GN threading refactor

tools/gn/builder_record.cc

Index: tools/gn/builder_record.cc
diff --git a/tools/gn/builder_record.cc b/tools/gn/builder_record.cc
new file mode 100644
index 0000000000000000000000000000000000000000..80ecc2c1f7c42233ee66ef89fe195bb57cd36211
--- /dev/null
+++ b/tools/gn/builder_record.cc
@@ -0,0 +1,69 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "tools/gn/builder_record.h"
+
+#include "tools/gn/item.h"
+
+BuilderRecord::BuilderRecord(ItemType type, const Label& label)
+    : type_(type),
+      label_(label),
+      originally_referenced_from_(NULL),
+      should_generate_(false),
+      resolved_(false) {
+}
+
+BuilderRecord::~BuilderRecord() {
+}
+
+// static
+const char* BuilderRecord::GetNameForType(ItemType type) {
+  switch (type) {
+    case ITEM_TARGET:
+      return "target";
+    case ITEM_CONFIG:
+      return "config";
+    case ITEM_TOOLCHAIN:
+      return "toolchain";
+    case ITEM_UNKNOWN:
+    default:
+      return "unknown";
+  }
+}
+
+// static
+bool BuilderRecord::IsItemOfType(const Item* item, ItemType type) {
+  switch (type) {
+    case ITEM_TARGET:
+      return !!item->AsTarget();
+    case ITEM_CONFIG:
+      return !!item->AsConfig();
+    case ITEM_TOOLCHAIN:
+      return !!item->AsToolchain();
+    case ITEM_UNKNOWN:
+    default:
+      return false;
+  }
+}
+
+// static
+BuilderRecord::ItemType BuilderRecord::TypeOfItem(const Item* item) {
+  if (item->AsTarget())
+    return ITEM_TARGET;
+  if (item->AsConfig())
+    return ITEM_CONFIG;
+  if (item->AsToolchain())
+    return ITEM_TOOLCHAIN;
+
+  NOTREACHED();
+  return ITEM_UNKNOWN;
+}
+
+void BuilderRecord::AddDep(BuilderRecord* record) {
+  all_deps_.insert(record);
+  if (!record->resolved()) {
+    unresolved_deps_.insert(record);
+    record->waiting_on_resolution_.insert(this);
+  }
+}