1 files changed, 126 insertions, 0 deletions
diff --git a/ruby_1_8_6/ext/io/wait/wait.c b/ruby_1_8_6/ext/io/wait/wait.c
new file mode 100644
index 0000000000..61d6527b36
--- /dev/null
+++ b/ruby_1_8_6/ext/io/wait/wait.c
@@ -0,0 +1,126 @@
+/**********************************************************************
+
+  io/wait.c -
+
+  $Author$
+  $Date$
+  created at: Tue Aug 28 09:08:06 JST 2001
+
+  All the files in this distribution are covered under the Ruby's
+  license (see the file COPYING).
+
+**********************************************************************/
+
+#include "ruby.h"
+#include "rubyio.h"
+
+#include <sys/types.h>
+#if defined(FIONREAD_HEADER)
+#include FIONREAD_HEADER
+#endif
+
+#ifdef HAVE_RB_W32_IOCTLSOCKET
+#define ioctl ioctlsocket
+#define ioctl_arg u_long
+#define ioctl_arg2num(i) ULONG2NUM(i)
+#else
+#define ioctl_arg int
+#define ioctl_arg2num(i) INT2NUM(i)
+#endif
+
+#ifdef HAVE_RB_W32_IS_SOCKET
+#define FIONREAD_POSSIBLE_P(fd) rb_w32_is_socket(fd)
+#else
+#define FIONREAD_POSSIBLE_P(fd) ((fd),Qtrue)
+#endif
+
+static VALUE io_ready_p _((VALUE io));
+static VALUE io_wait _((int argc, VALUE *argv, VALUE io));
+void Init_wait _((void));
+
+EXTERN struct timeval rb_time_interval _((VALUE time));
+
+/*
+=begin
+= IO wait methods.
+=end
+ */
+
+/*
+=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;
+}
+
+/*
+=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;
+}
+
+void
+Init_wait()
+{
+    rb_define_method(rb_cIO, "ready?", io_ready_p, 0);
+    rb_define_method(rb_cIO, "wait", io_wait, -1);
+}