text: // Copyright 2017 the V8 project 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 V8_OBJECTS_MODULE_INL_H_
  #define V8_OBJECTS_MODULE_INL_H_
  
  #include "src/objects/module.h"
  #include "src/objects/source-text-module.h"
  #include "src/objects/synthetic-module.h"
  
  #include "src/objects/objects-inl.h"  // Needed for write barriers
  #include "src/objects/scope-info.h"
  #include "src/objects/string-inl.h"
  
  // Has to be the last include (doesn't have include guards):
  #include "src/objects/object-macros.h"
  
  namespace v8 {
  namespace internal {
  
  OBJECT_CONSTRUCTORS_IMPL(Module, HeapObject)
  TQ_OBJECT_CONSTRUCTORS_IMPL(SourceTextModule)
  TQ_OBJECT_CONSTRUCTORS_IMPL(SourceTextModuleInfoEntry)
  TQ_OBJECT_CONSTRUCTORS_IMPL(SyntheticModule)
  TQ_OBJECT_CONSTRUCTORS_IMPL(JSModuleNamespace)
  
  NEVER_READ_ONLY_SPACE_IMPL(Module)
  NEVER_READ_ONLY_SPACE_IMPL(SourceTextModule)
  NEVER_READ_ONLY_SPACE_IMPL(SyntheticModule)
  
  CAST_ACCESSOR(Module)
  ACCESSORS(Module, exports, ObjectHashTable, kExportsOffset)
  ACCESSORS(Module, module_namespace, HeapObject, kModuleNamespaceOffset)
  ACCESSORS(Module, exception, Object, kExceptionOffset)
  SMI_ACCESSORS(Module, status, kStatusOffset)
  SMI_ACCESSORS(Module, hash, kHashOffset)
  
  TQ_SMI_ACCESSORS(SourceTextModule, dfs_index)
  TQ_SMI_ACCESSORS(SourceTextModule, dfs_ancestor_index)
  TQ_SMI_ACCESSORS(SourceTextModule, flags)
  BOOL_ACCESSORS(SourceTextModule, flags, async, kAsyncBit)
  BOOL_ACCESSORS(SourceTextModule, flags, async_evaluating, kAsyncEvaluatingBit)
  TQ_SMI_ACCESSORS(SourceTextModule, pending_async_dependencies)
  ACCESSORS(SourceTextModule, async_parent_modules, ArrayList,
            kAsyncParentModulesOffset)
  ACCESSORS(SourceTextModule, top_level_capability, HeapObject,
            kTopLevelCapabilityOffset)
  
  SourceTextModuleInfo SourceTextModule::info() const {
    return status() == kErrored
               ? SourceTextModuleInfo::cast(code())
               : GetSharedFunctionInfo().scope_info().ModuleDescriptorInfo();
  }
  
  TQ_SMI_ACCESSORS(SourceTextModuleInfoEntry, module_request)
  TQ_SMI_ACCESSORS(SourceTextModuleInfoEntry, cell_index)
  TQ_SMI_ACCESSORS(SourceTextModuleInfoEntry, beg_pos)
  TQ_SMI_ACCESSORS(SourceTextModuleInfoEntry, end_pos)
  
  OBJECT_CONSTRUCTORS_IMPL(SourceTextModuleInfo, FixedArray)
  CAST_ACCESSOR(SourceTextModuleInfo)
  
  FixedArray SourceTextModuleInfo::module_requests() const {
    return FixedArray::cast(get(kModuleRequestsIndex));
  }
  
  FixedArray SourceTextModuleInfo::special_exports() const {
    return FixedArray::cast(get(kSpecialExportsIndex));
  }
  
  FixedArray SourceTextModuleInfo::regular_exports() const {
    return FixedArray::cast(get(kRegularExportsIndex));
  }
  
  FixedArray SourceTextModuleInfo::regular_imports() const {
    return FixedArray::cast(get(kRegularImportsIndex));
  }
  
  FixedArray SourceTextModuleInfo::namespace_imports() const {
    return FixedArray::cast(get(kNamespaceImportsIndex));
  }
  
  FixedArray SourceTextModuleInfo::module_request_positions() const {
    return FixedArray::cast(get(kModuleRequestPositionsIndex));
  }
  
  #ifdef DEBUG
  bool SourceTextModuleInfo::Equals(SourceTextModuleInfo other) const {
    return regular_exports() == other.regular_exports() &&
           regular_imports() == other.regular_imports() &&
           special_exports() == other.special_exports() &&
           namespace_imports() == other.namespace_imports() &&
           module_requests() == other.module_requests() &&
           module_request_positions() == other.module_request_positions();
  }
  #endif
  
  struct ModuleHandleHash {
    V8_INLINE size_t operator()(Handle<Module> module) const {
      return module->hash();
    }
  };
  
  struct ModuleHandleEqual {
    V8_INLINE bool operator()(Handle<Module> lhs, Handle<Module> rhs) const {
      return *lhs == *rhs;
    }
  };
  
  class UnorderedModuleSet
      : public std::unordered_set<Handle<Module>, ModuleHandleHash,
                                  ModuleHandleEqual,
                                  ZoneAllocator<Handle<Module>>> {
   public:
    explicit UnorderedModuleSet(Zone* zone)
        : std::unordered_set<Handle<Module>, ModuleHandleHash, ModuleHandleEqual,
                             ZoneAllocator<Handle<Module>>>(
              2 /* bucket count */, ModuleHandleHash(), ModuleHandleEqual(),
              ZoneAllocator<Handle<Module>>(zone)) {}
  };
  
  void SourceTextModule::AddAsyncParentModule(Isolate* isolate,
                                              Handle<SourceTextModule> module,
                                              Handle<SourceTextModule> parent) {
    Handle<ArrayList> async_parent_modules(module->async_parent_modules(),
                                           isolate);
    Handle<ArrayList> new_array_list =
        ArrayList::Add(isolate, async_parent_modules, parent);
    module->set_async_parent_modules(*new_array_list);
  }
  
  Handle<SourceTextModule> SourceTextModule::GetAsyncParentModule(
      Isolate* isolate, int index) {
    Handle<SourceTextModule> module(
        SourceTextModule::cast(async_parent_modules().Get(index)), isolate);
    return module;
  }
  
  int SourceTextModule::AsyncParentModuleCount() {
    return async_parent_modules().Length();
  }
  
  bool SourceTextModule::HasPendingAsyncDependencies() {
    DCHECK_GE(pending_async_dependencies(), 0);
    return pending_async_dependencies() > 0;
  }
  
  void SourceTextModule::IncrementPendingAsyncDependencies() {
    set_pending_async_dependencies(pending_async_dependencies() + 1);
  }
  
  void SourceTextModule::DecrementPendingAsyncDependencies() {
    set_pending_async_dependencies(pending_async_dependencies() - 1);
  }
  
  }  // namespace internal
  }  // namespace v8
  
  #include "src/objects/object-macros-undef.h"
  
  #endif  // V8_OBJECTS_MODULE_INL_H_
  