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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef CONTENT_CHILD_CHILD_PROCESS_H_ | 5 #ifndef CONTENT_CHILD_CHILD_PROCESS_H_ |
| 6 #define CONTENT_CHILD_CHILD_PROCESS_H_ | 6 #define CONTENT_CHILD_CHILD_PROCESS_H_ |
| 7 | 7 |
| 8 #include <memory> | 8 #include <memory> |
| 9 | 9 |
| 10 #include "base/macros.h" | 10 #include "base/macros.h" |
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| 62 // These are used for ref-counting the child process. The process shuts | 62 // These are used for ref-counting the child process. The process shuts |
| 63 // itself down when the ref count reaches 0. | 63 // itself down when the ref count reaches 0. |
| 64 // For example, in the renderer process, generally each tab managed by this | 64 // For example, in the renderer process, generally each tab managed by this |
| 65 // process will hold a reference to the process, and release when closed. | 65 // process will hold a reference to the process, and release when closed. |
| 66 // However for renderer processes specifically, there is also fast shutdown | 66 // However for renderer processes specifically, there is also fast shutdown |
| 67 // code path initiated by the browser process. The process refcount does | 67 // code path initiated by the browser process. The process refcount does |
| 68 // not influence fast shutdown. See blink::Platform::suddenTerminationChanged. | 68 // not influence fast shutdown. See blink::Platform::suddenTerminationChanged. |
| 69 void AddRefProcess(); | 69 void AddRefProcess(); |
| 70 void ReleaseProcess(); | 70 void ReleaseProcess(); |
| 71 | 71 |
| 72 #if defined(OS_LINUX) |
| 73 void SetIOThreadPriority(base::ThreadPriority io_thread_priority); |
| 74 #endif |
| 75 |
| 72 // Getter for the one ChildProcess object for this process. Can only be called | 76 // Getter for the one ChildProcess object for this process. Can only be called |
| 73 // on the main thread. | 77 // on the main thread. |
| 74 static ChildProcess* current(); | 78 static ChildProcess* current(); |
| 75 | 79 |
| 76 static void WaitForDebugger(const std::string& label); | 80 static void WaitForDebugger(const std::string& label); |
| 77 private: | 81 private: |
| 78 int ref_count_; | 82 int ref_count_; |
| 79 | 83 |
| 80 // An event that will be signalled when we shutdown. | 84 // An event that will be signalled when we shutdown. |
| 81 base::WaitableEvent shutdown_event_; | 85 base::WaitableEvent shutdown_event_; |
| 82 | 86 |
| 83 // The thread that handles IO events. | 87 // The thread that handles IO events. |
| 84 base::Thread io_thread_; | 88 base::Thread io_thread_; |
| 85 | 89 |
| 86 // NOTE: make sure that main_thread_ is listed after shutdown_event_, since | 90 // NOTE: make sure that main_thread_ is listed after shutdown_event_, since |
| 87 // it depends on it (indirectly through IPC::SyncChannel). Same for | 91 // it depends on it (indirectly through IPC::SyncChannel). Same for |
| 88 // io_thread_. | 92 // io_thread_. |
| 89 std::unique_ptr<ChildThreadImpl> main_thread_; | 93 std::unique_ptr<ChildThreadImpl> main_thread_; |
| 90 | 94 |
| 91 DISALLOW_COPY_AND_ASSIGN(ChildProcess); | 95 DISALLOW_COPY_AND_ASSIGN(ChildProcess); |
| 92 }; | 96 }; |
| 93 | 97 |
| 94 } // namespace content | 98 } // namespace content |
| 95 | 99 |
| 96 #endif // CONTENT_CHILD_CHILD_PROCESS_H_ | 100 #endif // CONTENT_CHILD_CHILD_PROCESS_H_ |
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