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Diffstat (limited to 'runtime/base/bit_vector-inl.h')
-rw-r--r-- | runtime/base/bit_vector-inl.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/runtime/base/bit_vector-inl.h b/runtime/base/bit_vector-inl.h new file mode 100644 index 0000000000..dc13dd5b9f --- /dev/null +++ b/runtime/base/bit_vector-inl.h @@ -0,0 +1,80 @@ +/* + * Copyright (C) 2013 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef ART_RUNTIME_BASE_BIT_VECTOR_INL_H_ +#define ART_RUNTIME_BASE_BIT_VECTOR_INL_H_ + +#include "bit_vector.h" +#include "logging.h" +#include "utils.h" + +namespace art { + +inline bool BitVector::IndexIterator::operator==(const IndexIterator& other) const { + DCHECK(bit_storage_ == other.bit_storage_); + DCHECK_EQ(storage_size_, other.storage_size_); + return bit_index_ == other.bit_index_; +} + +inline int BitVector::IndexIterator::operator*() const { + DCHECK_LT(bit_index_, BitSize()); + return bit_index_; +} + +inline BitVector::IndexIterator& BitVector::IndexIterator::operator++() { + DCHECK_LT(bit_index_, BitSize()); + bit_index_ = FindIndex(bit_index_ + 1u); + return *this; +} + +inline BitVector::IndexIterator BitVector::IndexIterator::operator++(int) { + IndexIterator result(*this); + ++*this; + return result; +} + +inline uint32_t BitVector::IndexIterator::FindIndex(uint32_t start_index) const { + DCHECK_LE(start_index, BitSize()); + uint32_t word_index = start_index / kWordBits; + if (UNLIKELY(word_index == storage_size_)) { + return start_index; + } + uint32_t word = bit_storage_[word_index]; + // Mask out any bits in the first word we've already considered. + word &= static_cast<uint32_t>(-1) << (start_index & 0x1f); + while (word == 0u) { + ++word_index; + if (UNLIKELY(word_index == storage_size_)) { + return BitSize(); + } + word = bit_storage_[word_index]; + } + return word_index * 32u + CTZ(word); +} + +inline void BitVector::ClearAllBits() { + memset(storage_, 0, storage_size_ * kWordBytes); +} + +inline bool BitVector::Equal(const BitVector* src) const { + return (storage_size_ == src->GetStorageSize()) && + (expandable_ == src->IsExpandable()) && + (memcmp(storage_, src->GetRawStorage(), storage_size_ * sizeof(uint32_t)) == 0); +} + +} // namespace art + +#endif // ART_RUNTIME_BASE_BIT_VECTOR_INL_H_ |