Abseil Common Libraries (C++) (grcp 依赖)
https://abseil.io/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
79 lines
2.2 KiB
79 lines
2.2 KiB
// Copyright 2020 The Abseil Authors. |
|
// |
|
// 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 |
|
// |
|
// https://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. |
|
#include "absl/strings/internal/cord_internal.h" |
|
|
|
#include <atomic> |
|
#include <cassert> |
|
#include <memory> |
|
|
|
#include "absl/container/inlined_vector.h" |
|
#include "absl/strings/internal/cord_rep_flat.h" |
|
|
|
namespace absl { |
|
ABSL_NAMESPACE_BEGIN |
|
namespace cord_internal { |
|
|
|
ABSL_CONST_INIT std::atomic<bool> cord_ring_buffer_enabled( |
|
kCordEnableRingBufferDefault); |
|
ABSL_CONST_INIT std::atomic<bool> shallow_subcords_enabled( |
|
kCordShallowSubcordsDefault); |
|
|
|
void CordRep::Destroy(CordRep* rep) { |
|
assert(rep != nullptr); |
|
|
|
absl::InlinedVector<CordRep*, Constants::kInlinedVectorSize> pending; |
|
while (true) { |
|
assert(!rep->refcount.IsImmortal()); |
|
if (rep->tag == CONCAT) { |
|
CordRepConcat* rep_concat = rep->concat(); |
|
CordRep* right = rep_concat->right; |
|
if (!right->refcount.Decrement()) { |
|
pending.push_back(right); |
|
} |
|
CordRep* left = rep_concat->left; |
|
delete rep_concat; |
|
rep = nullptr; |
|
if (!left->refcount.Decrement()) { |
|
rep = left; |
|
continue; |
|
} |
|
} else if (rep->tag == EXTERNAL) { |
|
CordRepExternal::Delete(rep); |
|
rep = nullptr; |
|
} else if (rep->tag == SUBSTRING) { |
|
CordRepSubstring* rep_substring = rep->substring(); |
|
CordRep* child = rep_substring->child; |
|
delete rep_substring; |
|
rep = nullptr; |
|
if (!child->refcount.Decrement()) { |
|
rep = child; |
|
continue; |
|
} |
|
} else { |
|
CordRepFlat::Delete(rep); |
|
rep = nullptr; |
|
} |
|
|
|
if (!pending.empty()) { |
|
rep = pending.back(); |
|
pending.pop_back(); |
|
} else { |
|
break; |
|
} |
|
} |
|
} |
|
|
|
} // namespace cord_internal |
|
ABSL_NAMESPACE_END |
|
} // namespace absl
|
|
|