1 /*
2  * Copyright (C) 2019 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef _UI_INPUT_INPUTDISPATCHER_INJECTIONSTATE_H
18 #define _UI_INPUT_INPUTDISPATCHER_INJECTIONSTATE_H
19 
20 #include "InputDispatcherInterface.h"
21 
22 #include <stdint.h>
23 
24 namespace android::inputdispatcher {
25 
26 /*
27  * Constants used to determine the input event injection synchronization mode.
28  */
29 enum {
30     /* Injection is asynchronous and is assumed always to be successful. */
31     INPUT_EVENT_INJECTION_SYNC_NONE = 0,
32 
33     /* Waits for previous events to be dispatched so that the input dispatcher can determine
34      * whether input event injection willbe permitted based on the current input focus.
35      * Does not wait for the input event to finish processing. */
36     INPUT_EVENT_INJECTION_SYNC_WAIT_FOR_RESULT = 1,
37 
38     /* Waits for the input event to be completely processed. */
39     INPUT_EVENT_INJECTION_SYNC_WAIT_FOR_FINISHED = 2,
40 };
41 
42 struct InjectionState {
43     mutable int32_t refCount;
44 
45     int32_t injectorPid;
46     int32_t injectorUid;
47     int32_t injectionResult;             // initially INPUT_EVENT_INJECTION_PENDING
48     bool injectionIsAsync;               // set to true if injection is not waiting for the result
49     int32_t pendingForegroundDispatches; // the number of foreground dispatches in progress
50 
51     InjectionState(int32_t injectorPid, int32_t injectorUid);
52     void release();
53 
54 private:
55     ~InjectionState();
56 };
57 
58 } // namespace android::inputdispatcher
59 
60 #endif // _UI_INPUT_INPUTDISPATCHER_INJECTIONSTATE_H
61