1 files changed, 118 insertions, 0 deletions
diff --git a/app/core/gimpwaitable.c b/app/core/gimpwaitable.c
new file mode 100644
index 0000000..4607f74
--- /dev/null
+++ b/app/core/gimpwaitable.c
@@ -0,0 +1,118 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpwaitable.c
+ * Copyright (C) 2018 Ell
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+
+#include "config.h"
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "core-types.h"
+
+#include "gimpwaitable.h"
+
+
+G_DEFINE_INTERFACE (GimpWaitable, gimp_waitable, G_TYPE_OBJECT)
+
+
+/*  private functions  */
+
+
+static void
+gimp_waitable_default_init (GimpWaitableInterface *iface)
+{
+}
+
+
+/*  public functions  */
+
+
+void
+gimp_waitable_wait (GimpWaitable *waitable)
+{
+  GimpWaitableInterface *iface;
+
+  g_return_if_fail (GIMP_IS_WAITABLE (waitable));
+
+  iface = GIMP_WAITABLE_GET_INTERFACE (waitable);
+
+  if (iface->wait)
+    iface->wait (waitable);
+}
+
+gboolean
+gimp_waitable_try_wait (GimpWaitable *waitable)
+{
+  GimpWaitableInterface *iface;
+
+  g_return_val_if_fail (GIMP_IS_WAITABLE (waitable), FALSE);
+
+  iface = GIMP_WAITABLE_GET_INTERFACE (waitable);
+
+  if (iface->try_wait)
+    {
+      return iface->try_wait (waitable);
+    }
+  else
+    {
+      gimp_waitable_wait (waitable);
+
+      return TRUE;
+    }
+}
+
+gboolean
+gimp_waitable_wait_until (GimpWaitable *waitable,
+                          gint64        end_time)
+{
+  GimpWaitableInterface *iface;
+
+  g_return_val_if_fail (GIMP_IS_WAITABLE (waitable), FALSE);
+
+  iface = GIMP_WAITABLE_GET_INTERFACE (waitable);
+
+  if (iface->wait_until)
+    {
+      return iface->wait_until (waitable, end_time);
+    }
+  else
+    {
+      gimp_waitable_wait (waitable);
+
+      return TRUE;
+    }
+}
+
+gboolean
+gimp_waitable_wait_for (GimpWaitable *waitable,
+                        gint64        wait_duration)
+{
+  g_return_val_if_fail (GIMP_IS_WAITABLE (waitable), FALSE);
+
+  if (wait_duration <= 0)
+    {
+      return gimp_waitable_try_wait (waitable);
+    }
+  else
+    {
+      return gimp_waitable_wait_until (waitable,
+                                       g_get_monotonic_time () + wait_duration);
+    }
+}