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Side by Side Diff: tools/gn/item.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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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef TOOLS_GN_ITEM_H_ 5 #ifndef TOOLS_GN_ITEM_H_
6 #define TOOLS_GN_ITEM_H_ 6 #define TOOLS_GN_ITEM_H_
7 7
8 #include <string> 8 #include <string>
9 9
10 #include "tools/gn/label.h" 10 #include "tools/gn/label.h"
11 11
12 class Config; 12 class Config;
13 class ItemNode; 13 class ParseNode;
14 class Settings; 14 class Settings;
15 class Target; 15 class Target;
16 class Toolchain; 16 class Toolchain;
17 17
18 // A named item (target, config, etc.) that participates in the dependency 18 // A named item (target, config, etc.) that participates in the dependency
19 // graph. 19 // graph.
20 class Item { 20 class Item {
21 public: 21 public:
22 Item(const Settings* settings, const Label& label); 22 Item(const Settings* settings, const Label& label);
23 virtual ~Item(); 23 virtual ~Item();
24 24
25 const Settings* settings() const { return settings_; } 25 const Settings* settings() const { return settings_; }
26 26
27 // This is guaranteed to never change after construction so this can be 27 // This is guaranteed to never change after construction so this can be
28 // accessed from any thread with no locking once the item is constructed. 28 // accessed from any thread with no locking once the item is constructed.
29 const Label& label() const { return label_; } 29 const Label& label() const { return label_; }
30 30
31 // The Item and the ItemNode make a pair. This will be set when the ItemNode 31 const ParseNode* defined_from() const { return defined_from_; }
32 // is constructed that owns this Item. The ItemNode should only be 32 void set_defined_from(const ParseNode* df) { defined_from_ = df; }
33 // dereferenced with the ItemTree lock held.
34 ItemNode* item_node() { return item_node_; }
35 const ItemNode* item_node() const { return item_node_; }
36 void set_item_node(ItemNode* in) { item_node_ = in; }
37 33
38 // Manual RTTI. 34 // Manual RTTI.
39 virtual Config* AsConfig(); 35 virtual Config* AsConfig();
40 virtual const Config* AsConfig() const; 36 virtual const Config* AsConfig() const;
41 virtual Target* AsTarget(); 37 virtual Target* AsTarget();
42 virtual const Target* AsTarget() const; 38 virtual const Target* AsTarget() const;
43 virtual Toolchain* AsToolchain(); 39 virtual Toolchain* AsToolchain();
44 virtual const Toolchain* AsToolchain() const; 40 virtual const Toolchain* AsToolchain() const;
45 41
46 // Returns a name like "target" or "config" for the type of item this is, to 42 // Returns a name like "target" or "config" for the type of item this is, to
47 // be used in logging and error messages. 43 // be used in logging and error messages.
48 std::string GetItemTypeName() const; 44 std::string GetItemTypeName() const;
49 45
50 // Called when this item is resolved, meaning it and all of its dependents 46 // Called when this item is resolved, meaning it and all of its dependents
51 // have no unresolved deps. 47 // have no unresolved deps.
52 virtual void OnResolved() {} 48 virtual void OnResolved() {}
53 49
54 private: 50 private:
55 const Settings* settings_; 51 const Settings* settings_;
56 Label label_; 52 Label label_;
57 53 const ParseNode* defined_from_;
58 ItemNode* item_node_;
59 }; 54 };
60 55
61 #endif // TOOLS_GN_ITEM_H_ 56 #endif // TOOLS_GN_ITEM_H_
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