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> |
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#include <sched.h> |
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#include <endian.h> |
14 |
|
15 |
#include <pthread.h> |
16 |
#include <sys/syscall.h> |
17 |
|
18 |
typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
19 |
typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
20 |
typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
21 |
|
22 |
#if __i386 || __amd64 |
23 |
# define STACKSIZE ( 256 * sizeof (long)) |
24 |
#elif __ia64 |
25 |
# define STACKSIZE (8192 * sizeof (long)) |
26 |
#else |
27 |
# define STACKSIZE ( 512 * sizeof (long)) |
28 |
#endif |
29 |
|
30 |
enum { |
31 |
REQ_QUIT, |
32 |
REQ_OPEN, REQ_CLOSE, |
33 |
REQ_READ, REQ_WRITE, REQ_READAHEAD, |
34 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, |
35 |
REQ_FSYNC, REQ_FDATASYNC, |
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}; |
37 |
|
38 |
typedef struct aio_cb { |
39 |
struct aio_cb *next; |
40 |
|
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int type; |
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|
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int fd; |
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off_t offset; |
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size_t length; |
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ssize_t result; |
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mode_t mode; /* open */ |
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int errorno; |
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SV *data, *callback; |
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void *dataptr; |
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STRLEN dataoffset; |
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|
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Stat_t *statdata; |
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} aio_cb; |
55 |
|
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typedef aio_cb *aio_req; |
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|
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static int started; |
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static int nreqs; |
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static int reqpipe[2], respipe[2]; |
61 |
|
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static aio_req qs, qe; /* queue start, queue end */ |
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|
64 |
static void *aio_proc(void *arg); |
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|
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static void |
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start_thread (void) |
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{ |
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sigset_t fullsigset, oldsigset; |
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pthread_t tid; |
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pthread_attr_t attr; |
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|
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pthread_attr_init (&attr); |
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pthread_attr_setstacksize (&attr, STACKSIZE); |
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pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
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|
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sigfillset (&fullsigset); |
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sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
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|
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if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
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started++; |
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|
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sigprocmask (SIG_SETMASK, &oldsigset, 0); |
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} |
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|
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static void |
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send_reqs (void) |
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{ |
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/* this write is atomic */ |
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while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs) |
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{ |
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qs = qs->next; |
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if (!qs) qe = 0; |
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} |
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} |
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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 (); |
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} |
113 |
|
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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); |
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req->type = REQ_QUIT; |
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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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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) |
128 |
{ |
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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) |
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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); |
181 |
} |
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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)) |
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{ |
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nreqs--; |
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|
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if (req->type == REQ_QUIT) |
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started--; |
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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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|
208 |
if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
209 |
{ |
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PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
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PL_laststatval = req->result; |
212 |
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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|
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if (req->type == REQ_OPEN) |
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{ |
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/* convert fd to fh */ |
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SV *fh; |
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|
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PUTBACK; |
226 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
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SPAGAIN; |
228 |
|
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fh = POPs; |
230 |
|
231 |
PUSHMARK (SP); |
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XPUSHs (fh); |
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} |
234 |
|
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PUTBACK; |
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call_sv (req->callback, G_VOID | G_EVAL); |
237 |
SPAGAIN; |
238 |
|
239 |
if (req->callback) |
240 |
SvREFCNT_dec (req->callback); |
241 |
|
242 |
errno = errorno; |
243 |
count++; |
244 |
} |
245 |
|
246 |
Safefree (req); |
247 |
} |
248 |
|
249 |
if (qs) |
250 |
send_reqs (); |
251 |
|
252 |
return count; |
253 |
} |
254 |
|
255 |
static void * |
256 |
aio_proc (void *thr_arg) |
257 |
{ |
258 |
aio_req req; |
259 |
|
260 |
/* then loop */ |
261 |
while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
262 |
{ |
263 |
errno = 0; /* strictly unnecessary */ |
264 |
|
265 |
switch (req->type) |
266 |
{ |
267 |
case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; |
268 |
case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; |
269 |
#if SYS_readahead |
270 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
271 |
#else |
272 |
case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break; |
273 |
#endif |
274 |
|
275 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
276 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
277 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
278 |
|
279 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
280 |
case REQ_CLOSE: req->result = close (req->fd); break; |
281 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
282 |
|
283 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
284 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
285 |
|
286 |
case REQ_QUIT: |
287 |
write (respipe[1], (void *)&req, sizeof (req)); |
288 |
return 0; |
289 |
|
290 |
default: |
291 |
req->result = ENOSYS; |
292 |
break; |
293 |
} |
294 |
|
295 |
req->errorno = errno; |
296 |
write (respipe[1], (void *)&req, sizeof (req)); |
297 |
} |
298 |
|
299 |
return 0; |
300 |
} |
301 |
|
302 |
MODULE = IO::AIO PACKAGE = IO::AIO |
303 |
|
304 |
BOOT: |
305 |
{ |
306 |
if (pipe (reqpipe) || pipe (respipe)) |
307 |
croak ("unable to initialize request or result pipe"); |
308 |
|
309 |
if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) |
310 |
croak ("cannot set result pipe to nonblocking mode"); |
311 |
|
312 |
if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) |
313 |
croak ("cannot set result pipe to nonblocking mode"); |
314 |
} |
315 |
|
316 |
void |
317 |
min_parallel(nthreads) |
318 |
int nthreads |
319 |
PROTOTYPE: $ |
320 |
CODE: |
321 |
while (nthreads > started) |
322 |
start_thread (); |
323 |
|
324 |
void |
325 |
max_parallel(nthreads) |
326 |
int nthreads |
327 |
PROTOTYPE: $ |
328 |
CODE: |
329 |
{ |
330 |
int cur = started; |
331 |
while (cur > nthreads) |
332 |
{ |
333 |
end_thread (); |
334 |
cur--; |
335 |
} |
336 |
|
337 |
while (started > nthreads) |
338 |
{ |
339 |
poll_wait (); |
340 |
poll_cb (aTHX); |
341 |
} |
342 |
} |
343 |
|
344 |
void |
345 |
aio_open(pathname,flags,mode,callback) |
346 |
SV * pathname |
347 |
int flags |
348 |
int mode |
349 |
SV * callback |
350 |
PROTOTYPE: $$$$ |
351 |
CODE: |
352 |
{ |
353 |
aio_req req; |
354 |
|
355 |
Newz (0, req, 1, aio_cb); |
356 |
|
357 |
if (!req) |
358 |
croak ("out of memory during aio_req allocation"); |
359 |
|
360 |
req->type = REQ_OPEN; |
361 |
req->data = newSVsv (pathname); |
362 |
req->dataptr = SvPV_nolen (req->data); |
363 |
req->fd = flags; |
364 |
req->mode = mode; |
365 |
req->callback = SvREFCNT_inc (callback); |
366 |
|
367 |
send_req (req); |
368 |
} |
369 |
|
370 |
void |
371 |
aio_close(fh,callback) |
372 |
InputStream fh |
373 |
SV * callback |
374 |
PROTOTYPE: $$ |
375 |
ALIAS: |
376 |
aio_close = REQ_CLOSE |
377 |
aio_fsync = REQ_FSYNC |
378 |
aio_fdatasync = REQ_FDATASYNC |
379 |
CODE: |
380 |
{ |
381 |
aio_req req; |
382 |
|
383 |
Newz (0, req, 1, aio_cb); |
384 |
|
385 |
if (!req) |
386 |
croak ("out of memory during aio_req allocation"); |
387 |
|
388 |
req->type = ix; |
389 |
req->fd = PerlIO_fileno (fh); |
390 |
req->callback = SvREFCNT_inc (callback); |
391 |
|
392 |
send_req (req); |
393 |
} |
394 |
|
395 |
void |
396 |
aio_read(fh,offset,length,data,dataoffset,callback) |
397 |
InputStream fh |
398 |
UV offset |
399 |
IV length |
400 |
SV * data |
401 |
IV dataoffset |
402 |
SV * callback |
403 |
PROTOTYPE: $$$$$$ |
404 |
CODE: |
405 |
read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
406 |
|
407 |
void |
408 |
aio_write(fh,offset,length,data,dataoffset,callback) |
409 |
OutputStream fh |
410 |
UV offset |
411 |
IV length |
412 |
SV * data |
413 |
IV dataoffset |
414 |
SV * callback |
415 |
PROTOTYPE: $$$$$$ |
416 |
CODE: |
417 |
read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
418 |
|
419 |
void |
420 |
aio_readahead(fh,offset,length,callback) |
421 |
InputStream fh |
422 |
UV offset |
423 |
IV length |
424 |
SV * callback |
425 |
PROTOTYPE: $$$$ |
426 |
CODE: |
427 |
{ |
428 |
aio_req req; |
429 |
|
430 |
if (length < 0) |
431 |
croak ("length must not be negative"); |
432 |
|
433 |
Newz (0, req, 1, aio_cb); |
434 |
|
435 |
if (!req) |
436 |
croak ("out of memory during aio_req allocation"); |
437 |
|
438 |
req->type = REQ_READAHEAD; |
439 |
req->fd = PerlIO_fileno (fh); |
440 |
req->offset = offset; |
441 |
req->length = length; |
442 |
req->callback = SvREFCNT_inc (callback); |
443 |
|
444 |
send_req (req); |
445 |
} |
446 |
|
447 |
void |
448 |
aio_stat(fh_or_path,callback) |
449 |
SV * fh_or_path |
450 |
SV * callback |
451 |
PROTOTYPE: $$ |
452 |
ALIAS: |
453 |
aio_lstat = 1 |
454 |
CODE: |
455 |
{ |
456 |
aio_req req; |
457 |
|
458 |
Newz (0, req, 1, aio_cb); |
459 |
|
460 |
if (!req) |
461 |
croak ("out of memory during aio_req allocation"); |
462 |
|
463 |
New (0, req->statdata, 1, Stat_t); |
464 |
|
465 |
if (!req->statdata) |
466 |
croak ("out of memory during aio_req->statdata allocation"); |
467 |
|
468 |
if (SvPOK (fh_or_path)) |
469 |
{ |
470 |
req->type = ix ? REQ_LSTAT : REQ_STAT; |
471 |
req->data = newSVsv (fh_or_path); |
472 |
req->dataptr = SvPV_nolen (req->data); |
473 |
} |
474 |
else |
475 |
{ |
476 |
req->type = REQ_FSTAT; |
477 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
478 |
} |
479 |
|
480 |
req->callback = SvREFCNT_inc (callback); |
481 |
|
482 |
send_req (req); |
483 |
} |
484 |
|
485 |
void |
486 |
aio_unlink(pathname,callback) |
487 |
SV * pathname |
488 |
SV * callback |
489 |
PROTOTYPE: $$ |
490 |
CODE: |
491 |
{ |
492 |
aio_req req; |
493 |
|
494 |
Newz (0, req, 1, aio_cb); |
495 |
|
496 |
if (!req) |
497 |
croak ("out of memory during aio_req allocation"); |
498 |
|
499 |
req->type = REQ_UNLINK; |
500 |
req->data = newSVsv (pathname); |
501 |
req->dataptr = SvPV_nolen (req->data); |
502 |
req->callback = SvREFCNT_inc (callback); |
503 |
|
504 |
send_req (req); |
505 |
} |
506 |
|
507 |
int |
508 |
poll_fileno() |
509 |
PROTOTYPE: |
510 |
CODE: |
511 |
RETVAL = respipe[0]; |
512 |
OUTPUT: |
513 |
RETVAL |
514 |
|
515 |
int |
516 |
poll_cb(...) |
517 |
PROTOTYPE: |
518 |
CODE: |
519 |
RETVAL = poll_cb (aTHX); |
520 |
OUTPUT: |
521 |
RETVAL |
522 |
|
523 |
void |
524 |
poll_wait() |
525 |
PROTOTYPE: |
526 |
CODE: |
527 |
poll_wait (); |
528 |
|
529 |
int |
530 |
nreqs() |
531 |
PROTOTYPE: |
532 |
CODE: |
533 |
RETVAL = nreqs; |
534 |
OUTPUT: |
535 |
RETVAL |
536 |
|