1 |
#define PERL_NO_GET_CONTEXT |
2 |
|
3 |
#include "EXTERN.h" |
4 |
#include "perl.h" |
5 |
#include "XSUB.h" |
6 |
|
7 |
#include <sys/types.h> |
8 |
#include <sys/stat.h> |
9 |
#include <unistd.h> |
10 |
#include <fcntl.h> |
11 |
#include <signal.h> |
12 |
#include <sched.h> |
13 |
|
14 |
typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
15 |
typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
16 |
typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
17 |
|
18 |
#define STACKSIZE (128 * sizeof (long)) /* yeah */ |
19 |
|
20 |
enum { |
21 |
REQ_QUIT, |
22 |
REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE, |
23 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK |
24 |
}; |
25 |
|
26 |
typedef struct { |
27 |
char stack[STACKSIZE]; |
28 |
} aio_thread; |
29 |
|
30 |
typedef struct aio_cb { |
31 |
struct aio_cb *next; |
32 |
|
33 |
int type; |
34 |
aio_thread *thread; |
35 |
|
36 |
int fd; |
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off_t offset; |
38 |
size_t length; |
39 |
ssize_t result; |
40 |
mode_t mode; /* open */ |
41 |
int errorno; |
42 |
SV *data, *callback; |
43 |
void *dataptr; |
44 |
STRLEN dataoffset; |
45 |
|
46 |
Stat_t *statdata; |
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} aio_cb; |
48 |
|
49 |
typedef aio_cb *aio_req; |
50 |
|
51 |
static int started; |
52 |
static int nreqs; |
53 |
static int reqpipe[2], respipe[2]; |
54 |
|
55 |
static aio_req qs, qe; /* queue start, queue end */ |
56 |
|
57 |
static int aio_proc(void *arg); |
58 |
|
59 |
static void |
60 |
start_thread (void) |
61 |
{ |
62 |
aio_thread *thr; |
63 |
|
64 |
New (0, thr, 1, aio_thread); |
65 |
|
66 |
if (clone (aio_proc, |
67 |
&(thr->stack[STACKSIZE - sizeof (long)]), |
68 |
CLONE_VM|CLONE_FS|CLONE_FILES, |
69 |
thr) >= 0) |
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started++; |
71 |
else |
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Safefree (thr); |
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} |
74 |
|
75 |
static void |
76 |
send_reqs (void) |
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{ |
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/* this write is atomic */ |
79 |
while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs) |
80 |
{ |
81 |
qs = qs->next; |
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if (!qs) qe = 0; |
83 |
} |
84 |
} |
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|
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static void |
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send_req (aio_req req) |
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{ |
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nreqs++; |
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req->next = 0; |
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|
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if (qe) |
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{ |
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qe->next = req; |
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qe = req; |
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} |
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else |
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qe = qs = req; |
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|
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send_reqs (); |
101 |
} |
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|
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static void |
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end_thread (void) |
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{ |
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aio_req req; |
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New (0, req, 1, aio_cb); |
108 |
req->type = REQ_QUIT; |
109 |
|
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send_req (req); |
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} |
112 |
|
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static void |
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read_write (pTHX_ |
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int dowrite, int fd, off_t offset, size_t length, |
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SV *data, STRLEN dataoffset, SV *callback) |
117 |
{ |
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aio_req req; |
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STRLEN svlen; |
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char *svptr = SvPV (data, svlen); |
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|
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SvUPGRADE (data, SVt_PV); |
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SvPOK_on (data); |
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|
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if (dataoffset < 0) |
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dataoffset += svlen; |
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|
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if (dataoffset < 0 || dataoffset > svlen) |
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croak ("data offset outside of string"); |
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|
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if (dowrite) |
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{ |
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/* write: check length and adjust. */ |
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if (length < 0 || length + dataoffset > svlen) |
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length = svlen - dataoffset; |
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} |
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else |
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{ |
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/* read: grow scalar as necessary */ |
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svptr = SvGROW (data, length + dataoffset); |
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} |
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|
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if (length < 0) |
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croak ("length must not be negative"); |
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|
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Newz (0, req, 1, aio_cb); |
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|
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if (!req) |
149 |
croak ("out of memory during aio_req allocation"); |
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|
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req->type = dowrite ? REQ_WRITE : REQ_READ; |
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req->fd = fd; |
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req->offset = offset; |
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req->length = length; |
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req->data = SvREFCNT_inc (data); |
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req->dataptr = (char *)svptr + dataoffset; |
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req->callback = SvREFCNT_inc (callback); |
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|
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send_req (req); |
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} |
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|
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static void |
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poll_wait () |
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{ |
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fd_set rfd; |
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FD_ZERO(&rfd); |
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FD_SET(respipe[0], &rfd); |
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|
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select (respipe[0] + 1, &rfd, 0, 0, 0); |
170 |
} |
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|
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static int |
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poll_cb (pTHX) |
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{ |
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dSP; |
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int count = 0; |
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aio_req req; |
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|
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while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
180 |
{ |
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nreqs--; |
182 |
|
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if (req->type == REQ_QUIT) |
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{ |
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Safefree (req->thread); |
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started--; |
187 |
} |
188 |
else |
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{ |
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int errorno = errno; |
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errno = req->errorno; |
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|
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if (req->type == REQ_READ) |
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SvCUR_set (req->data, req->dataoffset |
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+ req->result > 0 ? req->result : 0); |
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|
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if (req->data) |
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SvREFCNT_dec (req->data); |
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|
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if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
201 |
{ |
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PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
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PL_laststatval = req->result; |
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PL_statcache = *(req->statdata); |
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|
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Safefree (req->statdata); |
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} |
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|
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PUSHMARK (SP); |
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XPUSHs (sv_2mortal (newSViv (req->result))); |
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PUTBACK; |
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call_sv (req->callback, G_VOID); |
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SPAGAIN; |
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|
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if (req->callback) |
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SvREFCNT_dec (req->callback); |
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|
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errno = errorno; |
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count++; |
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} |
221 |
|
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Safefree (req); |
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} |
224 |
|
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if (qs) |
226 |
send_reqs (); |
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|
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return count; |
229 |
} |
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|
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static sigset_t fullsigset; |
232 |
|
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#undef errno |
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#include <asm/unistd.h> |
235 |
#include <sys/prctl.h> |
236 |
|
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#define COPY_STATDATA \ |
238 |
req->statdata->st_dev = statdata.st_dev; \ |
239 |
req->statdata->st_ino = statdata.st_ino; \ |
240 |
req->statdata->st_mode = statdata.st_mode; \ |
241 |
req->statdata->st_nlink = statdata.st_nlink; \ |
242 |
req->statdata->st_uid = statdata.st_uid; \ |
243 |
req->statdata->st_gid = statdata.st_gid; \ |
244 |
req->statdata->st_rdev = statdata.st_rdev; \ |
245 |
req->statdata->st_size = statdata.st_size; \ |
246 |
req->statdata->st_atime = statdata.st_atime; \ |
247 |
req->statdata->st_mtime = statdata.st_mtime; \ |
248 |
req->statdata->st_ctime = statdata.st_ctime; \ |
249 |
req->statdata->st_blksize = statdata.st_blksize; \ |
250 |
req->statdata->st_blocks = statdata.st_blocks; \ |
251 |
|
252 |
static int |
253 |
aio_proc (void *thr_arg) |
254 |
{ |
255 |
aio_thread *thr = thr_arg; |
256 |
aio_req req; |
257 |
int errno; |
258 |
|
259 |
/* this is very much kernel-specific :(:(:( */ |
260 |
/* we rely on gcc's ability to create closures. */ |
261 |
_syscall3(int,read,int,fd,char *,buf,size_t,count) |
262 |
_syscall3(int,write,int,fd,char *,buf,size_t,count) |
263 |
|
264 |
_syscall3(int,open,char *,pathname,int,flags,mode_t,mode) |
265 |
_syscall1(int,close,int,fd) |
266 |
|
267 |
#define arch64 (__ia64 || __alpha) |
268 |
|
269 |
#ifdef __NR_pread64 && !arch64 |
270 |
_syscall5(int,pread64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi) |
271 |
_syscall5(int,pwrite64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi) |
272 |
#elif __NR_pread |
273 |
_syscall4(int,pread,int,fd,char *,buf,size_t,count,offset_t,offset) |
274 |
_syscall4(int,pwrite,int,fd,char *,buf,size_t,count,offset_t,offset) |
275 |
#else |
276 |
# error "neither pread nor pread64 defined" |
277 |
#endif |
278 |
|
279 |
|
280 |
#ifdef __NR_stat64 && !arch64 |
281 |
_syscall2(int,stat64, const char *, filename, struct stat64 *, buf) |
282 |
_syscall2(int,lstat64, const char *, filename, struct stat64 *, buf) |
283 |
_syscall2(int,fstat64, int, fd, struct stat64 *, buf) |
284 |
#elif __NR_stat |
285 |
_syscall2(int,stat, const char *, filename, struct stat *, buf) |
286 |
_syscall2(int,lstat, const char *, filename, struct stat *, buf) |
287 |
_syscall2(int,fstat, int, fd, struct stat *, buf) |
288 |
#else |
289 |
# error "neither stat64 nor stat defined" |
290 |
#endif |
291 |
|
292 |
_syscall1(int,unlink, char *, filename); |
293 |
|
294 |
sigprocmask (SIG_SETMASK, &fullsigset, 0); |
295 |
prctl (PR_SET_PDEATHSIG, SIGKILL); |
296 |
|
297 |
/* then loop */ |
298 |
while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
299 |
{ |
300 |
req->thread = thr; |
301 |
errno = 0; /* strictly unnecessary */ |
302 |
|
303 |
switch (req->type) |
304 |
{ |
305 |
#ifdef __NR_pread64 |
306 |
case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break; |
307 |
case REQ_WRITE: req->result = pwrite64(req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break; |
308 |
#else |
309 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
310 |
case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
311 |
#endif |
312 |
#ifdef __NR_stat64 |
313 |
struct stat64 statdata; |
314 |
case REQ_STAT: req->result = stat64 (req->dataptr, &statdata); COPY_STATDATA; break; |
315 |
case REQ_LSTAT: req->result = lstat64 (req->dataptr, &statdata); COPY_STATDATA; break; |
316 |
case REQ_FSTAT: req->result = fstat64 (req->fd, &statdata); COPY_STATDATA; break; |
317 |
#else |
318 |
struct stat statdata; |
319 |
case REQ_STAT: req->result = stat (req->dataptr, &statdata); COPY_STATDATA; break; |
320 |
case REQ_LSTAT: req->result = lstat (req->dataptr, &statdata); COPY_STATDATA; break; |
321 |
case REQ_FSTAT: req->result = fstat (req->fd, &statdata); COPY_STATDATA; break; |
322 |
#endif |
323 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
324 |
case REQ_CLOSE: req->result = close (req->fd); break; |
325 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
326 |
|
327 |
case REQ_QUIT: |
328 |
default: |
329 |
write (respipe[1], (void *)&req, sizeof (req)); |
330 |
return 0; |
331 |
} |
332 |
|
333 |
req->errorno = errno; |
334 |
write (respipe[1], (void *)&req, sizeof (req)); |
335 |
} |
336 |
|
337 |
return 0; |
338 |
} |
339 |
|
340 |
MODULE = Linux::AIO PACKAGE = Linux::AIO |
341 |
|
342 |
BOOT: |
343 |
{ |
344 |
sigfillset (&fullsigset); |
345 |
sigdelset (&fullsigset, SIGTERM); |
346 |
sigdelset (&fullsigset, SIGQUIT); |
347 |
sigdelset (&fullsigset, SIGABRT); |
348 |
sigdelset (&fullsigset, SIGINT); |
349 |
|
350 |
if (pipe (reqpipe) || pipe (respipe)) |
351 |
croak ("unable to initialize request or result pipe"); |
352 |
|
353 |
if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) |
354 |
croak ("cannot set result pipe to nonblocking mode"); |
355 |
|
356 |
if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) |
357 |
croak ("cannot set result pipe to nonblocking mode"); |
358 |
} |
359 |
|
360 |
void |
361 |
min_parallel(nthreads) |
362 |
int nthreads |
363 |
PROTOTYPE: $ |
364 |
CODE: |
365 |
while (nthreads > started) |
366 |
start_thread (); |
367 |
|
368 |
void |
369 |
max_parallel(nthreads) |
370 |
int nthreads |
371 |
PROTOTYPE: $ |
372 |
CODE: |
373 |
int cur = started; |
374 |
while (cur > nthreads) |
375 |
{ |
376 |
end_thread (); |
377 |
cur--; |
378 |
} |
379 |
|
380 |
while (started > nthreads) |
381 |
{ |
382 |
poll_wait (); |
383 |
poll_cb (aTHX); |
384 |
} |
385 |
|
386 |
void |
387 |
aio_open(pathname,flags,mode,callback) |
388 |
SV * pathname |
389 |
int flags |
390 |
int mode |
391 |
SV * callback |
392 |
PROTOTYPE: $$$$ |
393 |
CODE: |
394 |
aio_req req; |
395 |
|
396 |
Newz (0, req, 1, aio_cb); |
397 |
|
398 |
if (!req) |
399 |
croak ("out of memory during aio_req allocation"); |
400 |
|
401 |
req->type = REQ_OPEN; |
402 |
req->data = newSVsv (pathname); |
403 |
req->dataptr = SvPV_nolen (req->data); |
404 |
req->fd = flags; |
405 |
req->mode = mode; |
406 |
req->callback = SvREFCNT_inc (callback); |
407 |
|
408 |
send_req (req); |
409 |
|
410 |
void |
411 |
aio_close(fh,callback) |
412 |
InputStream fh |
413 |
SV * callback |
414 |
PROTOTYPE: $$ |
415 |
CODE: |
416 |
aio_req req; |
417 |
|
418 |
Newz (0, req, 1, aio_cb); |
419 |
|
420 |
if (!req) |
421 |
croak ("out of memory during aio_req allocation"); |
422 |
|
423 |
req->type = REQ_CLOSE; |
424 |
req->fd = PerlIO_fileno (fh); |
425 |
req->callback = SvREFCNT_inc (callback); |
426 |
|
427 |
send_req (req); |
428 |
|
429 |
void |
430 |
aio_read(fh,offset,length,data,dataoffset,callback) |
431 |
InputStream fh |
432 |
UV offset |
433 |
IV length |
434 |
SV * data |
435 |
IV dataoffset |
436 |
SV * callback |
437 |
PROTOTYPE: $$$$$$ |
438 |
CODE: |
439 |
read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
440 |
|
441 |
void |
442 |
aio_write(fh,offset,length,data,dataoffset,callback) |
443 |
OutputStream fh |
444 |
UV offset |
445 |
IV length |
446 |
SV * data |
447 |
IV dataoffset |
448 |
SV * callback |
449 |
PROTOTYPE: $$$$$$ |
450 |
CODE: |
451 |
read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
452 |
|
453 |
void |
454 |
aio_stat(fh_or_path,callback) |
455 |
SV * fh_or_path |
456 |
SV * callback |
457 |
PROTOTYPE: $$ |
458 |
ALIAS: |
459 |
aio_lstat = 1 |
460 |
CODE: |
461 |
aio_req req; |
462 |
|
463 |
Newz (0, req, 1, aio_cb); |
464 |
|
465 |
if (!req) |
466 |
croak ("out of memory during aio_req allocation"); |
467 |
|
468 |
New (0, req->statdata, 1, Stat_t); |
469 |
|
470 |
if (!req->statdata) |
471 |
croak ("out of memory during aio_req->statdata allocation"); |
472 |
|
473 |
if (SvPOK (fh_or_path)) |
474 |
{ |
475 |
req->type = ix ? REQ_LSTAT : REQ_STAT; |
476 |
req->data = newSVsv (fh_or_path); |
477 |
req->dataptr = SvPV_nolen (req->data); |
478 |
} |
479 |
else |
480 |
{ |
481 |
req->type = REQ_FSTAT; |
482 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
483 |
} |
484 |
|
485 |
req->callback = SvREFCNT_inc (callback); |
486 |
|
487 |
send_req (req); |
488 |
|
489 |
void |
490 |
aio_unlink(pathname,callback) |
491 |
SV * pathname |
492 |
SV * callback |
493 |
PROTOTYPE: $$ |
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 |
req->type = REQ_UNLINK; |
503 |
req->data = newSVsv (pathname); |
504 |
req->dataptr = SvPV_nolen (req->data); |
505 |
req->callback = SvREFCNT_inc (callback); |
506 |
|
507 |
send_req (req); |
508 |
|
509 |
int |
510 |
poll_fileno() |
511 |
PROTOTYPE: |
512 |
CODE: |
513 |
RETVAL = respipe[0]; |
514 |
OUTPUT: |
515 |
RETVAL |
516 |
|
517 |
int |
518 |
poll_cb(...) |
519 |
PROTOTYPE: |
520 |
CODE: |
521 |
RETVAL = poll_cb (aTHX); |
522 |
OUTPUT: |
523 |
RETVAL |
524 |
|
525 |
void |
526 |
poll_wait() |
527 |
PROTOTYPE: |
528 |
CODE: |
529 |
poll_wait (); |
530 |
|
531 |
int |
532 |
nreqs() |
533 |
PROTOTYPE: |
534 |
CODE: |
535 |
RETVAL = nreqs; |
536 |
OUTPUT: |
537 |
RETVAL |
538 |
|