Abseil Common Libraries (C++) (grcp 依赖)
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77 lines
2.1 KiB
77 lines
2.1 KiB
4 years ago
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// 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_flat.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_ring_buffer_enabled(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 == 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 {
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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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