Repo created

TMessagesProj/jni/voip/webrtc/base/task/thread_pool/task.cc

@@ -0,0 +1,45 @@
+// 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/thread_pool/task.h"
+
+#include <utility>
+
+#include "base/atomic_sequence_num.h"
+
+namespace base {
+namespace internal {
+
+namespace {
+
+AtomicSequenceNumber g_sequence_nums_for_tracing;
+
+}  // namespace
+
+Task::Task() = default;
+
+Task::Task(const Location& posted_from, OnceClosure task, TimeDelta delay)
+    : PendingTask(posted_from,
+                  std::move(task),
+                  delay.is_zero() ? TimeTicks() : TimeTicks::Now() + delay,
+                  Nestable::kNonNestable) {
+  // ThreadPoolImpl doesn't use |sequence_num| but tracing (toplevel.flow)
+  // relies on it being unique. While this subtle dependency is a bit
+  // overreaching, ThreadPoolImpl is the only task system that doesn't use
+  // |sequence_num| and the dependent code rarely changes so this isn't worth a
+  // big change and faking it here isn't too bad for now (posting tasks is full
+  // of atomic ops already).
+  this->sequence_num = g_sequence_nums_for_tracing.GetNext();
+}
+
+// This should be "= default but MSVC has trouble with "noexcept = default" in
+// this case.
+Task::Task(Task&& other) noexcept : PendingTask(std::move(other)) {}
+
+Task::~Task() = default;
+
+Task& Task::operator=(Task&& other) = default;
+
+}  // namespace internal
+}  // namespace base