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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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