0c3e12b7bf
* Add a new WakeUp method that gives a module a chance to be called back right away on the worker thread.
* Wrote unit tests for the class.
* Significantly reduce the amount of locking.
- ProcessThreadImpl itself does a lot less locking.
- Reimplemented the way we keep track of when to make calls to Process.
This reduces the amount of calls to TimeUntilNextProcess and since most implementations of that function grab a lock, this means less locking.
* Renamed ProcessThread::CreateProcessThread to ProcessThread::Create.
* Added thread checks for Start/Stop. Threading model of other functions is now documented.
* We now log an error if an implementation of TimeUntilNextProcess returns a negative value (some implementations do, but the method should only return a positive nr of ms).
* Removed the DestroyProcessThread method and instead force callers to use scoped_ptr<> to maintain object lifetime.
BUG=2822
R=henrika@webrtc.org
Review URL: https://webrtc-codereview.appspot.com/35999004
Cr-Commit-Position: refs/heads/master@{#8261}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8261 4adac7df-926f-26a2-2b94-8c16560cd09d
59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
/*
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* Copyright (c) 2012 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 MODULES_INTERFACE_MODULE_H_
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#define MODULES_INTERFACE_MODULE_H_
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#include "webrtc/typedefs.h"
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namespace webrtc {
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class Module {
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public:
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// Returns the number of milliseconds until the module wants a worker
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// thread to call Process.
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// This method is called on the same worker thread as Process will
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// be called on.
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// TODO(tommi): Almost all implementations of this function, need to know
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// the current tick count. Consider passing it as an argument. It could
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// also improve the accuracy of when the next callback occurs since the
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// thread that calls Process() will also have it's tick count reference
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// which might not match with what the implementations use.
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virtual int64_t TimeUntilNextProcess() = 0;
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// Process any pending tasks such as timeouts.
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// Called on a worker thread.
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virtual int32_t Process() = 0;
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protected:
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virtual ~Module() {}
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};
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// Reference counted version of the Module interface.
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class RefCountedModule : public Module {
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public:
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// Increase the reference count by one.
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// Returns the incremented reference count.
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virtual int32_t AddRef() = 0;
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// Decrease the reference count by one.
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// Returns the decreased reference count.
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// Returns 0 if the last reference was just released.
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// When the reference count reaches 0 the object will self-destruct.
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virtual int32_t Release() = 0;
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protected:
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virtual ~RefCountedModule() {}
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};
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} // namespace webrtc
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#endif // MODULES_INTERFACE_MODULE_H_
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