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54 lines
1.9 KiB
C++
54 lines
1.9 KiB
C++
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef MOJO_PUBLIC_CPP_ENVIRONMENT_ENVIRONMENT_H_
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#define MOJO_PUBLIC_CPP_ENVIRONMENT_ENVIRONMENT_H_
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#include "mojo/public/cpp/system/macros.h"
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struct MojoAsyncWaiter;
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struct MojoLogger;
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namespace mojo {
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struct TaskTracker;
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// Other parts of the Mojo C++ APIs use the *static* methods of this class.
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//
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// The "standalone" implementation of this class requires that this class (in
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// the lib/ subdirectory) be instantiated (and remain so) while using the Mojo
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// C++ APIs. I.e., the static methods depend on things set up by the constructor
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// and torn down by the destructor.
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//
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// Other implementations may not have this requirement.
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class Environment {
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public:
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Environment();
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// This constructor allows the standard implementations to be overridden (set
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// a parameter to null to get the standard implementation).
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Environment(const MojoAsyncWaiter* default_async_waiter,
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const MojoLogger* default_logger,
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const TaskTracker* default_task_tracker);
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~Environment();
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static const MojoAsyncWaiter* GetDefaultAsyncWaiter();
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static const MojoLogger* GetDefaultLogger();
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static const TaskTracker* GetDefaultTaskTracker();
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// These instantiate and destroy an environment-specific run loop for the
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// current thread, allowing |GetDefaultAsyncWaiter()| to be used. (The run
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// loop itself should be accessible via thread-local storage, using methods
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// specific to the run loop implementation.) Creating and destroying nested
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// run loops is not supported.
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static void InstantiateDefaultRunLoop();
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static void DestroyDefaultRunLoop();
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private:
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MOJO_DISALLOW_COPY_AND_ASSIGN(Environment);
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};
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} // namespace mojo
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#endif // MOJO_PUBLIC_CPP_ENVIRONMENT_ENVIRONMENT_H_
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