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Unified Diff: tools/gn/builder_record.h

Issue 56433003: GN threading refactor (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 7 years, 1 month ago
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Index: tools/gn/builder_record.h
diff --git a/tools/gn/builder_record.h b/tools/gn/builder_record.h
new file mode 100644
index 0000000000000000000000000000000000000000..aadd21e371b33c856f135e3a116bfb8c73560f1c
--- /dev/null
+++ b/tools/gn/builder_record.h
@@ -0,0 +1,112 @@
+// 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.
+
+#ifndef TOOLS_GN_BUILDER_RECORD_H_
+#define TOOLS_GN_BUILDER_RECORD_H_
+
+#include <set>
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "tools/gn/item.h"
+#include "tools/gn/location.h"
+
+class ParseNode;
+
+// This class is used by the builder to manage the loading of the dependency
+// tree. It holds a reference to an item and links to other records that the
+// item depends on, both resolved ones, and unresolved ones.
+//
+// If a target depends on another one that hasn't been defined yet, we'll make
+// a placeholder BuilderRecord with no item, and try to load the buildfile
+// associated with the new item. The item will get filled in when we encounter
+// the declaration for the item (or when we're done and realize there are
+// undefined items).
+//
+// You can also have null item pointers when the target is not required for
+// the current build (should_generate is false).
+class BuilderRecord {
+ public:
+ typedef std::set<BuilderRecord*> BuilderRecordSet;
+
+ enum ItemType {
+ ITEM_UNKNOWN,
+ ITEM_TARGET,
+ ITEM_CONFIG,
+ ITEM_TOOLCHAIN
+ };
+
+ //BuilderRecord();
+ BuilderRecord(ItemType type, const Label& label);
+ ~BuilderRecord();
+
+ ItemType type() const { return type_; }
+ const Label& label() const { return label_; }
+
+ // Returns a user-ready name for the given type. e.g. "target".
+ static const char* GetNameForType(ItemType type);
+
+ // Returns true if the given item is of the given type.
+ static bool IsItemOfType(const Item* item, ItemType type);
+
+ // Returns the type enum for the given item.
+ static ItemType TypeOfItem(const Item* item);
+
+ Item* item() { return item_.get(); }
+ const Item* item() const { return item_.get(); }
+ void set_item(scoped_ptr<Item> item) { item_ = item.Pass(); }
+
+ // Indicates from where this item was originally referenced from that caused
+ // it to be loaded. For targets for which we encountered the declaration
+ // before a reference, this will be the empty range.
+ const ParseNode* originally_referenced_from() const {
+ return originally_referenced_from_;
+ }
+ void set_originally_referenced_from(const ParseNode* pn) {
+ originally_referenced_from_ = pn;
+ }
+
+ bool should_generate() const { return should_generate_; }
+ void set_should_generate(bool sg) { should_generate_ = sg; }
+
+ bool resolved() const { return resolved_; }
+ void set_resolved(bool r) { resolved_ = r; }
+
+ bool can_resolve() const {
+ return item_ && unresolved_deps_.empty();
+ }
+
+ // All records this one is depending on.
+ BuilderRecordSet& all_deps() { return all_deps_; }
+ const BuilderRecordSet& all_deps() const { return all_deps_; }
+
+ // Unresolved records this one is depending on. A subset of all... above.
+ BuilderRecordSet& unresolved_deps() { return unresolved_deps_; }
+ const BuilderRecordSet& unresolved_deps() const { return unresolved_deps_; }
+
+ // Records that are waiting on this one to be resolved. This is the other
+ // end of the "unresolved deps" arrow.
+ BuilderRecordSet& waiting_on_resolution() { return waiting_on_resolution_; }
+ const BuilderRecordSet& waiting_on_resolution() const {
+ return waiting_on_resolution_;
+ }
+
+ void AddDep(BuilderRecord* record);
+
+ private:
+ ItemType type_;
+ Label label_;
+ scoped_ptr<Item> item_;
+ const ParseNode* originally_referenced_from_;
+ bool should_generate_;
+ bool resolved_;
+
+ BuilderRecordSet all_deps_;
+ BuilderRecordSet unresolved_deps_;
+ BuilderRecordSet waiting_on_resolution_;
+
+ DISALLOW_COPY_AND_ASSIGN(BuilderRecord);
+};
+
+#endif // TOOLS_GN_BUILDER_RECORD_H_
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