1 /******************************************************************************
2  *
3  *  Copyright 2015 Google, Inc.
4  *
5  *  Licensed under the Apache License, Version 2.0 (the "License");
6  *  you may not use this file except in compliance with the License.
7  *  You may obtain a copy of the License at:
8  *
9  *  http://www.apache.org/licenses/LICENSE-2.0
10  *
11  *  Unless required by applicable law or agreed to in writing, software
12  *  distributed under the License is distributed on an "AS IS" BASIS,
13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  *  See the License for the specific language governing permissions and
15  *  limitations under the License.
16  *
17  ******************************************************************************/
18 
19 #pragma once
20 
21 #include <hardware/bluetooth.h>
22 #include <stdbool.h>
23 
24 // Set the Bluetooth OS callouts to |callouts|.
25 // This function should be called when native kernel wakelocks are not used
26 // directly. If this function is not called, or |callouts| is NULL, then native
27 // kernel wakelocks will be used.
28 void wakelock_set_os_callouts(bt_os_callouts_t* callouts);
29 
30 // Acquire the Bluetooth wakelock.
31 // The function is thread safe.
32 // Return true on success, otherwise false.
33 bool wakelock_acquire(void);
34 
35 // Release the Bluetooth wakelock.
36 // The function is thread safe.
37 // Return true on success, otherwise false.
38 bool wakelock_release(void);
39 
40 // Cleanup the wakelock internal state.
41 // This function should be called by the OSI module cleanup during
42 // graceful shutdown.
43 void wakelock_cleanup(void);
44 
45 // This function should not need to be called normally.
46 // /sys/power/wake_{|un}lock are used by default.
47 // This is not guaranteed to have any effect after an alarm has been
48 // set with alarm_set.
49 // If |lock_path| or |unlock_path| are NULL, that path is not changed.
50 void wakelock_set_paths(const char* lock_path, const char* unlock_path);
51 
52 // Dump wakelock-related debug info to the |fd| file descriptor.
53 // The caller is responsible for closing the |fd|.
54 void wakelock_debug_dump(int fd);
55