TaskScheduler [10] SchedulerWorkerThreadStack

base/task_scheduler/scheduler_worker_thread_stack.cc

+// Copyright 2016 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/task_scheduler/scheduler_worker_thread_stack.h"
+
+#include <algorithm>
+
+#include "base/logging.h"
+
+namespace base {
+namespace internal {
+
+SchedulerWorkerThreadStack::SchedulerWorkerThreadStack() = default;
+
+SchedulerWorkerThreadStack::~SchedulerWorkerThreadStack() = default;
+
+void SchedulerWorkerThreadStack::Push(SchedulerWorkerThread* worker_thread) {
+  DCHECK(std::find(stack_.begin(), stack_.end(), worker_thread) == stack_.end())
+      << "SchedulerWorkerThread already on stack";
+  stack_.push_back(worker_thread);
+}
+
+SchedulerWorkerThread* SchedulerWorkerThreadStack::Pop() {
+  if (IsEmpty())
+    return nullptr;
+  SchedulerWorkerThread* const worker_thread = stack_.back();
+  stack_.pop_back();
+  return worker_thread;
+}
+
+void SchedulerWorkerThreadStack::Remove(
+    const SchedulerWorkerThread* worker_thread) {
+  auto it = std::find(stack_.begin(), stack_.end(), worker_thread);
+  if (it != stack_.end())
+    stack_.erase(it);
+}
+
+}  // namespace internal
+}  // namespace base