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Unified Diff: webrtc/base/sequenced_task_checker_impl.cc

Issue 2125113003: Implement SequencedTaskChecker. (Closed) Base URL: https://chromium.googlesource.com/external/webrtc.git@master
Patch Set: Addressed comments. Created 4 years, 5 months ago
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Index: webrtc/base/sequenced_task_checker_impl.cc
diff --git a/webrtc/base/sequenced_task_checker_impl.cc b/webrtc/base/sequenced_task_checker_impl.cc
new file mode 100644
index 0000000000000000000000000000000000000000..971cc65d384d6489d20d3705eceed72a513653f6
--- /dev/null
+++ b/webrtc/base/sequenced_task_checker_impl.cc
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/base/sequenced_task_checker_impl.h"
+
+#include "webrtc/base/platform_thread.h"
+#include "webrtc/base/sequenced_task_checker.h"
+
+namespace rtc {
+
+SequencedTaskCheckerImpl::SequencedTaskCheckerImpl()
+ : attached_(true), valid_queue_(TaskQueue::Current()) {}
+
+SequencedTaskCheckerImpl::~SequencedTaskCheckerImpl() {}
+
+bool SequencedTaskCheckerImpl::CalledSequentially() const {
+ TaskQueue* current_queue = TaskQueue::Current();
+ CritScope scoped_lock(&lock_);
+ if (!attached_) { // true if previously detached.
+ valid_queue_ = current_queue;
+ attached_ = true;
+ }
+ if (!valid_queue_)
+ return thread_checker_.CalledOnValidThread();
+ return valid_queue_ == current_queue;
+}
+
+void SequencedTaskCheckerImpl::Detach() {
+ CritScope scoped_lock(&lock_);
+ attached_ = false;
+ valid_queue_ = nullptr;
+ thread_checker_.DetachFromThread();
+}
+
+namespace internal {
+
+SequencedTaskCheckerScope::SequencedTaskCheckerScope(
+ const SequencedTaskChecker* checker) {
+ RTC_DCHECK(checker->CalledSequentially());
+}
+
+SequencedTaskCheckerScope::~SequencedTaskCheckerScope() {}
+
+} // namespace internal
+} // namespace rtc
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