Class: IO
- Inherits:
-
Object
- Object
- IO
- Defined in:
- wait/lib/nonblock.rb
Instance Method Summary collapse
- #nonblock(nb = true) ⇒ Object
- #nonblock=(nb) ⇒ Object
- #nonblock? ⇒ Boolean
-
#ready? ⇒ Object
begin --- IO#ready? returns non-nil if input available without blocking, or nil.
-
#wait ⇒ Object
begin --- IO#wait() waits until input available or timed out and returns self, or nil when EOF reached.
Instance Method Details
#nonblock(nb = true) ⇒ Object
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# File 'wait/lib/nonblock.rb', line 17 def nonblock(nb = true) nb, self.nonblock = nonblock?, nb yield ensure self.nonblock = nb end |
#nonblock=(nb) ⇒ Object
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# File 'wait/lib/nonblock.rb', line 7 def nonblock=(nb) f = fcntl(Fcntl::F_GETFL) if nb f |= File::NONBLOCK else f &= ~File::NONBLOCK end fcntl(Fcntl::F_SETFL, f) end |
#nonblock? ⇒ Boolean
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# File 'wait/lib/nonblock.rb', line 3 def nonblock? (fcntl(Fcntl::F_GETFL) & File::NONBLOCK) != 0 end |
#ready? ⇒ Object
begin
--- IO#ready?
returns non-nil if input available without blocking, or nil.
end
|
# File 'wait/wait.c'
/*
=begin
--- IO#ready?
returns non-nil if input available without blocking, or nil.
=end
*/
static VALUE
io_ready_p(io)
VALUE io;
{
OpenFile *fptr;
FILE *fp;
ioctl_arg n;
GetOpenFile(io, fptr);
rb_io_check_readable(fptr);
if (!FIONREAD_POSSIBLE_P(fileno(fptr->f))) return Qfalse;
fp = fptr->f;
if (feof(fp)) return Qfalse;
if (rb_read_pending(fp)) return Qtrue;
if (ioctl(fileno(fp), FIONREAD, &n)) rb_sys_fail(0);
if (n > 0) return ioctl_arg2num(n);
return Qnil;
}
|
#wait ⇒ Object
begin
--- IO#wait()
waits until input available or timed out and returns self, or nil
when EOF reached.
end
|
# File 'wait/wait.c'
/*
=begin
--- IO#wait([timeout])
waits until input available or timed out and returns self, or nil
when EOF reached.
=end
*/
static VALUE
io_wait(argc, argv, io)
int argc;
VALUE *argv;
VALUE io;
{
OpenFile *fptr;
fd_set rd;
FILE *fp;
int fd;
ioctl_arg n;
VALUE timeout;
struct timeval *tp, timerec;
GetOpenFile(io, fptr);
rb_io_check_readable(fptr);
rb_scan_args(argc, argv, "01", &timeout);
if (NIL_P(timeout)) {
tp = 0;
}
else {
timerec = rb_time_interval(timeout);
tp = &timerec;
}
fp = fptr->f;
if (feof(fp)) return Qfalse;
if (rb_read_pending(fp)) return Qtrue;
fd = fileno(fp);
FD_ZERO(&rd);
FD_SET(fd, &rd);
if (rb_thread_select(fd + 1, &rd, NULL, NULL, tp) < 0)
rb_sys_fail(0);
rb_io_check_closed(fptr);
if (!FIONREAD_POSSIBLE_P(fileno(fptr->f))) return Qfalse;
if (ioctl(fileno(fp), FIONREAD, &n)) rb_sys_fail(0);
if (n > 0) return io;
return Qnil;
}
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