3 files changed, 33 insertions, 0 deletions
diff --git a/ext/-test-/wait_for_single_fd/depend b/ext/-test-/wait_for_single_fd/depend
new file mode 100644
index 0000000000..d9cd50a542
--- /dev/null
+++ b/ext/-test-/wait_for_single_fd/depend
@@ -0,0 +1,2 @@
+wait_for_single_fd.o: $(top_srcdir)/thread.c \
+  $(hdrdir)/ruby/ruby.h $(hdrdir)/ruby/io.h
diff --git a/ext/-test-/wait_for_single_fd/extconf.rb b/ext/-test-/wait_for_single_fd/extconf.rb
new file mode 100644
index 0000000000..1a28b23da3
--- /dev/null
+++ b/ext/-test-/wait_for_single_fd/extconf.rb
@@ -0,0 +1 @@
+create_makefile("-test-/wait_for_single_fd/wait_for_single_fd")
diff --git a/ext/-test-/wait_for_single_fd/wait_for_single_fd.c b/ext/-test-/wait_for_single_fd/wait_for_single_fd.c
new file mode 100644
index 0000000000..d406724a3f
--- /dev/null
+++ b/ext/-test-/wait_for_single_fd/wait_for_single_fd.c
@@ -0,0 +1,30 @@
+#include "ruby/ruby.h"
+#include "ruby/io.h"
+
+static VALUE
+wait_for_single_fd(VALUE ign, VALUE fd, VALUE events, VALUE timeout)
+{
+    struct timeval tv;
+    struct timeval *tvp = NULL;
+    int rc;
+
+    if (!NIL_P(timeout)) {
+	tv = rb_time_timeval(timeout);
+	tvp = &tv;
+    }
+
+    rc = rb_wait_for_single_fd(NUM2INT(fd), NUM2INT(events), tvp);
+    if (rc == -1)
+	rb_sys_fail("rb_wait_for_single_fd");
+    return INT2NUM(rc);
+}
+
+void
+Init_wait_for_single_fd(void)
+{
+    rb_define_const(rb_cObject, "RB_WAITFD_IN", INT2NUM(RB_WAITFD_IN));
+    rb_define_const(rb_cObject, "RB_WAITFD_OUT", INT2NUM(RB_WAITFD_OUT));
+    rb_define_const(rb_cObject, "RB_WAITFD_PRI", INT2NUM(RB_WAITFD_PRI));
+    rb_define_singleton_method(rb_cIO, "wait_for_single_fd",
+                               wait_for_single_fd, 3);
+}