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Comparing Linux-AIO/AIO.xs (file contents):
Revision 1.6 by root, Tue Aug 14 23:25:39 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>
11#include <signal.h>
8#include <sched.h> 12#include <sched.h>
9 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 ;) */
16typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
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
10#define STACKSIZE 2048 /* yeah */ 25#define STACKSIZE 1024 /* yeah */
11 26
12#define REQ_QUIT 0 27enum { REQ_QUIT, REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE, REQ_STAT, REQ_LSTAT, REQ_FSTAT};
13#define REQ_READ 1
14#define REQ_WRITE 2
15 28
16typedef struct { 29typedef struct {
17 char stack[STACKSIZE]; 30 char stack[STACKSIZE];
18} aio_thread; 31} aio_thread;
19 32
20typedef struct { 33typedef struct aio_cb {
34 struct aio_cb *next;
35
21 int type; 36 int type;
22 aio_thread *thread; 37 aio_thread *thread;
23 38
24/* read/write */
25 int fd; 39 int fd;
26 off_t offset; 40 off_t offset;
27 size_t length; 41 size_t length;
28 ssize_t result; 42 ssize_t result;
43 mode_t mode; /* open */
29 int errorno; 44 int errorno;
30
31 SV *data, *callback; 45 SV *data, *callback;
32 void *dataptr; 46 void *dataptr;
33 STRLEN dataoffset; 47 STRLEN dataoffset;
48
49 struct stat64 *statdata;
34} aio_cb; 50} aio_cb;
35 51
36typedef aio_cb *aio_req; 52typedef aio_cb *aio_req;
37 53
38static int started; 54static int started;
39static int nreqs; 55static int nreqs;
40static int reqpipe[2], respipe[2]; 56static int reqpipe[2], respipe[2];
41 57
58static aio_req qs, qe; /* queue start, queue end */
59
42static int aio_proc(void *arg); 60static int aio_proc(void *arg);
43 61
44static void 62static void
45start_thread(void) 63start_thread (void)
46{ 64{
47 aio_thread *thr; 65 aio_thread *thr;
48 66
49 New (0, thr, 1, aio_thread); 67 New (0, thr, 1, aio_thread);
50 68
… …
56 else 74 else
57 Safefree (thr); 75 Safefree (thr);
58} 76}
59 77
60static 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
61end_thread(void) 104end_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
69static void 113static void
114read_write (pTHX_
70read_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, SV*callback) 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));
113} 160}
114 161
115static int 162static int
116poll_cb (pTHX) 163poll_cb (pTHX)
117{ 164{
… …
133 180
134 if (req->type == REQ_READ) 181 if (req->type == REQ_READ)
135 SvCUR_set (req->data, req->dataoffset 182 SvCUR_set (req->data, req->dataoffset
136 + req->result > 0 ? req->result : 0); 183 + req->result > 0 ? req->result : 0);
137 184
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
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--; 219 nreqs--;
149 count++; 220 count++;
150 } 221 }
151 222
152 Safefree (req); 223 Safefree (req);
153 } 224 }
154 225
226 if (qs)
227 send_reqs ();
228
155 return count; 229 return count;
156} 230}
231
232static sigset_t fullsigset;
157 233
158#undef errno 234#undef errno
159#include <asm/unistd.h> 235#include <asm/unistd.h>
160 236
161static int 237static int
162aio_proc(void *thr_arg) 238aio_proc (void *thr_arg)
163{ 239{
164 aio_thread *thr = thr_arg; 240 aio_thread *thr = thr_arg;
165 int sig; 241 aio_req req;
166 int errno; 242 int errno;
167 aio_req req;
168 243
244 /* this is very much x86 and kernel-specific :(:(:( */
169 /* we rely on gcc's ability to create closures. */ 245 /* 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); 246 _syscall3(int,read,int,fd,char *,buf,size_t,count)
172 _syscall3(int,write,int,fd,char *,buf,off_t,count); 247 _syscall3(int,write,int,fd,char *,buf,size_t,count)
173 248
174 /* first get rid of any signals */ 249 _syscall3(int,open,char *,pathname,int,flags,mode_t,mode)
175 for (sig = 1; sig < _NSIG; sig++) 250 _syscall1(int,close,int,fd)
176 signal (sig, SIG_DFL);
177 251
178 signal (SIGPIPE, SIG_IGN); 252 _syscall5(int,pread64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi)
179 253 _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)
258
259 sigprocmask (SIG_SETMASK, &fullsigset, 0);
260
180 /* then loop */ 261 /* then loop */
181 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 262 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
182 { 263 {
183 req->thread = thr; 264 req->thread = thr;
265 errno = 0; /* strictly unnecessary */
184 266
185 if (req->type == REQ_READ || req->type == REQ_WRITE) 267 switch (req->type)
186 { 268 {
269 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break;
270 case REQ_WRITE: req->result = pwrite64(req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break;
271 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
272 case REQ_CLOSE: req->result = close (req->fd); break;
273 case REQ_STAT: req->result = stat64 (req->dataptr, req->statdata); break;
274 case REQ_LSTAT: req->result = lstat64 (req->dataptr, req->statdata); break;
275 case REQ_FSTAT: req->result = fstat64 (req->fd, req->statdata); break;
276
277 case REQ_QUIT:
278 default:
279 write (respipe[1], (void *)&req, sizeof (req));
187 errno = 0; 280 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 } 281 }
199 else
200 {
201 write (respipe[1], (void *)&req, sizeof (req));
202 break;
203 }
204 282
283 req->errorno = errno;
205 write (respipe[1], (void *)&req, sizeof (req)); 284 write (respipe[1], (void *)&req, sizeof (req));
206 } 285 }
207 286
208 return 0; 287 return 0;
209} 288}
210 289
211MODULE = Linux::AIO PACKAGE = Linux::AIO 290MODULE = Linux::AIO PACKAGE = Linux::AIO
212 291
213BOOT: 292BOOT:
214{ 293{
294 sigfillset (&fullsigset);
295 sigdelset (&fullsigset, SIGTERM);
296 sigdelset (&fullsigset, SIGQUIT);
297 sigdelset (&fullsigset, SIGABRT);
298 sigdelset (&fullsigset, SIGINT);
299
215 if (pipe (reqpipe) || pipe (respipe)) 300 if (pipe (reqpipe) || pipe (respipe))
216 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");
217 305
218 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) 306 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
219 croak ("cannot set result pipe to nonblocking mode"); 307 croak ("cannot set result pipe to nonblocking mode");
220} 308}
221 309
… …
237 { 325 {
238 end_thread (); 326 end_thread ();
239 cur--; 327 cur--;
240 } 328 }
241 329
242 poll_cb ();
243 while (started > nthreads) 330 while (started > nthreads)
244 { 331 {
245 sched_yield (); 332 fd_set rfd;
333 FD_ZERO(&rfd);
334 FD_SET(respipe[0], &rfd);
335
336 select (respipe[0] + 1, &rfd, 0, 0, 0);
246 poll_cb (); 337 poll_cb (aTHX);
247 } 338 }
248 339
249void 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
250aio_read(fh,offset,length,data,dataoffset,callback) 384aio_read(fh,offset,length,data,dataoffset,callback)
251 PerlIO * fh 385 InputStream fh
252 UV offset 386 UV offset
253 STRLEN length 387 IV length
254 SV * data 388 SV * data
255 STRLEN dataoffset 389 IV dataoffset
256 SV * callback 390 SV * callback
257 PROTOTYPE: $$$$$$ 391 PROTOTYPE: $$$$$$
258 ALIAS: 392 CODE:
259 aio_write = 1
260 CODE:
261 SvUPGRADE (data, SVt_PV);
262 SvPOK_on (data);
263 read_write (aTHX_ ix, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); 393 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
394
395void
396aio_write(fh,offset,length,data,dataoffset,callback)
397 OutputStream fh
398 UV offset
399 IV length
400 SV * data
401 IV dataoffset
402 SV * callback
403 PROTOTYPE: $$$$$$
404 CODE:
405 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
406
407void
408aio_stat(fh_or_path,callback)
409 SV * fh_or_path
410 SV * callback
411 PROTOTYPE: $$
412 ALIAS:
413 aio_lstat = 1
414 CODE:
415 aio_req req;
416
417 Newz (0, req, 1, aio_cb);
418
419 if (!req)
420 croak ("out of memory during aio_req allocation");
421
422 New (0, req->statdata, 1, struct stat64);
423
424 if (!req->statdata)
425 croak ("out of memory during aio_req->statdata allocation");
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 {
435 req->type = REQ_FSTAT;
436 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
437 }
438
439 req->callback = SvREFCNT_inc (callback);
440
441 send_req (req);
264 442
265int 443int
266poll_fileno() 444poll_fileno()
267 PROTOTYPE: 445 PROTOTYPE:
268 CODE: 446 CODE:

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