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| 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 |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef TOOLS_GN_BUILDER_RECORD_H_ |
| 6 #define TOOLS_GN_BUILDER_RECORD_H_ |
| 7 |
| 8 #include <set> |
| 9 |
| 10 #include "base/basictypes.h" |
| 11 #include "base/memory/scoped_ptr.h" |
| 12 #include "tools/gn/item.h" |
| 13 #include "tools/gn/location.h" |
| 14 |
| 15 class ParseNode; |
| 16 |
| 17 // This class is used by the builder to manage the loading of the dependency |
| 18 // tree. It holds a reference to an item and links to other records that the |
| 19 // item depends on, both resolved ones, and unresolved ones. |
| 20 // |
| 21 // If a target depends on another one that hasn't been defined yet, we'll make |
| 22 // a placeholder BuilderRecord with no item, and try to load the buildfile |
| 23 // associated with the new item. The item will get filled in when we encounter |
| 24 // the declaration for the item (or when we're done and realize there are |
| 25 // undefined items). |
| 26 // |
| 27 // You can also have null item pointers when the target is not required for |
| 28 // the current build (should_generate is false). |
| 29 class BuilderRecord { |
| 30 public: |
| 31 typedef std::set<BuilderRecord*> BuilderRecordSet; |
| 32 |
| 33 enum ItemType { |
| 34 ITEM_UNKNOWN, |
| 35 ITEM_TARGET, |
| 36 ITEM_CONFIG, |
| 37 ITEM_TOOLCHAIN |
| 38 }; |
| 39 |
| 40 //BuilderRecord(); |
| 41 BuilderRecord(ItemType type, const Label& label); |
| 42 ~BuilderRecord(); |
| 43 |
| 44 ItemType type() const { return type_; } |
| 45 const Label& label() const { return label_; } |
| 46 |
| 47 // Returns a user-ready name for the given type. e.g. "target". |
| 48 static const char* GetNameForType(ItemType type); |
| 49 |
| 50 // Returns true if the given item is of the given type. |
| 51 static bool IsItemOfType(const Item* item, ItemType type); |
| 52 |
| 53 // Returns the type enum for the given item. |
| 54 static ItemType TypeOfItem(const Item* item); |
| 55 |
| 56 Item* item() { return item_.get(); } |
| 57 const Item* item() const { return item_.get(); } |
| 58 void set_item(scoped_ptr<Item> item) { item_ = item.Pass(); } |
| 59 |
| 60 // Indicates from where this item was originally referenced from that caused |
| 61 // it to be loaded. For targets for which we encountered the declaration |
| 62 // before a reference, this will be the empty range. |
| 63 const ParseNode* originally_referenced_from() const { |
| 64 return originally_referenced_from_; |
| 65 } |
| 66 void set_originally_referenced_from(const ParseNode* pn) { |
| 67 originally_referenced_from_ = pn; |
| 68 } |
| 69 |
| 70 bool should_generate() const { return should_generate_; } |
| 71 void set_should_generate(bool sg) { should_generate_ = sg; } |
| 72 |
| 73 bool resolved() const { return resolved_; } |
| 74 void set_resolved(bool r) { resolved_ = r; } |
| 75 |
| 76 bool can_resolve() const { |
| 77 return item_ && unresolved_deps_.empty(); |
| 78 } |
| 79 |
| 80 // All records this one is depending on. |
| 81 BuilderRecordSet& all_deps() { return all_deps_; } |
| 82 const BuilderRecordSet& all_deps() const { return all_deps_; } |
| 83 |
| 84 // Unresolved records this one is depending on. A subset of all... above. |
| 85 BuilderRecordSet& unresolved_deps() { return unresolved_deps_; } |
| 86 const BuilderRecordSet& unresolved_deps() const { return unresolved_deps_; } |
| 87 |
| 88 // Records that are waiting on this one to be resolved. This is the other |
| 89 // end of the "unresolved deps" arrow. |
| 90 BuilderRecordSet& waiting_on_resolution() { return waiting_on_resolution_; } |
| 91 const BuilderRecordSet& waiting_on_resolution() const { |
| 92 return waiting_on_resolution_; |
| 93 } |
| 94 |
| 95 void AddDep(BuilderRecord* record); |
| 96 |
| 97 private: |
| 98 ItemType type_; |
| 99 Label label_; |
| 100 scoped_ptr<Item> item_; |
| 101 const ParseNode* originally_referenced_from_; |
| 102 bool should_generate_; |
| 103 bool resolved_; |
| 104 |
| 105 BuilderRecordSet all_deps_; |
| 106 BuilderRecordSet unresolved_deps_; |
| 107 BuilderRecordSet waiting_on_resolution_; |
| 108 |
| 109 DISALLOW_COPY_AND_ASSIGN(BuilderRecord); |
| 110 }; |
| 111 |
| 112 #endif // TOOLS_GN_BUILDER_RECORD_H_ |
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