Abseil Common Libraries (C++) (grcp 依赖)
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93 lines
2.8 KiB
93 lines
2.8 KiB
// Copyright 2020 The Abseil Authors. |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// https://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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#include "absl/strings/internal/cord_internal.h" |
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#include <atomic> |
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#include <cassert> |
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#include <memory> |
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#include "absl/container/inlined_vector.h" |
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#include "absl/strings/internal/cord_rep_btree.h" |
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#include "absl/strings/internal/cord_rep_crc.h" |
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#include "absl/strings/internal/cord_rep_flat.h" |
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#include "absl/strings/internal/cord_rep_ring.h" |
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namespace absl { |
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ABSL_NAMESPACE_BEGIN |
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namespace cord_internal { |
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ABSL_CONST_INIT std::atomic<bool> cord_btree_enabled(kCordEnableBtreeDefault); |
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ABSL_CONST_INIT std::atomic<bool> cord_ring_buffer_enabled( |
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kCordEnableRingBufferDefault); |
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ABSL_CONST_INIT std::atomic<bool> shallow_subcords_enabled( |
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kCordShallowSubcordsDefault); |
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ABSL_CONST_INIT std::atomic<bool> cord_btree_exhaustive_validation(false); |
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void CordRep::Destroy(CordRep* rep) { |
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assert(rep != nullptr); |
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absl::InlinedVector<CordRep*, Constants::kInlinedVectorSize> pending; |
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while (true) { |
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assert(!rep->refcount.IsImmortal()); |
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if (rep->tag == CONCAT) { |
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CordRepConcat* rep_concat = rep->concat(); |
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CordRep* right = rep_concat->right; |
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if (!right->refcount.Decrement()) { |
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pending.push_back(right); |
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} |
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CordRep* left = rep_concat->left; |
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delete rep_concat; |
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rep = nullptr; |
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if (!left->refcount.Decrement()) { |
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rep = left; |
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continue; |
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} |
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} else if (rep->tag == BTREE) { |
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CordRepBtree::Destroy(rep->btree()); |
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rep = nullptr; |
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} else if (rep->tag == RING) { |
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CordRepRing::Destroy(rep->ring()); |
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rep = nullptr; |
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} else if (rep->tag == EXTERNAL) { |
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CordRepExternal::Delete(rep); |
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rep = nullptr; |
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} else if (rep->tag == SUBSTRING) { |
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CordRepSubstring* rep_substring = rep->substring(); |
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CordRep* child = rep_substring->child; |
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delete rep_substring; |
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rep = nullptr; |
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if (!child->refcount.Decrement()) { |
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rep = child; |
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continue; |
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} |
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} else if (rep->tag == CRC) { |
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CordRepCrc::Destroy(rep->crc()); |
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rep = nullptr; |
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} else { |
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CordRepFlat::Delete(rep); |
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rep = nullptr; |
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} |
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if (!pending.empty()) { |
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rep = pending.back(); |
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pending.pop_back(); |
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} else { |
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break; |
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} |
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} |
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} |
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} // namespace cord_internal |
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ABSL_NAMESPACE_END |
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} // namespace absl
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