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Comparing Linux-AIO/AIO.xs (file contents):
Revision 1.12 by root, Tue Dec 25 02:33:48 2001 UTC vs.
Revision 1.19 by root, Fri May 7 00:57:29 2004 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>
10 13
14typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */
15typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
11typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 16typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
12 17
18#ifndef __NR_pread64
19# define __NR_pread64 __NR_pread
20#endif
21#ifndef __NR_pwrite64
22# define __NR_pwrite64 __NR_pwrite
23#endif
24
13#define STACKSIZE 1024 /* yeah */ 25#define STACKSIZE 1024 /* yeah */
14 26
15enum { REQ_QUIT, REQ_READ, REQ_WRITE, REQ_OPEN, REQ_CLOSE }; 27enum { REQ_QUIT, REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE, REQ_STAT, REQ_LSTAT, REQ_FSTAT};
16 28
17typedef struct { 29typedef struct {
18 char stack[STACKSIZE]; 30 char stack[STACKSIZE];
19} aio_thread; 31} aio_thread;
20 32
21typedef struct { 33typedef struct aio_cb {
34 struct aio_cb *next;
35
22 int type; 36 int type;
23 aio_thread *thread; 37 aio_thread *thread;
24 38
25/* read/write */
26 int fd; 39 int fd;
27 off_t offset; 40 off_t offset;
28 size_t length; 41 size_t length;
29 ssize_t result; 42 ssize_t result;
30 mode_t mode; /* open */ 43 mode_t mode; /* open */
31 int errorno; 44 int errorno;
32 SV *data, *callback; 45 SV *data, *callback;
33 void *dataptr; 46 void *dataptr;
34 STRLEN dataoffset; 47 STRLEN dataoffset;
48
49 struct stat64 *statdata;
35} aio_cb; 50} aio_cb;
36 51
37typedef aio_cb *aio_req; 52typedef aio_cb *aio_req;
38 53
39static int started; 54static int started;
40static int nreqs; 55static int nreqs;
41static int reqpipe[2], respipe[2]; 56static int reqpipe[2], respipe[2];
42 57
58static aio_req qs, qe; /* queue start, queue end */
59
43static int aio_proc(void *arg); 60static int aio_proc(void *arg);
44 61
45static void 62static void
46start_thread(void) 63start_thread (void)
47{ 64{
48 aio_thread *thr; 65 aio_thread *thr;
49 66
50 New (0, thr, 1, aio_thread); 67 New (0, thr, 1, aio_thread);
51 68
… …
57 else 74 else
58 Safefree (thr); 75 Safefree (thr);
59} 76}
60 77
61static void 78static void
79send_reqs (void)
80{
81 /* this write is atomic */
82 while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
83 {
84 qs = qs->next;
85 if (!qs) qe = 0;
86 }
87}
88
89static void
90send_req (aio_req req)
91{
92 nreqs++;
93 req->next = 0;
94
95 if (qe)
96 qe->next = req;
97 else
98 qe = qs = req;
99
100 send_reqs ();
101}
102
103static void
62end_thread(void) 104end_thread (void)
63{ 105{
64 aio_req req; 106 aio_req req;
65 New (0, req, 1, aio_cb); 107 New (0, req, 1, aio_cb);
66 req->type = REQ_QUIT; 108 req->type = REQ_QUIT;
67 write (reqpipe[1], &req, sizeof (aio_req)); 109
110 send_req (req);
68} 111}
69 112
70static void 113static void
71send_req (aio_req req) 114read_write (pTHX_
72{
73 nreqs++;
74 write (reqpipe[1], &req, sizeof (aio_req));
75}
76
77static void
78read_write (pTHX_ int dowrite, int fd, off_t offset, size_t length, 115 int dowrite, int fd, off_t offset, size_t length,
79 SV *data, STRLEN dataoffset, SV*callback) 116 SV *data, STRLEN dataoffset, SV *callback)
80{ 117{
81 aio_req req; 118 aio_req req;
82 STRLEN svlen; 119 STRLEN svlen;
83 char *svptr = SvPV (data, svlen); 120 char *svptr = SvPV (data, svlen);
121
122 SvUPGRADE (data, SVt_PV);
123 SvPOK_on (data);
84 124
85 if (dataoffset < 0) 125 if (dataoffset < 0)
86 dataoffset += svlen; 126 dataoffset += svlen;
87 127
88 if (dataoffset < 0 || dataoffset > svlen) 128 if (dataoffset < 0 || dataoffset > svlen)
… …
101 } 141 }
102 142
103 if (length < 0) 143 if (length < 0)
104 croak ("length must not be negative"); 144 croak ("length must not be negative");
105 145
106 New (0, req, 1, aio_cb); 146 Newz (0, req, 1, aio_cb);
107 147
108 if (!req) 148 if (!req)
109 croak ("out of memory during aio_req allocation"); 149 croak ("out of memory during aio_req allocation");
110 150
111 req->type = dowrite ? REQ_WRITE : REQ_READ; 151 req->type = dowrite ? REQ_WRITE : REQ_READ;
… …
140 180
141 if (req->type == REQ_READ) 181 if (req->type == REQ_READ)
142 SvCUR_set (req->data, req->dataoffset 182 SvCUR_set (req->data, req->dataoffset
143 + req->result > 0 ? req->result : 0); 183 + req->result > 0 ? req->result : 0);
144 184
185 if (req->data)
186 SvREFCNT_dec (req->data);
187
188 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
189 {
190 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
191 PL_laststatval = req->result;
192 PL_statcache.st_dev = req->statdata->st_dev;
193 PL_statcache.st_ino = req->statdata->st_ino;
194 PL_statcache.st_mode = req->statdata->st_mode;
195 PL_statcache.st_nlink = req->statdata->st_nlink;
196 PL_statcache.st_uid = req->statdata->st_uid;
197 PL_statcache.st_gid = req->statdata->st_gid;
198 PL_statcache.st_rdev = req->statdata->st_rdev;
199 PL_statcache.st_size = req->statdata->st_size;
200 PL_statcache.st_atime = req->statdata->st_atime;
201 PL_statcache.st_mtime = req->statdata->st_mtime;
202 PL_statcache.st_ctime = req->statdata->st_ctime;
203 PL_statcache.st_blksize = req->statdata->st_blksize;
204 PL_statcache.st_blocks = req->statdata->st_blocks;
205
206 Safefree (req->statdata);
207 }
208
145 PUSHMARK (SP); 209 PUSHMARK (SP);
146 XPUSHs (sv_2mortal (newSViv (req->result))); 210 XPUSHs (sv_2mortal (newSViv (req->result)));
147 PUTBACK; 211 PUTBACK;
148 call_sv (req->callback, G_VOID); 212 call_sv (req->callback, G_VOID);
149 SPAGAIN; 213 SPAGAIN;
150 214
151 SvREFCNT_dec (req->data); 215 if (req->callback)
152 SvREFCNT_dec (req->callback); 216 SvREFCNT_dec (req->callback);
153 217
154 errno = errorno; 218 errno = errorno;
155 nreqs--; 219 nreqs--;
156 count++; 220 count++;
157 } 221 }
158 222
159 Safefree (req); 223 Safefree (req);
160 } 224 }
161 225
226 if (qs)
227 send_reqs ();
228
162 return count; 229 return count;
163} 230}
164 231
165static sigset_t fullsigset; 232static sigset_t fullsigset;
166 233
167#undef errno 234#undef errno
168#include <asm/unistd.h> 235#include <asm/unistd.h>
169 236
170static int 237static int
171aio_proc(void *thr_arg) 238aio_proc (void *thr_arg)
172{ 239{
173 aio_thread *thr = thr_arg; 240 aio_thread *thr = thr_arg;
174 aio_req req; 241 aio_req req;
175 int errno; 242 int errno;
176 243
244 /* this is very much x86 and kernel-specific :(:(:( */
177 /* we rely on gcc's ability to create closures. */ 245 /* we rely on gcc's ability to create closures. */
178 _syscall3(int,lseek,int,fd,off_t,offset,int,whence)
179 _syscall3(int,read,int,fd,char *,buf,off_t,count) 246 _syscall3(int,read,int,fd,char *,buf,size_t,count)
180 _syscall3(int,write,int,fd,char *,buf,off_t,count) 247 _syscall3(int,write,int,fd,char *,buf,size_t,count)
248
181 _syscall3(int,open,char *,pathname,int,flags,mode_t,mode) 249 _syscall3(int,open,char *,pathname,int,flags,mode_t,mode)
182 _syscall1(int,close,int,fd) 250 _syscall1(int,close,int,fd)
251
252 _syscall5(int,pread64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi)
253 _syscall5(int,pwrite64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi)
254
255 _syscall2(int,stat64, const char *, filename, struct stat64 *, buf)
256 _syscall2(int,lstat64, const char *, filename, struct stat64 *, buf)
257 _syscall2(int,fstat64, int, fd, struct stat64 *, buf)
183 258
184 sigprocmask (SIG_SETMASK, &fullsigset, 0); 259 sigprocmask (SIG_SETMASK, &fullsigset, 0);
185 260
186 /* then loop */ 261 /* then loop */
187 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 262 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
188 { 263 {
189 req->thread = thr; 264 req->thread = thr;
190 errno = 0; 265 errno = 0; /* strictly unnecessary */
191 266
192 if (req->type == REQ_READ || req->type == REQ_WRITE) 267 switch (req->type)
193 { 268 {
194 if (lseek (req->fd, req->offset, SEEK_SET) == req->offset) 269 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break;
195 { 270 case REQ_WRITE: req->result = pwrite64(req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break;
196 if (req->type == REQ_READ)
197 req->result = read (req->fd, req->dataptr, req->length);
198 else
199 req->result = write(req->fd, req->dataptr, req->length);
200 }
201 }
202 else if (req->type == REQ_OPEN)
203 {
204 req->result = open (req->dataptr, req->fd, req->mode); 271 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
205 }
206 else if (req->type == REQ_CLOSE)
207 {
208 req->result = close (req->fd); 272 case REQ_CLOSE: req->result = close (req->fd); break;
209 } 273 case REQ_STAT: req->result = stat64 (req->dataptr, req->statdata); break;
210 else 274 case REQ_LSTAT: req->result = lstat64 (req->dataptr, req->statdata); break;
211 { 275 case REQ_FSTAT: req->result = fstat64 (req->fd, req->statdata); break;
276
277 case REQ_QUIT:
278 default:
212 write (respipe[1], (void *)&req, sizeof (req)); 279 write (respipe[1], (void *)&req, sizeof (req));
213 break; 280 return 0;
214 } 281 }
215 282
216 req->errorno = errno; 283 req->errorno = errno;
217 write (respipe[1], (void *)&req, sizeof (req)); 284 write (respipe[1], (void *)&req, sizeof (req));
218 } 285 }
… …
230 sigdelset (&fullsigset, SIGABRT); 297 sigdelset (&fullsigset, SIGABRT);
231 sigdelset (&fullsigset, SIGINT); 298 sigdelset (&fullsigset, SIGINT);
232 299
233 if (pipe (reqpipe) || pipe (respipe)) 300 if (pipe (reqpipe) || pipe (respipe))
234 croak ("unable to initialize request or result pipe"); 301 croak ("unable to initialize request or result pipe");
302
303 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))
304 croak ("cannot set result pipe to nonblocking mode");
235 305
236 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) 306 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
237 croak ("cannot set result pipe to nonblocking mode"); 307 croak ("cannot set result pipe to nonblocking mode");
238} 308}
239 309
… …
255 { 325 {
256 end_thread (); 326 end_thread ();
257 cur--; 327 cur--;
258 } 328 }
259 329
260 poll_cb ();
261 while (started > nthreads) 330 while (started > nthreads)
262 { 331 {
263 sched_yield (); 332 fd_set rfd;
264 fcntl (respipe[0], F_SETFL, 0); 333 FD_ZERO(&rfd);
334 FD_SET(respipe[0], &rfd);
335
336 select (respipe[0] + 1, &rfd, 0, 0, 0);
265 poll_cb (); 337 poll_cb (aTHX);
266 fcntl (respipe[0], F_SETFL, O_NONBLOCK);
267 } 338 }
268 339
269void 340void
341aio_open(pathname,flags,mode,callback)
342 SV * pathname
343 int flags
344 int mode
345 SV * callback
346 PROTOTYPE: $$$$
347 CODE:
348 aio_req req;
349
350 Newz (0, req, 1, aio_cb);
351
352 if (!req)
353 croak ("out of memory during aio_req allocation");
354
355 req->type = REQ_OPEN;
356 req->data = newSVsv (pathname);
357 req->dataptr = SvPV_nolen (req->data);
358 req->fd = flags;
359 req->mode = mode;
360 req->callback = SvREFCNT_inc (callback);
361
362 send_req (req);
363
364void
365aio_close(fh,callback)
366 InputStream fh
367 SV * callback
368 PROTOTYPE: $$
369 CODE:
370 aio_req req;
371
372 Newz (0, req, 1, aio_cb);
373
374 if (!req)
375 croak ("out of memory during aio_req allocation");
376
377 req->type = REQ_CLOSE;
378 req->fd = PerlIO_fileno (fh);
379 req->callback = SvREFCNT_inc (callback);
380
381 send_req (req);
382
383void
270aio_read(fh,offset,length,data,dataoffset,callback) 384aio_read(fh,offset,length,data,dataoffset,callback)
271 InOutStream fh 385 InputStream fh
272 UV offset 386 UV offset
273 IV length 387 IV length
274 SV * data 388 SV * data
275 IV dataoffset 389 IV dataoffset
276 SV * callback 390 SV * callback
277 PROTOTYPE: $$$$$$ 391 PROTOTYPE: $$$$$$
278 ALIAS: 392 CODE:
279 aio_write = 1
280 CODE:
281 SvUPGRADE (data, SVt_PV);
282 SvPOK_on (data);
283 read_write (aTHX_ ix, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); 393 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
284 394
285void 395void
286aio_open(pathname,flags,mode,callback) 396aio_write(fh,offset,length,data,dataoffset,callback)
287 char * pathname 397 OutputStream fh
288 int flags 398 UV offset
289 int mode 399 IV length
400 SV * data
401 IV dataoffset
290 SV * callback 402 SV * callback
291 PROTOTYPE: $$$$ 403 PROTOTYPE: $$$$$$
404 CODE:
405 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
406
407void
408aio_stat(fh_or_path,callback)
409 SV * fh_or_path
410 SV * callback
411 PROTOTYPE: $$
412 ALIAS:
413 aio_lstat = 1
292 CODE: 414 CODE:
293 aio_req req; 415 aio_req req;
294 416
295 New (0, req, 1, aio_cb); 417 Newz (0, req, 1, aio_cb);
296 418
297 if (!req) 419 if (!req)
298 croak ("out of memory during aio_req allocation"); 420 croak ("out of memory during aio_req allocation");
299 421
300 req->type = REQ_OPEN; 422 New (0, req->statdata, 1, struct stat64);
301 req->dataptr = pathname;
302 req->fd = flags;
303 req->mode = mode;
304 req->callback = SvREFCNT_inc (callback);
305 423
306 send_req (req);
307
308void
309aio_close(fh,callback)
310 InOutStream fh
311 SV * callback
312 PROTOTYPE: $
313 CODE:
314 aio_req req;
315
316 New (0, req, 1, aio_cb);
317
318 if (!req) 424 if (!req->statdata)
319 croak ("out of memory during aio_req allocation"); 425 croak ("out of memory during aio_req->statdata allocation");
320 426
427 if (SvPOK (fh_or_path))
428 {
429 req->type = ix ? REQ_LSTAT : REQ_STAT;
430 req->data = newSVsv (fh_or_path);
431 req->dataptr = SvPV_nolen (req->data);
432 }
433 else
434 {
321 req->type = REQ_CLOSE; 435 req->type = REQ_FSTAT;
322 req->fd = PerlIO_fileno (fh); 436 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
437 }
438
323 req->callback = SvREFCNT_inc (callback); 439 req->callback = SvREFCNT_inc (callback);
324 440
325 send_req (req); 441 send_req (req);
326 442
327int 443int

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