old_thread_select.c
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/* test case for deprecated C API */
#include "ruby/ruby.h"
#include "ruby/io.h"
static fd_set * array2fdset(fd_set *fds, VALUE ary, int *max)
{
long i;
if (NIL_P(ary))
return NULL;
FD_ZERO(fds);
Check_Type(ary, T_ARRAY);
for (i = 0; i < RARRAY_LEN(ary); i++) {
VALUE val = RARRAY_PTR(ary)[i];
int fd;
Check_Type(val, T_FIXNUM);
fd = FIX2INT(val);
if (fd >= *max)
*max = fd + 1;
FD_SET(fd, fds);
}
return fds;
}
static void fdset2array(VALUE dst, fd_set *fds, int max)
{
int i;
rb_ary_clear(dst);
for (i = 0; i < max; i++) {
if (FD_ISSET(i, fds))
rb_ary_push(dst, INT2NUM(i));
}
}
static VALUE
old_thread_select(VALUE klass, VALUE r, VALUE w, VALUE e, VALUE timeout)
{
struct timeval tv;
struct timeval *tvp = NULL;
fd_set rfds, wfds, efds;
fd_set *rp, *wp, *ep;
int rc;
int max = 0;
if (!NIL_P(timeout)) {
tv = rb_time_timeval(timeout);
tvp = &tv;
}
rp = array2fdset(&rfds, r, &max);
wp = array2fdset(&wfds, w, &max);
ep = array2fdset(&efds, e, &max);
rc = rb_thread_select(max, rp, wp, ep, tvp);
if (rc == -1)
rb_sys_fail("rb_wait_for_single_fd");
if (rp)
fdset2array(r, &rfds, max);
if (wp)
fdset2array(w, &wfds, max);
if (ep)
fdset2array(e, &efds, max);
return INT2NUM(rc);
}
void
Init_old_thread_select(void)
{
rb_define_singleton_method(rb_cIO, "old_thread_select",
old_thread_select, 4);
}