux-AIO/AIO.xs (file contents):
Revision 1.11 by root, Mon Oct 8 12:58:41 2001 UTC vs.
Revision 1.29 by root, Sat Jul 9 22:45:06 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, REQ_CLOSE }; 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 aio_req req; 277 aio_req req;
173 int errno; 278 int errno;
174 279
280 /* this is very much kernel-specific :(:(:( */
175 /* we rely on gcc's ability to create closures. */ 281 /* we rely on gcc's ability to create closures. */
176 _syscall3(int,lseek,int,fd,off_t,offset,int,whence) 282 _syscall3(__kernel_size_t, read , unsigned int, fd, char *, buf, __kernel_size_t, count)
177 _syscall3(int,read,int,fd,char *,buf,off_t,count) 283 _syscall3(__kernel_size_t, write, unsigned int, fd, char *, buf, __kernel_size_t, count)
178 _syscall3(int,write,int,fd,char *,buf,off_t,count) 284
179 _syscall3(int,open,char *,pathname,int,flags,mode_t,mode) 285 _syscall3(long, open, char *, pathname, int, flags, int, mode)
180 _syscall1(int,close,int,fd) 286 _syscall1(long, close, unsigned int, fd)
287 _syscall1(long, unlink, char *, filename);
288 _syscall1(long, fsync, unsigned int, fd);
289 _syscall1(long, fdatasync, unsigned int, fd);
181 290
291#if BYTE_ORDER == LITTLE_ENDIAN
292# define LOFF_ARG(off) (off & 0xffffffff), (off >> 32)
293#elif BYTE_ORDER == BIG_ENDIAN
294# define LOFF_ARG(off) (off >> 32), (off & 0xffffffff)
295#endif
296
297#ifndef __NR_pread64
298# define __NR_pread64 __NR_pread
299# define __NR_pwrite64 __NR_write
300#endif
301 _syscall5(__kernel_ssize_t, pread64 , unsigned int, fd, char *, buf,
302 __kernel_size_t, count, unsigned int, offset_lh, unsigned int, offset_hl)
303 _syscall5(__kernel_ssize_t, pwrite64, unsigned int, fd, char *, buf,
304 __kernel_size_t, count, unsigned int, offset_lh, unsigned int, offset_hl)
305 _syscall4(long, readahead, unsigned int, fd, unsigned int, offset_lh, unsigned int, offset_hl, __kernel_size_t, count);
306
307#if __NR_stat64
308 _syscall2(long, stat64 , const char *, filename, struct kernelstat64 *, buf)
309 _syscall2(long, lstat64, const char *, filename, struct kernelstat64 *, buf)
310 _syscall2(long, fstat64, int , fd , struct kernelstat64 *, buf)
311#elif __NR_stat
312 _syscall2(long, stat , const char *, filename, struct kernelstat *, buf)
313 _syscall2(long, lstat, const char *, filename, struct kernelstat *, buf)
314 _syscall2(long, fstat, int , fd , struct kernelstat *, buf)
315#else
316# error "neither stat64 nor stat defined"
317#endif
318
319 /* the following two calls might clobber errno */
182 sigprocmask (SIG_SETMASK, &fullsigset, 0); 320 sigprocmask (SIG_SETMASK, &fullsigset, 0);
321 prctl (PR_SET_PDEATHSIG, SIGKILL);
183 322
184 /* then loop */ 323 /* then loop */
185 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 324 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
186 { 325 {
187 req->thread = thr; 326 req->thread = thr;
188 errno = 0; 327 errno = 0; /* strictly unnecessary */
189 328
190 if (req->type == REQ_READ || req->type == REQ_WRITE) 329 switch (req->type)
191 { 330 {
192 if (lseek (req->fd, req->offset, SEEK_SET) == req->offset) 331 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, LOFF_ARG (req->offset)); break;
193 { 332 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, LOFF_ARG (req->offset)); break;
194 if (req->type == REQ_READ) 333 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); 334
196 else 335#if __NR_stat64
197 req->result = write(req->fd, req->dataptr, req->length); 336 struct kernelstat64 statdata;
198 } 337 case REQ_STAT: req->result = stat64 (req->dataptr, &statdata); COPY_STATDATA; break;
199 } 338 case REQ_LSTAT: req->result = lstat64 (req->dataptr, &statdata); COPY_STATDATA; break;
200 else if (req->type == REQ_OPEN) 339 case REQ_FSTAT: req->result = fstat64 (req->fd , &statdata); COPY_STATDATA; break;
201 { 340#else
341 struct kernelstat statdata;
342 case REQ_STAT: req->result = stat (req->dataptr, &statdata); COPY_STATDATA; break;
343 case REQ_LSTAT: req->result = lstat (req->dataptr, &statdata); COPY_STATDATA; break;
344 case REQ_FSTAT: req->result = fstat (req->fd , &statdata); COPY_STATDATA; break;
345#endif
346
202 req->result = open (req->dataptr, req->fd, req->mode); 347 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
203 } 348 case REQ_CLOSE: req->result = close (req->fd); break;
204 else if (req->type == REQ_CLOSE) 349 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
205 { 350
206 req->result = close (req->fd); 351 case REQ_FSYNC: req->result = fsync (req->fd); break;
207 } 352 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
208 else 353
209 { 354 case REQ_QUIT:
210 write (respipe[1], (void *)&req, sizeof (req)); 355 write (respipe[1], (void *)&req, sizeof (req));
356 return 0;
357
358 default:
359 req->result = ENOSYS;
211 break; 360 break;
212 } 361 }
213 362
214 req->errorno = errno; 363 req->errorno = errno;
215 write (respipe[1], (void *)&req, sizeof (req)); 364 write (respipe[1], (void *)&req, sizeof (req));
216 } 365 }
… …
228 sigdelset (&fullsigset, SIGABRT); 377 sigdelset (&fullsigset, SIGABRT);
229 sigdelset (&fullsigset, SIGINT); 378 sigdelset (&fullsigset, SIGINT);
230 379
231 if (pipe (reqpipe) || pipe (respipe)) 380 if (pipe (reqpipe) || pipe (respipe))
232 croak ("unable to initialize request or result pipe"); 381 croak ("unable to initialize request or result pipe");
382
383 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))
384 croak ("cannot set result pipe to nonblocking mode");
233 385
234 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) 386 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
235 croak ("cannot set result pipe to nonblocking mode"); 387 croak ("cannot set result pipe to nonblocking mode");
236} 388}
237 389
… …
253 { 405 {
254 end_thread (); 406 end_thread ();
255 cur--; 407 cur--;
256 } 408 }
257 409
258 poll_cb ();
259 while (started > nthreads) 410 while (started > nthreads)
260 { 411 {
261 sched_yield (); 412 poll_wait ();
262 poll_cb (); 413 poll_cb (aTHX);
263 } 414 }
264 415
265void 416void
266aio_read(fh,offset,length,data,dataoffset,callback)
267 PerlIO * fh
268 UV offset
269 STRLEN length
270 SV * data
271 STRLEN dataoffset
272 SV * callback
273 PROTOTYPE: $$$$$$
274 ALIAS:
275 aio_write = 1
276 CODE:
277 SvUPGRADE (data, SVt_PV);
278 SvPOK_on (data);
279 read_write (aTHX_ ix, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
280
281void
282aio_open(pathname,flags,mode,callback) 417aio_open(pathname,flags,mode,callback)
283 char * pathname 418 SV * pathname
284 int flags 419 int flags
285 int mode 420 int mode
286 SV * callback 421 SV * callback
287 PROTOTYPE: $$$$ 422 PROTOTYPE: $$$$
288 CODE: 423 CODE:
289 aio_req req; 424 aio_req req;
290 425
291 New (0, req, 1, aio_cb); 426 Newz (0, req, 1, aio_cb);
292 427
293 if (!req) 428 if (!req)
294 croak ("out of memory during aio_req allocation"); 429 croak ("out of memory during aio_req allocation");
295 430
296 req->type = REQ_OPEN; 431 req->type = REQ_OPEN;
297 req->dataptr = pathname; 432 req->data = newSVsv (pathname);
433 req->dataptr = SvPV_nolen (req->data);
298 req->fd = flags; 434 req->fd = flags;
299 req->mode = mode; 435 req->mode = mode;
300 req->callback = SvREFCNT_inc (callback); 436 req->callback = SvREFCNT_inc (callback);
301 437
302 send_req (req); 438 send_req (req);
303 439
304void 440void
305aio_close(fh,callback) 441aio_close(fh,callback)
306 PerlIO * fh 442 InputStream fh
307 SV * callback 443 SV * callback
308 PROTOTYPE: $ 444 PROTOTYPE: $$
445 ALIAS:
446 aio_close = REQ_CLOSE
447 aio_fsync = REQ_FSYNC
448 aio_fdatasync = REQ_FDATASYNC
309 CODE: 449 CODE:
310 aio_req req; 450 aio_req req;
311 451
312 New (0, req, 1, aio_cb); 452 Newz (0, req, 1, aio_cb);
313 453
314 if (!req) 454 if (!req)
315 croak ("out of memory during aio_req allocation"); 455 croak ("out of memory during aio_req allocation");
316 456
317 req->type = REQ_CLOSE; 457 req->type = ix;
318 req->fd = PerlIO_fileno (fh); 458 req->fd = PerlIO_fileno (fh);
319 req->callback = SvREFCNT_inc (callback); 459 req->callback = SvREFCNT_inc (callback);
320 460
321 send_req (req); 461 send_req (req);
462
463void
464aio_read(fh,offset,length,data,dataoffset,callback)
465 InputStream fh
466 UV offset
467 IV length
468 SV * data
469 IV dataoffset
470 SV * callback
471 PROTOTYPE: $$$$$$
472 CODE:
473 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
474
475void
476aio_write(fh,offset,length,data,dataoffset,callback)
477 OutputStream fh
478 UV offset
479 IV length
480 SV * data
481 IV dataoffset
482 SV * callback
483 PROTOTYPE: $$$$$$
484 CODE:
485 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
486
487void
488aio_stat(fh_or_path,callback)
489 SV * fh_or_path
490 SV * callback
491 PROTOTYPE: $$
492 ALIAS:
493 aio_lstat = 1
494 CODE:
495 aio_req req;
496
497 Newz (0, req, 1, aio_cb);
498
499 if (!req)
500 croak ("out of memory during aio_req allocation");
501
502 New (0, req->statdata, 1, Stat_t);
503
504 if (!req->statdata)
505 croak ("out of memory during aio_req->statdata allocation");
506
507 if (SvPOK (fh_or_path))
508 {
509 req->type = ix ? REQ_LSTAT : REQ_STAT;
510 req->data = newSVsv (fh_or_path);
511 req->dataptr = SvPV_nolen (req->data);
512 }
513 else
514 {
515 req->type = REQ_FSTAT;
516 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
517 }
518
519 req->callback = SvREFCNT_inc (callback);
520
521 send_req (req);
522
523void
524aio_unlink(pathname,callback)
525 SV * pathname
526 SV * callback
527 PROTOTYPE: $$
528 CODE:
529 aio_req req;
530
531 Newz (0, req, 1, aio_cb);
532
533 if (!req)
534 croak ("out of memory during aio_req allocation");
535
536 req->type = REQ_UNLINK;
537 req->data = newSVsv (pathname);
538 req->dataptr = SvPV_nolen (req->data);
539 req->callback = SvREFCNT_inc (callback);
540
541 send_req (req);
322 542
323int 543int
324poll_fileno() 544poll_fileno()
325 PROTOTYPE: 545 PROTOTYPE:
326 CODE: 546 CODE:
… …
334 CODE: 554 CODE:
335 RETVAL = poll_cb (aTHX); 555 RETVAL = poll_cb (aTHX);
336 OUTPUT: 556 OUTPUT:
337 RETVAL 557 RETVAL
338 558
559void
560poll_wait()
561 PROTOTYPE:
562 CODE:
563 poll_wait ();
564
339int 565int
340nreqs() 566nreqs()
341 PROTOTYPE: 567 PROTOTYPE:
342 CODE: 568 CODE:
343 RETVAL = nreqs; 569 RETVAL = nreqs;

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