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// Copyright 2011 Google Inc. All Rights Reserved.
#include "intern_table.h"
#include "scoped_ptr.h"
namespace art {
InternTable::InternTable() {
intern_table_lock_ = Mutex::Create("InternTable::Lock");
}
void InternTable::VisitRoots(Heap::RootVistor* root_visitor, void* arg) {
MutexLock mu(intern_table_lock_);
typedef Table::const_iterator It; // TODO: C++0x auto
for (It it = intern_table_.begin(), end = intern_table_.end(); it != end; ++it) {
root_visitor(it->second, arg);
}
}
String* InternTable::Intern(int32_t utf16_length, const char* utf8_data_in) {
scoped_array<uint16_t> utf16_data_out(new uint16_t[utf16_length]);
String::ConvertModifiedUtf8ToUtf16(utf16_data_out.get(), utf8_data_in);
int32_t hash_code = String::ComputeUtf16Hash(utf16_data_out.get(), utf16_length);
{
MutexLock mu(intern_table_lock_);
typedef Table::const_iterator It; // TODO: C++0x auto
for (It it = intern_table_.find(hash_code), end = intern_table_.end(); it != end; ++it) {
String* string = it->second;
if (string->Equals(utf16_data_out.get(), 0, utf16_length)) {
return string;
}
}
String* new_string = String::AllocFromUtf16(utf16_length, utf16_data_out.get(), hash_code);
intern_table_.insert(std::make_pair(hash_code, new_string));
return new_string;
}
}
} // namespace art
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