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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /ipc/chromium/src/base/revocable_store.cc
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'ipc/chromium/src/base/revocable_store.cc')
-rw-r--r--ipc/chromium/src/base/revocable_store.cc49
1 files changed, 49 insertions, 0 deletions
diff --git a/ipc/chromium/src/base/revocable_store.cc b/ipc/chromium/src/base/revocable_store.cc
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index 000000000..9a586a5a6
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+++ b/ipc/chromium/src/base/revocable_store.cc
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/revocable_store.h"
+
+#include "base/logging.h"
+
+RevocableStore::Revocable::Revocable(RevocableStore* store)
+ : store_reference_(store->owning_reference_) {
+ // We AddRef() the owning reference.
+ DCHECK(store_reference_->store());
+ store_reference_->store()->Add(this);
+}
+
+RevocableStore::Revocable::~Revocable() {
+ if (!revoked()) {
+ // Notify the store of our destruction.
+ --(store_reference_->store()->count_);
+ }
+}
+
+RevocableStore::RevocableStore() : count_(0) {
+ // Create a new owning reference.
+ owning_reference_ = new StoreRef(this);
+}
+
+RevocableStore::~RevocableStore() {
+ // Revoke all the items in the store.
+ owning_reference_->set_store(NULL);
+}
+
+void RevocableStore::Add(Revocable* item) {
+ DCHECK(!item->revoked());
+ ++count_;
+}
+
+void RevocableStore::RevokeAll() {
+ // We revoke all the existing items in the store and reset our count.
+ owning_reference_->set_store(NULL);
+ count_ = 0;
+
+ // Then we create a new owning reference for new items that get added.
+ // This Release()s the old owning reference, allowing it to be freed after
+ // all the items that were in the store are eventually destroyed.
+ owning_reference_ = new StoreRef(this);
+}