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Comparing Linux-AIO/AIO.xs (file contents):
Revision 1.1 by root, Tue Aug 14 03:18:53 2001 UTC vs.
Revision 1.13 by root, Mon Apr 1 20:30:08 2002 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
9#define STACKSIZE 128 /* yeah */ 16#define STACKSIZE 1024 /* yeah */
10 17
11#define REQ_EXIT 0 18enum { 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 19
15typedef struct { 20typedef struct {
16 char stack[STACKSIZE]; 21 char stack[STACKSIZE];
17} aio_thread; 22} aio_thread;
18 23
19typedef struct { 24typedef struct {
20 int type; 25 int type;
21 aio_thread *thread; 26 aio_thread *thread;
22 27
23/* read/write */ 28 SV *savesv;
29
24 int fd; 30 int fd;
25 off_t offset; 31 off_t offset;
26 size_t length; 32 size_t length;
27 ssize_t done; 33 ssize_t result;
34 mode_t mode; /* open */
28 int errorno; 35 int errorno;
29 36 SV *data, *callback;
30 SV *data;
31 void *dataptr; 37 void *dataptr;
32 STRLEN offset; 38 STRLEN dataoffset;
39
40 struct stat64 *statdata;
33} aio_cb; 41} aio_cb;
34 42
35typedef aio_cb *aio_req; 43typedef aio_cb *aio_req;
36 44
37static int started; 45static int started;
46static int nreqs;
38static int reqpipe[2], respipe[2]; 47static int reqpipe[2], respipe[2];
48
49static int aio_proc(void *arg);
39 50
40static void 51static void
41start_thread(void) 52start_thread(void)
42{ 53{
43 aio_thread *thr = NEW ( 54 aio_thread *thr;
55
56 New (0, thr, 1, aio_thread);
57
44 __clone (aio_proc, 58 if (clone (aio_proc,
59 &(thr->stack[STACKSIZE]),
60 CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND,
61 thr) >= 0)
62 started++;
63 else
64 Safefree (thr);
45} 65}
46 66
47static void 67static void
48end_thread(void) 68end_thread(void)
49{ 69{
50 aio_req req = 0; 70 aio_req req;
71 New (0, req, 1, aio_cb);
72 req->type = REQ_QUIT;
51 write (reqpipe[1], &req, sizeof (aio_req)); 73 write (reqpipe[1], &req, sizeof (aio_req));
52 nthreads--; 74}
75
76static void
77send_req (aio_req req)
78{
79 nreqs++;
80 write (reqpipe[1], &req, sizeof (aio_req));
81}
82
83static void
84read_write (pTHX_ int dowrite, int fd, off_t offset, size_t length,
85 SV *data, STRLEN dataoffset, SV*callback)
86{
87 aio_req req;
88 STRLEN svlen;
89 char *svptr = SvPV (data, svlen);
90
91 SvUPGRADE (data, SVt_PV);
92 SvPOK_on (data);
93
94 if (dataoffset < 0)
95 dataoffset += svlen;
96
97 if (dataoffset < 0 || dataoffset > svlen)
98 croak ("data offset outside of string");
99
100 if (dowrite)
101 {
102 /* write: check length and adjust. */
103 if (length < 0 || length + dataoffset > svlen)
104 length = svlen - dataoffset;
105 }
106 else
107 {
108 /* read: grow scalar as necessary */
109 svptr = SvGROW (data, length + dataoffset);
110 }
111
112 if (length < 0)
113 croak ("length must not be negative");
114
115 New (0, req, 1, aio_cb);
116
117 if (!req)
118 croak ("out of memory during aio_req allocation");
119
120 req->type = dowrite ? REQ_WRITE : REQ_READ;
121 req->fd = fd;
122 req->offset = offset;
123 req->length = length;
124 req->data = SvREFCNT_inc (data);
125 req->dataptr = (char *)svptr + dataoffset;
126 req->callback = SvREFCNT_inc (callback);
127
128 send_req (req);
129}
130
131static int
132poll_cb (pTHX)
133{
134 dSP;
135 int count = 0;
136 aio_req req;
137
138 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))
139 {
140 if (req->type == REQ_QUIT)
141 {
142 Safefree (req->thread);
143 started--;
144 }
145 else
146 {
147 int errorno = errno;
148 errno = req->errorno;
149
150 if (req->savesv)
151 SvREFCNT_dec (req->savesv);
152
153 if (req->type == REQ_READ)
154 SvCUR_set (req->data, req->dataoffset
155 + req->result > 0 ? req->result : 0);
156
157 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
158 {
159 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
160 PL_laststatval = req->result;
161 PL_statcache.st_dev = req->statdata->st_dev;
162 PL_statcache.st_ino = req->statdata->st_ino;
163 PL_statcache.st_mode = req->statdata->st_mode;
164 PL_statcache.st_nlink = req->statdata->st_nlink;
165 PL_statcache.st_uid = req->statdata->st_uid;
166 PL_statcache.st_gid = req->statdata->st_gid;
167 PL_statcache.st_rdev = req->statdata->st_rdev;
168 PL_statcache.st_size = req->statdata->st_size;
169 PL_statcache.st_atime = req->statdata->st_atime;
170 PL_statcache.st_mtime = req->statdata->st_mtime;
171 PL_statcache.st_ctime = req->statdata->st_ctime;
172 PL_statcache.st_blksize = req->statdata->st_blksize;
173 PL_statcache.st_blocks = req->statdata->st_blocks;
174
175 Safefree (req->statdata);
176 }
177
178 PUSHMARK (SP);
179 XPUSHs (sv_2mortal (newSViv (req->result)));
180 PUTBACK;
181 call_sv (req->callback, G_VOID);
182 SPAGAIN;
183
184 SvREFCNT_dec (req->data);
185 SvREFCNT_dec (req->callback);
186
187 errno = errorno;
188 nreqs--;
189 count++;
190 }
191
192 Safefree (req);
193 }
194
195 return count;
196}
197
198static sigset_t fullsigset;
199
200#undef errno
201#include <asm/unistd.h>
202
203static int
204aio_proc(void *thr_arg)
205{
206 aio_thread *thr = thr_arg;
207 aio_req req;
208 int errno;
209
210 /* we rely on gcc's ability to create closures. */
211 _syscall3(int,read,int,fd,char *,buf,size_t,count)
212 _syscall3(int,write,int,fd,char *,buf,size_t,count)
213
214 _syscall3(int,open,char *,pathname,int,flags,mode_t,mode)
215 _syscall1(int,close,int,fd)
216
217 _syscall4(int,pread,int,fd,char *,buf,size_t,count,off_t,offset)
218 _syscall4(int,pwrite,int,fd,char *,buf,size_t,count,off_t,offset)
219
220 _syscall2(int,stat64, const char *, filename, struct stat64 *, buf)
221 _syscall2(int,lstat64, const char *, filename, struct stat64 *, buf)
222 _syscall2(int,fstat64, int, fd, struct stat64 *, buf)
223
224 sigprocmask (SIG_SETMASK, &fullsigset, 0);
225
226 /* then loop */
227 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
228 {
229 req->thread = thr;
230 errno = 0;
231
232 if (req->type == REQ_READ)
233 req->result = pread (req->fd, req->dataptr, req->length, req->offset);
234 else if (req->type == REQ_WRITE)
235 req->result = pwrite (req->fd, req->dataptr, req->length, req->offset);
236 else if (req->type == REQ_OPEN)
237 req->result = open (req->dataptr, req->fd, req->mode);
238 else if (req->type == REQ_CLOSE)
239 req->result = close (req->fd);
240 else if (req->type == REQ_STAT)
241 req->result = stat64 (req->dataptr, req->statdata);
242 else if (req->type == REQ_LSTAT)
243 req->result = lstat64 (req->dataptr, req->statdata);
244 else if (req->type == REQ_FSTAT)
245 req->result = fstat64 (req->fd, req->statdata);
246 else
247 {
248 write (respipe[1], (void *)&req, sizeof (req));
249 break;
250 }
251
252 req->errorno = errno;
253 write (respipe[1], (void *)&req, sizeof (req));
254 }
255
256 return 0;
53} 257}
54 258
55MODULE = Linux::AIO PACKAGE = Linux::AIO 259MODULE = Linux::AIO PACKAGE = Linux::AIO
56 260
57BOOT: 261BOOT:
58{ 262{
263 sigfillset (&fullsigset);
264 sigdelset (&fullsigset, SIGTERM);
265 sigdelset (&fullsigset, SIGQUIT);
266 sigdelset (&fullsigset, SIGABRT);
267 sigdelset (&fullsigset, SIGINT);
268
59 if (pipe (reqpipe) || pipe (respipe)) 269 if (pipe (reqpipe) || pipe (respipe))
60 croak ("unable to initialize request or result pipe"); 270 croak ("unable to initialize request or result pipe");
271
272 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
273 croak ("cannot set result pipe to nonblocking mode");
61} 274}
62 275
63void 276void
64min_parallel(nthreads) 277min_parallel(nthreads)
65 int nthreads 278 int nthreads
279 PROTOTYPE: $
66 CODE: 280 CODE:
67 while (nthreads > started) 281 while (nthreads > started)
68 start_thread (); 282 start_thread ();
69 283
70void 284void
71max_parallel(nthreads) 285max_parallel(nthreads)
72 int nthreads 286 int nthreads
287 PROTOTYPE: $
73 CODE: 288 CODE:
289 int cur = started;
290 while (cur > nthreads)
291 {
292 end_thread ();
293 cur--;
294 }
295
296 poll_cb ();
74 while (started > nthreads) 297 while (started > nthreads)
298 {
299 sched_yield ();
300 fcntl (respipe[0], F_SETFL, 0);
301 poll_cb ();
302 fcntl (respipe[0], F_SETFL, O_NONBLOCK);
303 }
304
305void
306aio_open(pathname,flags,mode,callback)
307 SV * pathname
308 int flags
309 int mode
310 SV * callback
311 PROTOTYPE: $$$$
312 CODE:
313 aio_req req;
314
315 New (0, req, 1, aio_cb);
316
317 if (!req)
318 croak ("out of memory during aio_req allocation");
319
320 req->type = REQ_OPEN;
321 req->savesv = newSVsv (pathname);
322 req->dataptr = SvPV_nolen (req->savesv);
323 req->fd = flags;
324 req->mode = mode;
325 req->callback = SvREFCNT_inc (callback);
326
75 end_thread (); 327 send_req (req);
76 328
77void 329void
330aio_close(fh,callback)
331 InputStream fh
332 SV * callback
333 PROTOTYPE: $
334 CODE:
335 aio_req req;
336
337 New (0, req, 1, aio_cb);
338
339 if (!req)
340 croak ("out of memory during aio_req allocation");
341
342 req->type = REQ_CLOSE;
343 req->fd = PerlIO_fileno (fh);
344 req->callback = SvREFCNT_inc (callback);
345
346 send_req (req);
347
348void
78read(fh,offset,length,data,dataoffset,callback) 349aio_read(fh,offset,length,data,dataoffset,callback)
350 InputStream fh
351 UV offset
352 IV length
353 SV * data
354 IV dataoffset
355 SV * callback
356 PROTOTYPE: $$$$$$
357 CODE:
358 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
359
360void
361aio_write(fh,offset,length,data,dataoffset,callback)
362 OutputStream fh
363 UV offset
364 IV length
365 SV * data
366 IV dataoffset
367 SV * callback
368 PROTOTYPE: $$$$$$
369 CODE:
370 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
371
372void
373aio_stat(fh_or_path,callback)
374 SV * fh_or_path
375 SV * callback
376 PROTOTYPE: $$
377 ALIAS:
378 aio_lstat = 1
79 CODE: 379 CODE:
380 aio_req req;
381
382 New (0, req, 1, aio_cb);
383
384 if (!req)
385 croak ("out of memory during aio_req allocation");
386
387 New (0, req->statdata, 1, struct stat64);
388
389 if (!req->statdata)
390 croak ("out of memory during aio_req->statdata allocation");
391
392 if (SvPOK (fh_or_path))
393 {
394 req->type = ix ? REQ_LSTAT : REQ_STAT;
395 req->savesv = newSVsv (fh_or_path);
396 req->dataptr = SvPV_nolen (req->savesv);
397 }
398 else
399 {
400 req->type = REQ_FSTAT;
401 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
402 }
403
404 req->callback = SvREFCNT_inc (callback);
405
406 send_req (req);
407
408int
409poll_fileno()
410 PROTOTYPE:
411 CODE:
412 RETVAL = respipe[0];
413 OUTPUT:
414 RETVAL
415
416int
417poll_cb(...)
418 PROTOTYPE:
419 CODE:
420 RETVAL = poll_cb (aTHX);
421 OUTPUT:
422 RETVAL
423
424int
425nreqs()
426 PROTOTYPE:
427 CODE:
428 RETVAL = nreqs;
429 OUTPUT:
430 RETVAL
431

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