1 files changed, 24 insertions, 0 deletions
diff --git a/include/backend/drm/bo_handle_table.h b/include/backend/drm/bo_handle_table.h
new file mode 100644
index 00000000..d086df45
--- /dev/null
+++ b/include/backend/drm/bo_handle_table.h
@@ -0,0 +1,24 @@
+#ifndef BACKEND_DRM_BO_HANDLE_TABLE_H
+#define BACKEND_DRM_BO_HANDLE_TABLE_H
+
+/**
+ * Table performing reference counting for buffer object handles.
+ *
+ * The BO handles are allocated incrementally and are recycled by the kernel,
+ * so a simple array is used.
+ *
+ * This design is inspired from amdgpu's code in libdrm:
+ * https://gitlab.freedesktop.org/mesa/drm/-/blob/1a4c0ec9aea13211997f982715fe5ffcf19dd067/amdgpu/handle_table.c
+ */
+struct wlr_drm_bo_handle_table {
+	size_t *nrefs;
+	size_t len;
+};
+
+void drm_bo_handle_table_finish(struct wlr_drm_bo_handle_table *table);
+bool drm_bo_handle_table_ref(struct wlr_drm_bo_handle_table *table,
+	uint32_t handle);
+size_t drm_bo_handle_table_unref(struct wlr_drm_bo_handle_table *table,
+	uint32_t handle);
+
+#endif