45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
/*
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* Copyright 2019 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef RTC_BASE_SYNCHRONIZATION_YIELD_POLICY_H_
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#define RTC_BASE_SYNCHRONIZATION_YIELD_POLICY_H_
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namespace webrtc {
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class YieldInterface {
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public:
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virtual ~YieldInterface() = default;
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virtual void YieldExecution() = 0;
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};
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// Sets the current thread-local yield policy while it's in scope and reverts
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// to the previous policy when it leaves the scope.
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class ScopedYieldPolicy final {
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public:
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explicit ScopedYieldPolicy(YieldInterface* policy);
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ScopedYieldPolicy(const ScopedYieldPolicy&) = delete;
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ScopedYieldPolicy& operator=(const ScopedYieldPolicy&) = delete;
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~ScopedYieldPolicy();
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// Will yield as specified by the currently active thread-local yield policy
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// (which by default is a no-op).
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static void YieldExecution();
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private:
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YieldInterface* const previous_;
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};
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} // namespace webrtc
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// Re-export symbols from the webrtc namespace for backwards compatibility.
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// TODO(bugs.webrtc.org/4222596): Remove once all references are updated.
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namespace rtc {
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using ::webrtc::ScopedYieldPolicy;
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using ::webrtc::YieldInterface;
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} // namespace rtc
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#endif // RTC_BASE_SYNCHRONIZATION_YIELD_POLICY_H_
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