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Side by Side Diff: ppapi/host/resource_message_filter.h

Issue 630883002: replace OVERRIDE and FINAL with override and final in ppapi/ (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 6 years, 2 months ago
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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 PPAPI_HOST_RESOURCE_MESSAGE_FILTER_H_ 5 #ifndef PPAPI_HOST_RESOURCE_MESSAGE_FILTER_H_
6 #define PPAPI_HOST_RESOURCE_MESSAGE_FILTER_H_ 6 #define PPAPI_HOST_RESOURCE_MESSAGE_FILTER_H_
7 7
8 #include "base/memory/ref_counted.h" 8 #include "base/memory/ref_counted.h"
9 #include "ppapi/c/pp_stdint.h" 9 #include "ppapi/c/pp_stdint.h"
10 #include "ppapi/host/host_message_context.h" 10 #include "ppapi/host/host_message_context.h"
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42 // liftetime of a ResourceHost is managed by a PpapiHost and may be destroyed 42 // liftetime of a ResourceHost is managed by a PpapiHost and may be destroyed
43 // before or while your message is being processed on another thread. 43 // before or while your message is being processed on another thread.
44 // If this is the case, the message handler will always be called but a reply 44 // If this is the case, the message handler will always be called but a reply
45 // may not be sent back to the host. 45 // may not be sent back to the host.
46 // 46 //
47 // To handle a resource message on another thread you should implement a 47 // To handle a resource message on another thread you should implement a
48 // subclass as follows: 48 // subclass as follows:
49 // class MyMessageFilter : public ResourceMessageFilter { 49 // class MyMessageFilter : public ResourceMessageFilter {
50 // protected: 50 // protected:
51 // virtual scoped_refptr<base::TaskRunner> OverrideTaskRunnerForMessage( 51 // virtual scoped_refptr<base::TaskRunner> OverrideTaskRunnerForMessage(
52 // const IPC::Message& message) OVERRIDE { 52 // const IPC::Message& message) override {
53 // if (message.type() == MyMessage::ID) 53 // if (message.type() == MyMessage::ID)
54 // return BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI); 54 // return BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI);
55 // return NULL; 55 // return NULL;
56 // } 56 // }
57 // 57 //
58 // virtual int32_t OnResourceMessageReceived( 58 // virtual int32_t OnResourceMessageReceived(
59 // const IPC::Message& msg, 59 // const IPC::Message& msg,
60 // HostMessageContext* context) OVERRIDE { 60 // HostMessageContext* context) override {
61 // IPC_BEGIN_MESSAGE_MAP(MyMessageFilter, msg) 61 // IPC_BEGIN_MESSAGE_MAP(MyMessageFilter, msg)
62 // PPAPI_DISPATCH_HOST_RESOURCE_CALL(MyMessage, OnMyMessage) 62 // PPAPI_DISPATCH_HOST_RESOURCE_CALL(MyMessage, OnMyMessage)
63 // IPC_END_MESSAGE_MAP() 63 // IPC_END_MESSAGE_MAP()
64 // return PP_ERROR_FAILED; 64 // return PP_ERROR_FAILED;
65 // } 65 // }
66 // 66 //
67 // private: 67 // private:
68 // int32_t OnMyMessage(ppapi::host::HostMessageContext* context, ...) { 68 // int32_t OnMyMessage(ppapi::host::HostMessageContext* context, ...) {
69 // // Will be run on the UI thread. 69 // // Will be run on the UI thread.
70 // } 70 // }
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90 scoped_refptr<base::MessageLoopProxy> reply_thread_message_loop_proxy); 90 scoped_refptr<base::MessageLoopProxy> reply_thread_message_loop_proxy);
91 91
92 // Called when a filter is added to a ResourceHost. 92 // Called when a filter is added to a ResourceHost.
93 void OnFilterAdded(ResourceHost* resource_host); 93 void OnFilterAdded(ResourceHost* resource_host);
94 // Called when a filter is removed from a ResourceHost. 94 // Called when a filter is removed from a ResourceHost.
95 void OnFilterDestroyed(); 95 void OnFilterDestroyed();
96 96
97 // This will dispatch the message handler on the target thread. It returns 97 // This will dispatch the message handler on the target thread. It returns
98 // true if the message was handled by this filter and false otherwise. 98 // true if the message was handled by this filter and false otherwise.
99 virtual bool HandleMessage(const IPC::Message& msg, 99 virtual bool HandleMessage(const IPC::Message& msg,
100 HostMessageContext* context) OVERRIDE; 100 HostMessageContext* context) override;
101 101
102 // This can be called from any thread. 102 // This can be called from any thread.
103 virtual void SendReply(const ReplyMessageContext& context, 103 virtual void SendReply(const ReplyMessageContext& context,
104 const IPC::Message& msg) OVERRIDE; 104 const IPC::Message& msg) override;
105 105
106 protected: 106 protected:
107 virtual ~ResourceMessageFilter(); 107 virtual ~ResourceMessageFilter();
108 108
109 // Please see the comments of |resource_host_| for on which thread it can be 109 // Please see the comments of |resource_host_| for on which thread it can be
110 // used and when it is NULL. 110 // used and when it is NULL.
111 ResourceHost* resource_host() const { return resource_host_; } 111 ResourceHost* resource_host() const { return resource_host_; }
112 112
113 // If you want the message to be handled on another thread, return a non-null 113 // If you want the message to be handled on another thread, return a non-null
114 // task runner which will target tasks accordingly. 114 // task runner which will target tasks accordingly.
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140 // is destroyed, |OnFilterDestroyed| is called and this will be set to NULL. 140 // is destroyed, |OnFilterDestroyed| is called and this will be set to NULL.
141 ResourceHost* resource_host_; 141 ResourceHost* resource_host_;
142 142
143 DISALLOW_COPY_AND_ASSIGN(ResourceMessageFilter); 143 DISALLOW_COPY_AND_ASSIGN(ResourceMessageFilter);
144 }; 144 };
145 145
146 } // namespace host 146 } // namespace host
147 } // namespace ppapi 147 } // namespace ppapi
148 148
149 #endif // PPAPI_HOST_RESOURCE_MESSAGE_FILTER_H_ 149 #endif // PPAPI_HOST_RESOURCE_MESSAGE_FILTER_H_
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