libsysprof-profile: bring over mapped ring buffer source

src/libsysprof-profile/mapped-ring-buffer-source-private.h

@@ -0,0 +1,41 @@
+/* mapped-ring-buffer-source-private.h
+ *
+ * Copyright 2020 Christian Hergert <chergert@redhat.com>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include <glib.h>
+
+#include "mapped-ring-buffer.h"
+
+G_BEGIN_DECLS
+
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (MappedRingBuffer, mapped_ring_buffer_unref)
+
+G_GNUC_INTERNAL
+guint mapped_ring_buffer_create_source      (MappedRingBuffer         *self,
+                                             MappedRingBufferCallback  callback,
+                                             gpointer                  user_data);
+G_GNUC_INTERNAL
+guint mapped_ring_buffer_create_source_full (MappedRingBuffer         *self,
+                                             MappedRingBufferCallback  callback,
+                                             gpointer                  user_data,
+                                             GDestroyNotify            destroy);
+
+G_END_DECLS