Add support for IO#timeout.

Author: ioquatix

ext/openssl/ossl_ssl.c

@@ -1729,7 +1729,9 @@ static void
 io_wait_writable(VALUE io)
 {
 #ifdef HAVE_RB_IO_MAYBE_WAIT
-    rb_io_maybe_wait_writable(errno, io, RUBY_IO_TIMEOUT_DEFAULT);
+    if (!rb_io_maybe_wait_writable(errno, io, RUBY_IO_TIMEOUT_DEFAULT)) {
+        rb_raise(rb_eIOTimeoutError, "Timed out while waiting to become writable!");
+    }
 #else
     rb_io_t *fptr;
     GetOpenFile(io, fptr);
@@ -1741,7 +1743,9 @@ static void
 io_wait_readable(VALUE io)
 {
 #ifdef HAVE_RB_IO_MAYBE_WAIT
-    rb_io_maybe_wait_readable(errno, io, RUBY_IO_TIMEOUT_DEFAULT);
+    if (!rb_io_maybe_wait_readable(errno, io, RUBY_IO_TIMEOUT_DEFAULT)) {
+        rb_raise(rb_eIOTimeoutError, "Timed out while waiting to become readable!");
+    }
 #else
     rb_io_t *fptr;
     GetOpenFile(io, fptr);

lib/openssl/ssl.rb

@@ -299,6 +299,16 @@ def wait_readable(*args)
       def wait_writable(*args)
         to_io.wait_writable(*args)
       end
+
+      if IO.method_defined?(:timeout)
+        def timeout
+          to_io.timeout
+        end
+
+        def timeout=(value)
+          to_io.timeout=(value)
+        end
+      end
     end
 
     def verify_certificate_identity(cert, hostname)

test/openssl/test_ssl.rb

@@ -193,6 +193,17 @@ def test_sysread_and_syswrite
     }
   end
 
+  def test_read_with_timeout
+    omit "does not support timeout" unless IO.method_defined?(:timeout)
+
+    start_server do |port|
+      server_connect(port) do |ssl|
+        ssl.timeout = 0.001
+        assert_raise(IO::TimeoutError) {ssl.read(1)}
+      end
+    end
+  end
+
   def test_getbyte
     start_server { |port|
       server_connect(port) { |ssl|