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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef MOJO_PUBLIC_CPP_ENVIRONMENT_ENVIRONMENT_H_ | |
| 6 #define MOJO_PUBLIC_CPP_ENVIRONMENT_ENVIRONMENT_H_ | |
| 7 | |
| 8 #include "mojo/public/cpp/system/macros.h" | |
| 9 | |
| 10 struct MojoAsyncWaiter; | |
| 11 struct MojoLogger; | |
| 12 | |
| 13 namespace mojo { | |
| 14 | |
| 15 // Other parts of the Mojo C++ APIs use the *static* methods of this class. | |
| 16 // | |
| 17 // The "standalone" implementation of this class requires that this class (in | |
| 18 // the lib/ subdirectory) be instantiated (and remain so) while using the Mojo | |
| 19 // C++ APIs. I.e., the static methods depend on things set up by the constructor | |
| 20 // and torn down by the destructor. | |
| 21 // | |
| 22 // Other implementations may not have this requirement. | |
| 23 class Environment { | |
| 24 public: | |
| 25 Environment(); | |
| 26 // This constructor allows the standard implementations to be overridden (set | |
| 27 // a parameter to null to get the standard implementation). | |
| 28 Environment(const MojoAsyncWaiter* default_async_waiter, | |
| 29 const MojoLogger* default_logger); | |
| 30 ~Environment(); | |
| 31 | |
| 32 static const MojoAsyncWaiter* GetDefaultAsyncWaiter(); | |
| 33 static const MojoLogger* GetDefaultLogger(); | |
| 34 | |
| 35 // These instantiate and destroy an environment-specific run loop for the | |
| 36 // current thread, allowing |GetDefaultAsyncWaiter()| to be used. (The run | |
| 37 // loop itself should be accessible via thread-local storage, using methods | |
| 38 // specific to the run loop implementation.) Creating and destroying nested | |
| 39 // run loops is not supported. | |
| 40 static void InstantiateDefaultRunLoop(); | |
| 41 static void DestroyDefaultRunLoop(); | |
| 42 | |
| 43 private: | |
| 44 MOJO_DISALLOW_COPY_AND_ASSIGN(Environment); | |
| 45 }; | |
| 46 | |
| 47 } // namespace mojo | |
| 48 | |
| 49 #endif // MOJO_PUBLIC_CPP_ENVIRONMENT_ENVIRONMENT_H_ | |
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