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| 1 // Copyright 2012 the V8 project 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 V8_INTERFACE_H_ | |
| 6 #define V8_INTERFACE_H_ | |
| 7 | |
| 8 #include "src/zone.h" | |
| 9 | |
| 10 namespace v8 { | |
| 11 namespace internal { | |
| 12 | |
| 13 | |
| 14 class AstRawString; | |
| 15 | |
| 16 | |
| 17 // This class represents the interface of a module: a set of exported names. | |
| 18 // | |
| 19 // TODO(adamk): Rename this to ModuleRecord, ModuleDescriptor, or similar. | |
| 20 class Interface : public ZoneObject { | |
| 21 public: | |
| 22 // --------------------------------------------------------------------------- | |
| 23 // Factory methods. | |
| 24 | |
| 25 static Interface* New(Zone* zone) { return new (zone) Interface(); } | |
| 26 | |
| 27 // --------------------------------------------------------------------------- | |
| 28 // Mutators. | |
| 29 | |
| 30 // Add a name to the list of exports. If it already exists, or this interface | |
| 31 // is frozen, that's an error. | |
| 32 void Add(const AstRawString* name, Zone* zone, bool* ok); | |
| 33 | |
| 34 // Do not allow any further refinements, directly or through unification. | |
| 35 void Freeze() { frozen_ = true; } | |
| 36 | |
| 37 // Assign an index. | |
| 38 void Allocate(int index) { | |
| 39 DCHECK(IsFrozen() && index_ == -1); | |
| 40 index_ = index; | |
| 41 } | |
| 42 | |
| 43 // --------------------------------------------------------------------------- | |
| 44 // Accessors. | |
| 45 | |
| 46 // Check whether this is closed (i.e. fully determined). | |
| 47 bool IsFrozen() { return frozen_; } | |
| 48 | |
| 49 int Length() { | |
| 50 DCHECK(IsFrozen()); | |
| 51 ZoneHashMap* exports = exports_; | |
| 52 return exports ? exports->occupancy() : 0; | |
| 53 } | |
| 54 | |
| 55 // The context slot in the hosting script context pointing to this module. | |
| 56 int Index() { | |
| 57 DCHECK(IsFrozen()); | |
| 58 return index_; | |
| 59 } | |
| 60 | |
| 61 // --------------------------------------------------------------------------- | |
| 62 // Iterators. | |
| 63 | |
| 64 // Use like: | |
| 65 // for (auto it = interface->iterator(); !it.done(); it.Advance()) { | |
| 66 // ... it.name() ... it.interface() ... | |
| 67 // } | |
| 68 class Iterator { | |
| 69 public: | |
| 70 bool done() const { return entry_ == NULL; } | |
| 71 const AstRawString* name() const { | |
| 72 DCHECK(!done()); | |
| 73 return static_cast<const AstRawString*>(entry_->key); | |
| 74 } | |
| 75 void Advance() { entry_ = exports_->Next(entry_); } | |
| 76 | |
| 77 private: | |
| 78 friend class Interface; | |
| 79 explicit Iterator(const ZoneHashMap* exports) | |
| 80 : exports_(exports), entry_(exports ? exports->Start() : NULL) {} | |
| 81 | |
| 82 const ZoneHashMap* exports_; | |
| 83 ZoneHashMap::Entry* entry_; | |
| 84 }; | |
| 85 | |
| 86 Iterator iterator() const { return Iterator(this->exports_); } | |
| 87 | |
| 88 // --------------------------------------------------------------------------- | |
| 89 // Debugging. | |
| 90 #ifdef DEBUG | |
| 91 void Print(int n = 0); // n = indentation; n < 0 => don't print recursively | |
| 92 #endif | |
| 93 | |
| 94 // --------------------------------------------------------------------------- | |
| 95 // Implementation. | |
| 96 private: | |
| 97 bool frozen_; | |
| 98 ZoneHashMap* exports_; // Module exports and their types (allocated lazily) | |
| 99 int index_; | |
| 100 | |
| 101 Interface() : frozen_(false), exports_(NULL), index_(-1) { | |
| 102 #ifdef DEBUG | |
| 103 if (FLAG_print_interface_details) | |
| 104 PrintF("# Creating %p\n", static_cast<void*>(this)); | |
| 105 #endif | |
| 106 } | |
| 107 }; | |
| 108 | |
| 109 } } // namespace v8::internal | |
| 110 | |
| 111 #endif // V8_INTERFACE_H_ | |
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Chromium Code Reviews
Issue 935723004:
Rename Interface to ModuleDescriptor (Closed)
Base URL: https://chromium.googlesource.com/v8/v8.git@master