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Comparing Linux-AIO/AIO.xs (file contents):
Revision 1.3 by root, Tue Aug 14 04:33:50 2001 UTC vs.
Revision 1.16 by root, Wed May 5 10:13:30 2004 UTC

1#include "EXTERN.h" 1#include "EXTERN.h"
2#include "perl.h" 2#include "perl.h"
3#include "XSUB.h" 3#include "XSUB.h"
4 4
5#include <sys/types.h> 5#include <sys/types.h>
6#include <sys/stat.h>
6#include <unistd.h> 7#include <unistd.h>
8#include <fcntl.h>
9#include <signal.h>
7#include <sched.h> 10#include <sched.h>
8 11
12typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */
13typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
14typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
15
16#ifndef __NR_pread64
17# define __NR_pread64 __NR_pread
18#endif
19#ifndef __NR_pwrite64
20# define __NR_pwrite64 __NR_pwrite
21#endif
22
9#define STACKSIZE 128 /* yeah */ 23#define STACKSIZE 1024 /* yeah */
10 24
11#define REQ_QUIT 0 25enum { REQ_QUIT, REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE, REQ_STAT, REQ_LSTAT, REQ_FSTAT};
12#define REQ_READ 1
13#define REQ_WRITE 2
14 26
15typedef struct { 27typedef struct {
16 char stack[STACKSIZE]; 28 char stack[STACKSIZE];
17} aio_thread; 29} aio_thread;
18 30
19typedef struct { 31typedef struct {
20 int type; 32 int type;
21 aio_thread *thread; 33 aio_thread *thread;
22 34
23/* read/write */
24 int fd; 35 int fd;
25 off_t offset; 36 off_t offset;
26 size_t length; 37 size_t length;
27 ssize_t result; 38 ssize_t result;
39 mode_t mode; /* open */
28 int errorno; 40 int errorno;
29 41 SV *data, *callback;
30 SV *data;
31 void *dataptr; 42 void *dataptr;
32 STRLEN dataoffset; 43 STRLEN dataoffset;
44
45 struct stat64 *statdata;
33} aio_cb; 46} aio_cb;
34 47
35typedef aio_cb *aio_req; 48typedef aio_cb *aio_req;
36 49
37static int started; 50static int started;
51static int nreqs;
38static int reqpipe[2], respipe[2]; 52static int reqpipe[2], respipe[2];
39 53
40static int aio_proc(void *arg); 54static int aio_proc(void *arg);
41 55
42static void 56static void
… …
56} 70}
57 71
58static void 72static void
59end_thread(void) 73end_thread(void)
60{ 74{
61 aio_req req = 0; 75 aio_req req;
76 New (0, req, 1, aio_cb);
77 req->type = REQ_QUIT;
62 write (reqpipe[1], &req, sizeof (aio_req)); 78 write (reqpipe[1], &req, sizeof (aio_req));
63 started--;
64} 79}
65 80
66static void 81static void
67set_errno(int errorno) 82send_req (aio_req req)
68{ 83{
84 nreqs++;
85 write (reqpipe[1], &req, sizeof (aio_req));
86}
87
88static void
89read_write (pTHX_ int dowrite, int fd, off_t offset, size_t length,
90 SV *data, STRLEN dataoffset, SV*callback)
91{
92 aio_req req;
93 STRLEN svlen;
94 char *svptr = SvPV (data, svlen);
95
96 SvUPGRADE (data, SVt_PV);
97 SvPOK_on (data);
98
99 if (dataoffset < 0)
100 dataoffset += svlen;
101
102 if (dataoffset < 0 || dataoffset > svlen)
103 croak ("data offset outside of string");
104
105 if (dowrite)
106 {
107 /* write: check length and adjust. */
108 if (length < 0 || length + dataoffset > svlen)
109 length = svlen - dataoffset;
110 }
111 else
112 {
113 /* read: grow scalar as necessary */
114 svptr = SvGROW (data, length + dataoffset);
115 }
116
117 if (length < 0)
118 croak ("length must not be negative");
119
120 Newz (0, req, 1, aio_cb);
121
122 if (!req)
123 croak ("out of memory during aio_req allocation");
124
125 req->type = dowrite ? REQ_WRITE : REQ_READ;
126 req->fd = fd;
127 req->offset = offset;
128 req->length = length;
129 req->data = SvREFCNT_inc (data);
130 req->dataptr = (char *)svptr + dataoffset;
131 req->callback = SvREFCNT_inc (callback);
132
133 send_req (req);
134}
135
136static int
137poll_cb (pTHX)
138{
139 dSP;
140 int count = 0;
141 aio_req req;
142
143 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))
144 {
145 if (req->type == REQ_QUIT)
146 {
147 Safefree (req->thread);
148 started--;
149 }
150 else
151 {
152 int errorno = errno;
153 errno = req->errorno;
154
155 if (req->type == REQ_READ)
156 SvCUR_set (req->data, req->dataoffset
157 + req->result > 0 ? req->result : 0);
158
159 if (req->data)
160 SvREFCNT_dec (req->data);
161
162 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
163 {
164 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
165 PL_laststatval = req->result;
166 PL_statcache.st_dev = req->statdata->st_dev;
167 PL_statcache.st_ino = req->statdata->st_ino;
168 PL_statcache.st_mode = req->statdata->st_mode;
169 PL_statcache.st_nlink = req->statdata->st_nlink;
170 PL_statcache.st_uid = req->statdata->st_uid;
171 PL_statcache.st_gid = req->statdata->st_gid;
172 PL_statcache.st_rdev = req->statdata->st_rdev;
173 PL_statcache.st_size = req->statdata->st_size;
174 PL_statcache.st_atime = req->statdata->st_atime;
175 PL_statcache.st_mtime = req->statdata->st_mtime;
176 PL_statcache.st_ctime = req->statdata->st_ctime;
177 PL_statcache.st_blksize = req->statdata->st_blksize;
178 PL_statcache.st_blocks = req->statdata->st_blocks;
179
180 Safefree (req->statdata);
181 }
182
183 PUSHMARK (SP);
184 XPUSHs (sv_2mortal (newSViv (req->result)));
185 PUTBACK;
186 call_sv (req->callback, G_VOID);
187 SPAGAIN;
188
189 if (req->callback)
190 SvREFCNT_dec (req->callback);
191
69 errno = errorno; 192 errno = errorno;
193 nreqs--;
194 count++;
195 }
196
197 Safefree (req);
198 }
199
200 return count;
70} 201}
202
203static sigset_t fullsigset;
71 204
72#undef errno 205#undef errno
73#include <asm/unistd.h> 206#include <asm/unistd.h>
74 207
75static int 208static int
76aio_proc(void *thr_arg) 209aio_proc(void *thr_arg)
77{ 210{
78 aio_thread *thr = thr_arg; 211 aio_thread *thr = thr_arg;
79 int sig; 212 aio_req req;
80 int errno; 213 int errno;
81 aio_req req;
82 214
215 /* this is very much x86 and kernel-specific :(:(:( */
83 /* we rely on gcc's ability to create closures. */ 216 /* we rely on gcc's ability to create closures. */
84 _syscall3(int,lseek,int,fd,off_t,offset,int,whence);
85 _syscall3(int,read,int,fd,char *,buf,off_t,count); 217 _syscall3(int,read,int,fd,char *,buf,size_t,count)
86 _syscall3(int,write,int,fd,char *,buf,off_t,count); 218 _syscall3(int,write,int,fd,char *,buf,size_t,count)
87 219
88 /* first get rid of any signals */ 220 _syscall3(int,open,char *,pathname,int,flags,mode_t,mode)
89 for (sig = 1; sig < _NSIG; sig++) 221 _syscall1(int,close,int,fd)
90 if (sig != SIGTERM) 222
91 signal (sig, SIG_IGN); 223 _syscall5(int,pread64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi)
92 224 _syscall5(int,pwrite64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi)
225
226 _syscall2(int,stat64, const char *, filename, struct stat64 *, buf)
227 _syscall2(int,lstat64, const char *, filename, struct stat64 *, buf)
228 _syscall2(int,fstat64, int, fd, struct stat64 *, buf)
229
230 sigprocmask (SIG_SETMASK, &fullsigset, 0);
231
93 /* then loop */ 232 /* then loop */
94 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 233 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
95 { 234 {
96 req->thread = thr; 235 req->thread = thr;
236 errno = 0; /* strictly unnecessary */
97 237
98 if (req->type == REQ_READ || req->type == REQ_WRITE)
99 {
100 errno = 0;
101
102 if (lseek (req->fd, req->offset, SEEK_SET) == req->offset)
103 {
104 if (req->type == REQ_READ) 238 if (req->type == REQ_READ)
105 req->result = read (req->fd, req->dataptr, req->length); 239 req->result = pread64 (req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32);
106 else 240 else if (req->type == REQ_WRITE)
107 req->result = write(req->fd, req->dataptr, req->length); 241 req->result = pwrite64(req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32);
108 } 242 else if (req->type == REQ_OPEN)
109 243 req->result = open (req->dataptr, req->fd, req->mode);
110 req->errorno = errno; 244 else if (req->type == REQ_CLOSE)
111 } 245 req->result = close (req->fd);
246 else if (req->type == REQ_STAT)
247 req->result = stat64 (req->dataptr, req->statdata);
248 else if (req->type == REQ_LSTAT)
249 req->result = lstat64 (req->dataptr, req->statdata);
250 else if (req->type == REQ_FSTAT)
251 req->result = fstat64 (req->fd, req->statdata);
112 else 252 else
113 { 253 {
114 write (respipe[1], (void *)&req, sizeof (req)); 254 write (respipe[1], (void *)&req, sizeof (req));
115 break; 255 break;
116 } 256 }
117 257
258 req->errorno = errno;
118 write (respipe[1], (void *)&req, sizeof (req)); 259 write (respipe[1], (void *)&req, sizeof (req));
119 } 260 }
120 261
121 return 0; 262 return 0;
122} 263}
123 264
124MODULE = Linux::AIO PACKAGE = Linux::AIO 265MODULE = Linux::AIO PACKAGE = Linux::AIO
125 266
126BOOT: 267BOOT:
127{ 268{
269 sigfillset (&fullsigset);
270 sigdelset (&fullsigset, SIGTERM);
271 sigdelset (&fullsigset, SIGQUIT);
272 sigdelset (&fullsigset, SIGABRT);
273 sigdelset (&fullsigset, SIGINT);
274
128 if (pipe (reqpipe) || pipe (respipe)) 275 if (pipe (reqpipe) || pipe (respipe))
129 croak ("unable to initialize request or result pipe"); 276 croak ("unable to initialize request or result pipe");
277
278 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
279 croak ("cannot set result pipe to nonblocking mode");
130} 280}
131 281
132void 282void
133min_parallel(nthreads) 283min_parallel(nthreads)
134 int nthreads 284 int nthreads
285 PROTOTYPE: $
135 CODE: 286 CODE:
136 while (nthreads > started) 287 while (nthreads > started)
137 start_thread (); 288 start_thread ();
138 289
139void 290void
140max_parallel(nthreads) 291max_parallel(nthreads)
141 int nthreads 292 int nthreads
293 PROTOTYPE: $
142 CODE: 294 CODE:
295 int cur = started;
296 while (cur > nthreads)
297 {
298 end_thread ();
299 cur--;
300 }
301
143 while (started > nthreads) 302 while (started > nthreads)
303 {
304 fd_set rfd;
305 FD_ZERO(&rfd);
306 FD_SET(respipe[0], &rfd);
307
308 select (respipe[0] + 1, &rfd, 0, 0, 0);
309 poll_cb ();
310 }
311
312void
313aio_open(pathname,flags,mode,callback)
314 SV * pathname
315 int flags
316 int mode
317 SV * callback
318 PROTOTYPE: $$$$
319 CODE:
320 aio_req req;
321
322 Newz (0, req, 1, aio_cb);
323
324 if (!req)
325 croak ("out of memory during aio_req allocation");
326
327 req->type = REQ_OPEN;
328 req->data = newSVsv (pathname);
329 req->dataptr = SvPV_nolen (req->data);
330 req->fd = flags;
331 req->mode = mode;
332 req->callback = SvREFCNT_inc (callback);
333
144 end_thread (); 334 send_req (req);
145 335
146void 336void
337aio_close(fh,callback)
338 InputStream fh
339 SV * callback
340 PROTOTYPE: $$
341 CODE:
342 aio_req req;
343
344 Newz (0, req, 1, aio_cb);
345
346 if (!req)
347 croak ("out of memory during aio_req allocation");
348
349 req->type = REQ_CLOSE;
350 req->fd = PerlIO_fileno (fh);
351 req->callback = SvREFCNT_inc (callback);
352
353 send_req (req);
354
355void
147read(fh,offset,length,data,dataoffset,callback) 356aio_read(fh,offset,length,data,dataoffset,callback)
148 ALIAS: 357 InputStream fh
149 write = 1 358 UV offset
359 IV length
360 SV * data
361 IV dataoffset
362 SV * callback
363 PROTOTYPE: $$$$$$
364 CODE:
365 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
366
367void
368aio_write(fh,offset,length,data,dataoffset,callback)
369 OutputStream fh
370 UV offset
371 IV length
372 SV * data
373 IV dataoffset
374 SV * callback
375 PROTOTYPE: $$$$$$
376 CODE:
377 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
378
379void
380aio_stat(fh_or_path,callback)
381 SV * fh_or_path
382 SV * callback
383 PROTOTYPE: $$
384 ALIAS:
385 aio_lstat = 1
150 CODE: 386 CODE:
387 aio_req req;
388
389 Newz (0, req, 1, aio_cb);
390
391 if (!req)
392 croak ("out of memory during aio_req allocation");
393
394 New (0, req->statdata, 1, struct stat64);
395
396 if (!req->statdata)
397 croak ("out of memory during aio_req->statdata allocation");
398
399 if (SvPOK (fh_or_path))
400 {
401 req->type = ix ? REQ_LSTAT : REQ_STAT;
402 req->data = newSVsv (fh_or_path);
403 req->dataptr = SvPV_nolen (req->data);
404 }
405 else
406 {
407 req->type = REQ_FSTAT;
408 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
409 }
410
411 req->callback = SvREFCNT_inc (callback);
412
413 send_req (req);
414
415int
416poll_fileno()
417 PROTOTYPE:
418 CODE:
419 RETVAL = respipe[0];
420 OUTPUT:
421 RETVAL
422
423int
424poll_cb(...)
425 PROTOTYPE:
426 CODE:
427 RETVAL = poll_cb (aTHX);
428 OUTPUT:
429 RETVAL
430
431int
432nreqs()
433 PROTOTYPE:
434 CODE:
435 RETVAL = nreqs;
436 OUTPUT:
437 RETVAL
438

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