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root |
1.1 |
#define PERL_NO_GET_CONTEXT |
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#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include <signal.h> |
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#include <sched.h> |
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#include <endian.h> |
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#include <pthread.h> |
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#include <sys/syscall.h> |
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typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
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typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
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typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
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#if __i386 || __amd64 |
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# define STACKSIZE ( 256 * sizeof (long)) |
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#elif __ia64 |
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# define STACKSIZE (8192 * sizeof (long)) |
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#else |
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# define STACKSIZE ( 512 * sizeof (long)) |
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#endif |
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enum { |
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REQ_QUIT, |
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REQ_OPEN, REQ_CLOSE, |
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REQ_READ, REQ_WRITE, REQ_READAHEAD, |
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REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, |
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REQ_FSYNC, REQ_FDATASYNC, |
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}; |
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typedef struct aio_cb { |
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struct aio_cb *next; |
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int type; |
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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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Stat_t *statdata; |
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} aio_cb; |
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typedef aio_cb *aio_req; |
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static int started; |
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static int nreqs; |
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static int reqpipe[2], respipe[2]; |
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static aio_req qs, qe; /* queue start, queue end */ |
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static void *aio_proc(void *arg); |
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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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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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sigfillset (&fullsigset); |
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sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
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if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
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started++; |
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sigprocmask (SIG_SETMASK, &oldsigset, 0); |
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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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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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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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send_reqs (); |
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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); |
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req->type = REQ_QUIT; |
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send_req (req); |
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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) |
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{ |
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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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SvUPGRADE (data, SVt_PV); |
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SvPOK_on (data); |
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if (dataoffset < 0) |
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dataoffset += svlen; |
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if (dataoffset < 0 || dataoffset > svlen) |
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croak ("data offset outside of string"); |
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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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if (length < 0) |
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croak ("length must not be negative"); |
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Newz (0, req, 1, aio_cb); |
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if (!req) |
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croak ("out of memory during aio_req allocation"); |
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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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send_req (req); |
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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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select (respipe[0] + 1, &rfd, 0, 0, 0); |
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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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while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
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{ |
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nreqs--; |
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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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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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if (req->data) |
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SvREFCNT_dec (req->data); |
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if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
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{ |
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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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Safefree (req->statdata); |
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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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if (req->callback) |
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SvREFCNT_dec (req->callback); |
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errno = errorno; |
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count++; |
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} |
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Safefree (req); |
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} |
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if (qs) |
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send_reqs (); |
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return count; |
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} |
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static void * |
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aio_proc (void *thr_arg) |
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{ |
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aio_req req; |
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/* then loop */ |
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while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
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{ |
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errno = 0; /* strictly unnecessary */ |
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switch (req->type) |
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{ |
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case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; |
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case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; |
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#if SYS_readahead |
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case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
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#else |
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case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break; |
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#endif |
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case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
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case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
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case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
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case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
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case REQ_CLOSE: req->result = close (req->fd); break; |
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case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
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case REQ_FSYNC: req->result = fsync (req->fd); break; |
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case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
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case REQ_QUIT: |
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write (respipe[1], (void *)&req, sizeof (req)); |
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return 0; |
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default: |
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req->result = ENOSYS; |
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break; |
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} |
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req->errorno = errno; |
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write (respipe[1], (void *)&req, sizeof (req)); |
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} |
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return 0; |
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} |
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MODULE = IO::AIO PACKAGE = IO::AIO |
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BOOT: |
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{ |
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if (pipe (reqpipe) || pipe (respipe)) |
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croak ("unable to initialize request or result pipe"); |
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if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) |
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croak ("cannot set result pipe to nonblocking mode"); |
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if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) |
297 |
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croak ("cannot set result pipe to nonblocking mode"); |
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} |
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void |
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min_parallel(nthreads) |
302 |
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int nthreads |
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PROTOTYPE: $ |
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CODE: |
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while (nthreads > started) |
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start_thread (); |
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void |
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max_parallel(nthreads) |
310 |
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int nthreads |
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PROTOTYPE: $ |
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CODE: |
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{ |
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int cur = started; |
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while (cur > nthreads) |
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{ |
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end_thread (); |
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cur--; |
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} |
320 |
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321 |
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while (started > nthreads) |
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{ |
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poll_wait (); |
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poll_cb (aTHX); |
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} |
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} |
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328 |
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void |
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aio_open(pathname,flags,mode,callback) |
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SV * pathname |
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int flags |
332 |
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int mode |
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SV * callback |
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PROTOTYPE: $$$$ |
335 |
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CODE: |
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{ |
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aio_req req; |
338 |
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339 |
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Newz (0, req, 1, aio_cb); |
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341 |
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if (!req) |
342 |
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croak ("out of memory during aio_req allocation"); |
343 |
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344 |
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req->type = REQ_OPEN; |
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req->data = newSVsv (pathname); |
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req->dataptr = SvPV_nolen (req->data); |
347 |
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req->fd = flags; |
348 |
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req->mode = mode; |
349 |
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req->callback = SvREFCNT_inc (callback); |
350 |
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351 |
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send_req (req); |
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} |
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354 |
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void |
355 |
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aio_close(fh,callback) |
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InputStream fh |
357 |
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SV * callback |
358 |
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PROTOTYPE: $$ |
359 |
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ALIAS: |
360 |
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aio_close = REQ_CLOSE |
361 |
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aio_fsync = REQ_FSYNC |
362 |
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aio_fdatasync = REQ_FDATASYNC |
363 |
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CODE: |
364 |
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{ |
365 |
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aio_req req; |
366 |
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367 |
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Newz (0, req, 1, aio_cb); |
368 |
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369 |
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if (!req) |
370 |
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croak ("out of memory during aio_req allocation"); |
371 |
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372 |
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req->type = ix; |
373 |
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req->fd = PerlIO_fileno (fh); |
374 |
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req->callback = SvREFCNT_inc (callback); |
375 |
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376 |
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send_req (req); |
377 |
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} |
378 |
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379 |
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void |
380 |
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aio_read(fh,offset,length,data,dataoffset,callback) |
381 |
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InputStream fh |
382 |
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UV offset |
383 |
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IV length |
384 |
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SV * data |
385 |
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IV dataoffset |
386 |
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SV * callback |
387 |
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PROTOTYPE: $$$$$$ |
388 |
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CODE: |
389 |
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read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
390 |
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391 |
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void |
392 |
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aio_write(fh,offset,length,data,dataoffset,callback) |
393 |
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OutputStream fh |
394 |
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UV offset |
395 |
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IV length |
396 |
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SV * data |
397 |
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IV dataoffset |
398 |
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SV * callback |
399 |
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PROTOTYPE: $$$$$$ |
400 |
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CODE: |
401 |
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read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
402 |
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403 |
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void |
404 |
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aio_readahead(fh,offset,length,callback) |
405 |
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InputStream fh |
406 |
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UV offset |
407 |
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IV length |
408 |
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SV * callback |
409 |
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PROTOTYPE: $$$$ |
410 |
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CODE: |
411 |
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{ |
412 |
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aio_req req; |
413 |
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|
414 |
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if (length < 0) |
415 |
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croak ("length must not be negative"); |
416 |
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|
417 |
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Newz (0, req, 1, aio_cb); |
418 |
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419 |
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if (!req) |
420 |
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croak ("out of memory during aio_req allocation"); |
421 |
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422 |
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req->type = REQ_READAHEAD; |
423 |
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req->fd = PerlIO_fileno (fh); |
424 |
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req->offset = offset; |
425 |
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req->length = length; |
426 |
|
|
req->callback = SvREFCNT_inc (callback); |
427 |
|
|
|
428 |
|
|
send_req (req); |
429 |
|
|
} |
430 |
|
|
|
431 |
|
|
void |
432 |
|
|
aio_stat(fh_or_path,callback) |
433 |
|
|
SV * fh_or_path |
434 |
|
|
SV * callback |
435 |
|
|
PROTOTYPE: $$ |
436 |
|
|
ALIAS: |
437 |
|
|
aio_lstat = 1 |
438 |
|
|
CODE: |
439 |
|
|
{ |
440 |
|
|
aio_req req; |
441 |
|
|
|
442 |
|
|
Newz (0, req, 1, aio_cb); |
443 |
|
|
|
444 |
|
|
if (!req) |
445 |
|
|
croak ("out of memory during aio_req allocation"); |
446 |
|
|
|
447 |
|
|
New (0, req->statdata, 1, Stat_t); |
448 |
|
|
|
449 |
|
|
if (!req->statdata) |
450 |
|
|
croak ("out of memory during aio_req->statdata allocation"); |
451 |
|
|
|
452 |
|
|
if (SvPOK (fh_or_path)) |
453 |
|
|
{ |
454 |
|
|
req->type = ix ? REQ_LSTAT : REQ_STAT; |
455 |
|
|
req->data = newSVsv (fh_or_path); |
456 |
|
|
req->dataptr = SvPV_nolen (req->data); |
457 |
|
|
} |
458 |
|
|
else |
459 |
|
|
{ |
460 |
|
|
req->type = REQ_FSTAT; |
461 |
|
|
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
462 |
|
|
} |
463 |
|
|
|
464 |
|
|
req->callback = SvREFCNT_inc (callback); |
465 |
|
|
|
466 |
|
|
send_req (req); |
467 |
|
|
} |
468 |
|
|
|
469 |
|
|
void |
470 |
|
|
aio_unlink(pathname,callback) |
471 |
|
|
SV * pathname |
472 |
|
|
SV * callback |
473 |
|
|
PROTOTYPE: $$ |
474 |
|
|
CODE: |
475 |
|
|
{ |
476 |
|
|
aio_req req; |
477 |
|
|
|
478 |
|
|
Newz (0, req, 1, aio_cb); |
479 |
|
|
|
480 |
|
|
if (!req) |
481 |
|
|
croak ("out of memory during aio_req allocation"); |
482 |
|
|
|
483 |
|
|
req->type = REQ_UNLINK; |
484 |
|
|
req->data = newSVsv (pathname); |
485 |
|
|
req->dataptr = SvPV_nolen (req->data); |
486 |
|
|
req->callback = SvREFCNT_inc (callback); |
487 |
|
|
|
488 |
|
|
send_req (req); |
489 |
|
|
} |
490 |
|
|
|
491 |
|
|
int |
492 |
|
|
poll_fileno() |
493 |
|
|
PROTOTYPE: |
494 |
|
|
CODE: |
495 |
|
|
RETVAL = respipe[0]; |
496 |
|
|
OUTPUT: |
497 |
|
|
RETVAL |
498 |
|
|
|
499 |
|
|
int |
500 |
|
|
poll_cb(...) |
501 |
|
|
PROTOTYPE: |
502 |
|
|
CODE: |
503 |
|
|
RETVAL = poll_cb (aTHX); |
504 |
|
|
OUTPUT: |
505 |
|
|
RETVAL |
506 |
|
|
|
507 |
|
|
void |
508 |
|
|
poll_wait() |
509 |
|
|
PROTOTYPE: |
510 |
|
|
CODE: |
511 |
|
|
poll_wait (); |
512 |
|
|
|
513 |
|
|
int |
514 |
|
|
nreqs() |
515 |
|
|
PROTOTYPE: |
516 |
|
|
CODE: |
517 |
|
|
RETVAL = nreqs; |
518 |
|
|
OUTPUT: |
519 |
|
|
RETVAL |
520 |
|
|
|